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HPCST-5000/-7000HPKST-12000HIGH-POWER TWTAHIGH-POWER TWTAHIGH-POWER TWTAHIGH-POWER TWTASATELLITE TERMINALSSATELLITE TERMINALSSATELLITE TERMINALSSATELLITE TERMINALSInstallation and Operation ManualInstallation and Operation ManualInstallation and Operation ManualInstallation and Operation Manual

Part Number MN/TWTA.I0MRevision 1

Copyright © EFData Corporation, 1998All rights reserved.Printed in the USA.

EFData Corporation, 2105 West 5th Place, Tempe, Arizona 85281 USA, (602) 968-0447, FAX: (602) 921-9012.

EFData Corporation is an ISO 9001 Registered Company

HPCST-5000/-7000HPCST-5000/-7000HPCST-5000/-7000HPCST-5000/-7000HPKST-12000HPKST-12000HPKST-12000HPKST-12000HIGH-POWER TWTAHIGH-POWER TWTAHIGH-POWER TWTAHIGH-POWER TWTASATELLITE TERMINALSSATELLITE TERMINALSSATELLITE TERMINALSSATELLITE TERMINALSInstallation and Operation ManualInstallation and Operation ManualInstallation and Operation ManualInstallation and Operation Manual

Part Number MN/TWTA.I0MRevision 1March 28, 1998

Special Instructions:

Change bars were not utilized. For an overview of changes made to Rev. 0, refer to the preface(“Overview of Changes to previous Edition”).

The revision supersedes part number MN/TWTA, Rev. 0 dated May 31,1997.

Warranty Policy

This EFData Corporation product is warranted against defects in material andworkmanship for a period of one year from the date of shipment. During the warrantyperiod, EFData will, at its option, repair or replace products that prove to be defective.

For equipment under warranty, the customer is responsible for freight to EFData andall related custom, taxes, tariffs, insurance, etc. EFData is responsible for the freightcharges only for return of the equipment from the factory to the customer. EFData willreturn the equipment by the same method (i.e., Air, Express, Surface) as theequipment was sent to EFData.

Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from improper installationor maintenance, abuse, unauthorized modification, or operation outside ofenvironmental specifications for the product, or, for damages that occur due toimproper repackaging of equipment for return to EFData.

No other warranty is expressed or implied. EFData Corporation specificallydisclaims the implied warranties of merchantability and fitness for particularpurpose.

Exclusive Remedies

The remedies provided herein are the buyer's sole and exclusive remedies. EFDataCorporation shall not be liable for any direct, indirect, special, incidental, orconsequential damages, whether based on contract, tort, or any other legal theory.

Disclaimer

EFData has reviewed this manual thoroughly in order that it will be an easy-to-useguide to your equipment. All statements, technical information, and recommendationsin this manual and in any guides or related documents are believed reliable, but theaccuracy and completeness thereof are not guaranteed or warranted, and they arenot intended to be, nor should they be understood to be, representations or warrantiesconcerning the products described. Further, EFData reserves the right to makechanges in the specifications of the products described in this manual at any timewithout notice and without obligation to notify any person of such changes.

If you have any questions regarding your equipment or the information in this manual,please contact the EFData Customer Support Department. (For more information,refer to the preface.)

Rev. 1 i

Preface

About this Manual

This manual provides installation and operation information for the EFData high-powerTraveling Wave Tube (TWT) amplifier (TWTA) systems for EFData satellite terminalsystems. This is a technical document intended for earth station engineers, technicians,and operators responsible for the operation and maintenance of the high-power TWTAsystems.

Conventions and References Used in this Manual

Cautions and Warnings

CAUTION

CAUTION indicates a hazardous situation that, if not avoided, may result inminor or moderate injury. CAUTION may also be used to indicate otherunsafe practices or risks of property damage.

WARNING

WARNING indicates a potentially hazardous situation that, if not avoided,could result in death or serious injury.

Trademarks

Product names mentioned in this manual may be trademarks or registered trademarks oftheir respective companies and are hereby acknowledged.

Preface High-Power TWTA Satellite Terminals

ii Rev. 1

Related Documents

The following documents are referenced in this manual:

• EFData CST-5000 C-Band Satellite Terminal Installation and OperationManual

• EFData CST-7000 C-Band Satellite Terminal (Insat) Installation and OperationManual

• EFData KST-12000 Ku-Band Satellite Terminal Installation and OperationManual

• EFData RSU-503 Redundancy Switch Unit Installation and Operation Manual

• IESS-309

Metric Conversions

Metric conversion information is located on the inside back cover of this manual. Thisinformation will assist the operator in cross-referencing English to Metric conversions.

Reporting Comments or Suggestions Concerning this Manual

Comments and suggestions regarding the content and design of this manual will beappreciated. To submit comments, please contact the EFData Customer SupportDepartment according to the following information.

Overview of Previous Editions

Changes made to Rev. 0 were:

Manual changed to reflect model number HPCST-5000/-7000 and HPKST -12000.Incorporated new styles and profiles.

High-Power TWTA Satellite Terminals Preface

Rev. 1 iii

Customer Support

Contact the EFData Customer Support Department for:

• Product support• Information on returning a product• Information on upgrading a product• Product training• Reporting comments or suggestions concerning manuals

An EFData Customer Support representative may be reached at:

EFData CorporationAttention: Customer Support Department2105 West 5th PlaceTempe, Arizona 85281 USA

(602) 968-0447 (Main EFData Number)(602) 370-7904 (24-Hour Customer Support Desk)(602) 921-9012 FAX

or, E-Mail can be sent to the Customer Support Department at:

[email protected]

or, contact Customer Support Department at the web site

www.efdata.com

To return an EFData product (in-warranty and out-of-warranty) for repair orreplacement:

1. Request a Return Material Authorization (RMA) number from the EFDataCustomer Support Department.

Be prepared to supply the Customer Support representative with the modelnumber, serial number, and a description of the problem.

2. To ensure that the product is not damaged during shipping, pack the product inits original shipping carton/packaging.

3. Ship the product back to EFData. (Shipping charges should be prepaid.)

For more information regarding the warranty policies, refer to the disclaimer pagelocated behind the title page.

Preface High-Power TWTA Satellite Terminals

iv Rev. 1

This page is intentionally left blank.

Rev. 1 v

Table of Contents

CHAPTER 1. INTRODUCTION..................................................................................1–1

1.1 Introduction...................................................................................................................................................... 1–2

1.2 Component Descriptions.................................................................................................................................. 1–71.2.1 Low-Noise Amplifier (LNA) Assembly ..................................................................................................... 1–71.2.2 Radio Frequency Terminal (RFT) .............................................................................................................. 1–71.2.3 TWTA Models............................................................................................................................................ 1–81.2.4 High-Power Controller (HPC) .................................................................................................................. 1–10

1.2.4.1 HPC-1200.......................................................................................................................................... 1–101.2.4.2 HPC-1110.......................................................................................................................................... 1–11

1.2.5 Redundant Switch Unit (RSU).................................................................................................................. 1–12

1.2 Equipment List ............................................................................................................................................... 1–13

1.3 Specifications .................................................................................................................................................. 1–171.3.1 System Interface ....................................................................................................................................... 1–171.3.2 Prime Power ............................................................................................................................................. 1–181.3.3 Performance.............................................................................................................................................. 1–19

1.3.3.1 Receive.............................................................................................................................................. 1–191.3.3.2 Transmit ............................................................................................................................................ 1–21

1.3.4 Environment ............................................................................................................................................. 1–251.3.5 Monitor and Control ................................................................................................................................. 1–261.3.6 Physical Size and Weight ......................................................................................................................... 1–27

Table of Contents High-Power TWTA Satellite Terminals

vi Rev. 1

CHAPTER 2. SINGLE THREAD SYSTEM INSTALLATION......................................2–1

2.1 Unpacking......................................................................................................................................................... 2–2

2.2 Inspecting the Equipment................................................................................................................................ 2–32.2.1 Included Parts ............................................................................................................................................. 2–3

2.3 TWTA Installation........................................................................................................................................... 2–72.3.1 Tools Required ........................................................................................................................................... 2–82.3.2 Vertical Pole Installation ............................................................................................................................ 2–9

2.3.2.1 Round Pole .......................................................................................................................................... 2–92.3.2.2 Square Pole........................................................................................................................................ 2–13

2.3.3 Spar Installation........................................................................................................................................ 2–142.3.4 External Connections................................................................................................................................ 2–16

2.3.4.1 TWTA Monitor & Control (J1)......................................................................................................... 2–182.3.4.1.1 Control Interfaces....................................................................................................................... 2–202.3.4.1.2 Digital Status Circuits ................................................................................................................ 2–212.3.4.1.3 Analog Status Circuits................................................................................................................ 2–232.3.4.1.4 Output Voltage Circuits ............................................................................................................. 2–242.3.4.1.5 Control/Status Ground Isolation ................................................................................................ 2–24

2.3.4.2 TWTA Prime Power (J2) .................................................................................................................. 2–252.3.4.2.1 Prime Power............................................................................................................................... 2–25

2.3.4.3 RF TX Input (J3) ............................................................................................................................... 2–262.3.4.4 RF TX Sample (J4) ........................................................................................................................... 2–272.3.4.5 RF Output (J5)................................................................................................................................... 2–272.3.4.6 Waveguide......................................................................................................................................... 2–272.3.4.7 System Interface Wiring.................................................................................................................... 2–28

2.4 HPC-1200 Installation ................................................................................................................................... 2–302.4.1 Mechanical................................................................................................................................................ 2–302.4.2 External Connections................................................................................................................................ 2–31

2.4.2.1 External Interfaces (J1) ..................................................................................................................... 2–312.4.2.1.1 Control Interfaces....................................................................................................................... 2–332.4.2.1.2 Digital Status Circuits ................................................................................................................ 2–332.4.2.1.3 Analog Status Circuits................................................................................................................ 2–352.4.2.1.4 Output Voltage Circuits ............................................................................................................. 2–35

2.4.2.2 ODU Monitor and Control (J2) ......................................................................................................... 2–362.4.2.3 Prime Power ...................................................................................................................................... 2–36

CHAPTER 3. REDUNDANT SYSTEM INSTALLATION ............................................3–1

3.1 Unpacking......................................................................................................................................................... 3–2

3.2 Inspecting the Equipment................................................................................................................................ 3–33.2.1 Included Parts ............................................................................................................................................. 3–3

3.3 TWTA Installation........................................................................................................................................... 3–93.3.1 Tools Required ......................................................................................................................................... 3–103.3.2 Vertical Pole Installation .......................................................................................................................... 3–11

3.3.2.1 Round Pole ........................................................................................................................................ 3–113.3.2.2 Square Pole........................................................................................................................................ 3–14

3.3.3 Spar Mount ............................................................................................................................................... 3–14

High-Power TWTA Satellite Terminals Table of Contents

Rev. 1 vii

3.3.4 External Connections................................................................................................................................ 3–153.3.4.1 System Interface Wiring.................................................................................................................... 3–15

3.4 HPC-1110 Installation ................................................................................................................................... 3–233.4.1 Mechanical................................................................................................................................................ 3–23

3.4.1.1 Cabinet Slide Assembly..................................................................................................................... 3–253.4.2 External Connections................................................................................................................................ 3–27

3.4.2.1 Standard Connections........................................................................................................................ 3–283.4.2.1.1 AC Prime Power ........................................................................................................................ 3–283.4.2.1.2 TWTA Serial Interface .............................................................................................................. 3–293.4.2.1.3 External Interlock/Remote Functions......................................................................................... 3–293.4.2.1.4 Waveguide Switch #1 ................................................................................................................ 3–293.4.2.1.5 Waveguide Switch #2 ................................................................................................................ 3–293.4.2.1.6 Remote Control Serial Interface................................................................................................. 3–30

3.4.2.2 “X” Insert Panel Connectors ............................................................................................................. 3–323.4.2.2.1 Auxiliary Interface ..................................................................................................................... 3–32

3.4.2.3 “X” Insert Panel Configurations........................................................................................................ 3–333.4.2.4 “Y” Insert Panel Connectors ............................................................................................................. 3–34

CHAPTER 4. TWT AMPLIFIERS...............................................................................4–1

4.1 Operation and Control .................................................................................................................................... 4–24.1.1 Control and Status Interface ....................................................................................................................... 4–24.1.2 Operating Modes ........................................................................................................................................ 4–2

4.1.2.1 Heater Delay........................................................................................................................................ 4–24.1.2.2 Heater Standby .................................................................................................................................... 4–34.1.2.3 Standby................................................................................................................................................ 4–34.1.2.4 High Voltage ON................................................................................................................................. 4–34.1.2.5 Fault..................................................................................................................................................... 4–4

4.1.2.5.1 Clearing Faults ............................................................................................................................. 4–54.1.3 Control and Status Signals .......................................................................................................................... 4–5

4.1.3.1 Control................................................................................................................................................. 4–54.1.3.2 Digital Status ....................................................................................................................................... 4–64.1.3.3 Analog ................................................................................................................................................. 4–7

4.1.4 Initial Power-Up ......................................................................................................................................... 4–84.1.4.1 Pre-Power Check................................................................................................................................. 4–84.1.4.2 Power-On Sequence ............................................................................................................................ 4–9

4.1.5 Shut Down .................................................................................................................................................. 4–9

4.2 Maintenance and Service............................................................................................................................... 4–104.2.1 Preventive Maintenance............................................................................................................................ 4–10

CHAPTER 5. CONTROLLER FOR SINGLE THREAD SYSTEMS............................5–1

5.1 Operation.......................................................................................................................................................... 5–25.1.1 LOCAL Control Configuration................................................................................................................... 5–35.1.2 REMOTE Control Configuration ............................................................................................................... 5–35.1.3 Controls and Indicators............................................................................................................................... 5–3


viii Rev. 1

5.2 Maintenance and Service................................................................................................................................. 5–95.2.1 Preventative Maintenance........................................................................................................................... 5–95.2.2 Operator Troubleshooting........................................................................................................................... 5–95.2.3 Clearing a Fault......................................................................................................................................... 5–10

5.2.3.1 Clearing a Fault-LOCAL Control Configuration............................................................................... 5–105.2.3.2 Clearing a Fault-REMOTE Control Configuration ........................................................................... 5–10

CHAPTER 6. CONTROLLER FOR REDUNDANT SYSTEMS ..................................6–1

6.1 Overview........................................................................................................................................................... 6–26.1.1 “X” Insert and “Y” Insert Panels ................................................................................................................ 6–2

6.2 Operation.......................................................................................................................................................... 6–36.2.1 User Operational Choices ........................................................................................................................... 6–3

6.2.1.1 Warm-Standby or Hot-Standby ........................................................................................................... 6–36.2.1.2 Manual or Automatic Switching.......................................................................................................... 6–4

6.2.2 Local Controls and Indicators..................................................................................................................... 6–46.2.2.1 Basic Controls and Indicators.............................................................................................................. 6–4

6.2.2.1.1 Power Indicator............................................................................................................................ 6–56.2.2.1.2 Local/Remote Push Button Switch............................................................................................... 6–56.2.2.1.3 Manual/Automatic Push Button Switch ....................................................................................... 6–66.2.2.1.4 HV ON Push Button Switch......................................................................................................... 6–76.2.2.1.7 Waveguide Switch Position Indicators......................................................................................... 6–86.2.2.1.8 Fault Reset Push Button Switch ................................................................................................... 6–86.2.2.1.9 Lamp Test Push Button Switch .................................................................................................... 6–8

6.2.3 TWTA Setup for Redundant System Operation ......................................................................................... 6–96.2.3.1 Remote Controller Mode..................................................................................................................... 6–96.2.3.2 Local Controller Mode ........................................................................................................................ 6–9

6.2.4 Initial Power-On ......................................................................................................................................... 6–96.2.5 Normal Operation ..................................................................................................................................... 6–10

APPENDIX A. PROGRAMMING GUIDE FOR REDUNDANT CONTROLLER......... A–1

A.1 Overview ..........................................................................................................................................................A–1A.1.1 Communication Protocols..........................................................................................................................A–2

A.2 Communication Protocols ..............................................................................................................................A–3A.2.1 Command Message Format........................................................................................................................A–3

A.2.1.1 Header and Ending Byte.....................................................................................................................A–3A.2.1.2 Primary Address Byte.........................................................................................................................A–4A.2.1.3 Secondary Address Byte.....................................................................................................................A–4A.2.1.4 Command Byte ...................................................................................................................................A–4A.2.1.5 Parameters ..........................................................................................................................................A–4A.2.1.6 Check Byte .........................................................................................................................................A–5A.2.1.7 Parity ..................................................................................................................................................A–5

A.2.2 Response Message Format.........................................................................................................................A–6A.2.2.1 Header and Ending Byte.....................................................................................................................A–6A.2.2.2 Address Byte ......................................................................................................................................A–6A.2.2.3 Response Byte ....................................................................................................................................A–6A.2.2.4 Parameters ..........................................................................................................................................A–6A.2.2.5 Check Byte .........................................................................................................................................A–6A.2.2.6 Parity ..................................................................................................................................................A–7


Rev. 1 ix

A.2.2.7 Command Reject Argument ...............................................................................................................A–7A.2.3 ASCII Reference Information ....................................................................................................................A–8

A.3 Redundant System Command Set................................................................................................................A–10A.3.1 Controller Query Commands ...................................................................................................................A–11A.3.2 Controller Control Commands.................................................................................................................A–13

A.4 TWTA Command Set....................................................................................................................................A–15A.4.1 TWTA Query Commands........................................................................................................................A–15A.4.2 TWTA Control Commands......................................................................................................................A–17

GLOSSARY .................................................................................................................g-1

INDEX ...........................................................................................................................i-1


x Rev. 1

Figures

Figure 1-1. HPCST-5000/-7000 and HPKST-12000 ............................................................................................... 1–1Figure 1-2. TWTA Redundant Assembly (Typical)................................................................................................. 1–3Figure 1-3. HPCST-5000/-7000 Redundant Terminal Systems Block Diagram (Typical) ...................................... 1–5Figure 1-4. HPKST-12000 Redundant Terminal System Block Diagram (Typical)................................................ 1–6Figure 1-5. 100W and 140W Unit Block Diagram .................................................................................................. 1–9Figure 1-6. 300W and 350W Unit Block Diagram .................................................................................................. 1–9Figure 1-7. HPC-1200 Single Thread Controller ................................................................................................... 1–10Figure 1-8. HPC-1110 1:1 Redundant Controller .................................................................................................. 1–11Figure 1-9. RSU-503L ........................................................................................................................................... 1–12Figure 1-10. TWTA Outline Drawing (Typical) .................................................................................................... 1–28Figure 1-11. HPC-1200 Outline Drawing .............................................................................................................. 1–29Figure 1-12. HPC-1110 Outline Drawing .............................................................................................................. 1–30Figure 2-1. Typical TWTA Spar Installation ......................................................................................................... 2–14Figure 2-2. 100W and 140W TWTA External Connections.................................................................................. 2–16Figure 2-3. 300W and 350W TWTA External Connections.................................................................................. 2–17Figure 2-4. Interface Connector Pinouts ................................................................................................................ 2–19Figure 2-5. TWT Temperature: Temperature vs. Voltage ..................................................................................... 2–23Figure 2-6. Single Phase AC Power Connections ................................................................................................. 2–26Figure 2-7. Single Thread System M&C Cable Harness (CA/5124)...................................................................... 2–29Figure 2-8. HPC-1200 Outline Drawing ................................................................................................................ 2–30Figure 2-9. HPC-1200 Rear Panel Connector Locations ....................................................................................... 2–31Figure 2-10. Interface Connector Pinouts .............................................................................................................. 2–32Figure 2-11. Digital Status Circuit Isolation .......................................................................................................... 2–33Figure 3-1. HPCST/HPKST 1:1 Redundant System Cable Harness (CA/5122).................................................... 3–16Figure 3-2. HPCST/KST 1:1 Redundant M&C System Interface Cable (Optional) (CA/5279) ............................ 3–18Figure 3-3. HPCST/HPKST 1:1 Uplink-Only Redundant System Cable Harness (CA/5248)............................... 3–20Figure 3-4. HPCST/HPKST HPCST/HPKST Single TWTA System Cable Harness (CA/5124) ......................... 3–22Figure 3-5. HPC-1110 Outline Drawing ................................................................................................................ 3–24Figure 3-6. Cabinet Slide Assemblies .................................................................................................................... 3–26Figure 3-7. HPC-1110 rear Panel........................................................................................................................... 3–27Figure 3-8. Prime Power Connector....................................................................................................................... 3–28Figure 3-9. Waveguide Switch Connector Pinouts................................................................................................. 3–29Figure 3-10. EIA-422, -485 Pinouts, COM2 Only................................................................................................. 3–31Figure 3-11. EIA-232-C Pinouts ............................................................................................................................ 3–32Figure 3-12. Auxiliary interface Connector Pinouts............................................................................................... 3–33Figure 3-13. “X” Insert Configuration ................................................................................................................... 3–34Figure 3-14. Configuration 1, “X” Insert Panel...................................................................................................... 3–34Figure 5-1. HPC-1200.............................................................................................................................................. 5–1Figure 5-2. Typical Configuration............................................................................................................................ 5–2Figure 5-3. Monitor Points and Lamp Test .............................................................................................................. 5–4Figure 5-4. Fault Indicators...................................................................................................................................... 5–5Figure 5-5. Status Indicators .................................................................................................................................... 5–6Figure 5-6. HPC-1200 Local Controls ..................................................................................................................... 5–7Figure 5-7. TEMP ANALOG Output Calibration.................................................................................................... 5–8Figure 6-1. HPC-1110.............................................................................................................................................. 6–1Figure 6-2. Basic HPC-1110 Rear Panel.................................................................................................................. 6–2


Rev. 1 xi

Tables

Table 1-1. Major Assemblies of the HPCST-5000/-7000 ........................................................................................ 1–2Table 1-2. Major Assemblies of the HPKST-12000 ................................................................................................ 1–3Table 1-3. TWTA Models........................................................................................................................................ 1–8Table 1-4. Description of the HPC-1200 ............................................................................................................... 1–10Table 1-5. Description of the HPC-1110 ............................................................................................................... 1–11Table 1-6. HPCST-5000/–7000 Single Thread Systems Equipment List (Typical)............................................... 1–13Table 1-7. HPKST-12000 Single Thread System Equipment List (Typical) ......................................................... 1–15Table 1-8. HPKST-12000 Redundant System Equipment List (Typical) .............................................................. 1–16Table 1-9. System Interfaces for System Components........................................................................................... 1–17Table 1-10. Prime Power ....................................................................................................................................... 1–18Table 1-11. HPCST-5000/–7000 Receive Characteristics ..................................................................................... 1–19Table 1-12. HPKST-12000 Receive Characteristics............................................................................................. 1–20Table 1-13. HPCST-5000 and -7000 Transmit Characteristics.............................................................................. 1–21Table 1-14. HPA-500, -700 Transmit Characteristics............................................................................................ 1–22Table 1-15. HPKST-12000 Transmit Characteristics ............................................................................................ 1–23Table 1-16. HPA-1200 Transmit Characteristics ................................................................................................... 1–24Table 1-17. ODU Environmental Specifications.................................................................................................... 1–25Table 1-18. IDU Environmental Specifications ..................................................................................................... 1–25Table 1-19. Monitor and Control ........................................................................................................................... 1–26Table 1-20. Physical Size and Weight Characteristics ........................................................................................... 1–27Table 2-1. External Connections............................................................................................................................ 2–16Table 2-2. TWTA Monitor & Control Pinouts ...................................................................................................... 2–18Table 2-3. Prime Power ......................................................................................................................................... 2–25Table 2-4. Mating Connector for AC Unit ............................................................................................................. 2–26Table 2-5. Rear Panel Connectors.......................................................................................................................... 2–31Table 2-6. Remote Control Interface Connector Pinouts ....................................................................................... 2–32Table 2-7. M&C Connector Pinouts ...................................................................................................................... 2–36Table 5-1. Monitor Point and Lamp Test Descriptions............................................................................................ 5–3Table 5-2. Fault Indicator Descriptions.................................................................................................................... 5–5Table 5-3. Status Indicator Desvcriptions ................................................................................................................ 5–6Table 5-4. HPC-1200 Local Control Descriptions................................................................................................... 5–7Table 6-1. HPC-1110 Local Functions..................................................................................................................... 6–4Table 6-2. Local/Remote Modes.............................................................................................................................. 6–5Table 6-3. Manual/Automatic Mode........................................................................................................................ 6–6Table 6-4. HV ON Push Button Switch ................................................................................................................... 6–7Table A-1. Header Byte Codes ................................................................................................................................A–1Table A-2. Command Not Executed Codes ............................................................................................................. A-7Table A-3. ASCII Cross Reference..........................................................................................................................A–8Table A-4. Meaning of Multi-Character ASCII Codes ............................................................................................A–9Table A-5. Redundant System Controller Query Commands.................................................................................A–11Table A-6. Redundant Sytem Controller Control Commands................................................................................A–13Table A-7. TWTA Query Commands....................................................................................................................A–15Table A-8. TWTA Control Commands..................................................................................................................A–17


xii Rev. 1


Rev. 1 1–1

1Chapter 1. INTRODUCTION

This chapter provides an overview of the Traveling Wave Tube Amplifier (TWTA)coupled with various components:

• HPCST-5000 high-power C-band satellite terminal (Figure 1-1)• HPCST-7000 high-power extended C-band satellite terminal (Figure 1-1)• HPKST-12000 high-power Ku-band satellite terminal (Figure 1-1)

Figure Chapter 1-1. HPCST-5000/-7000, and HPKST-12000

Introduction High-Power TWTA Satellite Terminals

1–2 Rev. 1

1.1 Introduction

The key component of these high-power systems is the external high-power TWTA.When the TWTA is coupled with the CST-5000/-7000, and KST-12000 satellite terminalsystems, these components form an integrated high-power transceiver system. Theseall-weatherized units are designed for the harsh, uncontrolled, outdoor environmenttypical of antenna mounting. These completely integrated systems meet the requirementsfor private, regional domestic, and international C-band or Ku-band satellite networks.

