usman 1006 1008 gps v5m - wordpress.com · polynet ltd. sz l u. 35. h-1034 budapest; hungary...

PolyNet Ltd. Szőlő u. 35. H-1034 Budapest; Hungary Phone/Fax: +361 250 7726; Post Address: H-1300 Budapest 3,

P.O.B. 124 Hungary http://www.polynet.hu; e-mail: [email protected]

Synchronization Equipment for Telecommunications Network

PW 1006 U

Upgradeable GPS based Sync Source

User Manual

PW 1006 5; February 2008

PW 1006 U PolyNet

2 All rights reserved. Passing and copying of this document, use and communication of its content not permitted without written authorization from PolyNet Ltd.

PW 1006 5

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PolyNet PW 1006 U

PW 1006 5 All rights reserved. Passing and copying of this document, use and communication of its content not permitted without written authorization from PolyNet Ltd.

3

Publication History If this document is revised, the revision, date, and description of the changes will appear in the table below.

IPW 1006e/Revision Number

Date Reason

01 01. 02. 2003. Initial release of documentation 02 15. 04. 2004. Revised version 03 10. 07. 2005. New card and software versions 04 07. 10. 2007. Revised version 05 15. 02. 2008. New functions descriptions of GPS-4

The specifications and information regarding the product in this Manual are subject to change without notice. All statements, information, and recommendations in this manual are believed to be accurate but are presented without warranty of any kind, express or implied. Users must take full responsibility for their application of any product.

The software license and limited warranty for the accompanying product are set forth in the information packet that shipped with the product that and are incorporated herein by this reference. If you are unable to locate the software license or limited warranty, contact PolyNet Ltd. for a copy.

In no event shall PolyNet or its suppliers be liable for any indirect, special, consequential, or incidental damages, including, without limitation, lost profits or loss or damage to data arising out of the use or inability to use this manual, even if PolyNet or its suppliers have been advised of the possibility of such damage.

PolyNet PW 1006 U GPS System User Manual Copyright © 2005, PolyNet Ltd. All rights reserved.

Purpose of This Publication

This manual provides operation, installation and test procedures for the PW 1006 U and the GPS part of PW 1006/1008system subracks and modules common to all PW 1006/1008systems. Information regarding safety, unpacking, storage, and handling is also included.

Note: The safety information in the “Safety Precautions” must be read and understood by all personnel who work on the PW 1006/1008 system. This publication is intended for the following personnel:

− Installation technicians − Maintenance technicians − Repair technicians

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Table of Contents 1. PRIOR SWITCH ON...................................................................................................................................8

1.1 GENERAL SAFETY PRECAUTIONS...........................................................................................................8 1.2 ELECTRICAL SAFETY PRECAUTIONS ......................................................................................................8 1.3 GROUNDING ..........................................................................................................................................9 1.4 ESD PRECAUTIONS ...............................................................................................................................9 1.5 MOUNTING THE EQUIPMENT ..................................................................................................................9

1.5.1 Site Verification ...............................................................................................................................9 1.5.2 Space requirement for equipment installation ...............................................................................10

1.6 PHYSICAL CHARACTERISTIC ................................................................................................................11 1.7 GENERAL AND ENVIRONMENTAL PARAMETERS ...................................................................................11

1.7.1 General and environmental parameters to PW 1006/1008 equipment..........................................11 1.7.2 General and environmental parameters to GPS-OD and GPS HD outdoor unit of equipment ....12

1.8 CARD POSITIONS OF FULL EQUIPPED PW 1008 OR FULL UPGRADED PW 1006 .....................................12

2. GENERAL DESCRIPTION OF PW 1006 WITHOUT ANY UPGRADE............................................13 2.1 PW 1006 U BLOCK DIAGRAM ..............................................................................................................16 2.2 POWERING...........................................................................................................................................16

3. SUBSYSTEMS ...........................................................................................................................................17 3.1 GPS OUTDOOR UNIT (GPS-OD OR GPS-HD) .....................................................................................17

3.1.1 Introduction ...................................................................................................................................17 3.1.2 Installation and location................................................................................................................19 3.1.3 Cables, wiring of connectors .........................................................................................................19

3.2 GPS INDOOR CARD (GPS-3 AND GPS-4) .............................................................................................20 3.2.1 Introduction ...................................................................................................................................20 3.2.2 Front panel indicators ...................................................................................................................22 3.2.3 Jumper settings ..............................................................................................................................25 3.2.4 Using the GPS receiver control software.......................................................................................25

3.3 PW 1006 INPUT UNIT (INP-2)..............................................................................................................35 3.3.1 Description ....................................................................................................................................35 3.3.2 Front panel signals ........................................................................................................................35 3.3.3 Technical parameters ....................................................................................................................36 3.3.4 Jumper set-up.................................................................................................................................36

3.4 CLOCK SIGNAL DISTRIBUTION CARDS (OUT-N) ...................................................................................37 3.4.1 Description ....................................................................................................................................37 3.4.2 Front panel signals ........................................................................................................................39 3.4.3 Technical parameters ....................................................................................................................40 3.4.4 Connectors.....................................................................................................................................40

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3.4.5 Jumper set-up ................................................................................................................................ 41 3.5 SYNCHRONIZING SIGNAL DISTRIBUTION CARD (OUT-4) ...................................................................... 42

3.5.1 Front panel signals........................................................................................................................ 43 3.5.2 Technical data ............................................................................................................................... 44 3.5.3 Connectors..................................................................................................................................... 44 3.5.4 Jumper settings .............................................................................................................................. 44

3.6 PW 1006 / PW 1008 ALARM CARD (ALR-3)....................................................................................... 47 3.6.1 Introduction ................................................................................................................................... 47 3.6.2 Front panel indicators ................................................................................................................... 48 3.6.3 Connection of the alarm connector ............................................................................................... 48 3.6.4 Technical data ............................................................................................................................... 49 3.6.5 Jumper settings .............................................................................................................................. 50 3.6.6 Using the SW-ALR software .......................................................................................................... 50

3.7 POWER SUPPLY FILTERING CARD (FLT-1) ........................................................................................... 60 3.7.1 Description .................................................................................................................................... 60 3.7.2 Front panel signals........................................................................................................................ 61 3.7.3 Connectors..................................................................................................................................... 61 3.7.4 Technical parameters .................................................................................................................... 61 3.7.5 Jumper set-up ................................................................................................................................ 62

3.8 POWER SUPPLY (PWR-2 AND PWR-3) ................................................................................................ 62 3.8.1 Description .................................................................................................................................... 62 3.8.2 Front panel lamps.......................................................................................................................... 63 3.8.3 Technical parameters .................................................................................................................... 63

4. INSTALLATION HINTS.......................................................................................................................... 64 4.1 GPS HEAD CABLING, LIGHTNING PROTECTION..................................................................................... 64 4.2 TYPICAL GPS-OD AND GPS-HD HEAD INSTALLATION MODES ........................................................... 65

4.2.1 Installation to 2” or higher size fixing rods .................................................................................. 65 4.2.2 GPS receiver fixing to 5/4” size rod.............................................................................................. 65 4.2.3 GPS receiver fixing to balcony or roof grid .................................................................................. 66 4.2.4 GPS receiver installation to a horizontal element of microwave / GSM tower ............................. 67 4.2.5 GPS receiver wall mount ............................................................................................................... 68

4.3 TYPICAL INSTALLATION SET FOR GPS-OD INSTALLATION................................................................... 69 4.4 CABLES FOR GPS HEAD CONNECTION ................................................................................................. 70

4.4.1 GPS head outdoor cable................................................................................................................ 70 4.4.2 GPS head indoor cables ................................................................................................................ 71

4.5 TYPICAL CABLES FOR PW 1006 EXTERNAL CONNECTIONS.................................................................. 71 4.6 TYPICAL INSTALLATION SET FOR PW 1006/1008INSTALLATION.......................................................... 81

5. ABBREVIATIONS .................................................................................................................................... 82

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List of Figures

Figure 1. Mounting to 19” size rack.........................................................................................10

Figure 2. Main parameters of subrack......................................................................................11

Figure 3. Slots allocations........................................................................................................12

Figure 4. PW 1006 U block diagram without any upgrade......................................................16

Figure 5. GPS outdoor unit versions.........................................................................................18

Figure 6. Various installation and location possibilities of GPS outdoor unit..........................19

Figure 7. GPS-3 and GPS-4 indoor unit ...................................................................................21

Figure 8. Graphical User Interface of the GPS control software ..............................................26

Figure 9. Typical start-up process following switch-on............................................................30

Figure 10. Uploading of Log from the GPS-3 card...................................................................33

Figure 11. Format of a Log file .................................................................................................34

Figure 12. PW 1006 input unit..................................................................................................35

Figure 13. OUT-1 and OUT-2 cards .........................................................................................38

Figure 14. OUT-3 card..............................................................................................................39

Figure 15. Wiring of OUT-1 and OUT-2 output connectors ....................................................41

Figure 16. Block diagram and front panel view of the OUT-4 synchronising signal distribution card....................................................................................................................................43

Figure 17. Block diagram and front panel scheme of the ALR-3 alarm card ...........................48

Figure 18. Connection of the alarm connector..........................................................................49

Figure 19. PW 1006-ALR screen..............................................................................................51

Figure 20. Screen of Monitoring mode of operation.................................................................55

Figure 21. Displaying of Log on the screen ..............................................................................57

Figure 22. Example for the displaying of logged alarms ..........................................................58

Figure 23. Communication messages .......................................................................................59

Figure 24. Power supply filtering card......................................................................................60

Figure 25. Pin assignment of the power port connector............................................................61

Figure 26. Power supply card....................................................................................................63

Figure 27. Lightning protection of GPS-OD unit .....................................................................64

Figure 28. Typical GPS-OD installation; allowable shadow ....................................................65

Figure 29. Fixing to 5/4” size antenna rod................................................................................66

Figure 30. GPS-OD installation fixed to balcony or roof grid..................................................66

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Figure 31. GPS-OD installation mounted on antenna tower ....................................................67

Figure 32. Wall mounted GPS-OD installation........................................................................68

Figure 33. GPS-OD to VIL-1 patch cable ................................................................................70

Figure 34. Indoor cables wiring................................................................................................71

Figure 35. Output cable for OUT-1 and OUT-2 card with 1/2.3 plug......................................71

Figure 36. Output cable for OUT-1 and OUT-2 card with 120 ohm balanced connection ......72

Figure 37. Output cable for OUT-1 and OUT-2 card with 120 ohm balanced connection to ADR 155C to 1500 equipment .........................................................................................73

Figure 38. Output cable for OUT-3 and OUT-4 card or for direct GPS card output connection for UMUX (FUX-U) equipment COBUX card................................................................74

Figure 39. Power cable .............................................................................................................74

Figure 40. Alarm cable general.................................................................................................75

Figure 41. Alarm cable to SAGEM ADR family multiplexer. Partial service .........................76

Figure 42. Alarm cable to Alcatel Optinex family multiplexer. Partial service .......................77

Figure 43. Alarm cable to Alcatel Optinex family multiplexer. Full service ...........................78

Figure 44. Alarm cable to Alcatel 1551/1561 SM multiplexer ................................................79

Figure 45. Alarm cable to Nortel TN-4x, TN-16x multiplexer ................................................80

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1. Prior Switch On

1.1 General Safety Precautions The following general safety precautions are not related to any specific procedures and do not appear elsewhere in this publication. These are recommended precautions that personnel must understand and apply during installation, testing, and use of the PolyNet PW 1006/1008 system.

− Know and understand electrical safety, wiring, and connection practices.

− Be familiar with modern methods of resuscitation. This information can be obtained from the Red Cross or its local equivalent. This knowledge is imperative for personnel working with or near equipment with voltage levels capable of causing injury or death.

The following general safety precautions must be observed during all phases of the operation of any parts of the equipment. Failure to comply with these precautions violates safety standards and intended use of the equipment PolyNet PW 1006 no liability for the customer’s failure to comply with these requirements.

DO NOT INSTALL AND OPERATE THE EQUIPMENT IN THE PRESENCE OF FLAMMABLE GASES OR FUMES.

THIS EQUIPMENT CAN BE POWERED WITH VOLTAGES 48 V NOMINAL (40.5 TO 60V). BEAWARE OF THE REQUIRED SAFETY PRECAUTIONS.

1.2 Electrical Safety Precautions The following electrical safety precautions, procedures, and rules are required when working on the PolyNet PW 1006/1008 system:

− The PolyNet PW 1006/1008 system must be connected to a power supply that never exceeds voltage limits.

− The PolyNet PW 1006/1008system power must be supplied by a power supply system with reinforced insulation.

− The PolyNet PW 1006/1008system must be installed and used in a controlled access location. Access must be limited to service personnel and users that have been instructed about the reasons for the controlled access and any precautions that must be taken.

− Touching electrical connectors or other exposed electrical circuitry inside the system subracks can cause injury to personnel.

− A disconnection device (fuse or circuit breaker) must be present on the power supply line. The power supply line fuse must be removed or the breaker switched off before power wiring.

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− The power supply line fuse must be removed or the circuit breaker must be switched off before disconnecting the earth ground for maintenance or installation purposes.

− Do not touch anything inside the subrack or introduce anything into the subrack (except modules) when it is turned ON. If module removal is necessary, replace the empty slot with a blank panel immediately.

− All PolyNet PW 1006/1008 system electrical interfaces are intended to be connected to local devices, that is, devices in the same room or in the same building as the PW 1006/1008system (not in unprotected environments).

1.3 Grounding

THE SAFETY GROUND CONNECTION IS PROVIDED ON THE EQUIPMENT BACK PANEL. THIS POINT MUST BE CONNECTED TO THE COMMON GROUND CONNECTORS OF RACK PRIOR STARTING INSTALLATION OF GPS RECEIVER AND CONNECTING EQUIPMENT POWER CABLES.

1.4 ESD Precautions Some PolyNet PW 1006/1008 components are classified as Class 0 ESD-sensitive devices. Follow these rules when handling ESD-sensitive devices:

− In the PW 1006 equipment used all solid-state electronic devices are ESD-sensitive.

− Use a grounded wrist strap (or equivalent equipment) while working with ESD-sensitive devices.

− Transport, store, and handle ESD-sensitive devices in static-safe environments.

1.5 Mounting the equipment

1.5.1 Site Verification Before beginning the installation, ensure that the intended site for the PW 1006/1008 system subracks meets minimum requirements. Proper installation of the subracks depends on the following items:

− The site must conform to all environmental specifications in the PolyNet PW 1006/1008 system technical specifications.

− Equipment racks in which the PolyNet PW 1006/1008 system subracks are to be installed must be properly mounted according to the manufacturer's directions. In addition, all equipment racks must be level to ensure proper installation and operation.

− Subracks are designed to fit into standard 19”, 600 mm x 300 mm or 600 mm x 600 mm outer dimensions equipment racks.

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− Determine wire size for power and ground wiring based on cable length and the National Installation standards (local engineering standards and practices). Power and grounding wire must be capable of handling the power requirements for the entire system.

− These procedures assume that the front of the equipment racks face to the aisle and that battery power cables enter from the right.

− Plan power cable runs from the power distribution bay (PDB) to the power distribution panel(s) (PDP) located in the equipment racks. Then plan the power cable runs from the PDP to the individual subracks, proceeding down along the right side of the equipment bay. Enter the subrack connector through the right side of the equipment.

− Plan grounding cable runs from the ground window down along the right side of the rack and to the rear of the subracks.

− The installation location must accommodate the heat dissipation requirements of each site type to be installed.

− The minimum clearances must be provided for front access to bays, and clearing the top of the bay. The clearances are minimum 80 cm.

1.5.2 Space requirement for equipment installation

PW 1006 / 10083U

PW 1006 / 10083U

Other equipment

Other equipment

1U

1U

1U

19" size rack

1U min. space for cooling

Horizontal cable tidyRing or comb panel

for cable routing (1U)

Full space rquirementinstalling one PW 1006/1008 is:6U=266,7mm

1U=44.45mm (1.3/4")

Figure 1. Mounting to 19” size rack

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1.6 Physical characteristic The PW 1006 is a 3U high and 19” wide subrack. The main parameters of subrack can be seen in Figure 2.

483

132,

5

57

465

448

230

Figure 2. Main parameters of subrack

1.7 General and environmental parameters

1.7.1 General and environmental parameters to PW 1006/1008 equipment

Power supply and consumption: -40.5…-60 Vdc 80 W max. (PW 1008 HG with

Rubidium reference) 20 W max. PW 1008 OG / PW1006 U

Dimensions: W 448 mm; H 133 mm; D 271 mm

Weight: 7.5 kg (Full equipped with Rubidium reference)

3 kg PW 1006 U

Protection class: IP 20

Operating conditions: According to EN 300 019-1-3:2003 Class 3.1 Operating temperature range: +5° C to +40° C Relative humidity range: 5…85%

Storage conditions: According to EN 300 019-1-1:2003 Class 1.2 Storage temperature range: -25° C to +55° C Relative humidity range: 10…100%

Transport conditions: According to ETS 300 019-1-2:2003 Class 2.3 Transport temperature range: -40° C to +70° C Relative humidity range: 10…100%

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1.7.2 General and environmental parameters to GPS-OD and GPS HD outdoor unit of equipment

Power supply and consumption: -40,5…-60 Vdc 7 W max. GPS-OD from GPS-3 card

-18…-36 Vdc 7 W max. GPS-HD from GPS-4 card

Dimensions: Diameter 75 x 300mm

Weight: 1 kg

Protection class: IP 67

Operating conditions: According to EN 300 019-1-4:2003 Class 4.2H Operating temperature range: -20° C to +55° C Relative humidity range: 5…100%

Storage conditions: According to EN 300 019-1-1:2003 Class 1.2 Storage temperature range: -25° C to +55° C Relative humidity range: 10…100%

Transport conditions: According to ETS 300 019-1-2:2003 Class 2.3 Transport temperature range: -40° C to +70° C Relative humidity range: 10…100%

1.8 Card positions of full equipped PW 1008 or full upgraded PW 1006

Card place number1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

2,048 MHzinput

2,048 Mbit/sinput

INP-1

2,048 MHzinput

2,048 Mbit/sinput

INP-1

2,048 MHzinput

2,048 Mbit/sinput

INP-1

2,048 MHzinput

2,048 Mbit/sinput

INP-1 RUB-1

1-2

3-4

5-6

Clockoutputs

OUT-1

1-2

3-4

5-6

Clockoutputs

OUT-1

1-2

3-4

5-6

Clockoutputs

OUT-1

1-2

3-4

5-6

Clockoutputs

OUT-1 FLT-1

PC

CPU-3 PLL -2 ALR-3

Ala

rmco

ntac

tsPC

Alarms

Figure 3. Slots allocations

The GPS, CPU, ALR, FLT, and PWR cards position is fixed. In the INP and OUT area there are 4-4 card positions for individual use. The number of INP and OUT cards can be one to four independently. The different type of OUT cards can be placed freely at OUT area.

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2. General Description of PW 1006 without any upgrade

The PW 1006 equipment can be equipped by using GPS-OD outdoor unit with GPS-3 indoor card in operational pair, or by using GPS-HD outdoor unit with GPS-4 indoor card as operational pair. Selecting different pairs as GPS-OD with GPS-4 card or GPS-HD with GPS-3 card is not allowed because of different operational modes and different head powering voltages.

Features:

− Basic set: GPS head and indoor card with power supply

− SSU quality output in GPS locked state (GPS-OD head and GPS-3 card)

− PRC quality output in GPS locked state (GPS-HD head and GPS-4 card)

− Upgradeability even under operation

− Modular design and scalability

− Cat-5 outdoor cable for GPS head connection up to 100 m length

− Duplicated powering

− Low power consumption, reliable operation, simple maintenance

GPS receiver outdoor unit (GPS-OD) GPS receiver: 12 channel C/A code receiver

Receiver frequency: L1 carrier, 1575.42 MHz

Updating frequency: 1 Hz

1 PPS output accuracy: ±180 ns

Interface: RS-485 (data, 1 PPS, configuration)

Power supply: -36…-72 Vdc

Environment: -25…+70ºC; IP 67

Dimensions, weight: Ø75 x 300 mm; 1 kg

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GPS receiver indoor card (GPS-3) Interface to the GPS-OD head:

RS-485 (data, 1 PPS, GPS head configuration)

Power supply to the head: Subrack input Voltage -2V, (150 mA current limited)

PC connection RS 232; 115,2 kbps, 8/1/N

Output: 2.048 MHz, G.703, 75 ohm

Accuracy: ±1x10-11 1 day average in locked state

Stability in locked state: MTIE: EN 300 462-3-1 (1998-05), Figure 5. TDEV: EN 300 462-3-1 (1998-05), Figure 6. Holdover time: 10 minutes 2000ns

2.048 MHz output connector: 1.6/5.6 female coax

GPS receiver outdoor unit (GPS-HD)

GPS receiver: 12 channel C/A code receiver

Receiver frequency: L1 carrier, 1575.42 MHz

Updating frequency: 1 Hz

1 PPS output accuracy: 30 ns rms, <5ns resolution

Interface to GPS-4 indoor card:

RS-485 (satellite data output, clock output, 1 PPS output, configuration input)

Power supply: -18…-36 Vdc

Environment: -25…+70ºC; IP 67

Dimensions, weight: Ø75 x 300 mm; 1 kg

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GPS receiver indoor card (GPS-4) Interface to the GPS-HD head: RS-485 (Satellite data reception, clock reception 1

PPS reception, GPS Head configuration download to head)

Power supply to the head: 30V (300 mA current limited)

PC connection RS 232; 115.2 kbps, 8/1/N

Output: 2.048 MHz, G.703, 75 ohm

Accuracy: ±1x10-11 One day average in GPS locked state

Stability in GPS locked state: MTIE: EN 300 462-6-1 (1998-05), Figure 1. ITU-T G.811 (09/97) Figure 1 TDEV: EN 300 462-6-1 (1998-05), Figure 2. ITU-T G.811 (09/97) Figure 2

Holdover time from GPS invalid state to timing output squelched:

Preselectable:

10 minutes max 2000ns deviation 3 hours max 5E-8 frequency offset

2.048 MHz output connector: 1.6/5.6 female coax

Software and PC requirements

GPS unit Controlling software (SW-GPS)

For controlling GPS unit working conditions and reading the GPS unit log records.

ALR software (SW-ALR)

For display the PW 1006/1008 alarms, configuring the alarm severities, reading the equipment alarm log records.

ClockView for centralized supervision (SW CW)

For centralized supervision trough the IP network using the SW-GPS, SW-ALR software.

PC hardware Pentium 4, 1 GB RAM, 30 GB HDD, Ethernet port, COM or USB port, MS Win 2000 or MS XP Professional operating system

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2.1 PW 1006 U block diagram

V.24 V.24

GPS-3or GPS-4

card

Power supply

Power supply

2,048 MHz out GPS-ODor

GPS-HD

48V

48V

Power filterAlarm card

Subrack alarms

Floatingalarm contacts

-48V 1.

-48V 2.

Figure 4. PW 1006 U block diagram without any upgrade

2.2 Powering

Single or dual feeding by duplicated source. One of the two power supply is sufficient for heating up and for operation even in full upgrade.

Input Voltage: -40.5 to -60 Vdc

Max. power consumption: Without any upgrade 15-20 W

With full upgrade warm-up 80 W

Typical power consumption: 25-35 W (Full upgrade after warm-up)

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3. Subsystems

3.1 GPS Outdoor unit (GPS-OD or GPS-HD) The PW 1006 equipment can be equipped by using GPS-OD outdoor unit with GPS-3 indoor card in operational pair, or by using GPS-HD outdoor unit with GPS-4 indoor card as operational pair. Selecting different pairs as GPS-OD with GPS-4 card or GPS-HD with GPS-3 card is not allowed because of different operational modes and different head powering voltages.

3.1.1 Introduction The GPS outdoor unit (GPS-OD/HD) receives the satellite information necessary for the GPS and time determination function via its active, wide-angle antenna located under its protecting cone. The GPS receiver built into the outdoor unit is a 12-channel receiver performing the reception of L1 frequency, as well as the GPS and time determination functions. In addition, the outdoor unit includes the power supply unit feeding the GPS-OD/HD, the RS-485 receiver-transmitters that transform the binary data signals of the GPS receiver into line signals and also the surge voltage protection of the cable connectors.

The evaluation and processing of the information provided by the GPS-OD is performed only by the indoor GPS-3 card.

The evaluation and processing of the information provided by the GPS-HD is performed only by the indoor GPS-4 card.