All three products may be configured for single thread or 1:1 redundant systems.

Refer to Table Chapter 1-1 for a typical HPCST-5000 and -7000 redundant system.

Table Chapter 1-1. Major Assemblies of the HPCST-5000/-7000

Nomenclature DescriptionOutdoor Low-Noise Amplifier (LNA) Assy Consists of a transit reject filter, redundant LNAs

(65°K; 40°K Optional) and a C-Band waveguideswitch.

Outdoor HPCST-5000/HPCST-7000 RedundantAssy

Consists of two radio frequency terminals (RFTs)assemblies. Each RFT includes an up converterwith a 70 MHz IF input, a down converter with a70 MHz IF output, a monitor and control (M&C)microprocessor, and a power supply.

Outdoor high-power TWTA Redundant Assy(Figure Chapter 1-2)

Consists of two high-power TWTAs, a waveguideswitch, an output coupler, and a system cableharness with a customer-interface connector forsystem control.

HPS-1110 An optional indoor, rack-mounted, redundantTWTA controller. Allows the customer M&C ofTWTAA operations.

Redundancy Switch Unit (RSU) Along with a redundancy cable/hardware kit,provides the system with a single M&C interface,redundancy switchover, and cabling.

High-Power TWTA Satellite Terminals Introduction

Rev. 1 1–3

Figure Chapter 1-2. TWTA Redundant Assembly (Typical)

Refer to Table Chapter 1-2 for a typical HPKST-12000 redundant system.

Table Chapter 1-2. Major Assemblies of the HPKST-12000

Nomenclature DescriptionOutdoor LNA Assy Consists of a transit reject filter, redundant LNAs (120°K; 90°K

Optional) and aKu-Band waveguide switch. Optionally, a Ku-Band coaxialswitch, 1:4 power splitter, and frequency (block) converter areavailable.

Outdoor KST-12000 RedundantAssy

Consists of two RFT-12000 redundant assemblies. Each RFTincludes an up converter with a 70 MHz IF input, a downconverter with a 70 MHz IF output, an M&C microprocessor,and a power supply.

Outdoor TWTA Redundant Assy(Figure 1-2)

Consists of two high-power TWTAs, a waveguide switch, anoutput coupler, and a system cable harness with a customer-interface connector for system control.

HPS-1110 An optional indoor, rack-mounted, redundant TWTA controller.Allows the customer M&C of TWTAA operations.

Redundancy Switch Unit (RSU) Along with a redundancy cable/hardware kit, provides the systemwith a single M&C interface, redundancy switchover, andcabling.


1–4 Rev. 1

The system outdoor terminal components are weatherproof units for the uplink anddownlink requirements. The redundant assemblies have been designed for antenna orpole mounting. The system has a single customer interface connector for remote monitorand control.

The onboard microcomputer monitors and controls the operational parameters. ThisM&C system enables the user to locally or remotely control functions such as:

• Output power level• Output On/Off• Transmit/Receive channel frequency

The system also reports terminal configuration status, as well as fault status of allcomponents. The RFT can be initially configured by a keyboard/LCD controller withinthe enclosure, or by connection of a common ASCII/EIA-232 terminal connected to theserial port at the system interface connector (P1). A simple command set allowsconfiguration control and retrieval of status information.

If the customer M&C control unit is a more sophisticated monitor and control stationcomputer, the serial port can be set to EIA-485 for bus operation. A separate,rack-mounted, redundant controller for the TWTAs provides the user with control andstatus of the TWTA operation, as well as an automatic high voltage enable forswitchover.

Refer to Figure Chapter 1-3 for a system block diagram of the HPCST-5000/-7000redundant systems.

Refer to Figure 1-4 for a system block diagram of the HPKST-12000 redundant systems.


Rev. 1 1–5

Figure Chapter 1-3. HPCST-5000/7000 Redundant Terminal Systems BlockDiagram (Typical)

Figure Chapter 1-4. KST-12000 Redundant Terminal System Block Diagram (Typical)


1–6 Rev. 1

1.2 Component Descriptions

1.2.1 Low-Noise Amplifier (LNA) Assembly

A typical redundant LNA assembly consists of a transmit reject filter, waveguide switch,and two LNAs. Optionally, a coaxial switch, 1:4 power splitter, and a block converter areavailable.

For more information on the LNA assemblies, refer to the following manuals:

• CST-5000 C-Band Satellite Terminal Installation and Operation Manual• CST-7000 C-Band Satellite Terminal (Insat) Installation and Operation Manual• KST-12000 Ku-Band Satellite Terminal Installation and Operation Manual

1.2.2 Radio Frequency Terminal (RFT)

The RFT is a weatherproof enclosure which houses:

• Up and down converters• Frequency synthesizer• IF and RF interface• M&C system• Power supply• Cables

In the transmit (uplink) direction, the terminal accepts a 70 MHz IF signal and transmitsit in the uplink transmit frequency band. This output is coupled through a type Nconnector to the external TWTA assembly. This system provides the high-power outputto the antenna through a waveguide switch. A 40 dB coupler is included at the output ofthe waveguide switch to meet INTELSAT specifications.

A high-power termination is included on the offline channel port of the waveguideswitch for testing. Each redundant thread has been factory-compensated for TX gainstability over temperature. EFData recommends that when replacing a faulted unit, theRFT, TWTA, and associated coax link must be replaced as a set. Otherwise, gainstability can not be guaranteed.

In the receive (downlink) direction, the terminal accepts an RF signal in the downlinkfrequency band, and down-converts it to a 70 MHz IF output. The LNA assembly has anRF RX type N coax output to each RFT receive input.


Rev. 1 1–7

The RFT power level at 1 dB compression to drive the external TWTA is +8 dBm. Theup and down converters are dual conversion, and are configured with individualsynthesizers for independent transmit and receive transponder selection.

For more information on RFTs, refer to the following manuals:

• CST-5000 C-Band Satellite Terminal Installation and Operation Manual

• CST-7000 C-Band Satellite Terminal (INSAT) Installation and OperationManual

• KST-12000 Ku-Band Satellite Terminal Installation and Operation Manual

1.2.3 TWTA Models

The TWTA is an all-weather, high-power system specifically designed for compactoutdoor installation for earth station satellite communication. Because of thecompactness, the unit can be mounted on the antenna, thus reducing transmission lossesto the antenna feed. This outdoor unit contains:

• RF filters• Self-contained forced air cooling system• Control inputs• Monitor output signals

EFData offers six TWTA models that operate in the satellite earth station uplink bands.Specific models and options are identified by the EFData part number in Table 1-3.

Table Chapter 1-3. TWTA Models

Band Model # EFDataPart #

Frequency Rated RFPower (Min.)

C-Band HPA-500HPA-500HPA-700HPA-700

RF/XT-100CRF/XT-400CRF/XT-100CIRF/XT-400CI

5.845 to 6.425 GHz5.845 to 6.425 GHz7.9 to 8.4 GHz7.9 to 8.4 GHz

140W350W140W350W

Ku-Band HPA-1200HPA-1200

RF/XT-100KRF/XT-400K

14.0 to 14.5 GHz14.0 to 14.5 GHz

100W300W

Note: Manufacturing changes which do not impact component interchangability arereflected in the revision level of the power amplifier part number. EFData maintains aconfiguration log by serial number to track the applicable revision level for each poweramplifier. Please include the amplifier serial number when ordering parts or discussingthe amplifier with EFData representatives.

Prime input power to the unit is AC, as follows:

• 115 or 230VAC for the 100W unit


1–8 Rev. 1

• 100 to 260VAC for the 350W unit.• Refer to Figures 1-5 and 1-6 for block diagrams.


Rev. 1 1–9

R F IN P U TT YP E NFE M A LE

R F S A M P LET Y P E NF E M A L E

R F O U T P U TW AV E G U ID E

IS O LAT E R

*C A N D K u B A N D O N LY

H A R M O N ICF ILT E R

R E C E IV EB A N D

F ILT E R *

P O W E RM O N ITO RC O U P LE RT W T

Figure Chapter 1-5. 100W and 140W Unit Block Diagram

Figure Chapter 1-6. 300W and 350W Unit Block Diagram


1–10 Rev. 1

1.2.4 High-Power Controller (HPC)

The optional HPCs are indoor rack-mounted units used to monitor and control the statusof the TWTA units in the HPCST–5000/–7000, and HPKST–12000 high-power satelliteterminal systems.

1.2.4.1 HPC-1200

The HPC-1200 (Figure 1-7) is specifically designed to monitor and control a TWTA in asingle thread configuration. Refer to Figure Chapter 1-4 for a description of the HPC-1200.

Table Chapter 1-4. Description of the HPC-1200

Component DescriptionEFData Part No. RF/XCT-100Connector 25-Pin D output connector for integration with other M&C elements.Local Control Can provide local control at the HPC site, or control from a remote site through

a remote interface to the HPC.

This is a manual selection at the HPC site.Front Panel The front panel provides control switches and indicators, a rear panel of

discrete interface connections for the TWTA, and a remote interface controlconnector.

Figure Chapter 1-7. HPC-1200 Single Thread Controller


Rev. 1 1–11

1.2.4.2 HPC-1110

The HPC-1110 (Figure 1-8) is specifically designed to monitor and control a TWTAin a 1:1 redundant configuration. Refer to Table 1-5 for a description of the HPC-1110. Refer to Appendix A for programming guidelines.

Table Chapter 1-5. Description of the HPC-1110

Feature DescriptionEFData Part No. RF/XTC-111DAuto Mode For automatic operation when switched from offline to online system.Power Supply TWTA is power from an AC input.Control Interface The control interface from the TWTA to the HPC is parallel (discrete) signal

lines.Local Control Provides local control at the HPC site, or control from a remote site through a

remote control interface.

This is a manual selection at the HPC site.Panels The front panel provides control switches and indicators. A rear panel of

discrete interface connections for the TWTA, an interlock connector input, anda remote interface control connector. Also, an input is provided for thewaveguide switch position indicators. A fault indicator and fault reset isprovided for each channel.

TW TAPow er

HeaterStandby H V O N

P owerRemote

Local Manual

Automatic

Fault Reset Lamp Test

B

A

1 :1 C O N T R O L L E R

Figure Chapter 1-8. HPC-1110 1:1 Redundant Controller


1–12 Rev. 1

1.2.5 Redundant Switch Unit (RSU)

The RSU-503L (Figure 1-9) is an all-weather unit that provides for primary and backupoperation as a communications terminal.

The RSU is designed for mounting on either the antenna or support pole.

The RSU controls the switching from primary to backup service in a 1:1 redundantconfiguration.

For information on the RSU-503L, refer to the RSU-503 Redundancy Switch UnitInstallation and Operation Manual.

Figure 1-9. RSU-503L


Rev. 1 1-13

1.3 Equipment List

Refer to Table 1-6 through Table 1-10 for an equipment list for single thread andredundant systems.

Notes:1. These lists are subject to change without notice.2. Indented part numbers are subsets of higher level part numbers, and are shown

for reference only.

Table 1-6. HPCST-5000/-7000 Single Thread Systems Equipment List (Typical)

Description EFData Part Number NotesSingle CST-5000 System:

RFT-500 (No TWTA)RFT-700 (No TWTA)

Std Cable, ACStd Cable, DC

Univ Mounting Kit

.CST500....../.CST700........RFT500/........RFT700/.......KT/3272-1KT/3272-2KT/3576

optionoptionoptionoption

Single C-band LNA SystemLNA Assy, EFD Std CST

.CA.......

Single HPCST-5000/7000 SystemSingle HPCST-5000 System

Single System Cable HarnessWaveguide ABS 1:2 Ku-bandHPA-500/700 TWT AmplifierC-Band HPA TWTA 140WC-Band HPA TWTA 350WMounting Kit, HPA (C/KST)

HPC-1200

.HPCST500..../.HPCST700.....PL/5129

CA/5124KT/5115

.HPA500..../.HPA700.....RF/XT-100CRF/XT-400CKT/5032

RF/XTC-100

optionoption

option


Rev. 11-14

Table 1-7. HPCST-5000 and -7000 Redundant Systems Equipment List (Typical)

Description EFData Part Number Notes1:1 CST-5000/7000 System:

RFT-500 (No TWTA)RFT-700 (No TWTA)Univ Mounting KitRSU-503L

.REDCST500...../.REDCST700..........RFT500/A 00 1 2D 0.RFT700/A 00 1 1A 0KT/3577.RSU503L (AS/3000-1)

optionoption

1:1 LNA System:Plate Assy, RCST LNA

LNA Assy

.CSRED..........AS/3220

.CA......optionoption

1:1 HPCST-5000/7000 Cable/Hardware Kit:CBL/Hdw, R_CST, AC, 9m AntCBL/Hdw, R_CST, AC, Uplk, 4.6m Ant

(no dot code)KT/3107-7KT/tbd

optionoption

1:1 HPCST-5000/7000:1:1 High Power CSAT

Waveguide AssemblyWaveguide ABS 1:2 C-bandMounting, 1:1 HPWR C/KSATHPA-500/700 TWT AmplifierC-band HPA-500/140Wxtd_C-band HPA-700/140WC-band HPA-500/350Wxtd_C-band HPA-700/350W

.HPCST5000RED......./.HPCST7000RED......AS/5127

PL/5089KT/5115KT/5125

.HPA500..../HPA700......RF/XT-100CRF/XT-100CIRF/XT-400CRF/XT-400CI

optionoptionoptionoption

CBL/Hdw, RHPA, 115V, Uplink OnlyCable Harness, Uplnk, 4.6 AntPwr Cable, 115 VAC

KT/5249 -1CA/5248PL/5240-1

option

CBL/Hdw, RHPA, 230V1:1 Cable Harness, 9m AntPwr Cable, 230 VAC

KT/5249 -2CA/5122PL/5240

option

CBL/Hdw, RHPA, 230V1:1 Cable Harness, SysPwr Cable, 230 VAC

KT/5249 -3CA/5122-1PL/5240

option

CBL/Hdw, RHPA, 230V, Uplnk Only1:1 Cable Harness, 4.6m AntPwr Cable, 230 VAC

KT/5249-4CA/5248PL/5240

option

HPC-1110 RF/XTC-111D option


Rev. 1 1-15

Table 1-8. HPKST-12000 Single Thread System Equipment List (Typical)

Description EFData Part Number NotesSingle Thread KST-12000 System:

RFT-1200 (No TWTA)Std Cable/Hdw Kit, ACStd Cable/Hdw Kit, DCUniv Mounting Kit

.KST12000........RFT1200.......KT/3954-1KT/3954-2KT/3576

optionoptionoption

LNA SystemLNA Assy, EFD Std KST

.KA............option

Single HPKST-12000 SystemHPWR KST AssemblyWaveguide ABS 1:2 Ku-bandMounting Kit, TWTA (C/KST)HPA-1200 TWT Amplifier

Ku-band HPA-1200/125WKu-band HPA-1200/300W

CBL/Hdw, Single HPKSTCable Harness, SystemPwr Cable, 115 VAC

CBL/Hdw, Single HPKSTCable Harness, ? AntPwr Cable, 230V

HPC-1200

.HPKST1200....PL/5130KT/2820KT/5032

.HPA1200......RF/XT-100KRF/XT-400K

KT/_ _ _ _ - tbdCA/5124 - tbdPL//5240-1

KT/_ _ _ _ - tbdCA/5124 -tbdPL//5240

RF/XTC-100

optionoption

option

option

option


Rev. 11-16

Table 1-9. HPKST-12000 Redundant System Equipment List (Typical)

Description EFData Part Number Notes1:1 KST-12000 System: .REDKST12000.......

RFT-1200 (No TWTA) RFT1200/A 00 1 2D 1 optionUniv Mounting Kit KT/3577RSU-503L .RSU503L (PL/3000-1)

1:1 LNA System: .K1RED..........Plate Assy, Std. LNA AS/4386 option

LNA Assy. KA....Plate Assy, C03 LNA AS/3957 option

LNA Assy KA....Plate Assy, C11 LNA AS/5223 option

LNA Assy. KA....

1:1 HPKST-12000 Cable/Hardware Kits (no dot code)CBL/Hdw, R_C/KST, AC, 9mAnt KT/3950-5 optionCBL/Hdw, R_C/KST, AC, Uplk, 4.6m Ant KT/3950-6 optionCBL/Hdw, R_C/KST, AC, Uplk, 4.6m Ant KT/3950-8 option

1:1 High Power (HPKST-12000 System): .HPKST12000RED....1:1 High Power KST PL/5033

Waveguide Assembly PL/5088Waveguide ABS 1:2 Ku-band KT/2820Mounting, 1:1 HPWR C/KSAT KT/5125HPA-1200 TWT Amplifier .HPA1200.......

Ku-band HPA-1200/125W RF/XT-100K optionKu-band HPA-1200/300W RF/XT-400K option

CBL/Hdw, RHPA, 115V, Uplink Only KT/5249 -1 option1:1 Cbl Harness, Uplnk, 4.6 Ant CA/5248Pwr Cable, 115 VAC PL/5240-1

CBL/Hdw, RHPA, 230V KT/5249 -2 option1:1 Cable Harness, 9m Ant CA/5122Pwr Cable, 230 VAC PL/5240-1

CBL/Hdw, RHPA, 230V KT/5249 -3 option1:1 Cable Harness, Sys CA/5122-1Pwr Cable, 230 VAC PL/5240

CBL/Hdw, RHPA, 230V, Uplnk Only KT/5249-4 option1:1 Cable Harness, 4.6m Ant CA/5248Pwr Cable, 230 VAC PL/5240

HPC-1110 RF/XTC-111D option


Rev. 1 1-17

1.4 Specifications

1.4.1 System Interface

Table 1-10 lists the types of interface required for each system component.

Table 1-10. System Interfaces for System Components

Description TypeRFT-500, -700:

TX IF Input (J1)RX IF Output (J3)RX RF Input (J4, C-band)TX RF Output (J2, C-band)M&C Control (J6)

TNC female , 50Ω, VSWR 1.25:1 max.TNC female , 50Ω, VSWR 1.25:1 max.N, female, VSWR 1.25:1 max.N, female, VSWR 1.25:1 max.Circular, PT06E-16-26S

RFT-1200:TX IF Input (J1)RX IF Output (J3)RX RF Input (J4, Ku-band)TX RF Output (J2, Ku-band)M&C Control (J6)

TNC female, 50Ω, VSWR 1.25:1 maxTNC female, 50Ω, VSWR 1.25:1 maxN, female, VSWR 1.25:1 maxN, female, VSWR 1.25:1 maxCircular type, PT06E-16-26S

HPA-500, -700:RF TX Output (W/G Port)

RF RX Input (J3, C-band)RF TX Sample (J4, C-band)M&C Control (J2)

CPR-137G, VSWR:2.2:1 max. (for 140W), or 1.3:1 (for 350W)

N, female, VSWR: 1.3:1N, female, VSWR: 1.3:1; typical 42 dB couplerCircular, PT06E-18-32S

HPA-1200:RF TX Output (W/G Port)

RF RX Input (J3, Ku band)RF TX Sample (J4, Ku-band)M&C Control (J2)

WR-75 G, VSWR:2.2:1 max. (for 100W) or 1.3:1 (for 300W)

N, female, VSWR: 1.3:1N, female, VSWR: 1.3:1; typical 42 dB couplerCircular type, PT06E-18-32S

Redundant TWTA AssemblyCustomer Interface (P1) Circular type, PTO6E-20-41SLNA Assy.:

RF RX Input (W/G)

RF RX Output (2x)Block Converter Output1:1 Switch Control

CPR-229G, VSWR 1.25:1 max. (C-band)WR-75 G, VSWR 1.25:1 max (Ku-band)N, VSWR 1.25:1 max., femaleN, VSWR 1.3:1 max., femaleCircular, PT06E-14-19P

HPC-1110:ODU #1 M&C (J1)ODU #2 M&C (J2)Remote M&C (J3)W/G Switch #1External Interlock

D-type, 37 pin, femaleD-type, 37 pin, femaleD-type, 9 pin, femaleD-type, 15 pin, maleD-type, 15 pin, male

1:1 TWTA W/G Switch Control Circular, MS3116E-14-12P


Rev. 11-18

Table 1-10. System Interfaces for System Components (Continued)

Description TypeRSU-503L:

M&C for RFT #A (J4)IF RX Input (J2)IF TX Output (J1)M&C for RFT #B (J8)IF RX Input (J6)IF TX Output (J5)Remote M&C (J16)IF RX Output (J15)IF TX Input (J14)Waveguide Switch (J10)

Circular, PT06E-16-26STNC, femaleTNC, femaleCircular, PT06E-16-26STNC, femaleTNC, femaleCircular, PT06E-16-26STNC, femaleTNC, femaleCircular, PT06E-14-19S

1.3.2 Prime Power

Table 1-11 specifies the prime power specifications for each system component.

Table 1-11. Prime Power

Assembly Options Prime PowerRFT-500, -700 (J5) AC 90 to 230 VAC, 47 to 63 Hz, 1.0ARFT-1200 (J5) AC 90 to 230 VAC, 47 to 63 Hz, 1.0AHPA-500, -700 (J1):

140W350W

ACAC

Prime Power/Power Consumption115 or 230 VAC, ± 20%, 47 to 63 Hz, 950 VA100 to 230 VAC, 47 to 63 Hz, 1550 VA

HPA-1200 (J1):100 W300 W

ACAC

Prime Power/Power Consumption115 or 230 VAC, ± 20%, 47 to 63 Hz, 950 VA100 to 230 VAC, 47 to 63 Hz, 1550 VA

HPC-1110 AC 90 to 230 VAC, 47 to 63 HzRSU-503L (J4, J8) DC +10.8 VDC from either RFTLNA DC +10.8 ± 0.2 VDC as provided from RSU


Rev. 1 1-19

1.4.3 Performance

1.4.3.1 Receive

The receiver performance is defined for the LNA input to the 70 MHz output of the RFTunits.

Note: Intervening cable losses due to installation variables must be considered whencomparing the performance data listed in Table 1-12.

Table 1-12. HPCST-5000/-7000 Receive Characteristics

Receive CharacteristicsInput Frequency Range, RFT-500 3.625 to 4.200 GHz, in 2.5 MHz stepsInput Frequency Range, RFT-700 4.50 to 4.80 GHz, in 2.5 MHz stepsFrequency Sense No inversionInput Level -127 to -80 dBmRX Gain

Adj. (1 dB max. steps)95 dB min.0 to 15 dB min. (remotely controlled)

RX Freq. Stability ± 1 x 10-8 at 23°CLife RX Freq. Drift ± 1 x 10-7 at 23°CGain Flatness ± 1.0 dB/36 MHz

+0.5 dB/4 MHzRX IF Output Bandwidth 70 ± 18 MHz at 1 dBNoise Figure 65°K (other options available)Transmit Freq. Reject 60 dBReceive Image Rejection -45 dBcLinearity (Third Order Intercept) -30 dBc for 2 tones at -88 dBm (with LNA)Group Delay (any 36 MHz)

LinearParabolicRipple

IESS-309, Figure 3, < 10 ns0.28 ns/MHz0.025 ns/MHz2

< 5 ns P-PSynthesizer Lock Time < 1 secondPhase Noise(SSB) at:

10 Hz100 Hz1 kHz10 kHz100 kHz

(Maximum)-30 dBc/Hz-60 dBc/Hz-70 dBc/Hz-75 dBc/Hz-80 dBc/Hz

Spurious (signal related) at 0 dBm RX IFoutput

-40 dBc

Inband Overdrive No damage to 0 dBmThird Order Intercept +24 dBm minimumRX IF Output at 1 dB Compression +17 dBm minimum


Rev. 11-20

Table 1-12. HPKST-12000 Receive Characteristics (Continued)

Receive CharacteristicsInput Frequency Range 10.95 to 12.75 GHz

(2.5 MHz step size, 1.0 MHz option)Frequency Sense No inversionInput Level -127 to -80 dBmRX Gain

Adj (1 dB max steps)95 dB min0 to 15 dB min (remotely controlled)

RX Frequency Stability ± 1 x 10-8 at 23°CLife RX Frequency Drift ± 1 x 10-7 at 23°CGain Flatness ± 1.0 dB/36 MHz

± 0.5 dB/4 MHzRX IF Output Bandwidth 70 ± 18 MHz at 1 dBNoise Figure 120°K (options to 90°K)Transmit Frequency Reject 60 dBReceive Image Rejection -45 dBcLinearity

(Third Order Intercept) -35 dBc for 2 tones at -86 dBm pin (with LNA)Group Delay (any 36 MHz):


IESS-309, Figure 3, < 10 ns0.28 ns/MHz0.025 ns/MHz< 5 ns P-P

Synthesizer Lock Time < 1 secondPhase Noise (SSB) at:

10 Hz100 Hz1 kHz10 kHz100 kHz

Maximum-30 dBc/Hz-60 dBc/Hz-70 dBc/Hz-75 dBc/Hz-90 dBc/Hz

Spurious (signal related):at 0 dBm RX IF output -40 dBc

Inband Overdrive No damage to 0 dBmThird Order Intercept +24 dBm minRX IF Output:

at 1 dB Compression +17 dBm min


Rev. 1 1-21

1.4.3.2 Transmit

The transmit performance is the summation of the effects of the RFT and TWTA units.

Note: Intervening cable losses due to installation variables must be considered whencomparing the performance data listed in Table 1-13 through Table 1-16.

Table 1-13. HPCST-5000/-7000 Transmit Characteristics

Transmit CharacteristicsFrequency Range:

RFT-500RFT-700

5.845 to 6.425 GHz, in 2.5 MHz steps6.725 to 7.025 GHz, in 2.5 MHz steps

System Gain:140W System:

at 6 dB backoff, small signalat saturated pwr, large signal

350W System:at 6 dB backoff, small signalat saturated pwr, large signal

73 dB min.78 dB min.


TX IF Input Level Range -35 to -25 dBm typicalOutput Power at saturation:

170W TWT400W TWT

140W350W

TX IF Input Bandwidth at -1 dB 70 ± 18 MHzGain: Stability (over temp.)

FlatnessVariation

+1.5 dB (matched RFT with TWTA)± 1.5 dB/36 MHz+2.0 dB max.

Group Delay (any 36 MHz):LinearParabolicRipple

IESS-309, Figure 3, < 10ns0.28 ns/MHz0.15 ns/MHz2

< 5 ns P-PTX Freq. Stability ± 1 x 10-8

TX Synthesizer Lock-up time < 1 secondSpurious (not inter-mods):

at 6 dB backoff

with carrier off

Intermod Spurious with two equal carriersHarmonic (out of band)

IESS-309, Paragraph 3.2.1-40 dBc min. (≤ 2.048 MHz inform. rate)-50 dBc min. (> 2.048 MHz inform. rate)-24 dBm/4 kHz max. (anywhere in satellite band)

-22 dBc at 6 dB backoff-60 dBc at 6 dB backoff

TX Phase Noise(SSB) at:10 Hz100 Hz1 kHz10 kHz100 kHz

(Maximum)-30 dBc/Hz-60 dBc/Hz-70 dBc/Hz-75 dBc/Hz-80 dBc/Hz


Rev. 11-22

Table 1-14. HPA-500, -700 Transmit Characteristics

Transmit CharacteristicsTWT Rated Power 170W 400WRated Output Power at Flange:

Gain (minimum):Large signal (LSG)Small signal (SSG)

Maximum SSG Variation:Any 40 MHz bandIF full BandSlopeStability (24 hr)Stability, Temp

140W


1.0 dB max.2.5 dB max.0.04 dB/MHz max.± 0.25 dB max.± 1.0 dB max.

350W



Inter-modulation:(with two equal signals)

-18 dBc max. with two equal carriers at 4 dB total outputbackoff

Harmonic Output 60 dBc min.AM to PM Conversion 2.5°/dB at 6 dB below rated powerGroup Delay:

Linear (LDD)Parabolic (PDD)Ripple

(any 40 MHz)0.01 ns/MHz0.005 ns/MHz2

≤ 0.5 ns p-pNoise Power:

Transmit bandReceive band

-80 dBW/4 kHz-160 dBW/4 kHz


Residual AM Noise -50 dBc to 10 kHz-20 (1.5 + logf) dBc to 500 kHz-85 dBc above 500 kHz

Phase Noise 10 dB below IESS phase noise profileAC fundamental -50 dBcSum of all spurs -47 dBc


Rev. 1 1-23

Table 1-15. HPKST-12000 Transmit Characteristics

Transmit CharacteristicsFrequency Range, RFT-1200 14.0 to 14.5 GHz

(2.5 MHz step size, 1.0 MHz option)Output Power at Saturation:

125W TWT350W TWT

100W300W

TX IF Input Level Range -35 to -25 dBmSystem Gain:



72 dB min77 dB min

78 dB min82 dB min

TX IF Input Bandwidth at -1 dB 70 ± 18 MHzGain Stability (over temp):

FlatnessVariation

± 1.5 dB (matched RFT with TWTA)± 1.5 dB/36 MHz± 2.0 dB max

Group Delay (any 36 MHz):LinearParabolicRipple

IESS-309, Figure 3, < 10 ns0.28 ns/MHz0.15 ns/MHz≤ 5 ns p-p

TX Frequency Stability ± 1 x 10-8

TX Synthesizer Lock-up Time < 1 secondSpurious (not inter-mods):

at 6 dB backoff

with carrier off

IESS-309, Paragraph 3.2.1-40 dBc min (≤ 2.048 MHz inform rate)-50 dBc min (> 2.048 MHz inform rate)-24 dBm/0.4 kHz max (anywhere in satellite band)

Intermod Spurious:with two equal carriers

Harmonic (out of band)-22 dBc at 6 dB backoff-60 dBc at 6 dB backoff

TX Phase Noise (SSB) at:10 Hz100 Hz1 kHz10 kHz100 kHz

Maximum-30 dBc/Hz-60 dBc/Hz-70 dBc/Hz-75 dBc/Hz-80 dBc/Hz


1-24 Rev. 1

Table 1-16. HPA-1200 Transmit Characteristics

Transmit CharacteristicsTWT Rated Output Power 125W 350WRated Output Power at Flange

Gain (minimum):small signal (SSG)large signal (LSG)

Maximum SSG VariationAny 80 MHz bandFull BandSlopeStability (24 hr.)Stability, Temp

100W



300W



Intermodulation: (with two equal signals)

-18 dBc max. with two equal carriers at 4 dB total outputbackoff

Harmonic Output -60 dBc max.AM to PM Conversion 2.5°/dB at 6 dB below rated powerGroup Delay:


(any 80 MHz)0.02 ns/MHz0.005 ns/MHz2

≤ 1 ns p-pNoise Power:

Transmit bandReceive band



Residual AM Noise -50 dBc to 10 kHz-20 (1.5 + logf) dBc to 500 kHz-85 dBc above 500 kHz

Phase Noise 10 dB below IESS phase noise profileAC fundamental -50 dBcSum of all spurs -47 dBc


Rev. 1 1-25

1.4.4 Environment

Note: RFT and TWTA are considered Outdoor Units (ODUs) and will appear as suchthroughout this manual.

The maximum environmental conditions applicable to the ODUs are listed in Table 1-17.

Table 1-17. ODU Environmental Specifications

Environment ConditionsTemperature -40° to +50°C operating

-50° to +70°C survival, non-operatingVibration 1.5g, 5 to 200 Hz and normal transportation levelsShock 6g max.Humidity 0% to 100% relative at -40° to +50°C

95% at 65°C for 72 hrs.Precipitation MIL-STD-810/Method 506.2Salt Fog MIL-STD-810/Method 509.2Sand and Dust MIL-STD-810/Method 510.1Altitude:

OperationalSurvival

0 to 10,000 ft.0 to 40,000 ft.

Solar Radiation 360 BTU/hr/ft2 at 50°CSafety TBDEmissions TBDES Discharge 10 kV operation, 15 kV survival

Note: HPCs are considered indoor units (IDUs) and appear as such throughout thismanual.

The maximum environmental conditions applicable to the IDUs are listed in Table 1-18.

Table 1-18. IDU Environmental Specifications

Environment ConditionsTemperature 0° to +50°C operating

-10° to +70°C survivalVibration and Shock Normal transportation levelsHumidity 0% to 75% relative +50°C operating

95% at 50°C for 72 hr. non-operatingAltitude 0 to 10,000 ft.Safety TBDEmissions FCC Part 15, J, Class A


1-26 Rev. 1

1.4.5 Monitor and Control

The HPCST-5000/-7000, and HPKST-12000 systems have a single interface connector(41-pin connector) located on the TWTA redundant assembly. This interface providesthe customer with control of the ODU redundant assemblies through the integratedsystem wire harness.

Refer to Table 1-19 for customer control mechanism options that can be connected to theP1 connector.

Table 1-19. Monitor and Control

System Type Interface M&C OptionsCST-5000, -7000, orKST-12000 Redundant Assy.

EIA-232/EIA-485serial bus

Keypad or System Controller (customer providedPC) through a customer interface connector (P1)located on the TWTA redundant assembly.

HPA-500, -700, or -1200Redundant Assy.

Discrete I/O Hard-wired at P1, from an HPC-1110 controller,or from a System Controller (customer-provided)connected to P1.


Rev. 1 1-27

1.4.6 Physical Size and Weight

The physical size and weight of the system components are listed in Table 1-20.

Table 1-20. Physical Size and Weight Characteristics

Component Maximum Size and Weight, Inches Maximum Size and Weight, MetricsRFT-500, -700, -1200:

Single ThreadRedundant

23” L x 9.3” W x 10.3” H, 40 lb. max.Not Specified

58.42 x 23.6 x 26.16 cm; 18.1 kg

HPA-500, -700:Single Thread:

140W350W

Redundant:140W350W

16” L x 8.6” W x 9” H, 45 lb.21” L x 10.3” W x 11” H, 55 lb.

(includes W/G components and switch)32” L x 32” W x 12” H, 95 lb.32” L x 36” W x 15” H, 160 lb.

40.63 x 21.84 x 22.86 cm; 20.41 kg53.34 x 26.16 x 27.94 cm; 24.95 kg

81.28 x 81.28 x 30.48 cm; 43.1 kg81.28 x 91.44 x 38.1 cm; 72.57 kg

HPA-1200:Single Thread:

100W300W

Redundant:100W300W

16” L x 8.6” W x 9” H, 45 lb.21” L x 10.3” W x 9” H, 55 lb.

32” L x 32” W x 12” H, 95 lb.32” L x 32” W x 15” H, 150 lb.

40.63 x 21.84 x 22.86 cm; 20.41 kg53.34 x 26.16 x 22.86 cm; 24.95 kg

81.28 x 81.28 x 30.48 cm; 43.1 kg81.28 x 91.44 x 38.1 cm; 68.04 kg

HPC-1200 19” L x 18” W x 3.5” H, TBD lb.(w/brackets)

48.26 x 45.72 x 8.89 cm

HPC-1110 19” L x 6.6” W x 1.6” H, TBD lb.(w/brackets)

48.26 x 16.76 x 4.064 cm

RSU-503L 8” L x 11” W x 8” H, 7.5 lb. 20.32 x 27.94 x 20.32 cm; 3.40 kgLNA Assy. (Dual):

C-BandKu-Band

26” L x 21” W x 14” H, 20 lb.12” L x 7.1” W x tbd H, TBD lb.

66.4 x 53.34 x 35.56 cm; 9.072 kg30.48 x 18.03 cm


1-28 Rev. 1

Refer to Figure 1-11, 1-12, and 1-13 for unit envelope. All dimensions are in inches,centimeters are listed in parenthesis.

10.25(26.05)

10.60(26.92)

20.50(52.07)

M AX

7.53(19.13)

Figure 1-11. TWTA Outline Drawing (Typical)


Rev. 1 1-29

T W TA C O N T R O L L E RGND +15VDC HE LIX

CURRENTHV

M ONITORTEMP

ANALO G

EX TERNALINTERLOCK

POW ERON

HIGHV OLTAGE

STANDBY

FAULTS S TATUS

TEMP BEAMSE LE CTED ON

HELIXARC

FTDFANLOCK

HV ONSUM MARYFAULT

FAN ONLAM P TEST

ON

LOCAL

REMOTE

HEATERS TANDBY

ON

HIGHVOLTAGE

ACPOW ER

O N

48.26 cm(19 .00 in.

)

4 .09 cm(1 .61 in.

)

16.61 cm(6.54 in.

)

Figure 1-12. HPC-1200 Outline Drawing


1-30 Rev. 1

(43.18)1 7 .0 in .

1(48.26)

9 .0 in.

18 .0 in .

TWTAPower

HeaterS tandby HV ON

PowerRemote

Loc al Manual

Automatic


B

A

1 :1 C O N TR OLL E R

(45.72)

3.35 in.(8.50)


Rev.1 2–1

22Chapter 2. SINGLE THREAD SYSTEM

INSTALLATION

This chapter provides installation instructions for the HPCST-5000/-7000, and KST-12000 high-power satellite terminals in a single thread system configuration. Forinstallation instructions for related system components (RFT and LNA), refer to theappropriate manual:


• CST-7000 C-Band Satellite Terminal (Insat) Installation and Operation Manual


WARNING

High Voltage Hazards:The TWTA utilizes high voltage that can be lethal if contacted. TheTWTA should not be operated without its cover unless the user isthoroughly familiar with its operation and experienced with highvoltage.

RF Radiation Hazards:Prior to operation of the TWTA, ensure that all microwave connectionsare securely fastened. Check that there is no microwave leakage fromthem. Never operate the TWTA with an open waveguide. This amplifieris capable of generating high power microwave radiation, which cancause bodily harm.

Safety Summary:Equipment of this nature has inherent hazards. Operator or servicetechnicians should have training on the TWTAs. When the TWTA’scover is removed, the high voltage power supply for the TWT hasmultiple exposed high voltage points. Use extreme care when operatingthe amplifier with its cover removed.

Single Thread System Installation High-Power TWTA Satellite Terminals

2–2 Rev.1

2.1 Unpacking

The TWTA is packaged in preformed, reusable foam inside a cardboard carton.

Before unpacking the carton components, ensure that there is plenty of room around thecarton for workspace. A large table is recommended.

To remove the parts:

1. Cut the tape at the top of the carton where it is indicated OPEN THIS END.

2. Lift out the cardboard/foam spacer covering the unit.

3. Remove each part from the carton. Refer to Section 2.2.1 for a parts breakdown.

CAUTION

Because the TWTA is heavy, assistance may be necessary to removethe unit from the box.

Note: Save the packing material for reshipment.

High-Power TWTA Satellite Terminals Single Thread System Installation

Rev.1 2–3

2.2 Inspecting the Equipment

1. Carefully check the equipment for damage incurred during shipment.

2. Carefully check the equipment against the packing list shipped with theequipment to ensure that the shipment is complete. Refer to the followingparagraphs.

2.2.1 Included Parts

A typical single thread TWTA configuration contains the following components.

Notes:1. Parts are not drawn to scale.2. Because each system can be custom ordered, it is beyond the scope of this

manual to provide the unlimited configuration possibilities.

Qty. Description Qty. Description1 TWT amplifier. 1 High-power TWTA Satellite Terminals

Installation and Operation Manual.

1 Envelope containing the test data.

Notes:1. C-Band TWTAs (HPA-500/-700) utilize waveguide kit KT/5115.2. The Ku-Band TWTA (HPA-1200) utilizes waveguide kit KT/2820.


2–4 Rev.1

1 C-band waveguide connector kit (EFData Part # KT5115), which includes:

Qty. Description Qty. Description1 Gasket —full.

EFData Part # FP/5195.

1 Gasket — half-thickness.

EFData Part # HW/GKT-CPR137G.8 10-32 x 1” bolt.

EFData Part # 03P1097.

16 #10 flat washer.

EFData Part # HW/10-FLT.

8 1/4” split lockwasher.

EFData Part # HW/10-SPLIT.

8 10-32 hex nut.

EFData Part # HW/10-32HEXNUT.

1 Ku-band waveguide connector kit (EFData Part # KT/2820), which includes:

Qty. Description Qty. Description2 O-Ring, -024, BUNA, black.


2 O-Ring, black neoprene.

EFData Part # 32P1039.8 6-32 x 7/8” socket head cap screw.

EFData Part # HW/6-32X7/8SHCS.

16 #6 flat washer.


8 #6 split lockwasher.


8 6-32 hex nut.



Rev.1 2–5

1 Cable kit (EFData Part # KT/5499), which includes:

Qty. Description Qty. Description1 Cable assembly.

EFData Part # PL/2754.

1 Cable assembly.


1 Plug, dead front, 250V, 15 amp, 3-wire.

EFData Part # PP/AC-5666VY.

1 Cable-Male to Male Heliax 12 ft.

EFData Part # CA/3722-1.

1 Conn., 26 Pin, Circular, Female, Wall Mnt.w/seal.

EFData Part # CN/PT00E16-26S.


2–6 Rev.1

1 Hardware kit (EFData Part # KT/5032), which includes:

Qty. Description Qty. Description4 Unistrut — 14” long.

EFData Part # FP/3595.Used for round and square pole mount only.

4 5/16-18 x 1” bolt.

EFData Part # HW/5/16-18X1BLT.

8 Pipe block.

EFData Part # HW/BLK-PIPE2-8.Used for round pole mount only.


EFData Part # HW/5/16-SPLIT.

4 Threaded rod, 5/16-18 x 14”.

EFData Part # HW/RD5/16-18X14.Used for round and square pole mount only.

24 5/16” flat washer.

EFData Part # HW/5/16-FLT.8 Flat fitting plate, 5/16”.

EFData Part # HW/FIT-PLT-5/16.

16 5/16-18 hex nut.

EFData Part # HW/5/16-18HEXNT.

16 5/16-18 spring nut.

EFData Part # HW/5/16-18SPNUT.

2 Spar support bracket.

EFData Part # FP/3175.Used for spar mount only.

2 Unistrut — 8” long.

EFData Part # FP/3481-1.Attaches directly to TWTA.

8 5/16-18 x 1.25” bolt.

EFData Part # HW/5/16-18X1.25.


Rev.1 2–7

2.3 TWTA Installation

At the customer’s discretion, the TWTA can be installed anywhere on or near theantenna. The supplied hardware allows the installer a wide range of installationalternatives, including:

• Vertical pole (e.g., mast) (either square or round). This is the most typicalinstallation.