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View of GPS-OD or GPS-HD

GPS receivermodule

Active antenna

Binary data

1pps

RS-485 transcivers

48/5VDC/DC5V S

urge

volta

gepr

otec

tion RS-485 data

RS-485 1pps

48V

Con

nect

ion

bya

CAT

-5ca

ble

toth

eG

PS-3

indo

orun

it

Block diagram of GPS OD

View of GPS-OD or GPS-HD

GPS receivermodul

Active antenna

Binary data

1pps

2,048 MHz 2,048 MHz

RS-485 transcivers

24/3,3VDC/DC3,3V O

verv

olta

gepr

otec

tion RS-485 adat

RS-485 1pps

24V

Con

nect

ion

toG

PS-4

indo

orC

AT-5

inte

rcon

nect

ion

cabl

e

Block diagram of GPS HD

Figure 5. GPS outdoor unit versions, GPS-OD and GPS-HD

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3.1.2 Installation and location The GPS antenna must be installed in a favorable area to receive the radio signals from the satellites. Select an outdoor location with relatively unobstructed view – round view – to the horizon. The maximum length of GPS-OD/HD to GPS-3/4 card Cat5 cable can be 250 meters.

Protect the GPS head against lightning in case of thunderstorms if necessary.

On a sample to Europe, the good or bad location facilities can be seen on Figure 6.

Pos1

Pos1

Pos1

Pos2

SouthNorth

Pos4

Pos4

Pos3

Pos3

Figure 6. Various installation and location possibilities of GPS outdoor unit

Position 1 Usually there are no restrictions to the horizon and up to 6 – 12 satellites could be received continuously. This position guarantees a very good reception of GPS signals.

Position 2 This position is good enough to receive all necessary satellites for system operation.

Position 3 This position is not recommended for continuous system operation. If the constellation of the GPS satellites is unfavorable according to the position of the antenna, the GPS reception breaks down and for this time after the holdover delay the GPS-3 or GPS-4 card disables the output frequency.

Position 4 This position is not suitable for system operation. In worse case no satellite could be received. The GPS-3/4 card continuously disables the output frequency.

3.1.3 Cables, wiring of connectors The head is connected via an 8+1 pin, cylindrical screw-plug. The connection of the 8+1 pin plug of the head is made according to the Table 1.

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Pin No. Denomination Remark

1 -48/-30V RTN Supply voltage, returning branch

2 Data In B Configuration data input -

3 Data Out B Data output -

4 1 pps Out B Pulse per second output -

5 1 pps Out A Pulse per second output +

6 -48/-30V Supply voltage, feeding branch

7 Data In A Configuration data input +

8 Data Out A Data output +

9 GND Ground and shielding

Table 1. Wiring of GPS-OD/HD connector

The power returning branch in the head and in the head cabling is independent of ground. The wiring scheme from GPS head to PW 1006 can be seen in Section 4 “Installation hints”.

3.2 GPS indoor card (GPS-3 and GPS-4)

The PW 1006 equipment can be equipped by using GPS-OD outdoor unit with GPS-3 indoor card in operational pair, or by using GPS-HD outdoor unit with GPS-4 indoor card as operational pair. Selecting different pairs as GPS-OD with GPS-4 card or GPS-HD with GPS-3 card is not allowed because of different operational modes and different head powering voltages.

3.2.1 Introduction The GPS-3 indoor GPS receiver card performs the processing of the data and time signals arriving from the GPS-OD outdoor unit.

The GPS-4 indoor GPS receiver card performs the processing of the data and time signals arriving from the GPS-HD outdoor unit.

The main function of the indoor card is to produce with the GPS timer synchronized 2.048 MHz time signal output and to provide time stamp for the time code source. This latter function is not used in the PW 1006 equipment. There is a serial port connection on the card for the purpose of controlling the GPS reception, the synchronization and the operating statuses. The SW-GPS controlling PC software can communicate with the card via this port. The block diagram and the front panel of the GPS-3 unit are shown on Figure 7.

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2,04

8M

Hz

out

2.04

8M

Hz

sync

hron

stat

us

2,04

8M

Hz

outp

ut

GPS

-OD

pow

eron

V.24

conn

ectio

nto

PC

9p.f

emal

eC

onne

ctio

nto

GPS

-OD

outd

ooru

nuit

9p.m

ale

GPS-3 or 4 GPS indoor unit – Front

panel

Bináry data

1pps

RS-485 transcivers

RS-485 data

RS-485 1pps

48VCon

nect

ion

toC

AT-5

cabl

eto

GP

She

ad

PC connectionRDTD

48V subrack powerCurrentlimiter

Phasecontrol

Frequencycontrol

VCTCXO16,384MHz

Car

dco

ntro

ller

1/8 2,048MHzG.703-13

Status

Head PWR

GPS alarm to subrack

Restart

Block diagram of GPS-3 indoor unit

2,04

8M

Hz

out

2.04

8M

Hz

sync

hron

stat

us

2,04

8M

Hz

outp

ut

GPS

-OD

pow

eron

V.24

conn

ectio

nto

PC

9p.f

emal

eC

onne

ctio

nto

GPS

-OD

outd

ooru

nuit

9p.m

ale

GPS-3 or 4 GPS indoor unit – Front

panel

Bináry data

1pps

RS-485 transcivers

RS-485 data

RS-485 1pps

30V

Con

nect

ion

toC

AT-5

cabl

eto

GPS

head

PC connectionRDTD

48V subrack powerCurrentlimiter

Phasecontrol

VCTCXO16,384MHz

Car

dco

ntro

ller

1/82,048MHzG.703-13

Status

Head PWR

GPS alarm to subrack

Restart

2,048MHz

Block diagram of GPS-4 indoor unit

Figure 7. GPS-3 and GPS-4 indoor unit

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3.2.2 Front panel indicators There are two indicator (LED) lamps on the GPS-3/4 indoor card, having the meaning of the relevant indications, as follows.

Status lamp (GPS-3) Dark: The card has no supply voltage, or after switch-on or re-start the card is in

reset or faulty status.

Red:

The time stamp and the 2.048 MHz synchronous signal are not valid; the 2.048 MHz output is disabled. There is no GPS reception or the GPS-OD is missing. After the switching on, at the beginning of the set-up or after re-establishment of the GPS reception this indication can be seen for 3-5 min.

Yellow: The time stamp and the 2.048 MHz synchronous signal are not valid; the 2.048 MHz output is disabled. The GPS reception exists already, but the GPS receiver and the synchronization circuits are in synchronizing-up status. If the reception is optimal, this status lasts 2-3 minutes.

Green: The time stamp and the 2.048 MHz synchronous signal are valid; the 2.048 MHz output is enabled. The quality of the GPS reception is appropriate for the synchronization and the setting up is completed (normal status of operation).

Green blinking:

The source of the 2.048 MHz output is in holdover status. Due to a failure, for instance because of the disturbance in the GPS reception, the GPS data is provisionally or permanently invalid. The maximum holdover time is 10 minutes. If the reception and the synchronization within this time frame return to normal operation for at least 1 minute, the operation of the unit becomes normal again and the green LED is on continuously. If the source of the disturbance is not eliminated within the holdover time, the lamp turns to red and the 2.048 MHz output becomes disabled and a new set-up session begins following the re-establishment of the GPS reception.

Status lamp (GPS-4) Dark: The card has no supply voltage, or after switch-on or re-start the card is in

reset or faulty status.

Red:

The time stamp and the 2.048 MHz synchronous signal are not valid; the 2.048 MHz output is disabled. There is no GPS reception or the GPS-HD is missing. After the switching on, at the beginning of the set-up or after re-establishment of the GPS reception this indication can be seen for 3-5 min.

Yellow: The time stamp and the 2.048 MHz synchronous signal are not valid; the 2.048 MHz output is disabled. The GPS reception exists already, but the GPS receiver and the synchronization circuits are in synchronizing-up status Screen message: “Coarse tuning”

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Yellow / Green blinking:

The time stamp and the 2.048 MHz synchronous signal are valid; the 2.048 MHz output is enabled. The quality of the GPS reception is appropriate for the synchronization but the setting up is not completed. The quality of output 2.048 MHz signal quality is varying slowly. If the reception is optimal, this status lasts 16-18 minutes.

Screen message: “Fine tuning”

Green: The time stamp and the 2.048 MHz synchronous signal are valid; the 2.048 MHz output is enabled. The quality of the GPS reception is appropriate for the synchronization and the setting up is completed

Screen message: “Normal tracking”

Green blinking:

The source of the 2.048 MHz output is in holdover status. Due to a failure, for instance because of the disturbance in the GPS reception, the GPS data is provisionally or permanently invalid. If the reception and the synchronization within this time frame return to normal operation for at least 1 minute, the operation of the unit becomes normal again and the green LED is on continuously. If the source of the disturbance is not eliminated within the holdover time, the lamp turns to red and the 2.048 MHz output becomes disabled and a new set-up session begins following the re-establishment of the GPS reception.

Screen message: “Holdover”

The holdover time from GPS failure to output squelched is factory selectable from 10 minutes to 180 minutes. The default value is 10 minutes.

Head PWR lamp (GPS-3/4)

Dark: There is no remote supply voltage that indicates the lack of supply voltage at the card, or malfunctioning of the card, or a supply voltage shortcut in the cabling of the head or in the head itself. If the lamp lights on when the head cable is pulled out from the card, it indicates the existence of the second problem.

Under setting up or under a restarting automatic procedure the head power is switched off to 10 seconds by the GPS-4 card controller. During these 10 seconds the head power lamp is dark. This is a normal operation process, not a failure.

Green: The remote supply voltage of the head is normal.

The GPS-3/4 card is working autonomously, without being connected to the PC controlling the operation. It is not necessary to have the PC permanently connected onto the GPS-3/4 card.

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3.2.2.1 Serial port connection The pin usage of the GPS-3/4 card to the serial port connection to a PC can be seen in the Table 2. A „straight” male-female cable is needed for the connection to the PC and it is sufficient to connect the RX, TX and GND wires. For this control only the “Control” signed 9 pin female is for use.

Pin Nomination Remark

1

2 RX Output

3 TX Input

4 DTR-RI NC

5 GND Signal ground

6

7 RTS-CTS NC

8 RTS-CTS NC

9 DTR-RI NC

Housing Shielding

Table 2. PC serial port connection

The connection of the head of the GPS-OD/HD unit (D-sub male) to the GPS-3/4 card can be seen in the Table 3.


1 PWR RTN Power supply, returning branch (and 2.048 MHz in GPS-4)

2 Data Out B Configuration data output -

3 Data In B Data input -

4 1 pps In B Time input -

5 GND Ground and shielding

6 PWR Power supply, feeding branch (and 2.048 MHz in GPS-4)

7 Data Out A Configuration data output +

8 Data In A Data input +

9 1 pps In A Time input +

Table 3. GPS-OD / HD head connection

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WARNING!

IT IS FORBIDDEN TO CONNECT OTHER UNIT THAN THE CABLE OF THE GPS HEAD INTO THE CONNECTION PORT “TO GPS HEAD” LOCATED ON THE FRONT PANEL OF THE GPS CARD,BECAUSE IT MAY CAUSE SERIOUS DAMAGE TO THE CARD OR THE OTHER EQUIPMENT!

THE ROUGH (VIL-1) AND THE FINE (VIL-2) OVERVOLTAGE PROTECTION DEVICES MUST IN EVERY CASE BE INSERTED INTO THE CABLE CONNECTING THE GPS-OD HEAD AND THE GPS-3/4 CARD.

Please follow the instructions given in the annex of the User Manual for the connection of the cables needed for the cabling of the head, for the lightning protection and for the overvoltage protection solution.

3.2.3 Jumper settings In every case the original, manufacturer's settings should be kept as jumper settings of the GPS-3/4 card. These settings must not be modified by the user, since it results in malfunctioning.

3.2.4 Using the GPS receiver control software

The GPS receiver control software is intended only for display the operation or failures of GPS section. It is not for configure anything, as the GPS section is working totally autonomously, there is no need any user activity for startup or operate.

3.2.4.1 Operating system and hardware environment

The SW-GPS software is running under MS Win95, Win98, WinME, WinNT, Win2000, and WinXP operating systems, however, preferably the using of Win2000 or WinXP Professional operating systems is recommended. The program does not need to be installed only the GPS_Vxx.exe file needs to be run from an optional HDD directory. The program has an English user application interface.

A Pentium 4 category personal computer, equipped with a physical serial port connection, is recommended. For the display settings 1024 x 768 pixels resolution and using at least 256 colors are recommended.

3.2.4.2 Start-up (Commissioning) All and every unit of the PW 1006/1008 equipment, including the GPS-3 or GPS-4 card, is supplied in ready for operation status, with operating parameters pre-set according to the internal configuration and operating environment conditions. So thus, commissioning of the

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equipment does not require else than establishing the necessary station connections and switching on of the device itself.

3.2.4.3 The graphical user interface and the messages of the GPS card control software The GPS receiver (GPS-OD + GPS-3 card or GPS HD + GPS-4 card) operating as part of the PW 1006/1008 equipment, has a fully automated operation; there cannot be commands given to the GPS receiver with the control software, with it there can only the operation be monitored or the navigation data displayed.