• Within the hub of a large antenna.

EFData recommends that the TWTAs be mounted vertically.

Note: A clearance of 2” (5.08 cm) is required for the air inlets and exhaust ports. If theTWTA is mounted in an enclosed chamber, duct the exhaust air to the outside of thechamber. Do not re-circulate the exhaust air back into the TWTA. Use an exhaust ductthat is slightly larger than the exhaust port of the TWTA and one that has smooth bendsand transitions.


2–8 Rev.1

2.3.1 Tools Required

Qty. Description1

1

1

1

3/8” drive ratchet.

3” x 3/8” drive extension.

7/16” x 3/8” drive socket. (Metric equivalent: 12mm, 6 pt.)


1 1/2” combination wrench. (Metric equivalent: 13mm combination wrenchwith a 6 pt. box end.)

1 7/64” hex key (Allen wrench). (No metric equivalent.)

1 5/16” combination wrench. (Metric equivalent: 8mm combination wrenchwith a 6 pt. box end.)


Rev.1 2–9

2.3.2 Vertical Pole Installation

2.3.2.1 Round Pole

Note: The following process is for a typical installation. Custom systems may beordered, and are not included in this manual.

To install the TWTA to a round vertical pole:

1. Set the unit on its side, with the mounting holes facing up.

2. Install the two 14” unistruts as follows:

a. Position a 14” unistrut (with the open side facing up) over one set of themounting holes on the TWTA.

b. Using four 5/16-18 bolts, 5/16” split lockwashers, and 5/16” flat washers,and 5/16-18 nuts, attach the 14” unistrut to the TWTA.

Tighten the bolts firmly.

c. Repeat Steps 2.a. and 2.b. for the second 14” unistrut.

3. Install the pipe blocks as follows:

a. Install two spring nuts in each of four 14” unistruts (the two just mounted onthe TWTA, and two additional).

Be sure to position the spring nuts in the unistruts wide enough apart so thatwhen the pipe blocks are installed, they will clear the pole when the unit islifted into place for installation.

b. Install each spring nut as follows:

(1) Place the spring nut in the unistrut channel, spring side down, with itswide side parallel with the unistrut channel.

(2) Press down on the spring nut to compress the spring, and rotate the nut90° (i.e., perpendicular to the unistrut).


2–10 Rev.1

(3) Release pressureon the spring nut.

(4) Repeat Steps3.b.(1) through3.b.(3) for eachspring nut.

c. Using four 5/16-18bolts, 5/16” splitlockwashers, and 5/16”flat washers, looselysecure the pipe blocksto the spring nuts.

Ensure the pipe blocksare installed with thelong angle facinginward, toward thepipe, as illustrated.

Note: DO NOTtighten the pipe blockbolts until aftermounting the TWTAon the vertical pole.(See Step 5.e.)


Rev.1 2–11

4. Install the threaded rods as follows:

a. Install two spring nuts in both 14”unistruts mounted on the TWTA.

Note: Ensure the spring nuts arepositioned over the outer holes in the14” unistruts, as illustrated.

b. To install each spring nut:

(1) Place the spring nut in theunistrut channel, spring sidedown, with its wide side parallelwith the unistrut channel.

(2) Press down on the springnut to compress the spring, androtate the nut 90° (i.e.,perpendicular to the unistrut).

(3) Release pressure on the spring nut.

(4) Repeat Steps 4.b.(1) through 4.b.(3) for each spring nut.

c. Thread a 5/16-18 nut approximately 1-1/2” onto each threaded rod. (Thiswill ensure that the threaded rods will extend beyond the spring nuts wheninstalled.)

d. Place a 5/16” splitlockwasher, 5/16” flatwasher, and flat fittingplate over eachthreaded rod.


2–12 Rev.1

e. One threaded rod at a time, hold thewashers and plate in place on the rod,and screw the rod into a spring nut, asillustrated.

Notes:1. Be sure to position the flanges

of the flat fitting plates in thegrooves of the unistruts.

2. Before tightening the nuts onthe threaded rods, ensure thatthe end of each rod is screwedin until it is flush with thebackside of the unistruts. Thisensures the rods are threadedcompletely through the springnuts.

Tighten each nut firmly.

f. Thread a 5/16-18 nut about 2” onto theend of each threaded rod.

g. Slip a 5/16” split lockwasher, 5/16” flatwasher, and flat fitting plate (in thatorder) onto each threaded rod.

5. Mount the TWTA as follows:

a. Lift the TWTA into position on thevertical pole.

b. Slip a 14” unistrut over each of pair ofthreaded rods (upper and lower).

Note: Install the 14” unistruts with the open face toward the pole, asillustrated below.


Rev.1 2–13

c. Install a 5/16” flatwasher, 5/16” splitlockwasher, and 5/16-18 nut on eachthreaded rod.

d. Position the TWTA asdesired, and tightenthe 5/16-18 nutsinstalled in Step 5.c.

e. Slide the pipe blocksinward until theycontact the verticalpole, then firmlytighten the 5/16-18bolts.

2.3.2.2 Square Pole

For square vertical pole installation, follow the steps in Section 2.3.2.1, with thefollowing exceptions:

• Do not perform Step 3.• Do not perform Step 5.e.


2–14 Rev.1

2.3.3 Spar Installation

Note: The following process is for a typical installation. Custom systems may beordered, and are beyond the scope of this manual.

Figure Chapter 2-1 shows a typical spar-mounted TWTA.

Figure Chapter 2-1. Typical TWTA Spar Installation

To install the TWTA to a spar:

1. Set the unit on its side, with the mounting holes facing up.

2. Install the 8” unistruts as follows:

a. Position an 8” unistrut (with the open side facing up) over one set of themounting holes on the TWTA.

b. Using four 5/16-18 bolts, 5/16” split lockwashers, 5/16” flat washers, and5/16-18 hex nuts, attach the 8” unistrut to the TWTA.


c. Repeat Steps 2.a. and 2.b. for the second 8” unistrut.


Rev.1 2–15


a. Position a spring nut between theinner and outer bolts on both sidesof each 8” unistrut, as illustrated.

b. Install each spring nut as follows:

(1) Place the spring nut in theunistrut channel, spring sidedown, with its wide sideparallel with the unistrutchannel.

(2) Press down on the spring nutto compress the spring, androtate the nut 90° (i.e.,perpendicular to the unistrut).

(3) Release pressure on thespring nut.

(4) Repeat Steps 3.b.(1) through3.b.(3) for each spring nut.

c. Lift the TWTA into position.

d. Using four 5/16-18 bolts, 5/16”split lockwashers, and 5/16” flatwashers, bolt the two spar supportbrackets in place.



2–16 Rev.1

2.3.4 External Connections

Connections between the TWTA and other equipment are made through five connectors.These connectors are listed in Table Chapter 2-1, and their locations are shown in FigureChapter 2-2 and Figure Chapter 2-3.

The use of each connector is described in the following paragraphs.

Table Chapter 2-1. External Connections

Name Ref.Design.

ConnectorType

Function

MONITOR ANDCONTROL

J1 PT06E-18-32S (SR) Remote interface

POWER J2 T3109-013 Prime power:115 VAC; 230 VAC, 47 to 63 Hz

RF INPUT J3 N, female TX RF input, 50Ω input impedanceRF SAMPLE J4 N, female Calibrated referenceRF OUT J5 WR-75G TX RF output:

C-band (5845 to 6425 MHz)Extended C-band (6725 to 7025 MHz)Ku-band (14.0 to 14.5 GHz)

Figure Chapter 2-2. 100W and 140W TWTA External Connections


Rev.1 2–17

R F O U T

A IR E X H A U S T A IR IN LE T

P O W E R M O N ITO RA N D C O N TR O L

R F IN P U T(TY P E N )

R F S A M P LE(TY P E N )

M O U N T IN G H O LE SM O U N TIN G H O LE S

Figure Chapter 2-3. 300W and 350W TWTA External Connections


2–18 Rev.1

2.3.4.1 TWTA Monitor & Control (J1)

The TWTA is controlled using a discrete signal type interface. Table Chapter 2-2 liststhe pinouts for the 32-pin M&C connector.

Table Chapter 2-2. TWTA Monitor & Control Pinouts

Type Pins FunctionsControl Commands

(All active low)

aFJXZ

AC Power ONHigh Voltage EnableHeater StandbyFault ResetControl Common (TWT GND)

Status Indicators, digital outputs

(unless specified, all active low)

ACGHKMRSTUW

Helix/Arc Fault LatchedHelix/Arc/FaultHeater Timer CompleteTWT Temperature FaultHigh Voltage ONFan ONHigh Voltage FaultEXT Fault (Active = High)Summary FaultFan LockStatus Return (Floating Common)

Status Indicators, analog outputs bDLNP

ReservedHelix CurrentHigh Voltage MonitorVDC/Analog Return (TWT GND)TWT Temperature

Output Voltages(power on indicator)

E

VB

+15 VDC (100 mA max.)

+24 VDC (100 mA max.)Chassis Ground

Ext. Voltage Input Y +5/15 VDC external supply input

Notes:1. AC Power ON (Pin A) — Connect to ground (Pin Z) to apply power to unit.2. High Voltage Enable (Pin F) — Connect to ground (Pin Z) to turn high

voltage ON.3. Heater Standby (Pin J) — Connect to ground (Pin Z). The HV Enable

command overrides this command when enabled. If the HV Enable isremoved, TWT will return to a reduced TWT heater voltage.

An external control and monitor device may be connected to the TWTAs for operation ofthe power amplifier. The optional EFData HPC-1200 controller can be used for thispurpose.


Rev.1 2–19

There are five classes of interfaces (Figure Chapter 2-4):

• Controls• Digital Status Circuits• External Voltage Circuit• Analog Status Circuits• Output Voltage Circuits

Each class will be described in more detail in the following paragraphs.

Figure Chapter 2-4. Interface Connector Pinouts


2–20 Rev.1

2.3.4.1.1 Control Interfaces

There are five control inputs as follows:

• AC Power ON (Pin a).Connect Pin a to ground (Pin Z) to enable operation of the amplifier and turn theTWT heater on.

CAUTION

The AC control circuit does not affect the connection of the poweramplifier to prime power. Disconnect Prime Power when the poweramplifier is serviced.

• High Voltage Enable (Pin F).Connect Pin F to ground (Pin W) to turn high voltage on.

• Heater Standby (Pin J).Connect Pin J to ground (Pin W) to reduce the voltage applied to the TWTheater. This feature is provided to extend the life of the TWT when the amplifieris the back-up unit in a redundant configuration. The High Voltage ON overridesthe Heater Standby command and returns the TWT heater voltage to normaloperating value.

• Fault Reset (Pin X).Momentarily connect Pin X to ground (Pin W) to reset the high voltage fault andhelix current fault.

Note: Turning the High Voltage OFF will also clear these faults.

• AC Command Return (Pin Z).Common return.

The external control inputs require +15 VDC pull-up. This is possible from the internal+15 VDC of the amplifier or from an external DC supply. Both configurations aredescribed in the following paragraphs.

• Using the Internal +15 VDC for Control, connect pin E to pin Y.

• Using an External DC Supply for Control, connect pin Y to external +15Vsource and source return to pin W.

Note: The EFData system harness is pre-wired to use the +15V output of the TWTA asthe input to the control pull-ups.


Rev.1 2–21

2.3.4.1.2 Digital Status Circuits

The digital status interface circuits are isolated outputs that require an internal +15 VDCsupply or an external supply to bias the digital status indicator circuits. This isaccomplished in the same manner as the control inputs by either connecting pin Y to pinE, or applying an external supply to pin Y.

The term “Active = low” is used in the following paragraphs to indicate when acondition is true and the status indicator is active (e.g., the photo-diode is conducting).Except for Control/Status Return, all circuits have a maximum open voltage of 20V, andmaximum switched current is 3 mA. Switches are isolated photo-couplers.

• Helix/Arc Fault Latched (Pin A). (Active = low.)When active, indicates there is a helix/arc fault within the amplifier whenPin A (+) is connected by open collector to ground (Pin W). After threesuccessive helix/arc faults, the automatic cycle is terminated and this line isactive (low).

• Helix/Arc Fault (Pin C). (Active = low.)When active, indicates there is a helix/arc fault within the amplifier whenPin C (+) is connected by open collector to ground (Pin W).

Note: The amplifier will try to reset itself in the event of a helix/arc fault. Thisline will “flash” during each reset cycle.

• Heater Timer Complete (Pin G). (Active = low.)When active, indicates the heater delay is in progress when Pin G (+) isconnected to by open collector to ground (Pin W).

• TWT Temperature Fault (Pin H). (Active = low.)When active, indicates there is a TWT Temperature fault within the amplifierwhen Pin H (+) is connected by open collector to ground (Pin W). This is not alatched fault. The amplifier automatically powers on once the TWT has cooledto an acceptable temperature.

A TWT Temperature fault may occur from a number of causes:

! Air intake filter clogged! Cooling fins clogged! Fan failure! Fan power supply failure

• High Voltage ON (Pin K). (Active = low.)When active, indicates that the amplifier is on when Pin K (+) is connected byopen collector to ground (Pin W).


2–22 Rev.1

• Fan ON (Pin M). (Active = low.)When active, indicates that the amplifier’s main cooling fan is on whenPin M (+) is connected by open collector to ground (Pin W). The main coolingfan is controlled by the temperature of the TWT. The fan will cycle on and off incooler ambient conditions. The fan is typically operated below themanufacturer’s nominal design voltage.

• High Voltage Fault (Pin R). (Active = low.)When active, indicates there is a high voltage fault within the amplifier whenPin R (+) is connected by open collector to ground (Pin W). A high voltage faultis typically an indication of a serious power supply failure.

• Summary Fault (Pin T). (Active = low.)When active, indicates there is a fault within the amplifier when Pin T (+) isconnected by open collector to ground (Pin W).

• Fan Lock (Pin U). (Active = low.)When active, indicates that the fan is locked when Pin U (+) is connected byopen collector to ground (Pin W). A Fan Lock signal is caused by fan failure oran object interfering with fan rotation.

• Control/Status Return (Pin W).Common return.

• External Fault (Pin S). (Active = high.)When active, indicates there is a fault within the amplifier. Pin S opens (opencollector) to high impedance.


Rev.1 2–23

2.3.4.1.3 Analog Status Circuits

• Helix Current (Pin D).The TWT helix current may be determined by monitoring the voltage in Pin D.There is 2 mA of current for each volt measured.

• High Voltage Monitor (Pin L).The high voltage level may be determined by monitoring the voltage in Pin L.This output is proportional to the high voltage (1V/1000 VDC).

• Analog Signal Return (Pin N).Common return.

• TWT Temperature (Pin P).The TWT’s collector temperature may be determined by monitoring the voltageon Pin P and referring to the chart in Figure Chapter 2-5.

Figure Chapter 2-5. TWT Temperature: Temperature vs. Voltage


2–24 Rev.1

2.3.4.1.4 Output Voltage Circuits

+15V (Pin E) 15V DC at 100 mA is available for external use or forpowering the pull-up resistors for the control and statussignals (Pin Y).

+24V (Pin V) 24V DC at 100 mA is available for external use.

2.3.4.1.5 Control/Status Ground Isolation

Refer to Figure Chapter 2-4 for pinout information. For instructions where M&C groundisolation is not required, the internal +15 VDC supply voltage can be used to power thecontrol and status line.

Use the internal supply as follows:

1. Connect Pin Y (External Voltage) to Pin E (+15 VDC).2. Connect Pin W (Control/Status Return) to Pin N (Analog Signal Return).

Note: For installation where M&C ground is required, or where long cables must be usedin an electrically noisy environment, an external supply can be used to power the controland status lines.

Use an external supply to fully isolate the M&C grounds as follows:

1. Connect Pin Y to an external supply voltage (+5 VDC minimum, +15 VDCmaximum).

2. Connect Pin W to the external supply return.

Note: The EFData system harness is pre-wired and has no special control/status groundisolation required.


Rev.1 2–25

2.3.4.2 TWTA Prime Power (J2)

2.3.4.2.1 Prime Power

As shown in Table Chapter 2-1, two prime power options are available. Depending onthe power amplifier, refer to Table Chapter 2-3. The locations of the prime power inputconnector are shown in Figures 2-2 and 2-3.

CAUTION

1. Be certain that the AC voltage cable has three wires, where the third wireis a safety ground.

2. An AC switch must be installed external to the amplifier to controlapplication of prime power to the amplifier. When the controller isdisconnected or set to AC Off, prime power is still present in the interiorof the amplifier (ODU). Disconnect prime power before servicing theunit.

3. The amplifier shall be securely grounded for personnel and equipmentsafety.

Table Chapter 2-3. Prime Power

AC Prime Power,115/230 VAC, SinglePhase

The HPA-500 and -700 are designed to operate from 115 VAC, ± 20%, or from 230 VAC, ± 20%. The HPA-1200 is designed tooperate from 230 VAC, ± 20% only.

Voltage range is selected by connection to the pins of the ACpower cable. Single phase AC power pinouts are shown insummary form in Figure 2-6.

115 VAC Operation For 115 VAC operation (100W models only), connect the “hot”lead to Pin 3, the neutral lead to Pin 2, and the ground lead to Pin PE.

230 VAC Operation For 230 VAC operation (100W or 300W models), connect oneAC lead to Pin 1, the other AC lead to Pin 3, and the ground leadto Pin PE.

Grounding Operation of the TWTA from a 115V or 230 VAC source isstandard with the following connections. The mating connector(Table 2-4) for AC unit is an Amphenol T3109-013.


2–26 Rev.1

Table Chapter 2-4. Mating Connector for ACUnit

Pin # 115V Operation 230V Operation1 N/C 230 VAC2 Neutral N/C3 115 VAC 230 VAC

PE Ground Ground

Figure Chapter 2-6. Single Phase AC Power Connections

2.3.4.3 RF TX Input (J3)

The RF TX input is a type N female connector that comes from the RFT. The inputimpedance is 50Ω.

The input frequency is determined by the type of installation:

• C-band (5845 to 6425 MHz)• Extended C-band (6725 to 7025 MHz)• Ku-band (14.0 to 14.5 GHz)


Rev.1 2–27

2.3.4.4 RF TX Sample (J4)

A sample port (type N female connector) is provided that indicates the power level at theoutput flange based upon a known coupling factor. The coupling factor is limited inrange to 40 dB, ± 3 dB. At the specific frequency points, the coupling factor is within± 0.25 dB, representing the power at the output flange.

This connector is connected to a probe in the output waveguide assembly of the TWTA.The output power of the amplifier may be approximately determined by monitoring thisport.

2.3.4.5 RF Output (J5)

The RF output is a WR-75G or WR-137G interface.

The output frequency is determined by the type of installation:

• C-band (5845 to 6425 MHz)• Extended C-band (6725 to 7025 MHz)• Ku-band (14.0 to 14.5 GHz)

2.3.4.6 Waveguide

The RF output waveguide port is located on the end of the amplifier. Ensure that theproper matching waveguide flange (C-band: CPR137G; Ku-band: WR-75) and gasketsare used to connect the RF output to the feed horn of the antenna. Information regardingwaveguide connection kits is located in Section 2.2.1.

1. Position the interconnecting waveguide flange with the amplifier waveguideflange. Make sure that the flanges can be mated without strain or torsion.

2. If the two flanges cannot be properly aligned or if the installation is subject tovibration, use a flexible waveguide section to eliminate potential strain on thewaveguide connection.

3. Insert any necessary gaskets and windows between the two flanges.

Note: If the connecting waveguide is to be pressurized at greater than 5 PSI, awaveguide window must be installed at the output flange of the amplifier.

4. Start by hand tightening all mounting screws (C-Band: 10-32; Ku-Band: 6-32).

5. Tighten all mounting screws with the appropriate size Allen wrench.


2–28 Rev.1

CAUTION

Do not over-tighten the waveguide mounting screws.Over-tightening may strip the threads in the waveguide flange.

2.3.4.7 System Interface Wiring

Refer to Figure Chapter 2-7 for the system interface wiring between the TWTA and RFTfor a single thread system.

Note: In Figure Chapter 2-7, a set of double UPPERCASE letters (e.g., “AA”)corresponds to a small letter (e.g., “a”) on the cable connector.


Rev.1 2–29

Figure Chapter 2-7. Single Thread System M&C Cable Harness (CA/5124)


2–30 Rev.1

2.4 HPC-1200 Installation

2.4.1 Mechanical

Refer to Figure Chapter 2-8 for dimensional information. The controller can be rack- orbench-mounted. The mounting brackets are removable.

Drawer slides are not required for rack installations. Mount the unit to the rack with themounting brackets supplied with the HPC-1200. The rubber feet are removable.

The following procedure assumes installation in a standard rack.

1. Verify that the rack will accept the unit. Refer to Figure Chapter 2-8 formounting dimensions.

2. Set the unit in place and secure it to the rack with screws and washers. (Rack-mounting screws and washers are not supplied with the unit.)

Note: All connections are made at the rear panel of the unit.

TW TA CO N TRO L LE RGND +15VD C H E LIX

CUR RENTHV

M ON ITO RTE MP

A NALO G

EX TERNA LIN TE RLOC K

PO WERO N

HIG HV O LTAGE

STANDBY

FAULTS S TATU S

TE MP B EA MSE LE C TED O N

HE LIXA RC

FTDFANLOCK

HV O NSUM MARYFAU LT

FA N ONLAM P TES T

O N

LO CAL

R E MOTE

HEATERS TAN DBY

ON

HIG HVO LTAG E

ACPO W ER

O N

4 8 .26 cm(19 .00 in .

)

4.09 cm(1 .61 in.

)

1 6 .61 cm(6.54 in .

)

Figure Chapter 2-8. HPC-1200 Outline Drawing


Rev.1 2–31


The HPC-1200 controller (Figure Chapter 2-9) provides for the following list of externalconnections on the rear panel (Table Chapter 2-5):

Table Chapter 2-5. Rear Panel Connectors

Ref. Name Rear Panel ConnectorJ1 Remote Interface D-type, 25 pin, maleJ2 ODU Monitor & Control D-type, 25 pin, female

J2J1

ODU MONITOR & CONTROL

J2 TO POW ER AMPLIFIER (FEMALE DB-25)J1 REMOTE CONTROL INTERFACE

REMOTE INTERFACE

Figure Chapter 2-9. HPC-1200 Rear Panel Connector Locations

2.4.2.1 External Interfaces (J1)

The HPC-1200 Remote Control Interface (J1) is MPS compatible. The interfaceconnector (J1) pinouts are described in Table Chapter 2-6 and shown in Figure Chapter2-10.

All Control Command Inputs are static protected, opto-isolated inputs with internal pull-up to +15V through 10k resistor. The external interlock is relay or switch contact closureto the interlock return. All Status Indicator outputs are transient-protected, open collectoropto-isolated transistors with a minimum in-line series resistance of 100Ω.

Pins 4 and 5 must be connected to enable operation of the power supply. These pins havebeen internally connected by the manufacturer.


2–32 Rev.1

Table Chapter 2-6. Remote Control Interface Connector Pinouts

Type Pin # Function ReturnPin #

Comment

Control Interfaces

(All circuits areactive LOW)

2356

High Voltage Select ON ControlHigh Voltage Select OFF ControlExternal Interlock (see Note below)Fault Reset Control

4444

Pin 4 tied to Pin 16.

Digital Status Circuits

(All circuits areactive LOW)

81012212325

High Voltage ON Status IndicatorSummary Fault IndicatorHigh Voltage Select ON IndicatorStandby Status IndicatorFTD (Filament Time Delay)Remote/Local Indicator

722249

1113

Pins 7, 9,11, and 22 tied together.May be interchanged.

Analog Status Circuits 141517

Helix Current MonitorHigh Voltage MonitorTWT Temperature Monitor

161616

Pin 16 tied to Pin 4.

Output Voltage Circuits 119

+24 Volts DC+15 Volts DC

1616

Ground 4, 16 Common Ground (connected) NA

Note: Pin 5 is connected to Pin 4 with an internal jumper.

TWTA REMOTE CONTROL INTERFACE CONNECTOR(MALE) DB-25(M)

MATING REMOTE CONTROL INTERFACE PLUG(FEMALE) DB-25(F)

14 25

1 13

14

13

25

1

Figure Chapter 2-10. Interface Connector Pinouts


Rev.1 2–33

2.4.2.1.1 Control Interfaces

1. High Voltage Select ON (Pin 2). Momentarily connect Pin 2 to ground (Pin 4) tolatch the High Voltage Select relay in the ON state. Return = Pin 4.

2. High Voltage Select OFF (Pin 3). Momentarily connect Pin 3 to ground (Pin 4)

to release the latch of the High Voltage Select relay and set it to the OFF state.Return = Pin 4.

3. External Interlock (Pin 5). This circuit is designed for normally closed operation

(Pin 5 connected to Pin 4). Opening this circuit disables High Voltage ON. Opencircuit voltage is 15 VDC. The circuit is current limited to less than 1 mA whenshorted. Return = Pin 4.

4. Fault Reset (Pin 6). Momentarily connect Pin 6 to ground (Pin 4) to reset latched

faults. Return = Pin 4. Note: Activating the Beam Select OFF command line, followed by activating the

Beam Select ON command line, will also clear latched faults.

2.4.2.1.2 Digital Status Circuits

The digital status interface circuits are isolated outputs as shown in Figure Chapter 2-11.

EXTERNAL CIRCUITS INTERNAL CIRCUITS

STATUS LINE

RETURN

STATUS LINE

PHOTO-COUPLER

Pair of I/OConnector

Pins for EachStatus Circuit

Customer SuppliedPull-Up Resistorand 5-15 VDC

Figure Chapter 2-11. Digital Status Circuit Isolation

Note: The term “active = low” is used in the following paragraphs to indicate when acondition is true and the status indicator is active (e.g., the photo-diode is conducting).


2–34 Rev.1

1. High Voltage ON Indicator (Pin 8). (Active = low.) When active, indicates thatthe amplifier is ON, i.e., the transistor is turned ON and the collector Pin 8 (+) ispulled to the emitter (Pin 7). Maximum open voltage is 20V and maximumswitched current is 3 mA. The switch is an isolated photo-coupler.Return = Pin 7.

2. Summary Fault Indicator (Pin 10). (Active = low.) When active, indicates there

is fault within the amplifier, i.e., the transistor is turned ON and the collectorPin 10 (+) is pulled to the emitter (Pin 22). Maximum open voltage is 20V andmaximum switched current is 3 mA. The switch is an isolated photo-coupler.Return = Pin 22.

3. The faults included are:

a. Helix Over-Current b. High Voltage

c. Over-Voltage/Under-Voltage

d. Over-Current (Triggering HV Fault)

e. Power Supply Over-Temperature 4. High Voltage Select ON Indicator (Pin 12). (Active = low.) When active,

indicates the High Voltage ON command has been selected, i.e., the transistor isturned ON and the collector Pin 12 (+) is pulled to the emitter (Pin 24).Maximum open voltage is 20V and maximum switched current is 3 mA. Theswitch is an isolated photo-coupler. Return = Pin 24.

5. Standby Indicator (Pin 21). (Active = low.) When active, indicates the unit is

ready for on-line service, i.e., the transistor is turned ON and the collector Pin 21(+) is pulled to the emitter (Pin 9). Maximum open voltage is 20V and maximumswitched current is 3 mA. The switch is an isolated photo-coupler.Return = Pin 9.

6. FTD (Filament Time Delay) Indicator (Pin 23). (Active = low.) When active,

indicates the Filament Time Delay cycle is in progress, i.e., the transistor isturned ON and the collector Pin 23 (+) is pulled to the emitter (Pin 11).Maximum open voltage is 20V and maximum switched current is 3 mA. Theswitch is an isolated photo-coupler. Return = Pin 11.

7. Local/Remote Indicator (Pin 25). (Active = low.) When active, indicates the

front panel Local/Remote switch has been set to Remote, i.e., the transistor isturned ON and the collector Pin 25 (+) is pulled to the emitter (Pin 13).Maximum open voltage is 20V and maximum switched current is 3 mA. Theswitch is an isolated photo-coupler. Return = Pin 13.


Rev.1 2–35

2.4.2.1.3 Analog Status Circuits

1. Helix Current Monitor (Pin 14). The TWT’s helix current may be determined bymonitoring the voltage on Pin 14. There are 2 mA of current for each voltmeasured. Return = Pin 16.

2. High Voltage Monitor (Pin 15). The high voltage level may be determined by

monitoring the voltage in Pin 15. This output (VDC) is proportional to the highvoltage (1000/1). Return = Pin 16.

3. TWT Temperature Monitor (Pin 17). The TWT collector temperature may bedetermined by monitoring the voltage on Pin 17 and referring to the chart inFigure 2-5. Return = Pin 16.

2.4.2.1.4 Output Voltage Circuits

1. +24 Volts (Pin 1). 24 VDC at 100 mA is available for external use. 2. +15 Volts (Pin 19). 15 VDC at 100 mA is available for external use or for

powering the control and status circuit indicators.


2–36 Rev.1

2.4.2.2 ODU Monitor and Control (J2)

The discrete signal interface is defined with an M&C connection as described below inTable 2-7. The pinouts are for the 25-pin D type female connector.

Table Chapter 2-7. M&C Connector Pinouts

Type Pin # FunctionControl Commands

(All circuits are active low outputs)

2469

2123

AC Power ONHigh Voltage EnableHeater StandbyFault ResetControl Common (TWT GND)

Status Indicators, Digital Inputs 1378

10121516171820

Helix/Arc Fault LatchedHelix/Arc/FaultHeater Timer CompleteTWT Temp FaultHigh Voltage ONFan ONHigh Voltage FaultFan ON HighSummary FaultFan LockStatus RTN (HPC GND)

Status Monitors, Analog Inputs 254

1114

ReservedHelix CurrentHigh Voltage MonitorTWT Temperature

Input Voltage (Power ON Indicator)Input Voltage (from TWT)

5191322

+15 VDC (100 mA max.)+24 VDC (100 mA max.)VDC/Analog RTN (TWT GND)N/A


Rev.1 2–37

2.4.2.3 Prime Power

The HPC operates from DC voltage provided by the TWTA unit. This is the +15 VDCand the +24 VDC output from the TWTA.


2–38 Rev.1


Rev. 1 3–1

3Chapter 3. REDUNDANT SYSTEM

INSTALLATION

This chapter provides installation instructions for the HPCST-5000/-7000, andHPKST-12000 high-power satellite terminals in a redundant system configuration. Forinstallation instructions for related system components (RFTs, RSUs, and LNA plates),refer to the appropriate manual:


• CST-7000 C-Band Satellite Terminal (INSAT) Installation and OperationManual


• RSU-503 Redundancy Switch Unit Installation and Operation Manual

Redundant System Installation High-Power TWTA Satellite Terminals

3–2 Rev 1

WARNING




3.1 Unpacking

The redundant TWTA assembly is shipped as a unit in one crate.

Before unpacking the carton components, ensure that there is plenty of room around thecarton for workspace. A large table is recommended.

To remove the parts:

1. Remove the screws from the lid of the wooden crate, and remove the lid.

CAUTION

Because the redundant TWTA assembly is heavy, assistance may benecessary to remove the unit from the box.

2. Unbolt the TWTA assembly and remove it from the crate.

3. Remove the remainder of the parts from the crate. Refer to Section 3.2.1 for aparts breakdown.

Note: Save the packing material for reshipment.

High-Power TWTA Satellite Terminals Redundant System Installation

Rev. 1 3–3

3.2 Inspecting the Equipment

1. Carefully check the TWTA assembly for damage incurred during shipment.

2. Carefully check the TWTA assembly against the packing list shipped with theequipment to ensure that the shipment is complete. Refer to the followingparagraphs.

3.2.1 Included Parts

A typical TWTA system contains the following components.

Notes:1. Parts are not drawn to scale.2. Because each system can be custom ordered, it is beyond the scope of this

manual to provide the unlimited configuration possibilities.

Qty. Description Qty. Description1 TWT amplifier assembly. 1 High-power TWTA Teminal System

Installation and Operation Manual.

1 Envelope containing the test data.

Notes:1. C-band TWTAs (HPA-500, -700) utilize waveguide kit KT/5115.2. The Ku-band HPA (HPA-1200) utilizes waveguide kit KT/2820.


3–4 Rev 1

1 C-band waveguide connector kit (EFData Part # KT5115), which includes:

Qty. Description Qty. Description1 Gasket — full-thickness.

EFData Part # FP/5195.

1 Gasket — half-thickness.

EFData Part # HW/GKT-CPR137G.8 10-32 x 1” bolt.


16 #10 flat washer.




8 10-32 hex nut.


1 Ku-band waveguide connector kit (EFData Part # KT/2820), which includes:

Qty. Description Qty. Description2 O-Ring, -024, BUNA, black.


2 O-Ring, black neoprene.

EFData Part # 32P1039.8 6-32 x 7/8” socket head cap screw.

EFData Part # HW/6-32X7/8SHCS.

16 #6 flat washer.


8 #6 split lockwasher.


8 6-32 hex nut.



Rev. 1 3–5

Note: Depending on the type of installation, the proper cable kit (KT/5249-1, -2, -3, or -4) will besupplied with the TWTA.

1 Cable kit (EFData Part # KT/5249-1), which includes:



1 Cable assembly.

EFData Part # PL/5240-1.

1 Cable hardware kit.

This kit contains the following connectors:CN/DSB09FSPT01CN/DSB09H01CN/DSB09MSPT01CN/DSB15F01CN/DSB15H01CN/DSB15MSPT01CN/DSB37H01CN/DSB37M01CN/MS-STPG41M01

EFData Part # KT/5249.


3–6 Rev 1




1 Cable assembly.







EFData Part # PL/5122-1.

2 Cable assembly.

EFData Part # PL/5240.1 Cable hardware kit.




Rev. 1 3–7




2 Cable assembly.





1 Cable kit (EFData Part # KT/5124), which includes:



1 Cable assembly.

EFData Part # PL/5240.1 Cable hardware kit.

This kit contains the following connectors:CN/CRC39S20RC01CN/MS-STPG32M01CN/STPG26M01



3–8 Rev 1

1 Hardware kit (EFData Part # KT/5125), which includes:

Qty. Description Qty. Description2 Unistrut — 14” long.

EFData Part # FP/3595.Used for round and square pole mount only.

8 5/16-18 x 1.25” bolt.

EFData Part # HW/5/16-18X1.25BLT.

8 Pipe block.

EFData Part # HW/BLK-PIPE2-8.Used for round pole mount only.


EFData Part # HW/5/16-SPLIT.

4 Threaded rod, 5/16-18 x 14”.

EFData Part # HW/RD5/16-18X14.Used for round and square pole mount only.

20 5/16” flat washer.

EFData Part # HW/5/16-FLT.8 Flat fitting plate, 5/16”.

EFData Part # HW/FIT-PLT-5/16.

12 5/16-18 hex nut.

EFData Part # HW/5/16-18HEXNT.

12 5/16-18 spring nut.

EFData Part # HW/5/16-18SPNUT.


Rev. 1 3–9

3.3 TWTA Installation

At the customer’s discretion, the TWTAs can be installed anywhere on or near theantenna. The supplied hardware allows the installer a wide range of installationalternatives, including:

• Vertical pole (e.g., mast) (either square or round). This is the most typicalinstallation.

• Within the hub of a large antenna.

EFData recommends that the TWTAs be mounted vertically.

Note: A clearance of 2” (5.08 cm) is required for the air inlets and exhaust ports. If theTWTA is mounted in an enclosed chamber, duct the exhaust air to the outside of thechamber. Do not re-circulate the exhaust air back into the TWTA. Use an exhaust ductthat is slightly larger than the exhaust port of the TWTA and one that has smooth bendsand transitions.


3–10 Rev 1

3.3.1 Tools Required

Qty. Description1

1

1

1

3/8” drive ratchet.

3” x 3/8” drive extension.


½” x 3/8” drive socket. (Metric equivalent: 13mm, 6 pt.)

1 ½” combination wrench. (Metric equivalent: 13mm combinationwrench with a 6 pt. Box end.)

1 7/64” hex key (allen wrench). (No metric equivalent.)

1 5/16” combination wrench. (Metric equivalent: 8mm combinationwrench with a 6 pt. Box end.)


Rev. 1 3–11

3.3.2 Vertical Pole Installation

3.3.2.1 Round Pole

Note: The following process is for a typical installation. Custom systems may beordered, and are beyond the scope of this manual.

To install the TWTA to a round vertical pole:

1) Install the pipe blocks as follows:

a) Install two spring nuts in each of four 14” unistruts (the two on the TWTA,and two additional).

Be sure to position the spring nuts in the unistruts wide enough apart so thatwhen the pipe blocks are installed, they will clear the pole when the unit islifted into place for installation.

b) Install each spring nut as follows:


(2) Press down onthe spring nut tocompress thespring, and rotatethe nut 90° (i.e.,perpendicular tothe unistrut).



c. Using four 5/16-18 bolts, 5/16” split lockwashers, and 5/16” flat washers,loosely secure the pipe blocks to the spring nuts.


3–12 Rev 1

2. Install the threaded rods as follows:

a. Install two spring nuts in both 14” unistruts mounted on the TWTA.

Note: Ensure the spring nuts are positioned over the outer holes in the 14”unistruts.

b. To install each spring nut:


(2) Press down onthe spring nut tocompress thespring, and rotatethe nut 90° (i.e.,perpendicular tothe unistrut).



c. Thread a 5/16-20 nut approximately 1-1/2” onto each threaded rod. (Thiswill ensure that the threaded rods will extend beyond the spring nuts wheninstalled.)

d. Place a 5/16” splitlockwasher, 5/16” flatwasher, and flat fittingplate over eachthreaded rod.


Rev. 1 3–13

e. One threaded rod at atime, hold the washersand plate in place onthe rod, and screw therod into a spring nut.

Notes:1. Be sure to position the flanges of the flat fitting plates in the grooves

of the unistruts.2. Before tightening the nuts on the threaded rods, ensure that the end

of each rod is screwed in until it is flush with the backside of theunistrut. This ensures the rods are threaded completely through thespring nuts.

f. Thread a 5/16-18 nutabout 2” onto the endof each threaded rod.

g. Slip a 5/16” splitlockwasher, 5/16” flatwasher, and flat fittingplate (in that order)onto each threadedrod.


3–14 Rev 1


a. Lift the TWTA into position on the vertical pole.

b. Slip a 14” unistrut over each of pair of threaded rods (upper and lower).

Note: Install the 14” unistruts with the open face toward the pole.

c. Install a 5/16” flatwasher, 5/16” splitlockwasher, and 5/16-18 nut on eachthreaded rod.

d. Position the TWTA asdesired, and tightenthe 5/16-18 nutsinstalled in Step 3.c.

e. Slide the pipe blocksinward until theycontact the verticalpole, then firmlytighten the 5/16-18bolts.

3.3.2.2 Square Pole

For square vertical pole installation, follow the steps in Section 3.3.2.1, with thefollowing exceptions:

• Do not perform Step 1.• Do not perform Step 3.e.

3.3.3 Spar Mount

There is no spar mount option with redundant TWTAs.


Rev. 1 3–15


Refer to Chapter 2, Section 2.3.4, for information on connections between the TWTAand other equipment.

3.3.4.1 System Interface Wiring

Note: In all cable drawings (Figures 3-1 through 3-4), a set of double UPPERCASEletters (e.g., “AA”) corresponds to a small letter (e.g., “a”) on the cable connector.

Refer to Figure 3-1 for the system interface wiring between the TWTA, RFT, and RSUfor a redundant system.

Refer to Figure 3-2 for a schematic of the customer interface cable. This cable is notincluded with TWTA systems, and must be ordered separately from EFData. (If thecustomer has an M&C system, this illustration is typical.)

Refer to Figure 3-3 for a schematic of the uplink-only cable.


3–16 Rev 1

Figure 3-1. HPCST/KST 1:1 Redundant System Cable Harness (CA/5122)


Rev. 1 3–17

Figure 3-1. HPCST/KST 1:1 Redundant System Cable Harness (CA/5122) (Continued)


3–18 Rev 1

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Figure 3-2. HPCST/KST 1:1 Redundant M&C System Interface Cable (Optional) (CA/5279)


Rev. 1 3–19



3–20 Rev 1

R E S E R V E D

Figure 3-3. HPCST/KST 1:1 Uplink-Only Redundant System Cable Harness (CA/5248)


Rev. 1 3–21

Figure 3-3. HPCST/KST 1:1 Uplink-Only Redundant System Cable Harness (CA/5248)(Continued)


3–22 Rev 1

Figure 3-4. HPCST/KST Single TWTA System Cable Harness (CA/5124)


Rev. 1 3–23

3.4 HPC-1110 Installation

As part of the redundant system installation procedures, the TWTAs are installed andtested before they are connected to the redundant system controller. The onlymechanically-critical item for the controller is locating and installing the cabinet slideassemblies that support the controller in the rack.

3.4.1 Mechanical

An outline drawing of the HPC-1110 is shown in Figure 3-5.

Rear panel electrical connection requirements are determined by the insert optionsincorporated into the unit.

There are five steps for mechanical installation of the controller:

1. Determine the location of the controller in the rack.

2. Install the cabinet slide assemblies in the rack.

3. Install the controller on the cabinet slide assemblies.

4. Install the front panel mounting screws to secure the controller in the rack.

5. If the controller options include RF input switching, install the necessary RFinput coaxial cables.


3–24 Rev 1

3 .35 in .

(43 .1 8)1 7.0 in .

1(48 .2 6)

9.0 in .

3(8.89 ).50 in .

18 .0 in .

TWTAPower

HeaterStandby HV ON

PowerRemote

Local Manual

Automat ic


B

A

1 :1 C O N T R O LL E R

(45 .7 2)

(8.50 )


Note: All dimensions are in inches, metrics are in parenthesis.


Rev. 1 3–25

3.4.1.1 Cabinet Slide Assembly

As shown in Figure 3-5, the controller is equipped with a pair of chassis slides. Theseslides mate with a pair of slide assemblies mounted in a standard 19” (48.26 cm)rack.The chassis slide assemblies are mounted to the cabinet with adjustable mountingbrackets (Figure 3-6).

Notes:1. The specific installation details are dependent upon the rack (cabinet) design and

the specifics of the redundant system. Two cabinet slide assemblies and fourmounting brackets (two front and two back) are supplied with each controller.

2. If the front support bracket is mounted on the face of the cabinet mounting rail,the combination of the bracket and the bracket mounting screw will not allow thedrawer front panel to be flush with the cabinet mounting rail. Spacers are used insome systems to compensate for the thickness of the bracket and its mountingscrews.


3–26 Rev 1

Figure 3-6. Cabinet Slide Assemblies

Note: The right and left cabinet slide assemblies are identical.


Rev. 1 3–27


All connections are made at the rear panel of the controller (Figure 3-7). With theexception of prime power, which should be connected last, the timing and sequencing ofthe controller connections are not critical. However, the correct TWTA connectors mustbe connected to the corresponding set on the rear panel of the controller.

The HPC-1110 provides for a discrete interface for monitor and control of the TWTA.The HPC-1110 provides inputs for switch position indicators (2 pins and common). Allother connections are not used.

Name Connector TypeController Prime Pwr AC AC PlugAUX TWTA “A” Aux Interface D-type, 25 pin femaleAUX TWTA “B” Aux Interface D-type, 25 pin femaleWG SW #1 D-type, 15 pin femaleEIA-485 Remote Control D-type, 9 pin maleEIA-232-C Remote Control D-type, 9 pin male

TWTA "A" TWTA "B" TWTA "C"

EXTERNAL INTERLOCK

REMOTE FUNCTIONS WAVEGUIDESWITCH "1"

ADDRESS

1 2 3 4 5 6 7 8 9 10 RS485 RS232WAVEGUIDESWITCH "2"

"Y" Insert Panel"X" Insert Panel

Figure 3-7. HPC-1110 Rear Panel


3–28 Rev 1

3.4.2.1 Standard Connections

This section describes the line of connectors on the bottom of the HPC-1110 rear panel,starting with the left-most (facing the rear panel) connector shown in Figure 3-7.

3.4.2.1.1 AC Prime Power

The HPC will operate from 84 to 260 VAC, single phase, 47 to 63 Hz power source.

For domestic systems, a prime power 115 VAC cable is supplied with the controller. Theprime power connector is shown in Figure 3-8.

Note: Prime power redundancy is built into the controller. If prime power to thecontroller is lost and the TWTAs have prime power, the TWTAs will automaticallypower the controller.

AC POWERSWITCH

FUSEBLOCK

ACMALE

CONNECTOR

USE ONLY WITH 250VFUSES /EMPLOYERUNIQUEMENT AVECDES FUSIBLES DE 250V.

Figure 3-8. Prime Power Connector


Rev. 1 3–29

3.4.2.1.2 TWTA Serial Interface

The TWTA “A”, TWTA “B”, and TWTA “C” connectors are not functional.

3.4.2.1.3 External Interlock/Remote Functions

Current configurations do not support this interface. The external interlock function hasbeen disabled internally.

3.4.2.1.4 Waveguide Switch #1

The waveguide switch #1 pinouts are presented in the table below, and pictured inFigure 3-9.

Pin # Function/Description1 Ground2 Waveguide Switch Position “A” Indicator3 Waveguide Switch Position “B” Indicator

4 to 15 N/A

D B-15 FEM ALE, FR O N T VIEW

8 1

15 9

Figure 3-9. Waveguide Switch Connector Pinouts

3.4.2.1.5 Waveguide Switch #2

Waveguide switch #2 is not supported in the current configuration.