The graphical user interface of the GPS control software is shown on Figure 8.

Control area

Displaying area forGPS and satellite data

Status area

Log area

Figure 8. Graphical User Interface of the GPS control software

Having started the program it offers us a well-organised user interface. The screen can actually be divided into four parts:

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− On the upper part of the screen the control area can be found; the menu bar and the series of buttons serve basically for the handling of the program;

− In the middle part of the screen there can be the navigation and satellite data found that come from the GPS head;

− The status information, indicating the status of the 2 MHz output and the actual operating status of the card, can be found also in the middle area of the screen;

− The lower half of the screen is occupied by the LOG area. It is the area where the records generating in the monitoring mode or at the changes in the operating status, or the log records read out from the card's memory, appear.

The size of the screen cannot be altered, because it is not necessary for the displaying of the data.

The color and the meaning of the color appearing in the circle area marked as 2.048 MHz output correspond to the color of the “status” lamp on the front panel of the GPS-3/4 card. In the “Process” message field the status and error indications and messages appear referring to the status of the synchronization and the synchronization process, as it is explained in the Table 4 and Table 5.

Monitoring the GPS-4 card and GPS-HD the LOS (Loss Of Signal) and LOF (Loss Of (2 MHz) Frequency) lamps are active. Red color signs loss of signal or loss of frequency green displays the failure free operation. The “Head current” row of the display area containing the actual head current. The head current nominal value is 43±10 mA

Monitoring the GPS-3 card and GPS-HD head pair this area and the head current value is inactive.

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Message The meaning of the message Type of the message

1PPS missing No 1pps signal is coming from GPS head Error message

1PPS missing (Holdover) No 1pps signal is coming from GPS head and it results in Holdover status

Status/error message

1PPS missing for 60 sec Error message

2 MHz ready Activated output Status message

BOR reset Brown-out reset (the controller unit of the GPS-3 card is kept in reset status in case of low power voltage)

Error message

Coarse tuning Tuning begins, frequency setting Status message

Communication lost Communication is lost between the PC and the GPS-3 card

Error message

Communication lost PC to card communication stopped Error message

DF>+-1 Tuning step Status message

End of holdover Holdover time is ended Status/error message

FC correction, PLL in down Frequency correction by PLL Status message

FC correction, PLL in up Frequency correction by PLL Status message

FC stabilizing Fine tuning Status message

Frequency control out of range Control is out of range Error message

GPS head missing No information received from head direction Error message

GPS head reset No valid data Status message

GPS invalid Invalid GPS reception Status/error message

GPS invalid (Holdover) Invalid GPS reception during Holdover time Status/error message

GPS valid, stabilizing Stabilizing during holdover Status message

Log cleared Log is cleared by manufacturer Status message

LVD reset Low voltage detected reset Error message

MCLR reset Master clear reset (reset button application) Status message

Measuring PIC does not reply Internal failure Error message

Normal tracking Normal mode of operation Status message

PLL stabilizing Phase stabilizing Status message

PLL start Phase regulation starts Status message

POR reset Power-on reset (power is switched on) Status message

Stack overflow Stack overflow Error message

Stack underflow Stack underflow Error message

Starting up Start-up begins Status message

Unknown reset Internal failure Error message

Wait for GPS Wait for „GPS valid” message Status message

WDT reset Watchdog timer reset Error message

Table 4. Status field and Log messages GPS-3 card

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Message The meaning of the message Type of the message

1PPS missing No 1PPS input from head Error message

BOR reset Brown-out reset (the controller unit of the GPS-3 card is kept in reset status in case of low power voltage)

Error message

Coarse tuning Preparation of normal operation Status message

Communication lost Communication is lost between the PC and the GPS-4 card

Error message

End of holdover Holdover time reached, 2MHz output squelched Status message

Fine tuning Preparation of normal operation Status message

GPS head reset Startup clear or automatic repair of operation Error/status message

GPS invalid No valid GPS reception Error/status message

Head current too high Short or failure in head section Error message

Head current too low Head is missing or the head cable failed Error message

Holdover After normal tracking period the GPS reception turned to invalid and the equipment tries to keep the frequency and phase of normal operation

Error/status message

Log cleared Log is cleared by manufacturer Status message

Loss of 2M No input 2MHz from head Error message

Loss of signal No any input from head Error message

LVD reset Low voltage detected reset Error message

MCLR reset Master clear reset (reset button pushed by operator) Status message

NMEA timeout No received data message from head Error message

No GPS 2D 2D message is missing Error message

No GPS 3D 3D message is missing Error message

No head voltage Head power is missing under operation Error message

Normal tracking The message of normal tracking and valid output Status message

POR reset Power-on reset (power is switched on) Status message

Stack overflow Internal failure Error message

Stack underflow Internal failure Error message

Starting up The first period of operation Status message

Starting up timeout Unsuccessful initialization Error message

Unknown reset Internal failure Error message

Unlock The GPS-4 card internal PLL is in unlocked state Error message

Wait for GPS The first period of startup or waiting to GPS return Status/error message

WDT reset Watchdog timer reset Error message

Table 5. Status field and Log messages GPS-4 card

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One of the most important information in the GPS navigation data area is the status of the GPS receiver. If this status is “Invalid”, the up-synchronisation does not take place, or from the synchronised status the 2.048 MHz circuit switches over to holdover. The “Mode” below the time and navigation data shows the quality of the positioning. The “3D” means three- dimensional positioning that can appear only, if the receiver processes the valid signals of minimum 4 satellites. In case of signals received from three satellites, provided that previously the start up took place with the reception of more than four satellites, the positioning will be “2D”, i.e. two-dimensional; no valid altitude data is available. In the (Satellites) table, near to the navigation data, the ID numbers, the positions of the received or on the sky retraceable satellites can be found, along with their relevant signal/noise (S/N) data. In case of partial shadowing, the S/N field is empty for the shadowed satellites. In case of reception of three or less satellites, the start-up is unsuccessful, the navigation data and the satellite position data are missing or are false.

The Figure 9 and Figure 10 gives illustration of a start-up screen following the switching on of the device.

Figure 9. Typical start-up process following switch-on (GPS-3 card with GPS-OD head)

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Figure 10. Typical start-up process following switch-on (GPS-4 card with GPS-HD head)

3.2.4.4 Application

Before establishing the connection with the GPS-3/4 card, choose the communications port intended to be used from the Preferences menu item under the Commands pull-down menu. No other communications setting by the user is necessary. The default port setting is COM1.

There is no real time clock operating on the GPS-3/4 card. The time recordings into the individual records are only possible, if the GPS-OD/HD is connected and one or two satellites have been already received.

The monitoring function can be activated by clicking the Monitor menu item of the Commands pull-down menu or the „MONITOR” button. The monitoring function remains active until we stop it by clicking the „STOP” button. As long as the monitoring function is active, no other function can be used.

When the monitoring function is started, the entries in the first line of the Log area refer to the actual status. The headline of the Log area helps us in the interpreting of the individual entries. In the course of monitoring each event generates a time-stamped line in the Log area of the display. Always the latest event is logged in the uppermost line. The time stamp is the UTC time provided by the GPS receiver. If no valid time data is available, you will see a „???” symbol in the relevant time stamp position.

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3.2.4.5 Monitoring At the exit from the monitoring mode the Log area of the display can be cleared by clicking the Clear log menu item of the File pull-down menu or the „CLEAR” button. The data stored in the GPS-3 card cannot be deleted or erased by the user.

The data contents of the Log screen can be saved as a text (txt) file, by clicking the Save log menu item of the File pull-down menu or the „SAVE” button.

The monitoring can be carried out with any duration of time. In monitoring mode the records are recorded – if there is any recordable information – in every second. Sequent events occurring within the same second will have the same time stamp. Since it is not absolutely necessary to display all the records in huge quantity at the same time, we recommend to save the log records as required and then clear the Log area according to the procedure described above. First click the Save log item of the File pull-down menu or the „SAVE” button. Then clear the screen by clicking either the Clear log menu item of the File pull-down menu or the „CLEAR” button.

3.2.4.6 Displaying of the log records stored on the GPS-3/4 card

There can be altogether maximum 1022 records stored in the non-volatile memory of the GPS-3/4 card in connection with the operation of the GPS-OD/HD and the GPS-3/4 card. In the memory there are always the latest 1022 records stored and the previous records are automatically deleted or erased (FIFO principle). Similarly to the monitoring function, each and every change in the status generates a new entry. The individual entries or records have a 1-second time stamp. Changes in the status occurring within the same second, will be recorded in one common log. A time stamp is generated only in case if the GPS receiver provides a valid date and timing data. The time stamp is the UTC time provided by the GPS receiver. If no valid time data is available, you will see a „???” symbol in the position of the time stamp.

The log records from the GPS card can be invoked to the Log area on the screen by clicking either the Upload Log menu item of the Commands pull-down menu or the „UPLOAD LOG” button.

When a log is being read out from the GPS card, a communication window pops up on the screen. In case of successful communication the window closed automatically after readout log records. Figure 11. shows the typical log screen. You are informed on communication failures, too. Most often the failure is due to that that the computer is not connected to the GPS card, or you have chosen not the right COM port for the connection.

The data contents of the Log area can be saved in a txt. file format, by clicking either on the Save log menu item from the File pull-down menu, or on the „SAVE” button.

The log information stored on the GPS card cannot be deleted, or erased by the user; if the log memory becomes full, the oldest entry, above line 1022, is deleted.

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Figure 11. Uploaded Log from the GPS-3 card

3.2.4.7 Displaying of identifiers

The identification entry (ID) of the GPS card can be displayed in the following ways:

a) By clicking the Upload ID menu item in the Commands pull-down menu, or the „ID” button.

b) By starting the Monitoring function: clicking the Monitor menu item of the Commands pull-down menu or the „MONITOR” button.

The identifier cannot be deleted or modified by the user.

3.2.4.8 Using the Reset button The GPS card has been designed and tested with the possible utmost care. Nevertheless, due to coincidence of unexpected circumstances or events (e.g. external disturbance) it may happen that it shows malfunctioning status and the operation of the card becomes unstable. Lack of communications between the PC and the GPS card, in spite of the proper port setting and cable connection, can be a sign of malfunctioning. In such cases, via the small hole that can be found on the surface of the card and using an appropriate tool (e.g. the top of a ball pen) you can bring the card into basic operating status by pushing the Reset button.

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If you experienced an operating status in which you have had to use the Reset button, please contact thereafter the manufacturer and describe precisely the operating circumstances and attach to your information letter the copy of the log file recording the operating circumstances. Doing so, you will greatly help the developer’s work for the elimination of the fault.

3.2.4.9 Exit from the program

In order to exit from the SW-GPS program you have to click on the Exit menu item of the Commands pull-down menu, or on the „EXIT” button. When you are working with the Monitoring function, you cannot exit from the program, unless you stop the monitoring.

3.2.4.10 The content of the Log text file The text files (txt. files) generated in the Monitoring mode of operation, or at the saving of the log records read out from the GPS card, can be easily displayed and interpreted (Figure 12). The data file uses the same symbols, also as to the sequence of the displaying, as what we can see on the Log screen. In case of certain displaying software programs it is recommended to disable the automatic line break function.

Figure 12. Format of a Log file

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3.3 PW 1006 input unit (INP-2)

INP-2 unit is one of the upgrade element of PW 1006 U It is intended for use when more than one 2.048 MHz output or 2,048 Mbit/s timing output needed, and we have to add to the subrack output cards for clock or timing distribution.

3.3.1 Description

INP-2

75oh

m75

ohm

PW 1006 input unit front panel

Line receiver

2.048 Mbit/ssinchronising

input

2,048 MHzsynchronising

input

1/n

1/n

1/n

1/n

f

f

Internalreference

Internalreference

Reset

Reset

Input alarm

Input alarm

Phase detector output to CPU

Phase detector output to CPU

Input clock for emergency operation

Input clock for emergency operation

Nosignal

Nosignal

AIS

LIU

PW 1006 input unit - block diagram

Figure 13. PW 1006 input unit

PW 1006 input unit receives the incoming 2.048 MHz or 2.048 Mbit/s timing signals. Both input channels have own phase measuring circuit. Different priority level can be ordered for each input channel. In this way one PW 1006 input card has two independent inputs. Four input cards are needed for using all eight input channels. If there is no need to use all inputs the parallel cards can be used for automatic protection. Input circuits continuously check the availability of 2.048 MHz, 2.048 Mbit/s incoming signal and AIS. Front panel and block diagram of PW 1006 input unit can be seen on

Figure 13.

3.3.2 Front panel signals Above each input connectors a multicolour LED can be found. The LED indicates the status of incoming signals as follows.