3–30 Rev 1

3.4.2.1.6 Remote Control Serial Interface

The HPC-1110 provides for a remote serial interface using either a EIA-232-C or -485type interface.

The EIA-485 connector is programmed according to the following switch settings on theADDRESS select switch on the rear panel.

SettingSW # 4-Wire 2-Wire

1 ON ON2 OFF ON3 ON OFF4 N/A N/A5 N/A N/A6 AD0 AD07 AD1 AD18 AD2 AD29 AD3 AD3

10 AD4 AD4

Note: The address switch settings from SW6 to SW10 are user-defined.

The EIA-485 pinouts are as follows:

EIA-485Pin # 4-Wire 2-Wire

1 (-) TX Data (-) TX/RX Data2 (-) RX Data (-) TX/RX Data3 N/C4 N/C5 GND6 (+)TX Data (+) TX/RX Data7 (+) RX Data (+) TX/RX Data8 N/C9 N/C

The EIA-232-C pinouts are as follows:

Pin # EIA-232-C1 DCD — Data carrier Detect2 RXD — Received Data3 TXD — Transmitted Data4 DTR — Data Terminal Ready5 GND6 DSR — Data Send Ready7 RTS — Request to Send8 CTS — Clear to Send9 RI — Ring Indicator


Rev. 1 3–31

Figure 3-10. EIA-422, -485 Pinouts, COM2 Only


3–32 Rev 1

Figure 3-11. EIA-232-C Pinouts

3.4.2.2 “X” Insert Panel Connectors

The connectors on the “X” insert panel are hard-wired to mating connectors on theTWTAs.

3.4.2.2.1 Auxiliary Interface

The auxiliary interface connectors are DB 37 female connectors and are used as thediscrete interface between the controller and TWTAs. The auxiliary interface connectorsare labeled on the “X” insert panel as:

• TWTA “A” auxiliary interface• TWTA “B” auxiliary interface

Note: Ensure that:1. All cables from the TWTA “A” auxiliary connector go to the “X” insert panel

connectors marked TWTA “A”.2. All cables from TWTA “B” go to the connectors marked TWTA “B”.

Pinouts for the TWTA auxiliary interface connectors are presented in the table belowand pictured in Figure 3-12.


Rev. 1 3–33

Type Pins FunctionsControl Commands

(All active low)

24692123

AC Power ONHigh Voltage EnableHeater StandbyFault ResetNot Applicable

Status Indicators, digital inputs

(unless specified, all active low)

137810121516171820

Not ApplicableNot ApplicableHeater Timer CompleteNot ApplicableHigh Voltage ONNot ApplicableNot ApplicableNot ApplicableSummary FaultNot ApplicableStatus Return

Status Indicators, analog outputs 4111314225

Not ApplicableNot ApplicableVDC/Analog ReturnNot ApplicableNot ApplicableNot Applicable

Input Voltages 519

+15 VDC (100 mA max.)DC Power on Detect

External Voltage Input 22 Not ApplicableNot Used 26 to 37 Not Applicable

Figure 3-12. Auxiliary Interface Connector Pinouts

3.4.2.3 “X” Insert Panel Configurations

The configurations used for redundant systems incorporating rack-mounted TWTAs areoutlined in Figure 3-13.


3–34 Rev 1

Figure 3-13. “X” Insert Configuration

Figure 3-14. Configuration 1, “X” Insert Panel

3.4.2.4 “Y” Insert Panel Connectors

There are no “Y” insert panel configurations supported at this time.

Rev.1 4–1

4Chapter 4. TWT AMPLIFIERS

This chapter describes the HPA-500, -700, and -1200 antenna-mounted TWTAs.

For overview information, including specifications, refer to Chapter 1. For installation(e.g., connector) information, refer to Chapters 2 (for single thread systems) or 3 (forredundant systems).

WARNING




TWT Amplifiers High-Power TWTA Satellite Terminals

4–2 Rev. 1

4.1 Operation and Control

4.1.1 Control and Status Interface

TWTAs are externally controlled. The TWTAs do not include any control switches orstatus indicators for operator use. Refer to Chapters 5 and 6 for information on externalcontrol and status indicator interfaces.

Optional remote control panels, the HPC-1200 (used for single thread systems) and theHPC-1110 (used for 1:1 redundant systems), includes all switches necessary to operatethe amplifiers. For details, refer to Chapter 5 and 6, respectively.

An external control and monitor unit should be used to operate the TWTAs. Control andstatus signals are accessed via a 32-pin interface connector (J1).

Note: It is recommended that operating time (standby and beam on), operatingconditions (power level), and maintenance actions be recorded in a power amplifier log.

4.1.2 Operating Modes

There are five amplifier operating modes:

• Heater Delay• Heater Standby• Standby• High Voltage ON• Fault

4.1.2.1 Heater Delay

When power is first applied to the amplifier, voltage is applied to the TWT heater. Theheater must be at operating temperature in order for the tube to function properly. Thetypical warm-up period is three minutes. During this warm-up period, the TimerComplete status line is not active. When the heater delay is complete, the TimerComplete status line becomes active (low).

If there is a power failure, the high voltage is kept off for a period proportional to theprime power off-time. At the end of this period, the high voltage is automatically applied(assuming that the High Voltage ON control line is active).

High-Power TWTA Satellite Terminals TWT Amplifiers

Rev. 1 4–3

4.1.2.2 Heater Standby

Heater Standby is enabled when the Heater Standby control line is set low. When primepower is first turned on, full heater voltage is applied during the Heater Delay mode. Atthe end of the Heater Delay mode, the heater voltage is reduced if the high voltage isOFF, and Heater Standby is enabled.

The heater voltage reduction feature enhances tube life when the amplifier is the backupunit in a redundant configuration. In this mode, the TWT is ready for high voltage to beapplied. Heater voltage returns to normal when High Voltage ON is enabled, or HeaterStandby is disabled (set high).

4.1.2.3 Standby

In Standby mode, the TWT is ready for high voltage to be applied. The Timer Completestatus line is active (low), and the High Voltage ON status line is not active (high).

4.1.2.4 High Voltage ON

When High Voltage is ON (applied to the TWT), RF input signals are amplified, and theHigh Voltage ON line is active (low). If the High Voltage ON control line is activated(set low) before the Heater Delay is complete, high voltage remains off until the delay iscomplete.


4–4 Rev. 1

4.1.2.5 Fault

This mode exists anytime a condition detrimental to the TWT is detected by the powersupply fault detection circuitry. Any of the following conditions trip the fault detectioncircuitry:

1. Excessive Helix Current Fault.When the power supply detects a Helix Current fault, it turns high voltage OFFand then tries to turn the high voltage ON. If the fault persists for three OFF/ONcycles, the fault circuit latches, and the power supply stops automaticallyrecycling. The Helix/Arc Fault line remains active (low) at this point. Once theHelix/Arc Fault circuit latches, clear the fault by briefly activating the FaultReset control line, or by deactivating the High Voltage ON control.

2. High Voltage Fault.When a fault occurs, the high voltage fault circuit latches immediately. Clear ahigh voltage fault by setting the Fault Reset control line low, or by setting theHigh Voltage ON control high.

3. TWT Over-Temperature Fault.Reducing the temperature of the TWT’s collector to a safe operating levelautomatically clears a TWT over-temperature fault and re-enables high voltage(if the High Voltage ON control signal is active).

CAUTION

An over-temperature fault should be cause for immediatemaintenance action as it is an indication of a fan failure or blockedair passage(s).

4. Fan Lock Fault.This fault indicates that fan rotation is restricted or the fan has failed.

CAUTION

A fan lock fault should be cause for an immediate maintenanceaction as it is an indication of a foreign object jamming the fan or afan failure.

5. Interlock Fault.An interlock prevents high voltage from being applied if the amplifier’s cover isremoved.

WARNING

Extreme caution should be used any time the cover is off the unit.To be safe, assume the high voltage is always on.


Rev. 1 4–5

4.1.2.5.1 Clearing Faults

Faults can be cleared in two ways:

1. Cycle High Voltage OFF, then ON.2. Momentarily set the Fault Reset control line low.

If the fault condition occurs frequently, maintenance action is required.

4.1.3 Control and Status Signals

4.1.3.1 Control

1. AC Power ON.Connect Pin a to Pin W (ground) to power ON the amplifier.

2. High Voltage ON/OFF.

This control signal turns the High Voltage ON (control line set low) or OFF(control line set high). The High Voltage ON signal enables TWT amplificationby turning the TWT electron beam on or off.

3. Heater Standby.

This control signal reduces the voltage applied to the TWT heater(ON = control line set low) (see Section 4.1.2.2 for details). Turning HighVoltage ON overrides the Heater Standby command and returns the TWT heatervoltage to normal operating value.

4. Fault Reset.

This control signal resets the High Voltage fault and Helix Current fault(reset = control line momentarily set to low).

Note: Turning the High Voltage OFF also clears faults.


4–6 Rev. 1

4.1.3.2 Digital Status

1. Helix/Arc Fault Latched.There is a helix/arc fault within the amplifier. Status line goes low when the faultoccurs. See Section 4.1.2.5 for details.

2. Helix/Arc Fault.

There is a helix/arc fault within the amplifier. Status line goes low when the faultoccurs.

Note: In the event of a helix/arc fault, the amplifier attempts to reset. This line

“flashes” during each reset cycle. 3. Heater Timer Complete.

Heater Delay status indicator. Status line goes low when the heater delay cycle iscomplete.

4. TWT Temperature Fault.

There is a TWT Temperature fault within the amplifier. This is not a latchedfault. When the TWT cools to an acceptable temperature, the amplifierautomatically powers ON.

5. A TWT Temperature fault may be caused by:

a. Air intake filter clogged b. Cooling fins clogged c. Fan failure d. Fan power supply failure

6. High Voltage ON.

High voltage system status indicator. Status line goes low when high voltage isON.

7. Fan ON.

The amplifier’s main cooling fan is on. The main cooling fan is controlled by thetemperature of the TWT. The fan cycles on and off in cooler ambient conditions.To maximize fan life, the fan usually operates below the nominal voltage design.Status line goes low when the fan is on.

8. High Voltage Fault.

A high voltage fault exists within the amplifier. Status line goes low when thefault occurs. A high voltage fault is typically an indication of a serious powersupply failure.


Rev. 1 4–7

9. Summary Fault.

There is a fault within the amplifier. Status line goes low when the fault occurs. 10. Fan Lock.

The fan is locked. A fan lock signal is caused by fan failure or an objectinterfering with fan rotation. Status line goes low when the fault occurs.

4.1.3.3 Analog

1. Helix Current.The TWT helix current may be determined by monitoring this voltage. There is2 mA of helix current for each volt measured.

2. High Voltage Monitor.

The high voltage applied to the TWT may be determined by monitoring thisvoltage. The high voltage is divided down so that one volt output equals 1,000V.

3. TWT Temperature.

The TWT’s collector temperature may be determined by monitoring this voltage.


4–8 Rev. 1

4.1.4 Initial Power-Up

The following checklist should be followed to ensure proper operation of the amplifierand to avoid permanent damage to it.

CAUTION

Failure to observe any of the following instructions may cause permanentdamage to the amplifier and will void the warranty.

4.1.4.1 Pre-Power Check

1. The prime power voltage is within the specified limits of the amplifier. (Refer toChapter 1 for the unit’s specifications.) The correct power input connector pinsmust be used, depending on voltage level and prime power source.(See Section 2.3.4.2 and Figure 2-6.)

2. The amplifier is installed within an enclosure. The exhaust air from the amplifiershould be ducted to the outside of the cabinet so that the warm air is not re-circulated into the amplifier air intake.

3. The RF output is terminated with a load capable of dissipating 500W CW. Thisload should have a maximum VSWR of 2.2:1.

4. The RF drive signal is within the frequency range of the amplifier specificationand does not exceed by more than 2 dB of the input power required to saturatethe TWT.

CAUTION

Exceeding the input power limit will cause a helix current fault andmay permanently damage the TWT.


Rev. 1 4–9

4.1.4.2 Power-On Sequence

The pin numbers referenced in this section apply to connector J1, the interfaceconnector.

1. Connect Pin a to ground. This applies prime power to the TWT power supply.Wait until the heater time delay cycle is complete (Pin G goes low).

2. Connect Pin F to ground. This turns High Voltage ON. The High Voltage ONstatus line (Pin K) goes low.

3. Turn on the test RF signal source. Slowly increase the drive power to theamplifier. Monitor the RF output power though the amplifier’s built-in powersampler, or though an external coupler.

CAUTION

Driving the TWT by more than 2 dB beyond the input powerrequired to reach the saturation point may cause permanent TWTdamage.

4.1.5 Shut Down

There are three shut down modes:

1. High Voltage OFF, heater at full power.If the amplifier is to be deactivated for a short time (a few minutes to an hour),turn High Voltage OFF by disconnecting Pin F from Pin W.

2. High Voltage OFF, heater in standby mode.If the amplifier is to be shut down for a few hours and quick power-up isrequired, disconnect Pin F from Pin W and connect Pin J to Pin W. This placesthe amplifier is heater standby mode.

3. Amplifier OFF.If the amplifier is to be shut down for an extended period, disconnect Pin a fromPin W. This completely deactivates the TWT and allows the TWT heater to cool.

Note: These actions are performed by the optional TWT controllers.


4–10 Rev. 1

4.2 Maintenance and Service

4.2.1 Preventive Maintenance

Periodic preventive maintenance should be performed on the amplifiers.

1. Check the integrity of the mounting bolts. Tighten as necessary.

2. Check the integrity of the output waveguide flange mounting bolts. Tighten asnecessary.

3. Check the air inlet and exhaust ports for cleanliness. Ensure that the screens areintact, and there is no debris in the heat fins. Use high pressure air to blow dustand debris out of the bottom cover.

Rev. 1 5–1

45Chapter 5. CONTROLLER FOR SINGLE

THREAD SYSTEMS

This chapter describes the HPC-1200 (Figure 5-1), the controller used for single threadTWTA systems.

Figure 5-1. HPC-1200

The HPC-1200 provides full control and monitoring of the EFData TWTAs.

The HPC-1200 is cable connected to the TWTA and can be located at any site that isconvenient for the user for local control of the TWTA.

Prime power for the HPC-1200 is supplied by the TWTA via the interconnecting cable.

Refer to Section 1.3 for HPC-1200 specifications.

Refer to Chapter 2 for installation instructions.

Controller for Single Thread Systems High-Power TWTA Satellite Terminals

5–2 Rev. 1

5.1 Operation

In a typical configuration, the TWTA is mounted on or near the antenna. The localcontroller is installed in a sheltered location and connected by cable to the TWTA. Asecond controller, the remote controller, can be connected to the local controller. Referto Figure 5-2.

The TWTA can be controlled from the HPC-1200 front panel (LOCAL control) or fromthe remote controller (REMOTE control). Selection of the LOCAL or REMOTE controloperation is determined by the REMOTE/LOCAL switch on the HPC-1200 front panel.

H P C -1200 C ontro ller(Local C ontro ller)

C on tro l C ab le TW TA

P rim e P o w er

M ain S ystem C om puter(R em ote C ontro lle r)

Figure 5-2. Typical Configuration

High-Power TWTA Satellite Terminals Controller for Single Thread Systems

Rev. 1 5–3

5.1.1 LOCAL Control Configuration

When the LOCAL control configuration is selected (switch is down), all HPC-1200 frontpanel controls and indictors are enabled.

5.1.2 REMOTE Control Configuration

When the REMOTE control configuration is selected (switch is up):

• The HV ON/OFF switch of the HPC-1200 front panel is disabled.

• The HEATER STANDBY switch of the HPC-1200 front panel remains active.Setting the HIGH VOLTAGE switch on overrides HEATER STANDBY.

• All front panel status indictors and monitors are enabled.

5.1.3 Controls and Indicators

The HPC-1200 front panel controls, monitors, and indicators are summarized inTables 5-1 through 5-4 and pictured in Figures 5-3 through 5-6. Refer to the Chapter 4for a description of TWTA operating modes.

Table 5-1. Monitor Point and Lamp Test Descriptions

Key# Nomenclature Type Function1 GND jack Pin Jack Common ground for monitor outputs.2 +15 VDC jack Pin Jack +15 VDC at 100 mA available for external use.3 HELIX CURRENT

monitorPin Jack Voltage proportional to helix current. 1V output (DC)

equals 2 mA of helix current.4 HV MONITOR

monitorPin Jack Voltage proportional to cathode voltage applied to the

TWT (1000:1 ratio). 1V (DC) equals 1000V DC appliedto cathode.

5 TEMP ANALOGmonitor

Pin Jack Voltage proportional to TWT collector temperature. SeeFigure 5-7 for calibration.

6 LAMP TESTswitch

Momentary toggleswitch

When pressed UP, forces all front panel LEDs to light.


5–4 Rev. 1

Figure 5-3. Monitor Points and Lamp Test


Rev. 1 5–5

Table 5-2. Fault Indicator Descriptions

Key# Nomenclature Type Function7 EXTERNAL

INTERLOCKfault indicator

Digital status(LED = Red)

When lit, indicates external interlock circuit has been opened. Does nottrigger Summary Fault.

8 HELIX ARCfault indicator


When lit, indicates helix current is too high. Can be caused by arcing inoutput waveguide or load, or defective TWT.

9 HIGH VOLTAGEfault indicator


When lit, indicates an internal power supply fault. Contact the EFDataCustomer Support Department for corrective action.

10 TEMPfault indicator


When lit, indicates TWT temperature is too high. Disables high voltageuntil the temperature drops below the preset value.

11 FAN LOCKfault indicator


When lit, indicates TWT cooling fan is locked. Contact the EFDataCustomer Support Department for corrective action.

12 SUMMARY FAULTindicator

LED = Red When lit, indicates fault has been detected or TWT interface interlockproblem.

7 8 9 10 11 12

E X T E R N A LIN T E R L O C K

H E L IXA R C

H IG HV O LTA G E

T E M P

FA U LT S

FA NL O C K

S U M M A RYFA U LT

Figure 5-4. Fault Indicators


5–6 Rev. 1

Table 5-3. Status Indicator Descriptions

Key# Nomenclature Type Function

13 POWER ONindicator

Digital status(LED = Green)

When lit, indicates prime power is applied to the TWTA power supply.

14 FTDindicator

Digital status(LED = Yellow)

When lit, indicates TWTA is in Filament Time Delay mode. This is anautomatic cycle. Indicator is OFF when time delay cycle is completed.

15 STAND BYindictor

Digital status(LED = Yellow)

When lit, indicates TWTA ready for online service and high voltage isOFF.

16 BEAM SELECTEDONindicator

Digital status:(LED = Green)

When lit, indicates HIGH VOLTAGE ON been selected.

17 HV ONindicator


When lit, indicates high voltage is ON.

18 FAN ONindicator


When lit, indicates TWTA fan is ON. Depending upon the ambient airtemperature, the TWT fan may cycle on and off.

Figure 5-5. Status Indicators


Rev. 1 5–7

Table 5-4. HPC-1200 Local Control Descriptions

Key# Nomenclature Type Function

19 REMOTE/LOCALcontrol switch

Toggle switch When set to LOCAL, the HPC-1200 front is used to operate the TWTA.When set to REMOTE, the TWTA is operated from the remote controller.During REMOTE control operation:

• The HPC-1200 HIGH VOLTAGE ON/OFF switch is disabled.• The AC POWER ON/OFF, LAMP TEST, and REMOTE/LOCAL

switch functions of HPC-1200 remain active• All HPC-1200 front panel status indicators and monitor points

remain active.20 HEATER

STANDBYcontrol switch

Toggle switch When ON (Up), sets TWT filament (heater) voltage to TWT extended lifemode. This function available for LOCAL and REMOTE controloperation.

21 HV ON/OFFcontrol switch

Momentary toggleswitch

Used to set HV (Beam) ON or OFF. Controls high voltage circuit. BeamON enables TWT RF amplification.

22 AC POWERON/OFFcontrol switch

Locking toggleswitch

Enables/disables TWTA operation. (Does not affect prime powerconnection to TWTA.) Pull toggle away from front panel (out) todisengage latch and move the toggle to the UP (ON = enabled) or DOWNposition (OFF = disabled).

Figure 5-6. HPC-1200 Local Controls


5–8 Rev. 1

Figure 5-7. TEMP ANALOG Output Calibration


Rev. 1 5–9

5.2 Maintenance and Service

This section covers preventative maintenance and operator troubleshooting.

5.2.1 Preventative Maintenance

Preventative maintenance is limited to cleaning the unit and checking externalconnections. Proceed as follows:

1. Clean the front panel and top cover, as required, with a soft, damp cloth.

Note: When cleaning the front panel, do not disturb the front panel switchsettings.

2. Check the integrity of the interconnecting cable(s) and connectors.

5.2.2 Operator Troubleshooting

Proceed as follows:

1. Press the LAMP TEST Switch UP. All indicators should light. If any indicatordoes not light, repair and service may be required. If necessary, contact theEFData Customer Support Department.

2. Check that all cable connectors are properly seated on the rear panel of thecontroller and at the TWTA. Seat the connectors as required. If the problempersists, repair and service may be required. If necessary, contact the EFDataCustomer Support Department.

3. Check the interconnecting cables for signs of physical deterioration or damage.If there are signs of damage, contact the EFData Customer Support Department.

4. If the problem persists, note which indicators are dark, and the positions of thefront panel switches. Then, contact the EFData Customer Support Department.


5–10 Rev. 1

5.2.3 Clearing a Fault

If the Summary Fault indicator lights up when the HV ON/OFF switch is set to ON(Beam Select ON), try to clear the fault.

The procedures for clearing a fault in the LOCAL and REMOTE control configurationsare described in the following paragraphs.

5.2.3.1 Clearing a Fault-LOCAL Control Configuration

To clear a fault when the HV ON/OFF switch is set to ON:

1. Momentarily press the HV ON/OFF switch to OFF.2. Momentarily press the HV ON/OFF switch to ON.

If the fault persists, repair and service may be required. If necessary, contact the EFDataCustomer Support Department.

5.2.3.2 Clearing a Fault-REMOTE Control Configuration

To clear a fault when “Beam Select On” has been selected from the remote controller:

1. Momentarily connect the Beam Select OFF line (J1 Pin 3) to J1 Pin 4 (or pressthe equivalent momentary switch to the OFF position).

2. Momentarily connect the Beam Select ON line (J1 Pin 2) to J1 Pin 4 (or pressthe equivalent momentary switch to the ON position).

Additionally, a fault can be cleared with the FAULT RESET command:

1. Momentarily connect J1 Pin 6 to J1 Pin 4.

If the fault persists, repair and service may be required. If necessary, contact the EFDataCustomer Support Department.

Rev. 1 6–1

6Chapter 6. CONTROLLER FOR REDUNDANT

SYSTEMS

This chapter describes the HPC-1110 (Figure 6-1), the controller used for 1:1 redundantTWTA systems.

TW TAPow er

HeaterStandby H V O N

P owerRemote

Local Manual

Automatic


B

A

1 :1 C O N T R O L L E R

Figure 6-1. HPC-1110

Controller for Redundant Systems High-Power TWTA Satellite Terminals

6–2 Rev. 1

6.1 Overview

The HPC-1110 provides complete monitor and control of the EFData TWTAs in aredundant configuration.

The EFData digital controllers are modular units, factory-configured for a variety ofredundant system arrangements. Configuration at the factory provides a consistent userinterface across a broad spectrum of systems. The controller configuration is specifiedwhen the system is purchased.

The controller can be operated in Local or Remote mode. In the Local mode, thecontroller front panel displays redundant system operation, the high voltage of theTWTAs, and reset of TWTA faults. Front panel indicators display the status of thesystem.

For a 1:1 system, the controller (which is hard-wired to the TWTAs via discrete serialinterfaces) connects one of the TWTAs (the primary unit) to the operational load (onlineunit). The other TWTA (the backup unit) is connected to the offline load.

Two serial interfaces (RS-232-C and RS-485) are provided for remote control of theredundant system controller. In the Remote controller mode, full M&C capability isprovided for both the controller and TWTAs. Both serial interfaces allow remote controlof the redundant system and both channels are always active.

Refer to Section 1.3 for HPC-1110 specifications.

Refer to Chapter 3 for installation instructions.

6.1.1 “X” Insert and “Y” Insert Panels

Refer to Figure 6-2 for the basic HPC-1110 rear panel.

REDCTRL4.DS4

TWTA "A" TWTA "B" TWTA "C"

EXTERNAL INTERLOCK

REMOTE FUNCTIONS WAVEGUIDESWITCH "1"

ADDRESS

1 2 3 4 5 6 7 8 9 10 RS485 RS232WAVEGUIDESWITCH "2"

"Y" Insert Panel"X" Insert Panel

Figure 6-2. Basic HPC-1110 Rear Panel

High-Power TWTA Satellite Terminals Controller for Redundant Systems

Rev. 1 6–3

The panel on the upper-left side of the rear panel is identified as the “X” Insert Panel.The panel on the upper-right side of the rear panel is designated as the “Y” Insert Panel.

The “X” Insert Panel connections are used for the quick response channel to each TWTAand the optional redundant system power monitor inputs.

Note: The “Y” Insert Panel is not supported at this time.

For “X” Insert Panel installation and configuration information, refer to Sections 3.4.2.2through 3.4.2.3.

6.2 Operation

6.2.1 User Operational Choices

6.2.1.1 Warm-Standby or Hot-Standby

The user can elect to operate the system in the warm-standby mode or hot-standby mode.The default mode is warm-standby. In warm-standby systems, the primary (online)TWTA(s) develop only full-rated output power, and the backup (offline) TWTA is in thestandby mode.

In hot-standby systems, the high voltage of all TWTAs is ON. The backup TWTA doesnot have any RF input. Selection of the hot-standby mode is via the controller front panelin the Local mode, or via the TWTA serial interface in the controller Remote mode.

• In the controller Local mode, pressing the HIGH VOLTAGE ON switch of thecontroller front panel sets the backup TWTA high voltage ON. Once ON, thehigh voltage of the backup TWTA will remain ON until a new command is sentto the TWTA.

• In the controller Remote mode, the serial interface is used to set the high voltageof the backup TWTA ON for hot-standby operation.

Note: As part of the waveguide switching cycle, the controller commands the highvoltage of the TWTA being brought online to ON. If a non-faulted TWTA is changedfrom the primary position to the backup position, the high voltage status will not bechanged during the switching process.


6–4 Rev. 1

6.2.1.2 Manual or Automatic Switching

Refer to Section 6.2.2.1.3 for information on manual/automatic switching.

6.2.2 Local Controls and Indicators

This section discusses use of the controllers for local control of redundant systems. Referto Appendix A for remote control procedures.

The HPC-1110 is used for 1:1 redundant systems. 1:1 systems have a single RF output.

Note: In the automatic mode, the controller makes all the decisions necessary to maintainthe RF outputs.

6.2.2.1 Basic Controls and Indicators

Table 6-1 summarizes the local control functions and shows that the standard 1:1controller is connected to a pair of TWTAs and controls one waveguide switch.

Table Chapter 6-1. HPC-1110 Local Functions

Control/Indicator FunctionPower Indicator LED (Green).

AC Power ON.Local/Remote Switch Select Local or Remote control.Local Indicator LED (Green).

Local selected.Remote Indicator LED (Green).

Remote selected.Manual/Automatic Switch Select Manual or Automatic Operation.Manual Indicator LED (Green).

Manual Operation selected.Automatic Indicator LED (Green).

Automatic Operation selected.TWTA Power Switches and indicators for turning on and indicating

TWTA is ON.HV ON Switches 2 Switches (A and B).TWTA Status Indicator 2 LEDs (A and B).

OFF — Unit OFF.Blinking Amber — FTD.Amber — Standby.Green — TWTA HV ON.Red — TWTA Faulted.

Waveguide Switch Position Indicators One set of four LEDs (green) switch position indicators.LEDs operate in pairs to indicate switch connections.

Lamp Test Switch (momentary) Tests all front panel LEDs.Fault Reset Switch Reset all latched faults.


Rev. 1 6–5

6.2.2.1.1 Power Indicator

The indicator is an LED that glows green when prime power is applied to the controllerand the AC power switch is ON.

The controller includes a redundant (“OR”) power circuit. If prime power to thecontroller fails and the TWTAs are powered up, the TWTAs provide an alternate sourceof power to the controller.

6.2.2.1.2 Local/Remote Push Button Switch

This switch alternately selects Local or Remote (Table 6-2) operation each time thebutton is pressed. This function is not duplicated in the remote control command set.

Table Chapter 6-2. Local/Remote Modes

Local Mode When set to Local, all control of the redundant system is accomplished via thecontroller front panel. The Local indicator glows green to indicate that the Local modehas been selected.

A remote controller connected to COM2 of the TWTA can independently query andcommand the TWTA (TWTA must be in Remote mode). This includes an override ofan HV OFF command from the controller in Local mode.

Remote Mode When the switch is set to Remote, control of the redundant system passes to the remotecontroller. The displays of the redundant controller remain active and theLocal/Remote switch is active.


6–6 Rev. 1

6.2.2.1.3 Manual/Automatic Push Button Switch

In either Local or Remote mode, the user can select manual switching or automaticswitching (Table 6-3). This switch alternately selects Manual mode or Automatic modeeach time the button is pressed. Manual switching is typically used for maintenanceoperations, and automatic switching is used for routine operations. Manual switching canbe selected via the controller front panel or via a remote controller (when the controlleris set for Remote mode operation).

Table Chapter 6-3. Manual/Automatic Mode

Manual Mode Manual mode is used for maintenance operations. When the redundant controller isset for Manual operation, automatic switching is inhibited and channels can bemanually selected with the A/B channel select switches. This option can also beselected in the Remote mode.

Automatic Mode When the redundant controller is set for Automatic operation, and a fault of theprimary TWTA occurs, the system automatically places the faulted unit in the backupposition and the remaining unit in the primary position. The switchover takes place inless than 100 milliseconds. The new connection is signaled by a correspondingchange in the redundant controller’s transfer switch position indicators.

When a TWTA fault occurs, the TWTA Status indicator of the faulted unit changesfrom green to red.

In a warm-standby system, when a TWTA is switched from backup to primaryposition, the redundant controller commands the high voltage of the switched unit toON.

Note: For hot-standby systems, the high voltage of both TWTAs is always ON.

If the backup TWTA is also faulted, the system will not switch units.TWTA Power ON Each TWTA can be powered up using the appropriate TWTA Power ON switch.


Rev. 1 6–7

6.2.2.1.4 HV ON Push Button Switch

There is an HV ON switch for each TWTA in the system. This switch can be used to setup the hot-standby mode of operation (Table 6-4). There are two indicators associatedwith this switch. The selected indicator lights when the HV ON button is pressed. TheTWTA Status indicator glows green when the high voltage of the TWTA is ON. Thisswitch can also be used to turn off the high voltage of the TWTA controlled by theswitch

Table Chapter 6-4. HV ON Push Button Switch

Indicator Color StatusTWTA “A” HV ON SelectedIndicator

Green TWTA “A” high-voltage is ON

TWTA “B” HV ON SelectedIndicator

Green TWTA “B high-voltage is ON

TWTA “A” Status Indicator 1. Dark2. Blinking Amber3. Steady Amber4. Green5. Red

1. Serial interface not functional2. FTD cycle in process3. Standby4. High Voltage ON5. TWTA fault

TWTA “B” Status Indicator 1. Dark

2. Green3. Red

1. High voltage is OFF and the unit is notfaulted.

2. High voltage is ON3. TWTA faulted


6–8 Rev. 1

6.2.2.1.7 Waveguide Switch Position Indicators

Figure 6-3 shows a typical set of switch position indicators (a set of four LEDs). TheLEDs light in pairs (green) to show the current position of the output waveguide switch.

The top set of Figure 6-3 shows TWTA “A” in the primary position, while the bottom setof the same figure shows TWTA “A” in the backup position.

Figure 6-3. Typical Waveguide Switch Position Indicators

6.2.2.1.8 Fault Reset Push Button Switch

To reset all controller and TWTA latched faults, press the Fault Reset push buttonswitch. This command is available in the Remote mode.

6.2.2.1.9 Lamp Test Push Button Switch

To light all front panel LEDs for one second, press the Lamp Test push button switch.This function is not available in the Remote mode.


Rev. 1 6–9

6.2.3 TWTA Setup for Redundant System Operation

Normal redundant system operation is enabled when:

• Prime power is applied to the TWTAs and the controller• Both TWTAs have been set for Local mode (Remote if available)• Both TWTAs have been setup prior to entering AUTO mode• Both TWTAs are operating normally (non-faulted)• Select AUTO mode

Note: Refer to Section 4.1.2 for a description of TWTA operating modes.

6.2.3.1 Remote Controller Mode

In Remote mode, all commands are entered via a remote controller using one of thecontroller serial interfaces. In the Automatic mode, the system will automatically switchwhen the primary TWTA faults. In the Manual mode, automatic switching is disabled.The controller displays are active. Refer to Appendix A for remote control procedures.

6.2.3.2 Local Controller Mode

In Local mode, all redundant commands are entered via the controller front panel. Frontpanel switches and displays are active. TWTA commands can be entered via the COM2serial interface of the TWTAs. In the Automatic mode, the system will automaticallyswitch when the primary TWTA faults. In the Manual mode, automatic switching isdisabled.

6.2.4 Initial Power-On

This section describes the initial power-on procedure. Use this procedure when thesystem is initially installed, and whenever major repairs are made to the system. Proceedas follows:

1. Connect an RF load (capable of dissipating full rated power) to the outputwaveguide flange of the waveguide/switch assembly.

WARNING

Never operate the amplifier with an open waveguide. This amplifieris capable of generating high power microwave radiation, which cancause bodily harm. Prior to operation of the TWTA, ensure that allmicrowave connections are securely fastened. Check that there is nomicrowave leakage.


6–10 Rev. 1

2. Set the AC power switch of the TWTAs and controller to ON. The redundantcontroller Power indicator should light (green).

Note: Test the operation of the power redundancy circuit by setting the ACpower switch of the controller to OFF. If either one of the TWTAs is ON, thecontroller should be ON. Set the controller AC power switch back to ON.

3. If the TWTAs were not fully tested during installation of the system, test bothTWTAs in accordance with Chapter 4.

4. Set the controller to Manual mode. The Manual indicator should be lighted. Ifthe Automatic indicator is lighted, press the Manual/Automatic switch once.

CAUTION

Wait five seconds between switchovers.

5. The primary TWTA status indicator should be green, and the backup TWTAstatus indicator should be amber or green.

6. Press the HV ON switch for the backup TWTA. The TWTA Status indicator

should change from amber to green. This is the condition for hot-standbyoperation.

Note: For hot-standby systems, all TWTA status indicators should be green.

7. Press the Manual/Automatic switch. The Automatic indicator should light.

6.2.5 Normal Operation

The system is now ready for use. Remember that for normal operation:

• Both TWTAs must be ON with the TWTAs set for Remote operation.

• The redundant controller is set to Automatic (Automatic indicator is green).

• For Local operation, the Local indicator of the controller is green.

Note: Press the push button located between the Local and Remote indicators tochange operation to the Remote mode.

• For Remote operation, the Remote indicator of the controller is green.

• For Automatic operation, the Automatic indicator is lighted.

Rev. 1 A–1

AAppendix A. PROGRAMMING GUIDE FORREDUNDANT CONTROLLER

This appendix provides programming guidelines for the HPC-1110, the controller usedfor 1:1 redundant TWTA systems.

A.1 Overview

This appendix assumes that the redundant system has been installed and checked out inaccordance with the installation information. This appendix also assumes that thehardware has been properly setup for the serial interface control link. Refer to Chapter 3for serial interface hardware setup information.

This appendix discusses the redundant system command set, plus the communicationprotocols used to implement the serial interfaces used for remote control of redundantsystems. Although a wide variety of redundant system configurations are available, acommon redundant system command set (consisting of “query” commands and “control”commands) is used for all digitally-controlled redundant systems. This command set isdiscussed in detail in Section A.3.

Note: All digital TWTAs share a common command set called the TWTA command set(see Section A.4). The TWTA command set is different from the redundant systemcommand set. The communication protocols for remote control of the TWTAs aresimilar to those for the redundant systems, but the message structures differ. Inparticular, the message structures used for redundant systems allow for a primary addressbyte (for the controller) and a secondary address byte (for the TWTAs), while themessage structure for direct remote control of TWTAs has a single address byte (forTWTAs).

Programming Guide for Redundant Controller High-Power TWTA Satellite Terminals

A–2 Rev. 1

Redundant systems include two serial-interface communications channels (RS-232-C andRS-485) that are available for remote control use at any time. Concurrent commands onboth channels are acknowledged on each channel as they are received. The last commandreceived has precedence. Any conflict between commands sent via the two serialinterfaces is resolved in favor of the last command received.

When the system is set for REMOTE operation, remote “query” commands and remote“control” commands are accepted by the system. When the system is setup for LOCALoperation, remote “query” commands only are accepted and remote “control” commandsare ignored.

Note: For LOCAL operation procedures and details, refer to Chapter 6 for the redundantcontroller supplied with the redundant system.

Section A.2 of this guide discusses the communication protocols.

Section A.3 discusses the redundant system command set.

Section A.4 presents the TWTA command set.

A.1.1 Communication Protocols

Serial communications with the system controller is achieved using two messageformats:

• Command message format• Response message format

The system controller is assigned a unique address (Primary Address Byte). Theprocedure for assigning the primary address is discussed in Chapter 6. The defaultprimary address is the ASCII character “Z”. The TWTAs are identified as “A”, “B”, etc.(secondary address byte). Each TWTA is hard-wired (interface cable) to the redundantcontroller. The system controller decodes the secondary address to forward the TWTAcommands to the proper TWTA. The command links between the system controller andeach TWTA is via an RS-232-C serial interface.

High-Power TWTA Satellite Terminals Programming Guide for Redundant Controller

Rev. 1 A–3

A.2 Communication Protocols

Two message formats are used:

• “command” message format• “response” message format

Each format is discussed in detail in the following paragraphs.

Note: Two ASCII reference tables are included in the following paragraphs.

A.2.1 Command Message Format

The structure of the command message is:

HEADERBYTE

PRIMARYADDRESS(Controller)

SECONDARYADDRESS(Amplifier)

COMMANDByte

PARAMETERS(If Required)

ENDINGBYTE

CHECKBYTE

Each element of the command message is described in the following paragraphs.

Note: The communication protocols for direct control of the TWTAs (single TWTAs notinstalled as part of a redundant system) is similar to but not the same as that for directcontrol of the redundant system controller. The difference is that the TWTA commandand response messages do not include a secondary address byte. In a redundant system,the controller receives and identifies TWTA commands (which are flagged by thesecondary address byte of the command message sent to the controller) and forwardsthem to the appropriate TWTA(s).

A.2.1.1 Header and Ending Byte

Two options are available:

• “non-printable” mode• “printable” mode

The header byte determines which mode is to be used. The header bytes and ending bytesare paired as shown in Table A-1. The check byte mode is also set to match the mode ofthe Header and Ending byte. The header byte of the command message determines themode of the response message. If the command is structured as non-printable mode, theresponse will be returned in the non-printable mode. If the command is structured asprintable mode, the responses will be returned in the printable mode.


A–4 Rev. 1

Table A-1. Header Byte Codes

Message Mode Header Byte Code Ending Byte CodeNon-Printable ASCII STX (HEX 02H) ASCII ETX (HEX 03H)Printable ASCII “” (HEX 7BH) ASCII “” (HEX 7DH)

A.2.1.2 Primary Address Byte

The primary address byte is the poll address of the redundant system controller. Theprimary address byte can be any letter from ASCII A to ASCII Z (capitals only).

SW1 on the rear of the controller determines the poll address (primary address) of theredundant system controller.

A.2.1.3 Secondary Address Byte

If the secondary address is ASCII Z, the controller accepts the message as a controllermessage. If the secondary address is ASCII Y, the controller passes the message to allTWTAs. If the secondary address byte is not Z or Y, the controller directs the message tothe TWTA with the same poll address as the secondary address. Switches on the rearpanel of the TWTAs determine the secondary address of the TWTAs.

The poll addresses assigned to the redundant system controller and all TWTAs includedin the system must be known by the user. The TWTA poll addresses are set with SW1 onthe rear panel of the TWTAs.

A.2.1.4 Command Byte

If the secondary address is Z, the redundant controller will act upon the commandrepresented by the command byte. The redundant controller command set is discussed inSection A.3.

For a secondary address of Y (or a valid TWTA address), the TWTA(s) will act upon thecommand represented by the command byte. The TWTA command set is summarized inSection A.4.

A.2.1.5 Parameters

When command parameters are required, they are placed in this message element.Redundant controller parameters are discussed in Section A.3. TWTA commandparameters are summarized in Section A.4.


Rev. 1 A–5

A.2.1.6 Check Byte

Select the calculation that matches the mode set with the Header Byte. The check bytecalculation choices are:

1. Calculation for Non-printable mode — The checksum is the “exclusive or”(XOR) of all the message bytes including the header and ending bytes. Selectingthis option may result in the check byte not being a printable ASCII character.

2. Calculation for Printable mode — The check byte is calculated as follows:

a. Sum all of the message bytes.

b. Multiply the number of message bytes by 32. The message bytes include theheader byte, the ending byte, and all of the other bytes in between.

c. Subtract 2.b. from 2.a.

d. Take the modules of C (base 95) and add 32. This will always result in aprintable ASCII character in the range between 32 and 126.

A.2.1.7 Parity

COM1 (of both the controller and the TWTAs) is set for 8 bits, one stop bit, no parity.COM2 can be customized to meet user requirements. All characters received by thecontroller on COM2 are checked for even, odd, or no parity as defined by the user. Thedefault setting for COM2 is 8 bits, one stop bit, no parity. When active, a parity error inany character will cause the command to be ignored.


A–6 Rev. 1

A.2.2 Response Message Format

The structure of the response message is:

HEADERBYTE

PRIMARYADDRESS(Controller)

SECONDARYADDRESS(Amplifier)

RESPONSEByte

PARAMETERS(If Required)

ENDINGBYTE

CHECKBYTE

Each element of the response message is described in the following paragraphs.

A.2.2.1 Header and Ending Byte

The response header and ending bytes are set by the command message Header Byte.The possibilities are:

• Response for Non-printable mode — The response message header byte is eitherASCII ACK (06H) for commands that have been accepted, or ASCII NAK (15H)for commands that have been rejected. The ending byte is ASCII ETX (03H).

• Response for Printable mode — The response message header byte is ASCII “”(7BH). The ending byte is ASCII “” (7DH).

A.2.2.2 Address Byte

The response message primary address byte is set by the command message. Theresponse message secondary address byte is set by the command message.

A.2.2.3 Response Byte

The response message byte is determined by the command byte.

A.2.2.4 Parameters

Location of parameters that complement the response byte when parameters are requiredfor the return message.

A.2.2.5 Check Byte

The check byte is calculated the same way for response messages as it is for commandmessages.


Rev. 1 A–7

A.2.2.6 Parity

The parity and number of bits per character are the same for the response messages asare those in the command messages.

A.2.2.7 Command Reject Argument

When a command is transmitted, the controller responds within 100 milliseconds toindicate that one of the following has occurred:

• Command was accepted and its execution has begun• Command was rejected

If a command is not accepted, a reject code is returned. Defined reject codes are listed inTable A-2.

Table A-2. Command Not Executed Codes

ASCII Command Definitiona Command byte not recognizedb Illegal parameter or parameter out of rangec System in local moded Slow command being executede Hardware or software failuref High voltage is offg RF is Inhibitedh Reservedi Invalid key or key sequencej Change in setting can only be made locallyk A fault condition exists

l to z Reserved


A–8 Rev. 1

A.2.3 ASCII Reference Information

Table A-3 lists the decimal and hexadecimal equivalents for ASCII characters.

Table A-4 lists multi-character values.