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2.048 MHz input Red: Lost or low level input signal

Green: Normal level input signal

2.048 Mbit/s input Red: Lost or low level input signal

Yellow: Incoming AIS

Green: Error free input signal

Applying 2 MHz signal to 2 Mbit/s input an AIS indication will prevent the malfunction, but the application of 2 Mbit/s signal at 2 MHz input causes error operation without lamp indication. Always check the connected input signal form!

3.3.3 Technical parameters

Timing input #1: 2.048 MHz, ITU-T G.703 (13), 75 ohm or high impedance

Frequency range: ±1,5x10-7

Timing input #2: 2.048 Mbit/s, ITU-T G.703 (9), 75 ohm or high impedance; Framed or unframed

Bit rate range: ±0.1ppm

AIS signal detection: Less then 3 zeros out of 2048 bit period

Wander tolerance for timing signal: max. 64 UIpp (31232 nspp)

Jitter tolerance for timing signal: according to ITU-T Rec. G.823 and ETSI EN 300 462-4

Input connectors: 1.6/5.6 type coaxial female

Input impedance: 75 ohm or high impedance, selectable

3.3.4 Jumper set-up Jumper set up depends on Card position as follows (Table 6).

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Card position at INP area JP 4-1 JP 4-2

1 open open

2 closed open

3 open closed

4 closed closed

Table 6. Jumper settings of INP-2 card

In case of card swapping or expansion the above jumper set up must be followed.

3.4 Clock signal distribution cards (OUT-n)

3.4.1 Description

Clock signal distribution card contains all output adapter and driver circuits that are needed for accessing the internal reference source signal. Types of output connectors are 9-pole D-sub on OUT-1 and OUT-2 but 1/2.3 coax connectors on OUT-3 and OUT-4 type cards.

Three 9-pole D-sub connectors can be found on OUT-1 and OUT-2 card. Two independent timing signals can be accessed on one connector, so there are six outputs on one OUT-1, OUT-2 type cards. 75-ohm asymmetrical and 120 ohm symmetrical connections are available. Eight output connectors can be found on OUT-3 and OUT-4 cards. Each coax outputs are 75 ohm unbalanced.

In case of normal PW 1006 operation the source of output timing signal is the internal reference. The internal reference source drives the four clock signal distribution cards via four independent channels providing uninterrupted operation in case of failure of any card. In case of internal reference failure the source of output timing signals is the highest priority available incoming signal. The hardware priority switch is a part of clock signal distribution card. Each output has an output signal monitoring circuit. This circuit generates alarm signals when failure occurs. Front panels and block diagrams of OUT-1, OUT-2 and OUT-3clock signal distribution cards can be seen on Figure 14 and Figure 15.

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Ala

rmin

dica

tor

2,04

8M

Hz

outp

uts

Clockoutputs

OUT-1

OUT-1, OUT-2

Front panel

Line driver

Line driver

Line driver

Line driver

Line driver

Line driver


output


output


output


output


output


output

Internal referenceand input clocks

Outputalarm

Priorityswitch

OUT-1, OUT-2 block diagram

Figure 14. OUT-1 and OUT-2 cards

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Clockoutputs

OUT-3

Alar

min

dica

tor

OUT-3

Front panel

Internal referenceand input clocks

Output alarm

Linedriver

Linedriver

Linedriver

Linedriver

Linedriver

Linedriver

Linedriver

Linedriver

2,048 Mhzsynchronising

output


output


output


output


output


output


output


output

Priorityswitch

OUT-3 block diagram

Figure 15. OUT-3 card

3.4.2 Front panel signals

Multicolor LEDs are placed on OUT-1, OUT-2 and OUT-3 cards for indicating alarm signals. LED indicates operation mode, reduced operational status or missing output signals as follows:

Red: At least one output signal misses Yellow: Clock distributor operation (INP signal serves directly as output signal) Green: SSU operation (when PW 1006 upgraded to PW 1008)

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3.4.3 Technical parameters

PW 1006 mode parameters OUT-1, OUT-2 Timing signal outputs: 2.048 MHz, G.703 (13), 75 or 120 ohm

OUT-3 Timing signal outputs: 2.048 MHz, G.703 (13), 75 ohm

Output jitter in PW 1006 operation status: max. 0.01 UIpp

Output MTIE in synchronized mode: according to ETSI EN 300 462 standard SSU or PRC limit depending on the operation

Output TDEV in synchronized mode: according to ETSI EN 300 462 standard SSU or PRC limit depending on the operation

OUT-1 output connectors: 9-pole D-sub, female

OUT-3 output connectors: 1/2.3 type coaxial female

3.4.4 Connectors

120 ohm symmetrical shielded pair or 75 ohm asymmetrical cables are needed for connecting timing signal. Pins of output connectors on OUT-1, OUT-2 card can be seen in the Table 7.

Pins Title Remarks

1 GND Ground and shield

2 2-a (0) „a” wire of 2nd output


4 1-a (0) „a” wire of 1st output


6 2-b (120) „b” wire of 2nd output 120 ohm

7 2-b (75) „b” wire of 2nd output 75 ohm

8 1-b (75) „b” wire of 1st output 75 ohm

9 1-b (120) „b” wire of 1st output 120 ohm

Table 7. Pins of output connectors on OUT-1, OUT-2 card

The output connectors on OUT-1, OUT-2 cards can be 75 or 120 ohm. The output pairs on the same connector can be configured as follows. Both outputs are the same (120 or 75 ohm). Outputs are different (one 120 ohm and one 75 ohm). Output connectors of OUT-3 card are 75 ohm coaxial.

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9

2 27

4 4

8

5 5

6

1 1

9 p. male in the cable 9 p.male in the cable

Synchronisingsignal 1

Synchronising signal 1



a a

a

b b

b

a

b

120 ohm balancedoutput for

shielded pairs

75 ohm unbalanced output for

coaxial cables

Figure 16. Wiring of OUT-1 and OUT-2 output connectors

3.4.5 Jumper set-up

Jumper set-up depends on card position as follows:

Position of clock signal distribution

card

Input Alarms Internal reference bus

1 J4-J5-1, J5-J6-5, J1-J2-2, J2-J3-6 J9-J10-1

2 J4-J5-1, J5-J6-5, J1-J2-2, J2-J3-6 J9-J10-1

3 J4-J5-1, J5-J6-5, J1-J2-2, J2-J3-6 J9-J10-3

4 J4-J5-1, J5-J6-5, J1-J2-2, J2-J3-6 J9-J10-4

Table 8. Jumper settings of OUT cards

In case of card swapping the above set-up must be used. Card positions increase from left to right starting at the position of clock signal distribution card.

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3.5 Synchronizing signal distribution card (OUT-4) The combined OUT-4 synchronous signal distribution card provides 2.048 Mbit/s framed or unframed signal stream, or 2.048 MHz clock output signal. The outputs in case of the OUT-4 card appear on coaxial female jacks of type 1/2.3.

There can be eight coaxial output connectors found on an OUT-4 unit, arranged in two groups each of four jacks. Each coaxial output is of 75 Ohm and the returning branch of each is grounded. The switch-over from the signal stream to the clock signal form of a given group of four jacks is possible with switches on the front panel. With the two switches belonging to a given group of four jacks there can be the following variations set.

1. The lower switch belonging to the four-output group is in “CLK” position At the four outputs belonging to the switch a synchronizing square signal of 2.048 MHz frequency appears having the parameters according to ITU-T G.703 (13) specifications. If this switch is in “CLK” position, the position of the other switch belonging to this four-output group is indifferent, its switch-over has no effect.

2. The lower switch belonging to the four-output group is in “HDB-3” position

At the four outputs belonging to the switch a synchronizing signal stream appears of 2.048 Mbit/s bit rate, having physical parameters according to ITU-T G.703 (9) specifications, with framing according to ITU-T G.704, or with pseudo random bit sequence. If this switch is in “HDB-3” position, we can select the type of the signal stream with the other switch belonging to this four-output group.

3. The lower switch belonging to the four-output group is in “HDB-3” position, while the upper switch is in “PRBS” position

At the four outputs belonging to the switch a synchronizing signal stream of 2.048 Mbit/s bit rate appears with 215-1 pseudo random bit sequence (PRBS), in accordance with ITU-T Rec. O.162.

4. The lower switch belonging to the four-output group is in “HDB-3” position, while the upper switch is in “FRM” position.

At the four outputs belonging to the switch a synchronizing signal stream of 2.048 Mbit/s bit rate appears with framing according to ITU-T Rec. G.704. Within the normal frame the content of the voice/data signal time slots are AIS, the indicating bits are in default status and there is no CRC. The sending of PDH SSM information is possible on a selected Sa bit. Depending on the status of the PW 1006 alarm and the environment the SSM information is changing automatically, according to a pre-set order, but the SSM content can be even switched off.

The timing source of the synchronous signal outputs is the internal reference in case of normal PW 1006 operation. The internal reference is feeding the clock signal distributor/synchronous signal cards via four independent branches, in order to ensure that the timing signals of the

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normally working cards are preserved in case of a card failure. In case of the failure of the internal reference (emergency mode of operation) the timing source of the synchronizing output signal is the synchronizing signal of the “good” output selected according to the hardware priority. The hardware priority switch is also part of the synchronous signal distribution card. In addition, a circuit monitoring the output signal belongs to each output, too, which in case of a failure generates an output alarm and sends a visual warning signal as well.

The front panel and the block diagram of the PW 1006/8 OUT-4 synchronous distribution card is illustrated in Figure 17.

Timingoutputs

OUT-4

Out

pute

rror

lam

p

2Mbi

t/sor

2MH

zse

lect

orsw

itch

2Mbi

t/sor

2MH

zse

lect

orsw

itch

2Mbi

t/sco

ntan

tse

lect

or2M

bit/s

cont

ant

sele

ctor

OUT-4

front panel

Line driver

Line driver

Line driver

Line driver

Line driver

Line driver

Line driver

Line driver

CLKFRM

FRM

PRBS

PRBS

CLK

HDB-3

HDB-3HDB-3coder

SSMgenerator Alarms from

SSU subrack

HDB-3coder

Framegenerator

PRBSgenerator

Out 1

Out 2

Out 3

Out 4

Out 5

Out 6

Out 7

Out 8

Internal referenceReference alarmClock from input 1Alarm input 1Clock from input 2Alarm input 2Clock from input 3Alarm input 3Clock from input 4Alarm input 4

Output alarm

Priorityswitch

Block diagram of the OUT-4 synchronizing signal distribution card

Figure 17. Block diagram and front panel view of the OUT-4 synchronizing signal distribution card

3.5.1 Front panel signals

On the OUT-4 card there is an indicator lamp (LED) that indicates the card alarms with different colours. The green LED indicates the PW 1008 upgraded full service SSU operation, the yellow LED the clock signal distribution or emergency mode, while the red LED indicates the lack of the output signal, as follows.

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Red: There is no output signal at least at one output port

Yellow: There is a signal at each output, the device is operating in clock signal distribution or emergency mode (the selected timing source is the signal of one of the PW 1006 inputs)

Green: Normal PW 1008 regenerated SSU output signal exists at every output port

3.5.2 Technical data

Data of the PW 1006 mode operation OUT-4 Synchronous signal outputs: (can be switched over)

2.048 MHz, G.703 (13), 75 ohm 2.048 Mbit/s, G.703 (9), 75 ohm

2 Mbit/s content: PRBS 215-1 according to ITU-T Rec. O.162 or Framed, according to ITU-T Rec. G.704

Output jitter at PW 1006 operation: max. 0.05 UIpp

Output MTIE in synchronized mode: according to ETSI EN 300 462 standard SSU or PRC limit depending on the operation

Output TDEV in synchronized mode: according to ETSI EN 300 462 standard SSU or PRC limit depending on the operation

Output MTIE in synchronized mode: max. acc. to EN 300 462-4 PW 1006 limit curve

Output signal in TDEV synchronized mode:

max. acc. to EN 300 462-4 PW 1006 limit curve

Output connectors: 1/2.3 type coax female

3.5.3 Connectors The OUT-4 card has 75 ohm coaxial outputs and the returning branch of the connectors is grounded.

3.5.4 Jumper settings Certain card jumper settings vary according to the card position, as illustrated in the following tables. In case of card replacement or card extension, the settings given in the tables shall apply. The card numbering is to be understood from the left to the right at the place of the synchronous signal distribution card slots.