Table A-3. ASCII Cross Reference

Char Dec Hex Char Dec Hex Char Dec HexNUL 000 00 + 043 2B V 086 56SOH 001 01 , 044 2C W 087 57STX 002 02 - 045 2D X 088 58ETX 003 03 . 046 2E Y 089 59EOT 004 04 / 047 2F Z 090 5AENQ 005 05 0 048 30 [ 091 5BACK 006 06 1 049 31 \ 092 5CBEL 007 07 2 050 32 ] 093 5DBS 008 08 3 051 33 ^ 094 5EHT 009 09 4 052 34 _ 095 5FLF 010 0A 5 053 35 ` 096 60VT 011 0B 6 054 36 a 097 61FF 012 0C 7 055 37 b 098 62CR 013 0D 8 056 38 c 099 63SO 014 0D 9 057 39 d 100 64SI 015 0F : 058 3A e 101 65

DLE 016 10 ; 059 3B f 102 66DC1 017 11 < 060 3C g 103 67DC2 018 12 = 061 3D h 104 68DC3 019 13 > 062 3E i 105 69DC4 020 14 ? 063 3F j 106 6ANAK 021 15 @ 064 40 k 107 6BSYN 022 16 A 065 41 1 108 6CETB 023 17 B 066 42 m 109 6DCAN 024 18 C 067 43 n 110 6EEM 025 19 D 068 44 o 111 6F

SUB 026 1A E 069 45 p 112 70ESC 027 1B F 070 46 q 113 71FS 028 1C G 071 47 r 114 72GS 029 1D H 072 48 s 115 73RS 030 1E I 073 49 t 116 74US 031 1F J 074 4A u 117 75

SPACE 032 20 K 075 4B v 118 76! 033 21 L 076 4C w 119 77“ 034 22 M 077 4D x 120 78# 035 23 N 078 4E y 121 79$ 036 24 O 079 4F z 122 7A% 037 25 P 080 50 123 7B& 038 26 Q 081 51 | 124 7C‘ 039 27 R 082 52 125 7D( 040 28 S 083 53 ~ 126 7E) 041 29 T 084 54 DEL 127 7F* 042 2A U 085 55


Rev. 1 A–9

Table A-4. Meaning of Multi-Character ASCII Codes

NUL = null VT = vertical tab SYN = synchronous idleSOH = start of heading FF = form feed ETB = end transmission blocSTX = start of text CR = carriage return CAN = cancelETX = end of text SO = shift out EM = end of mediumEOT = end of transmission SI = shift in SUB = substituteENQ = enquiry DLE = data link escape ESC = escapeACK = acknowledge DC1 = device control 1 FS = file separatorBEL = bell DC2 = device control 2 GS = group separatorBS = backspace DC3 = device control 3 RS = record separatorHT = horizontal tab DC4 = device control 4 US = unit separatorLF = line feed NAK = negative

acknowledgeDEL = delete


A–10 Rev. 1

A.3 Redundant System Command Set

This section presents the commands used for remote control of redundant systems(command byte portion of the command message). Commands sent to the systemcontroller are either “query” or “control” commands.

Note: Refer to Section A.4 for TWTA commands which are different from those usedfor control of the redundant system controller.

Controller Query commands (Table A-5) elicit information such as controller ID orcontroller status. These commands are executed independent of whether the systemcontroller is set for REMOTE or LOCAL mode.

Controller Control commands (Table A-6) initiate an action such as waveguide switchposition changes or UPS Enable. These commands are only executed when the systemcontroller is in the REMOTE mode.

In a redundant system, TWTA commands are routed to the TWTAs by the controller.Make sure that the right command set is used when programming the system. Use thecommands of this section to program the redundant system controller and the commandsof Section A.4 to program the TWTAs included in the redundant system. Refer toSection A.2 for a discussion of the command messages sent to the controller and howTWTA commands are embedded in the controller command messages.


Rev. 1 A–11

A.3.1 Controller Query Commands

The controller query commands and responses are listed in Table A-5.

Table A-5. Redundant System Controller Query Commands

ASCII Description0 ID/Version. Returns a 10 character string identifying the controller model number and software revision.

The first 7 characters define the model number, the 8th character is the software major revision, and the9th and 10th characters are the software minor revision numbers.

1 Summary Status. Five bytes of status are returned.

Byte Bit Meaning1 7 Parity

6 Complement of bit 55 RF input switch control flag4 Local (1)/Remote (0)3 Change Flag2 RF Inhibited (1)1 Waveguide Switch 1: Position “A” bit = (1), Position “B” bit = (0)0 (LSB) Automatic bit = (1)/Manual bit = (0)

2 7 (MSB) Parity6 Complement of bit 55 Waveguide switch fault4 Input transfer switch fault3 Reflected power fault2 TWTA “A” fault bit = (1)1 TWTA “B” fault bit = (1)0 TWTA “C” fault bit = (1)

3 7 (MSB) Parity6 Complement of bit 55 CX channel reflected power fault4 Ku channel reflected power fault3 Maintenance mode flag (1), (Local/Manual)2 TWTA “A” RF inhibit flag bit = (1)1 TWTA “B” RF inhibit flag bit = (1)0 TWTA “C” RF inhibit flag bit = (1)

4 7 (MSB) Parity6 Complement of bit 55 Hot Standby bit = (1), Cold Standby bit = (0)4 UPS function enabled bit = (1)3 Constant power mode bit = (1)2 Waveguide Switch 2: Position A bit = (1), Position B bit = (0)1 Waveguide Switch 3: Position A bit = (1), Position B bit = (0)0 Waveguide Switch 4: Position A bit = (1), Position B bit = (0)

5 7 (MSB) Parity6 Complement of bit 55 Transfer Switch 1: Position A bit = (1), Position B bit = (0)4 Transfer Switch 2: Position A bit = (1), Position B bit = (0)3 TBD2 TBD1 TBD0 TBD


A–12 Rev. 1

2 RF Power Query (forward). Requires a diode detector connected to the auxiliary RF sample port “A”.

Input: No data or 1 byte of data.<no data> Returns power on sample port “A”<C> Returns power on C/X channel<K> Returns power on Ku channel

Returned: Power returned in XX.X dBm.

L RF Power Query (load). Requires a diode detector connected to auxiliary RF sample port “C”.

Input: No data or 1 byte of data.<no data> Returns power on sample port “C”<C> Returns power on C/X channel<K> Returns power on Ku channel


R RF Power Query (reflected). Requires a diode detector connected to auxiliary RF sample port “B”.

Input: No data or 1 byte of data.<no data> Returns power on sample port “B”<C> Returns power on CX channel<K> Returns power on Ku channel



Rev. 1 A–13

A.3.2 Controller Control Commands

The redundant system control commands are listed in Table A-6.

Table A-6. Redundant System Controller Control Commands

ASCII Description6 Manual/Automatic. When the controller is set for REMOTE mode, configures controller for manual or

automatic mode.

Input: 1 byte of data.<0> Sets controller for manual mode<1> Sets controller for automatic mode

7 RF Disable/Enable. Disables or enables RF chain of all TWTAs connected to the controller.

Input: 1 byte of data.<0> Disables RF chain<1> Enables RF chain

9 Fault reset command. Resets TWTA resetable faults of all TWTAs connected to the controller.

Input: No data required.B Waveguide position. Repositions a selected waveguide switch as follows:

Input: 2 bytes of data.<1A> Selects waveguide switch “1” position “A”<1B> Selects waveguide switch “1” position “B”<2A> Selects waveguide switch “2” position “A”<2B> Selects waveguide switch “2” position “B”<3A> Selects waveguide switch “3” position “A”<3B> Selects waveguide switch “3” position “B”<4A> Selects waveguide switch “4” position “A”<4B> Selects waveguide switch “4” position “B”

Note: During the waveguide switch repositioning cycle, RF output is momentarily inhibited.D Transfer switch position. Repositions selected transfer switch as follows.

Input: 2 bytes of data.<1A> Selects transfer switch “1” position “A”<1B> Selects transfer switch “1” position “B”<2A> Selects transfer switch “2” position “A”<2B> Selects transfer switch “2” position “B”

E Hot/Warm Standby. Sets TWTA’s high voltage status of offline (backup) TWTA(s). In WARM standby, thehigh voltage of the offline TWTA(s) is OFF. When the primary TWTA faults, the high voltage of a backupTWTA is activated before the waveguide switch sets the faulted TWTA offline and the backup unit online.

In HOT Standby, the high voltage of the unfaulted offline TWTA(s) is always ON.

Input: 1 byte of data.<0> Hot Standby<1> Warm Standby


A–14 Rev. 1

F Increment/Decrement Calibration Factors. This command will increment or decrement the factory setcalibration factors for the auxiliary RF power sample command ports. This command is intended for use inthe event a customer supplied diode detector is installed on one of the auxiliary RF sample ports. The“new” diode can then be calibrated by attaching a thermistor to the sample port and measuring power thenconnecting the diode and adjusting the internal calibration factor.

Note: The diode must be a positive output device or externally conditioned to look like one, maximum inputvoltage +5 VDC.

Input: 6 bytes of data.Byte 1 selects the auxiliary RF sample port to be recalibrated.

<A> Selects port “A” (typically used for forward power)<B> Selects port “B” (typically used for reverse power)<C> Selects port “C” (typically used for load power)

Byte 2 selects positive or negative increments.<+> Increment positive calibration<-> Increment negative calibration

Bytes 3 to 6 determine the increment in XX.X dB.<XX.X>

P Set Power. This command determines the setting of the output power of the backup TWTA when it ischanged from the backup to the primary position.

Input: 1 to 5 bytes of data.<0> Turns function OFF<1XX.X> Sets power for the RF #1 Chain Output<2XX.X> Sets power for the RF #2 Chain Output (1:2 Systems)<3XX.X> Sets power for the RF #3 Chain Output (1:3 Systems)<4XX.X> Sets power for the RF #4 Chain Output

UPS Enable. This command activates the controller main power failure mode.

For a redundant HOT standby system backed up by a UPS, it is advisable to set the off-line TWTA’s highvoltage OFF during the main power failure. This dramatically decreases the power reserve required in theUPS. In the UPS Enable mode of operation the controller turns off the off-line TWTA(s) high voltage when aprime power failure occurs.

There are two software adjustable time delays:• Delay before off-line TWTA high voltage is shut OFF after the fault occurs• Delay before high voltage is turned on after restoration of prime power

Input: 1 to 10 bytes of data.<0> Disables UPS command<1XXXX,YYYY> Enables UPS command; sets the first time delay to XXXX seconds and

the second time delay to YYYY seconds


Rev. 1 A–15

A.4 TWTA Command Set

The TWTA command set is presented in the following paragraphs.

A.4.1 TWTA Query Commands

The TWTA query commands are listed in Table A-7.

Table A-7. TWTA Query Commands

ASCII Description0 ID/Version. Returns a 10-character string identifying the TWTA model number and software revision. The

first 7 characters define the model number, the 8th character is the software major revision, and the 9th and10th characters are the software minor revision numbers.

1 Summary Status. Returns 2 bytes of controller status information as follows.


6 Complement of bit 55 Power supply enabled4 High voltage on3 Standby2 Remote mode1 Constant power on0 RF inhibited

2 7 Parity6 Complement of bit 55 Summary Fault4 Status change3 Output power change of more than 2%2 Alarm condition exists1 Reserved0 Reserved

2 Misc. Status, TWTA. Requires one of the following parameters:

0 Returns long , comma delimited, “!” terminated string of all status information1 Returns output power in default units as a “!” terminated string2 Returns reflected power in default units as a “!” string3 Returns TWT temperature in default units as a ‘!” terminated string4 Returns Helix Current as a “!” terminated string5 Returns Helix Voltage as a “!” terminated string6 Returns Heater hours as a “!” terminated string7 Returns Beam hours as a “!” terminated string8 Returns 1 byte representing default units for power:

0 = dBm1 = dBW2 = Watts

9 Returns 1 byte representing default units for temperature:0 = Celsius1 = Fahrenheit


A–16 Rev. 1

3 Fault Status. Returns TWTA fault status information in the following form.


6 Complement of bit 55 Helix Arc Fault Latched4 Helix Arc Fault3 Over Temp Fault2 Over Voltage Fault1 Fan Locked0 Low Line

2 7 Parity6 complement of bit 55 Under Voltage Fault4 VSWR Fault3 External Interlock Open2 Low Output Power1 High Output Power0 Reserved

4 Fault History. Returns a “!” terminated array of “!” terminated strings containing the last 100 faults.5 Current Screen. Returns 4 strings, 20 characters in length, matching what is currently displayed on the

TWTA display.6 Power in dBW. Returns 3 characters of the current output power in the form of xx.x (dBW).7 Power in Watts. Returns 4 characters of the current output power in the form of xxxx (Watts).8 Attenuator Setting. Returns 4 characters corresponding to attenuation level.9 Alarm Condition. Returns 1 byte of alarm status.

Bit Meaning7 Parity6 Complement of bit 55 High RF4 Low RF3 High VSWR2 Reserved1 Reserved0 Reserved


Rev. 1 A–17

A.4.2 TWTA Control Commands

The TWTA control commands are listed in Table A-8.

Table A-8. TWTA Control Commands

ASCII Description@ High Voltage On. Activates beam-on request and causes high voltage to be applied to the TWT when

appropriate (i.e., after filament time delay).A High Voltage Off. Deactivates beam-on request and turns off the high voltage if it is on. This normally

places the TWTA in the standby state.B Fault Reset. Reset any of the TWTA’s resetable faults.C Set Attenuator. Steps attenuator up or down X number of steps. Parameter is a “!” terminated string

containing the number of steps proceeded by a + or - sign.D Set Power in dBW. Sets the TWTA to the requested power level when four ASCII characters in the form

XX.X (where X indicates the digit 0 through 9) are applied as an argument in the command message.E Set Power in Watts. Sets the TWTA to the requested power level when a number of the form XXXX is sent

as an argument in the command message.F Set Constant Power out (dBW). Sets constant output power level to xx.x dBW. Parameter is a 3-character

string.G Set Constant Power out (Watts). Sets constant output power level to xxxx Watts. Parameter is a

4-character string.H Terminate Constant Output Power. Ends TWTA auto gain stabilization.I Force RF Inhibit. Turns off RF Chain.J Clear RF Inhibit. Turns on RF Chain.K Fault Reset.L Set Low RF Trip Point (Watts). Sets low RF Trip Point in Watts. Parameters = 6 bytes.

Byte 1 Character “A” (hex 41) for Alarm SettingCharacter “F” (hex 46) for Fault Setting

Byte 2 to 6 Trip Point Value xxxx WattsM Set High RF Trip Point (Watts). Sets high RF Trip Point in Watts. Parameters = 6 bytes.

Byte 1 Character “A” (hex 41) for Alarm SettingCharacter “F” (hex 46) for Fault Setting

Byte 2 to 6 Trip Point Value xxxx WattsN to Q Reserved.

R Enable RF Limits. Turns on RF limit checking.S Disable RF Limits. Turns off RF limit checking.

T to U Reserved.


A–18 Rev. 1

V Send “Key”. “!” terminated string of characters. Each character must be from the following list of keys.

ASCII Hex Decimal MeaningA 41 65 HV OnB 42 66 HV OffC 43 67 ClearD 44 68 SetupE 45 69 EnableF 46 70 EnterG 47 71 Status2H 48 72 Status1I 49 73 Gain Down 0.1 dB StepJ 4A 74 Gain Up 0.1 dB StepK 4B 75 Gain Down 1.0 dB StepL 4C 76 Gain Up 1.0 dB StepW 4D 77 Soft key 1X 4E 78 Soft key 2Y 4F 79 Soft key 3Z 50 80 Soft key 40 30 48 “0”1 31 49 “1”2 32 50 “2”3 33 51 “3”4 34 52 “4”5 35 53 “5”6 36 54 “6”7 37 55 “7”8 38 56 “8”9 39 57 “9”. 2E 46 “.”

W Force Summary Fault. Forces a summary fault on the TWTA Controller.X to Z Reserved.

Rev. 1 g–1

GGlossary

The following is a list of acronyms and abbreviations that may be found in this manual.

Acronym/Abbreviation

Definition

Ω Ohms32 Internal 32 VDC Power5V Internal 5 VDC PowerA Ampere

AC Alternating CurrentASA Address Select Unit AASB Address Select Unit B

ASCII American Standard Code for Information InterchangeAUX AuxiliaryBER Bit Error Ratebit/s bits per secondBTU British Thermal Units

C CelsiusCAL CalibrateCBL Cable(s)

CLNA Calibrated LNACLR CLEAR

COMP CompensationCR Carriage ReturnCW Continuous WaveD/C Down ConverterdB DecibelsdBc Decibels referred to carrierdBm Decibels referred to 1.0 milliwattDC Direct Current

DCA Down Converter AttenuationDCF Down Converter FrequencyDCT Down Converter TemperatureDL Down Link Fault

DLA Down Link Fault — Unit ADLB Down Link Fault — Unit B

Glossary High-Power TWTA Satellite Terminals

g–2 Rev. 1

DLD Down Converter Lock Detect FaultDLM Down Link Mode (Auto or Manual)DLS Down Link Switch (A or B)DTM Down Converter Tuning Voltage FaultEIRP Equivalent Isotropically Radiated PowerEN Enable

ERR ErrorESC EscapeESD Electro Static DischargeEXE ExecutableFLT Fault

g Gravimetric UnitsG/T Gain Over TemperatureGHz Gigahertz (109 Hertz)GND GroundHPA High-Power AmplifierHPT HPA TemperatureHPV HPA Internal 12 VDC Power

HPWR High PowerHV High VoltageHz Hertz (cycle per second)IF Intermediate Frequency

IF TUN Intermediate Frequency TuningILD IF LO Lock Detect FaultI/O Input/OutputINI InitializeITM IF LO Tuning Voltage Fault

k kilo (103)K Kelvin

KΩ kilo-ohmskbit/s Kilobits per second (103 bits per second)kHz Kilohertz (103 Hertz)LCD Liquid Crystal DisplayLED Light Emitting DiodeLFE LNA Fault EnableLK Lock

LNA Low Noise AmplifierLO Local Oscillator

LSG Large Signalm milli (10-3)

M&C Monitor and ControlmA MilliampMax Maximum

Mbit/s Megabits per secondMHz Megahertz (106 Hertz)

MIL-STD Military StandardsMin Minimum or Minute

MTBV Mean Time Between FailureN/C No Connectns Nanosecond (10-9 second)

ODU Outdoor UnitP-P Peak-to-PeakP05 Internal 5 VDC Power FaultP32 Internal 32 VDC Power FaultPC Printed Circuit

PLO Phase Locked OscillatorP/N Pin Number or Part Number

High-Power TWTA Satellite Terminals Glossary

Rev. 1 g–3

PROG ProgramPS Power Supply

PSIG Pressure per Square Inch GuageRAM Random Access MemoryREF ReferenceRF Radio FrequencyRF Radio FrequencyRFJ Reference Frequency Adjust (10 MHz)

RFRF RF OutputRFT Radio Frequency TerminalRH Relative Humidity

RMA Return Material AuthorizationRST Restart FaultRSU Redundancy Switch UnitRX Receive (Receiver)SEL SelectSSG Small Signal

SSPA Solid State Power AmplifierTBD To Be DeterminedTDV Down Converter Tuning VoltageTIV IF LO Tuning VoltageTRF Transmit Reject FilterTUV Up Converter Tuning VoltageTWT Traveling Wave Tube

TWTA Traveling Wave Tube AmplifierTX Transmit (Transmitter)U/C Up Converter

U/C TUN Up Converter TuningUCA UP Converter AttenuationUCF Up Converter FrequencyUCT Up Converter TemperatureUL Up Link Fault

ULA Up Link Fault — Unit AULB Up Link Fault — Unit BULD Up Converter Lock Detect FaultULM Up Link Mode (Auto or Manual)ULS Up Link Switch (A or B)UPS Uninteruptable Power SupplyUTM Up Converter Tuning Voltage Fault

V VoltsVAC Volts, Alternating CurrentVDC Volts, Direct CurrentVSAT Very Small Aperture TerminalVSWR Voltage Standing Wave Ration

W WattWRM WarmXFE External Fault EnableXVA External Input Power from Unit AXVB External Input Power from Unit B

Glossary High-Power TWTA Satellite Terminals

g–4 Rev. 1


Rev. 1 i–1

I Index

Address Byte, 2–25, 3–28Analog, A–2, A–4, A–6Analog Status Circuits, 2–18, 2–19, 2–23, 2–24, 2–32, 2–

35, 2–36, 3–33, 4–7ASCII Reference Information, 2–19, 2–23, 2–32, 2–35Auxiliary Interface, A–8Basic Controls and Indicators, 3–32, 3–33Cabinet Slide Assembly, 6–4Check Byte, 3–25Clearing a Fault, A–5, A–6Clearing a Fault-LOCAL Control Configuration, 5–10Command Message Format, A–4Command Reject Argument, A–3Communication Protocols, A–7Component Descriptions, A–2, A–3Control and Status Interface, 1–7, 1–10, 1–11, 2–18, 2–20,

2–21, 2–22, 2–24, 2–31, 2–32, 2–33, 2–36, 3–27, 3–30,3–33, 4–2, 4–5, 5–3, 5–7, 5–10, 6–4, A–10, A–13, A–17

Control and Status Signals, 4–2Control Interfaces, 4–5Control/Status Ground Isolation, 2–20, 2–32, 2–33Controller Control Commands, 2–24Controller Query Commands, A–13Controls and Indicators, A–11Digital Status, 5–3, 6–4Digital Status Circuits, 2–19, 2–21, 2–32, 2–33, 4–6Environment, 2–19, 2–21, 2–32, 2–33External Interlock/Remote Functions, 2–31Fault Reset Push Button Switch, 2–18, 2–20, 2–21, 2–22,

2–32, 2–33, 2–34, 2–36, 3–33, 4–2, 4–4, 4–5, 4–6, 4–7,5–5, 5–10, 6–8, A–13, A–15, A–16, A–17, A–18

Heater Delay, A–3, A–6High Voltage ON, 2–18, 2–20, 2–36, 3–33, 4–2, 4–3, 4–5Included Parts, 2–3Initial Power-On, 2–3

Introduction, 2–3Lamp Test Push Button Switch, 2–3LOCAL Control Configuration, 6–8Local Controller Mode, 5–3, 5–10Local Controls and Indicators, 6–9Local/Remote Push Button Switch, 6–4Low-Noise Amplifier (LNA) Assembly, 6–5Manual or Automatic Switching, 4–10, 5–9Manual/Automatic Push Button Switch, 6–4Mechanical, 6–6Normal Operation, 2–30, 2–36, 3–23Operating Modes, 2–36Operation and Control, 1–6, 1–7, 1–12, 2–1, 2–3, 2–25, 2–

26, 3–1, 3–3, 4–2, 6–3, 6–4, 6–9, 6–10Operator Troubleshooting, 4–2Output Voltage Circuits, 5–9Overview, 2–19, 2–24, 2–32, 2–35Parameters, 6–2, A–1Parity, A–4, A–6, A–17Performance, A–5, A–7, A–11, A–15, A–16Power-On Sequence, 6–4, 6–5Preventive Maintenance, 5–9Prime Power, A–2, A–4Receive, 1–6Redundant System Command Set, 1–12Remote Control Serial Interface, 5–3, 5–10Response Byte, 6–9RF Output (J5), A–6RF TX Sample (J4), 2–26Secondary Address Byte, 2–9, 3–11Spar Installation, 4–9Specifications, 3–14Square Pole, 3–14Standard Connections, 2–13, 3–14System Interface, 2–18, 2–20, 2–32, 2–34, 2–36, 3–33, 4–

2, 4–3, 4–5, 6–3, 6–4, 6–7, A–11, A–13, A–15

Index High Power TWTA Satellite Terminals

i–2 Rev. 1

Tools Required, 2–28, 3–15TWTA Command Set, 1–4TWTA Installation, A–17TWTA Monitor & Control (J1), 1–7TWTA Query Commands, 2–25

TWTA Setup for Redundant System Operation, 3–29User Operational Choices, 2–2Warm-Standby or Hot-Standby, 2–9, 3–11Waveguide Switch #1, 2–27, 3–29, 6–4, 6–8, A–11, A–13Waveguide Switch Position Indicators, 3–29