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3.5.4.1 Selection of the Emergency mode alarm and using of the 2 MHz bus

Synchronous signal card

position

Input alarm Internal reference

bus

1

J1B

J2B

J2 J1A

J2A

J1

J4AJ4

321 4

2J1

B

J2B

J2 J1A

J2A

J1

J4AJ4

321 4

3

J1B

J2B

J2 J1A

J2A

J1

J4AJ4

321 4

4

J1B

J2B

J2 J1A

J2A

J1

J4AJ4

321 4

Table 9. Selection of the Emergency mode

3.5.4.2 Selection of the PW 1006 synchronization input influencing the SSM value

Number of PW 1006 synchronization input

1 2 3 4 5 6 7 8

Input alarm

J7-J7A jumper positions

J7

J7A J7

J7A J7

J7A J7

J7A J7

J7A J7

J7A J7

J7A J7

J7A

Table 10. Selection of the PW 1006 synchronization input

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When more than one input is selected at the same time an OR relation is implemented, that is any selected input gets into alarm status and the SSM value changes.

3.5.4.3 Selection of the Sa bit for the forwarding of the SSM content

Number of Sa bits

J8A-J8 jumper positions

4 J5AJ5

321 4 5

5 J5AJ5

321 4 5

6 J5AJ5

321 4 5

7 J5AJ5

321 4 5

8 J5AJ5

321 4 5

No SSM bit in use

J5AJ5

321 4 5

Table 11. Selection of the Sa bit

3.5.4.4 Information for the modification of the SSM content

Quality of internal

reference

J5-J5A Jumper positions

Rubidium J5AJ5

3 2 1

OCXO1 J5AJ5

3 2 1

OCXO2 J5AJ5

3 2 1

Table 12. Information for the modification of the SSM content

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Transmission technical

elements of the synchronization

chain

J5-J5A Jumper positions

SDH J5AJ5

3 2 1

PDH J5AJ5

3 2 1

Table 13. Settings of transmission technical elements of the synchronization chain

3.6 PW 1006 / PW 1008 alarm card (ALR-3)

3.6.1 Introduction

The ALR-3 type PW 1006 / PW1008 alarm card serves as an interface for the connection of the internal alarms of PW 1006 towards an external alarm collecting system. The individually programmed micro controller of the unit can be reached from the front panel via a V.24/V.28 (RS-232) port. Through this port the operation of the card can be configured and the actual alarms, the actual operating status of the PW 1006 retrieved. The generating and eliminating alarms, the changes in the status of the operation are stored in the non-volatile memory of the card. There can be maximum 1022 records stored. From the non-volatile memory the log recording the events is readable via the serial port. Each record has a one-sec time stamp. The memory is working on the basis of FIFO principle; i.e. always the latest 1022 records can be retrieved. Older records, following line 1022 are automatically erased.

In terms of its physical parameters the applied V.24/V.28 port is a fully standardized port, but the protocol operating it, is a special one, so thus the handling of the card is possible only with the PC-based (PW 1006-ALR) software provided with the equipment. The remote powering of the card is independent from the power supply system of the equipment; it is directly connected via the FLT-1 card to the power supply network of –48V nominal voltage.

The operation of the ALR-3 card is fully independent from other circuits of the PW 1006 equipment. It means that it does not affect the operation of the PW 1006 equipment, the eventual malfunctioning or failure of it does not disturb the operation of the PW 1006 equipment. The operation of the PW 1006 cannot be influenced by the configuration of the ALR-3 card; it does not react upon it.

The front panel of the unit and the block diagram of the card can be seen on Figure 18.

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ALR-3

Ala

rmco

ntac

tsPC

Alarms

Alarm card front panel

Equi

pmen

tint

erna

lal

arm

s

Ala

rmco

ntac

ts

V.24

Microcontroller

Memory

Relays

Urgent(internal)

Not urgent(external)

Block diagram of the alarm card

Figure 18. Block diagram and front panel scheme of the ALR-3 alarm card

3.6.2 Front panel indicators

On the card, above the alarm output contacts there can be two indicator lamps (LED) found. The LED-s show the collected alarms as follows:

Red LED is on: Urgent alarm Yellow LED is on: Not-urgent alarm

The level of the individual alarms can be set at the configuration of the unit and – if required – it can be modified at any time.

Depending on the set configuration the ALR-3 card is suitable for the indication and logging of the following alarms:

− GPS alarm, − Rubidium alarm, − Output alarm, − CPU alarm, − Internal power voltage error, − Input alarm, − Lack of input supply voltage (-48 V) 1, − Lack of input supply voltage (-48 V) 2, − Alarm due to the quality of input signal originating from CPU software.

3.6.3 Connection of the alarm connector On the front panel there can be found a standardized 25-pin D-sub connector for the alarm output contacts. The Figure 19 shows the pin assignment of the connector.

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1

13

14

25

Power input 1Power input 2InputInput qualityNot urgent (ext) collectedUrgent (int) collectedOutputInternal poweringGNDCPU RubidiumGPS+5V out

Figure 19. Connection of the alarm connector

Each alarm output, independently from the grounding and any other output, is capable to close outer circuit loop. If in active status the unit processing the alarms requires grounding from the source equipment, then at the alarm cabling it is sufficient to establish one returning grounding towards the receiving unit with the interconnecting of connection pins from 14 to 25.

The GND (Pin 23) terminated at the connector and the +5V (Pin 13) supply voltage can be freely used. This – among others – makes it possible to apply a small LED-indicator (shippable supplementary unit) that can be directly plugged into the connector. The current of the terminated +5V supply voltage is limited by a serial 51 ohm resistance. If in active status the unit processing the alarms requires +5V from the source equipment, the +5V alarm signals for the receiving equipment can be provided via interconnecting of the connection pins from 14 to 25, except pin 23, and connecting them to pin 13.

3.6.4 Technical data

Data of alarm outputs Alarm contacts: Isolated contacts, closed in alarm status

Connector: 25- pin D-sub (male)

Maximum voltage: 60 V

Maximum switchable current: 100 mA

Residual voltage: Max. 3.5V (at 100 mA)

Serial port:

Connector: Mode of transmission: Data bit rate: Number of data bits: Stop bit: Flow control: Parity checking:

V.24/V.28 (RS-232)

9-pin D-sub (female) Asynchronous 115.2 kbit/s 8 1 No No

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The connection and pin assignment of the serial port connector can be seen in the Table 14.


1

2 RX Output

3 TX Input

4 DTR-RI Out of use

5 GND Signal ground

6

7 RTS-CTS Out of use

8 RTS-CTS Out of use

9 DTR-RI Out of use

Housing Shielding

Table 14. Pin assignment of the serial port connector

A “straight” cable is needed to connect the PC and it is sufficient to use the data sending, data receiving wires and the signal ground.

3.6.5 Jumper settings

There are no user jumpers on the ALR-3 card. The setting of the given operating statuses is possible via the serial port on the front panel with the help of the software provided with the equipment.

3.6.6 Using the SW-ALR software

The SW-ALR software is interworking exclusively with the ALR-3 type card of PW 1006 equipment of series PW 1006/1008 manufactured by PolyNet. The software is suitable for the configuration of the ALR-3 card, for the indication of the alarms of the PW 1006 equipment via the ALR-3 card, for the displaying of the log stored in the equipment and for the exporting of the log for further processing. Its application to a great extent facilitates the safety operation of the PW 1006 equipment and the detection of the causes of the eventually occurring error phenomena.

3.6.6.1 Operating system and hardware environment The SW-ALR software is running under MS Win95, Win98, WinME, WinNT, Win2000 and WinXP operating systems, however use of Win2000 or WinXP Professional operating system

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is recommended. The program does not need to be installed, only the ALR_Vxx.exe file needs to be run from any optional HDD directory. The program has an English user interface.

A Pentium 4 category personal computer, having a serial port (COM-1 or COM-2) connection possibility, is recommended. For the display settings minimum 800 x 600 pixels resolution and at least using of 256 colors are recommended.

3.6.6.2 The user interface of the program Having started the program, it offers a well arranged user interface that is shown in the following Figure. Basically, the screen can be divided into three main parts:

− On the upper part the menu bar can be found and the buttons below it serve basically for the operation of the program;

− The area occupying the bigger, lower part of the screen serves for the real time displaying of the operational statuses and alarms retrievable from the PW 1006 device via the ALR-3 card and for the displaying of the log data stored on the ALR-3 card;

− Between the above mentioned two sections of the screen there is the part serving for the displaying of the configuration settings (Settings).

The size of the screen can be modified with the generally used Windows methods. Horizontally what we see is not in full-size, because a full-size displaying of the data is not necessary.

Menus and Buttons

Settings area

Log area

Figure 20. PW 1006-ALR screen

The individual functions can be reached from the pop-up menus, but direct buttons help accessing to the most important functions, too. It is reasonable to use a pointing tool, for e.g., a mouse for program handling. Pulling the mouse cursor over the individual buttons, a small pop-up window (hint) informs us about the function of the given button.

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3.6.6.3 Settings The connection to the PW 1006 ALR-3 card is not a pre-condition of starting of the program. The program communicates with the ALR-3 card only during the uploading and downloading of the data. However, there is one exception, namely when we are using the monitoring function.

Before establishing the contact with the ALR-3 card, choose the communications port intended to be used from the Preferences menu item under the Commands pop-up menu. To perform other user settings in connection with the communications is not necessary. The default port setting is COM1.

For the configuration settings of the ALR-3 card we use the Settings panel of the display.

Under the CPU Activity(s) we can set the control parameters of the CPU card’s operation belonging to the individual inputs. The CPU card sends an impulse towards the ALR-3 card when a tuning cycle is finished. The time-out generates a CPU alarm. The maximum time interval between the individual inputs can be set between 100 and 150,000 sec. The default value is 1,500 seconds. Using the buttons of the combo box we can advance in 100-sec. steps, but manually any optional value can be entered. Clicking the check box below the combo box the CPU Activity(s) function can be disabled. For the unused inputs the setting of the CPU Activity(s) function is precluded right from the beginning.

In the lowest line of the Settings area of the display the alarms handled by the ALR-3 card can be individually disabled. For doing so we have to mark with an ‘x’ the appropriate check box. The Table below gives an explanation on the meaning of the alarm functions that can be disabled.

Name of the alarm Reason why the alarm has occurred

INPUT 1...8 The alarm occurs in case of lack of signals (LOS) of the input cards and also when an AIS signal arrives in onto the 2 Mbit/s input.

INPUT QUALITY 1...8 The alarm occurs if the frequency difference measured in a given integration cycle of a 2 MHz or 2 Mbit/s signal arriving in onto an input card in comparison to the inner reference value exceeds the 9,9x10-7...-1x10-10 value configurable on the CPU card.

CPU A CPU alarm is generated if the CPU card is removed. An alarms occurs also in the case, if the impulses indicating the individual tuning cycles do not arrive in from the CPU card within the time frame set in the CPU Activity(s) field of the Setting panel.

Table 15. Typical reasons of alarms

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RB A rubidium alarm occurs due to the faulty operation or missing of the internal rubidium oscillator. A few minutes alarm occurs also after the switching on the oscillator or the PW 1006 equipment, during the time of warming up and stabilizing the rubidium oscillator.

GPS A GPS alarm is generated when a trouble occurs in the operation of the GPS receiver of the PW 1006 equipment. After switching on, for approximately 5...20 minutes until the GPS receiver is starts up, the GPS receiver is in alarm status and does not send any output signal to the input card. So thus along with the GPS alarm there is an input alarm generated, too, on the given input (to which the 2 MHz signal originating from the GPS card is connected).

OP An OP (Output signal) alarm occurs when any port of any of the built-in output card goes wrong, or when any of the synchronizing outputs is cut short. An output alarm may occur also in the case, when there is a long, at the far-end unclosed cable is connected to a synchronizing output.

PWR A PWR alarm occurs when the value of any of the internal supply voltages of the PW 1006 equipment get out of the range required for the safety operation.

48/1 ; 48/2 These alarms occur in case of failure of the –48V nominal value supply network feeding the PW 1006 unit. An alarm occurs also in the case, when these voltages go down below the values required for the safety operation.

Table 15. Typical reasons of alarms (cont.)

The ‘urgent’ and ‘not urgent’ qualification of the alarms mentioned in the above table can be chosen in the Alarm Severity line.

Clicking the Default Settings menu item of the Commands pop-up menu or pushing the „DEFAULT” button the Settings panel is uploaded with the default values according to the Figure 20. The values given in the Settings panel can be downloaded into the PW 1006 equipment by clicking the Download all Settings menu item of the Commands pop-up menu or using the „DOWNLOAD ALL SETTINGS” button. The downloaded settings become active immediately on the ALR-3 card.

The settings of the ALR-3 card can be saved as a file. For doing so, click the Save Settings menu item of the File pop-up menu, or the „SAVE SETTINGS” button. The saved file will be a text-type file with ast extension. Of course, it is also possible to read this saved file, by clicking the Open Settings menu item of the File pop-up menu or the „LOAD SETTINGS”

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button. From the file the settings are forwarded to the Settings panel. The values from the Settings panel can be downloaded onto the ALR-3 card of the PW 1006 equipment by clicking the Download all Settings menu item or using the „DOWNLOAD ALL SETTINGS” button. The downloaded settings become immediately active on the ALR-3 card. Though the text file with ast extension, containing the configuration settings can be modified using a text editor program, but we do not recommend doing so. The reason is that the non-observation of the very strict syntactic it has can cause malfunctioning of the ALR-3 card.

The Download PC time menu item of the Commands pop-up menu, or the „DOWNLOAD PC TIME” button serves for the setting of the diary and the clock operating on the ALR-3 card. Clicking the menu item or the button the date and time settings of the configuring PC will be downloaded onto the ALR-3 card. The clock time and date settings are preserved on the ALR-3 card, even if it is removed from the equipment and if it has no voltage. The Lithium battery on the card ensures the trouble free operation of the real time clock of the card, even if the equipment is switched off or also when the card is pulled out from it.

3.6.6.4 Monitoring

The built-in ALR-3 card of the PW 1006 device makes it possible to continuously monitor the status of the equipment. To start the monitoring function it is necessary to connect the PC, on which the PW 1006-ALR software is running, to the ALR-3 card via the serial port.

It is important to select the proper serial (COMn) port. The parameters of the port need not to be set, the setting takes automatically place.

The monitoring function can be activated by clicking the Monitor menu item of the Commands pop-up menu or the „MONITOR” button. The monitoring function remains active until it is stopped by clicking the „STOP” button. As long as the monitoring function is active, no other function can be used.

When the monitoring function is being started, there will be entries according to the given settings entered into the upper line of the log interface. The headline of the Log interface makes it possible to interpret the individual entries. The “-“ entry means that according to the given setting the given alarm is disabled.

In the followings during the monitoring each and every event, developing or eliminating alarm will generate a new line having a time-stamp on the Log surface of the display. Always the latest event is logged in the upper line. In positions where an alarm exists, there are “1”-s entered according to the severity settings, highlighted with red (urgent alarm) or with yellow (non-urgent alarm) background. The INPUT and the INPUT QUALITY alarms appear in collected form as well, in the INP and in the INQ columns. For all the alarms the entries for the urgent and non-urgent alarms appear in column “U” and column “NU”, respectively.

The NEW” „CLR” and „REM” columns are inactive in monitoring mode, so thus they do not display any information.

At the exit from the monitoring mode, the Log screen can be cleared by clicking the Clear log button of the File pop-up menu, or the „CLEAR” button.

The data contents of the Log screen can be saved as a text (txt) file, by clicking the Save alarms menu item of the File pop-up menu, or clicking the „SAVE” button.

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The Monitoring can be carried out with any duration of time. The displaying of the alarm records or the updating of the screen contents can be quite time-consuming in case of a huge number of records. Up to the first 100 records the monitoring takes place by 100 ms. Displaying every record afterwards, the monitoring time is extended by ~1 ms time duration per record. Therefore, we do not suggest displaying all the records in large quantity at the same time on the screen. Rather, as required save the log records according to the procedure described above. Then clear the Log, as follows: first click the Save log item of the File pop-up menu, or the „SAVE” button and then clear the screen by clicking either the Clear log menu item of the File pop-up menu or the „CLEAR” button.

Figure 21. Screen of Monitoring mode of operation

In the monitoring mode of operation, none of the parameter settings can be changed. On the screen you will see the settings uploaded at the time of the beginning of the monitoring until you exit from the monitoring mode of operation.

3.6.6.5 Displaying of the log records stored on the ALR-3 card There can be altogether maximum 1022 records stored in the non-volatile memory of the ALR-3 card in connection with the operation of the PW 1006 equipment. In the memory there are always the latest 1022 records stored and the previous records are automatically deleted or erased (FIFO principle). Similarly to the monitoring function, each and every new alarm or elimination of the alarm generates a new entry. The individual entries or records have a 1-second time stamp. Alarms generating or eliminating within the same second will have the same time stamp. The alarms with the same time stamp will appear in the log file in the sequence of their generation or elimination.

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The log records from the ALR-3 card can be uploaded to the Log screen by clicking either the Upload Log menu item of the Commands pop-up menu or the „UPLOAD LOG” button. Before doing so it is important to choose the right serial (COMn) port. The parameters of the port need not to be set, because their setting takes place automatically.

On the Log screen of the display in positions where an alarm exists, there are ‘1’-s displayed according to the current severity settings, highlighted either with red (urgent alarms) or with yellow (non-urgent alarms) background. The INPUT and the INPUT QUALITY alarms appear in collected form as well, in the INP and in the INQ columns. For all the alarms the entries for the urgent and non-urgent alarms appear in column “U” and column “NU”, respectively.

The “1” entry in column „NEW” refers to a new line that has been generated by a new alarm. If the colour of the background is red, it indicates that the new alarm was an urgent one, while in case of a yellow coloured background the given line was generated by a not urgent alarm. In case if both types of the alarms have occurred at the same time, the colour of the “1” entry will be red in the “NEW” column. In the “CLR” column the “1” entry appears with a green background, if the given line was generated by an eliminated alarm. The meaning of the entries appearing with a blue background in the last “REM” column, can be found in Table 15.

P Switch-on of power supply

D Download setting parameters

T Time setting of the card to the PC clock

R Card reset

W ALR-3 internal operational failure

Table 16. The meaning of the entries in the Remarks column

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Figure 22. Displaying of Log on the screen

Reading out the log illustrated on Figure 22 we can state that the ALR-3 card was put on power at 20:34:49 (REM= P). At 20:44:28 a setting downloading took place (REM= D). From the REM= D line we can read out the „Alarm Severity” and „Alarm Disabled” settings. The line above it (CLR=1) refers to the starting of the logging after the download. In the given case there was no alarm in the PW 1006 equipment. According to line with 20:47:12 time-stamp there was a resetting of the ALR-3 card done (REM= R).

The log shown on Figure 23 is an example of log records produced due to different occurred or eliminated alarms. The data contents of the Log window can be saved in txt. file format, via clicking on the Save log menu item of the File pop-up menu or on the „SAVE” button. The log information stored on the ALR-3 card cannot be erased by the user. If the log memory becomes full, the oldest line, above line 1022 is erased.

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Figure 23. Example for the displaying of logged alarms

3.6.6.6 Displaying of identifiers

The identification (ID) entry of the ALR-3 card can be displayed in the following manners:

c) By clicking the Upload ID menu item in the Commands pop-up menu, or the “ID” button.

d) By starting the Monitoring function: click the Monitor menu item of the Commands pop-up menu or the „MONITOR” button.

The identifier cannot be deleted or modified by the user.

3.6.6.7 Messages on the screen during the communication with the ALR-3 card When the ALR-3 card is uploading settings or reading out data, a dialog window pops up on the screen displaying communication messages. In case of successful communication the window can be closed by clicking the „OK” button (Figure 24). You are informed in case of communication failure, too. The most frequently occurring failure is that the personal computer is not connected to the ALR-3 card or you have chosen not the right COM port for the connection.

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Figure 24. Communication messages

3.6.6.8 Using the Reset button

The ALR-3 card has been designed and tested with the possible utmost care. However, due to coincidence of unexpected events it may happen that it shows a malfunctioning status and the operation of the card becomes unstable. A REM= W entry in the REM column of the log read out may refer to malfunctioning. In such cases, via the small hole that can be found on the surface of the card and using an appropriate tool (e.g. the top of a ball pen) you can bring the card into basic operating status by pushing the Reset button.

The use of the Reset button has no effect at all on the operation of the PW 1006 equipment; it does not influence it in any way. The log information stored on the ALR-3 card is preserved even in this case, the resetting does not influence the settings of the clock of the card.

If you experienced an operating status in which you have had to use the Reset button, please contact thereafter the manufacturer and describe precisely the operating circumstances and attach to your information letter the copy of the log file recording the operating circumstances. Doing so, you will greatly help the developer’s work for the elimination of the fault.

3.6.6.9 Exit from the program

In order to exit from the PW 1006-ALR program you have to click the Exit menu item of the Commands pop-up menu, or the „EXIT” button. When you are working with the Monitoring function, you cannot exit from the program, unless you stop the monitoring.

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3.6.6.10 Contents of the log text file (txt) The text files (txt. files) generated in the Monitoring mode of operation, or at the saving of the log records read out from the ALR-3 card, can be easily displayed and interpreted. The data file uses the same symbols, also as to the sequence of the displaying, as what we can see on the Log screen. The txt file, of course, does not contain color information, the urgent alarm severity is indicated with a „!” symbol, so thus the data can be displayed with the help of any commonly used file displaying program. In case of certain displaying software programs it is recommended to disable the automatic line break function.

3.7 Power supply filtering card (FLT-1)

3.7.1 Description Supply voltage connectors and input filters put together in the Power Supply Filtering Card. Also, supply voltage input fuses are settled here. Front panel and block diagram can be seen in the following Figure.

FLT-1

-48

Vin

put1

.-4

8V

inpu

t2.

Front Panel

-48 V input 1

-48 V input 2

Input filter

Inputfilter

-48 V to power supply 1

-48 V to power supply 2

-48V 1

-48V 2

Overvoltage andreverse polarity

protection

Overvoltage andreverse polarity

protection

Power Supply Filtering Card

Block Diagram

Figure 25. Power supply filtering card

WARNING!

FUSES TYPE USED AT POWER INPUTS ARE G20 2A-T TYPE. THE FUSES CAN BE REPLACED WITH THE SAME TYPE ONLY.

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3.7.2 Front panel signals LEDs are placed above each power input connectors indicating the availability of supply voltage as follows:

-48 V input #1.

Dark: No power Green: Power available

-48 V input #2.

Dark: No power Green: Power available

3.7.3 Connectors Pins of Power input connector can be seen on Figure 26.

A1

A2

12

345

Battery +

Battery -

Ground for power cord shield

Figure 26. Pin assignment of the power port connector

Power cable is equipped with a 7-pole female connector.

Pins 1 and 2 are for grounding and shield respectively. Even Batt + nor Batt – have no any connection to subrack ground, the power inputs are floating.

WARNING!

THE SAFETY GROUND CONNECTION IS PROVIDED ON THE EQUIPMENT BACK PANEL. THIS POINT MUST BE CONNECTED TO THE COMMON GROUND CONNECTORS OF RACK PRIOR STARTING INSTALLATION OF GPS RECEIVER AND CONNECTING POWER CABLES.

3.7.4 Technical parameters Supply voltage parameters:

Supply voltage input #1: 40.5...60 Volts, max. 1.2 Amperes

Supply voltage input #2: 40.5...60 Volts, max. 1.2 Amperes

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3.7.5 Jumper set-up The available two power supply inputs can be common or independent. Common mode can be used when one power supply unit and two independent power source are available. Jumper set-up is the following (Table 17).

No. Of power supply units

Access to Power Supply

Jumper set-up

1 1 J1 1-2: Close J2 1-2: Close

1 2 J1 1-2: Close J2 1-2: Close

2 1 J1 1-2: Close J2 1-2: Close

2 2 J1 1-2:Open J2 1-2: Open

Table 17. FLT-1 jumper settings

3.8 Power supply (PWR-2 and PWR-3)

3.8.1 Description

The power supply blocks used in one subrack are similar to each other and they are replaceable. One power supply contains a DC-DC converter to 80 W (75 W at PWR-3) maximum power and three dissipative or switching output stabilizers. The 24 V output is controlled by the main DC – DC converter itself. Other outputs stabilized by individual additional stabilizers.

The front panel and the block diagram of the power supply can be seen on Figure 27.

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PWR-2

Power Supply -48V

+24V

+15V

-12V

+5V

Front panel of power supply

Input filter

Outputfilter

Outputfilter

Outputfilter

Outputfilter

48 V DC input

+24V out, 1,7A max

+ 5V out, 1A max

+ 15V out,1A max

- 12V out0,5A max

+5V stab.

+15V stab.

-12V stab.

DC-DCconverter

48 V in

+24 V out

+9 V out

+19 V out

+16 V out

Power supply block diagram

Figure 27. Power supply card

3.8.2 Front panel lamps On the front panel cooler there are placed four green lamps. The lamps are signing the presence of PWR-2 output voltages.

3.8.3 Technical parameters Input voltage range: 40.5...60

The input is floating

Power rating: PWR-2: 80W, PWR-3: 75W

Internal outputs: +24V max. 1.7 A +5V max. 1A +15V max. 1A -12V max. 0,5A

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4. Installation hints

4.1 GPS head cabling, lightning protection

SSU GPS-3 card"To GPS Head" connector

8+1p, M23

Cat 5 STP indoor cable

Cat 5 STP patch cable

9p. Dsub

9p. Dsub

9p. Dsub

Frame ground. Zone 2.

Building internal ground. Zone 1.

Building internal ground. Zone 1.

CAT-5 outdoor cablewith integral strech

element

First overvoltage protectionand equipotential grounding

where the cable enters to the building

Second overvoltage protectionand equipotential grounding

in the SSU contain frame

Wall entering

Surge voltage protectorVIL-1

Surge voltage protectorVIL-2

GPS-ODOutdoor head

Telecommunication frame

Lightning protection outdoor conductor

Strech element

Building

Protection method according to IEC 81 standard

To SSU ground screw

GPS-OD on roof rod

VIL-1 and VIL-2 surge voltage protectors

Figure 28. Lightning protection of GPS-OD or GPS-HD unit

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4.2 Typical GPS-OD and GPS-HD head installation modes

In the following Chapters there are some typical installation modes presented. It shall be ensured that the antennas have free sky view. The maximum allowable shadow for optimal operation is shown on Figure 29.

4.2.1 Installation to 2” or higher size fixing rods

250 mm size console

(Installation accessory)

2" diameter (60mm max.) steel tube

10-20 deg. 10-20 deg.

Proposed circular sky view angle for optimal operation

Allowable shadow for optimal operation

Allowable shadow for optimal operation

GPS-ODSize: 75 dia x 300 mm

Weight: 1000g


element

Hose clamp90 to 110 mm


"H" spacer(Installation accessory)

Figure 29. Typical GPS-OD installation; allowable shadow

4.2.2 GPS receiver fixing to 5/4” size rod If the antenna head is mounted not on the top of the rod, the console as described under item 4.2.1 should always be used in order to reduce the shadow effect of the rod.

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Fixing to 5/4" size antenna rod


Weight: 1000g


element


(Installation accessory) "H" spacer(Installation accessory)

Figure 30. Fixing to 5/4” size antenna rod

4.2.3 GPS receiver fixing to balcony or roof grid

Balcony / roofgrid


Weight: 1000g

250 mm size antenna console(Installation accessory)


element




60 mm max.

Figure 31. GPS-OD or GPS-HD installation fixed to balcony or roof grid

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4.2.4 GPS receiver installation to a horizontal element of microwave / GSM tower

At such installations it is not necessary to fix the antenna head to the top of the tower exposed to danger of direct lightning. It is enough to place the GPS head at such a height where the surrounding buildings and ground objects cause already less shadowing.

The grid tower causes only partial shadowing; the antenna “sees through” among the grids. At the same time, the possible biggest distance should be kept from the GSM and URH antennas in order to minimize the proximity interference effect.


Weight: 1000g

250 mm size antenna console(Installation accessory)


element




60 mm max.

Figure 32. GPS-OD installation mounted on antenna tower

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4.2.5 GPS receiver wall mount


Weight: 1000g

250 mm size antenna consolefor wall mount

M10x90 base screw

Grounding


element




Figure 33. Wall mounted GPS-OD installation

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4.3 Typical installation set for GPS-OD installation

Description Quantity

GPS-OD or GPS-HD GPS outdoor unit for PW 1006/1008synchronising equipment

1 piece.

VIL-1 surge voltage protector with 2,5m ground wire 1 piece.

VIL-2 surge voltage protector with 2,5m ground wire 1 piece.

Outdoor cable with or without* stretch element for GPS-OD/HD to VIL-1 interconnection. Pre assembled cable with connectors.

20 m typical, or the length is according to site survey.

Indoor cable for VIL-1 to VIL-2 interconnection. Pre assembled cable with connectors.

20 m typical, or the length is according to site survey.

Indoor patch cable for VIL-2 to PW 1006/1008 GPS card interconnection

Pre assembled cable with connectors.

2.5 m

Table 18. Typical installation set for GPS-OD/HD installation

250 mm antenna consol for rod fixing 1 piece

Hose clamp from 90 to 110 mm for GPS-OD fixing 2 pieces

“H” spacer 1 piece

Table 18. Typical installation set for GPS-OD/HD installation (Cont.)

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4.4 Cables for GPS head connection

4.4.1 GPS head outdoor cable

Strech element

Strech elementIt have to be fixed and grounded

to the tower elements

M23, 8+1pin female

M23, 8+1pin female

To GPS-OD head

Strech element

Cat5 pairs

Shielding

1

6

2

7

3

8

4

9

5

1

6

2

7

3

8

4

5

9

Brown

Brown-white

Green

Green-white

Blue

Blue-white

Orange

Orange-white

Shield

CAT-5 shielded outdoor cable

Figure 34. GPS-OD/HD to VIL-1 patch cable

*

The connection of the cable necessary for the cabling of the head is shown on Figure 34. The cable is a Cat-5 aerial cable, with a steel stretch element an UV resistant cover equipped, designed for outdoor application. The stretch element containing outdoor cable needs only the case as horizontal hanging needs. Using outdoor cable without stretch element the cable have to be fixed to the tower in one meter frequency.

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4.4.2 GPS head indoor cables The indoor cable is a shielded Cat5 cable equipped with 9-pin D-sub connectors between the VIL-1 and VIL 2 lightning protectors. There shall be a shielded Cat5 patch cable applied between the VIL-2 protector and the PW 1006 unit. One cable need between VIL-1 and VIL-2 lightning protectors and an other from the VIL-2 to PW 1006 unit.

1

6

2

7

3

8

4

9

5

1

6

2

7

3

8

4

9

5

Brown

Brown-white

Green

Green-white

Blue

Blue-white

Orange

Orange-white

Shield

CAT-5 shielded indoor cable

Figure 35. Indoor cables wiring

4.5 Typical cables for PW 1006 external connections

To OUT-1 or OUT-2output card

9 pin male

27

48

5

1

9 pin male



a

a

b

b

2YCVCVY 0,31/1,95 (75)

2YCVCVY 0,31/1,95 (75)

1/2,3 male

1/2,3 male

Figure 36. Output cable for OUT-1 and OUT-2 card with 1/2.3 plug

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To OUT-2 output card

9 p. D sub male

9 p. D sub male

4

2

1

95

6

2x0,5 MM2 balanced pair

2x0,5 MM2 balanced pair

Figure 37. Output cable for OUT-1 and OUT-2 card with 120 ohm balanced connection

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To OUT-2 output card

To ADR155C "SYNC" connector Equipment 1.

To ADR155C "SYNC" connectorEquipment 2.

9 p. D sub male 9 p. D sub male

9 p. D sub male

9 p. D sub male

9 p. D sub male

9 p. D sub male

4 3

3

8

8

2

1

9

5

6

2x0,5 mm balanced pair

2x0,5 mm balanced pair

Figure 38. Output cable for OUT-1 and OUT-2 card with 120 ohm balanced connection to ADR 155C to 1500 equipment

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ESI 1 (75)

14p. Female

14p. Female

2YCVCVY 0,31/1,95 (75)

7

6

UMUX 1500COBUX lowest section

Figure 39. Output cable for OUT-3 and OUT-4 card or for direct GPS card output connection for UMUX (FUX-U) equipment COBUX card

7 p. female

SSU power input on FLT-1 card

7 p. female

ToTop rack unit or

Power distribution frame-48 connection

3x1 MTK

A1

A2

Battery return

GND

Blue

Yellow/green

Braun

A1

A2

12

345

Battery return (+)

Battery (-)

Ground

1

2

Battery -48V

Figure 40. Power cable

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75

25 p. female

12x0,14+shield

25 p. female

SSUalarm outputs

Power input 1Power input 2InputInput qualityExternal common (Not urgent)Internal common (Urgent)OutputInternal poweringNCCPURubidiumGPS

123456789

10111213

141516171819202122232425

Shield Shield

Common return Black

Light greenGreenPinkLight grayOrangeRedVioletBlue

GrayYellowBrown

Figure 41. Alarm cable general

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25 p. female

12x0,14+shield

25 p. female15 p. male

15 p. male

SSUalarm outputs

ADR"LOOPS"

Power input 1Power input 2InputInput qualityExternal common (Not urgent)Internal common (Urgent)OutputInternal poweringNCCPURubidiumGPS

123456789

10111213

141516171819202122232425

Shield Shield

Common return Black

Light greenGreenPinkLight grayOrangeRedVioletBlue

GrayYellowBrown

12131415

56

78

Loop 4Loop 3

Loop 2Loop 1

Figure 42. Alarm cable to SAGEM ADR family multiplexer. Partial service

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25 p. female

SSUalarm outputs

25 p. female 15 p. male

Input qualityExternal commonInternal common (Urgent)Output

RubidiumGPS

12345678910111213

141516171819202122232425

10x0,14+shield

1660 Congi A (slot 10) C2 or Congi B (slot 12) C2ext alarm connection

15 p male

1 GND

HK-IN Slot10 Slot1210 6 (12)14 2 (8)15 1 (7)13 3 (9)

12 4 (10)11 5 (11)

Shield

25 p. female

Figure 43. Alarm cable to Alcatel Optinex family multiplexer. Partial service

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SSUalarm outputs

Power input 1Power input 2InputInput qualityExternal commonInternal common (Urgent)OutputInternal poweringNC CPURubidiumGPS

123456789

10111213

141516171819202122232425

Shield+1 wire

Shield+1 wire

1660 Congi A (slot 10) C2 and Congi B (slot 12) C2ext alarm connection

1 GND15 114 2 13 312 411 510 615 7 14 813 912 10 11 1110 121 GND

Slot 10 C2

Slot 12 C2

SSUalarm outputs

CONGI slot 10C2 HK alarm inputs

CONGI slot 12C2 HK alarm inputs

25 p. female

15 pin male

15 pin male

10x0,15+shield

10x0,15+shield

Figure 44. Alarm cable to Alcatel Optinex family multiplexer. Full service

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25 p. female

15 p. male

SSUalarm outputs


NB2 8 HKext alarm connection

InputInput qualityExternal commonInternal common (Urgent)OutputInternal power

RubidiumGPS

123456789

10111213

141516171819202122232425

GND

CPI1CPI2CPI3CPI4CPI5CPI6

CPI7CPI8

Shield

Body

123456

78

Body

10x0,14+shield

Figure 45. Alarm cable to Alcatel 1551/1561 SM multiplexer

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25 p. female

9 p. male

SSUalarm outputs


S-15Aext alarm connection

InputInput qualityExternal commonInternal common (Urgent)OutputInternal power

RubidiumGPS

123456789

10111213

141516171819202122232425

GND

CPI1CPI2CPI3CPI4CPI5CPI6

CPI7CPI8

Shield

Body

123456

78

9

10x0,14+shield

Figure 46. Alarm cable to Nortel TN-4x, TN-16x multiplexer

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4.6 Typical installation set for PW 1006/1008installation

Description Quantity

PW 1006/1008 equipment. Preassembled and commissioned for immediate operation. Subunit setup according to quotation.

1 piece.

Power cable with 7p. D-sub equipment connector. 5m typical. 2 pieces

2 A current circuit breaker for power distribution box extension. 2 pieces

Alarm cable general with 25p. D-sub equipment connector. 5m typical

1 piece

Equipment ground cable 1 piece

Straight, 9p. D-sub male-female serial cable 1 piece

Screw set for PW 1006 equipment installation 1 set

Table 19. Installation set for PW 1006/1008

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5. Abbreviations

Abbreviation Meaning Reference

AIS Alarm Indication Signal ITU-T Rec. O.162

CPU Central Processing Unit

CPW 1006 Compact Synchronization Supplies Unit

CEP Circular Error Probability GPS positioning error 50% probability

EPROM Erasable Programmable Read Only Memory

ETSI EN Euro norm according to European Telecommunications Standard Institute standard

GPS Global Positioning System

HDD Hard Disk Drive

ITU-T International Telecommunication Union Telecommunication Standardisation Sector

MTIE Maximum Time Interval Error G.811, G.812, ETS 300 462-1

PC Personal Computer

PDH Plesiochronous Digital Hierarchy G.704

PLL Phase Locked Loop

PRC Primary Reference Clock G.811, ETS 300 462-6

RAM Random Access Memory

SEC SDH Equipment Clock ETS 300 462-5

PW 1006 Synchronization Supplies Unit ETS 300 462-4

TDEV Time Deviation ETS 300 462-1

TIE Time Interval Error G.811, G.812, ETS 300 462-1

UI Unit Interval At 2.048Mbit/s this value is 488 ns

— End of this document —

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