37550617 dual duplexer

Nokia Flexi EDGE BTS DualDuplexer Module (ERxA)Description

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# Nokia Siemens Networks 1 (27)

471841A.101Nokia Flexi EDGE Base Station, Rel. EP2,Product Documentation, v.1

The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This documentation is intended for theuse of Nokia Siemens Networks customers only for the purposes of the agreement under whichthe document is submitted, and no part of it may be used, reproduced, modified or transmitted inany form or means without the prior written permission of Nokia Siemens Networks. Thedocumentation has been prepared to be used by professional and properly trained personnel,and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomescustomer comments as part of the process of continuous development and improvement of thedocumentation.

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2 (27) # Nokia Siemens Networks DN70251227Issue 3-0 en13/06/2008

Nokia Flexi EDGE BTS Dual Duplexer Module (ERxA) Description

Contents

Contents 3

1 Summary of changes 5

2 Dual Duplexer Module (ERxA) 7

3 Dual Duplexer Module (ERxA) main blocks 11

4 Dual Duplexer Module (ERxA) power requirements 13

5 Dual Duplexer Module (ERxA) interfaces 155.1 Lightning protection requirements 16

6 Dual Duplexer Module (ERxA) dimensions and weight 19

7 Dual Duplexer Module (ERxA) LED indications 21

8 Dual Duplexer Module (ERxA) antenna sharing features 23

9 Contents of the Dual Duplexer Module (ERxA) delivery 27

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Contents

1 Summary of changesChanges between issues 3-0 and 2-0

Updated chapters:

. Dual Duplexer Module (ERxA) table for frequency bands updated.

. Dual Duplexer Module (ERxA) antenna sharing features updatedwith information on feederless configurations.

. Dual Duplexer Module (ERxA) LED indications table for LEDsupdated.

. Contents of the ERxA delivery updated with information onpreinstalled screws.

Changes between issues 2-0 and 1-0

New chapters:

. Summary of changes

. Dual Duplexer Module (ERxA) antenna sharing features

Updated chapters:

. Section Dual Duplexer Module (ERxA) updated with information onDual Duplexer Module software. Added a table for frequency bandsfor each variant.

. Section Dual Duplexer Module (ERxA) power requirements Tableupdated with information on power consumption with and withoutMHAs.

. Section EDGE Dual Duplexer Module (ERxA) interfaces table (rows3-5) updated and a new table with lightning protection requirementsfor antenna ports added.

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Summary of changes

2 Dual Duplexer Module (ERxA)

The Dual Duplexer Module and the Dual TRX Module (EXxA) create oneSector Module. At least one Dual Duplexer Module is needed per sector,depending on the configuration (concerns non-RTC configurations). TheDual Duplexer Module is always attached to the Dual TRX Module, whichprovides the Dual Duplexer Module with power and O&M link. ExtensionDual TRX Modules are installed without the Dual Duplexer Module.

The Dual Duplexer Module provides two antenna connections (configuredfrom 1 or 2 sectors) of Nokia Flexi EDGE BTS for by-pass and widebandcombined configurations. The Dual Duplexer Module supports antennasharing (co-siting) with another BTS as long as the frequency range meetsthe given Nokia specifications.

The Dual Duplexer Module contains two duplex filters, two low-noiseamplifier (LNA) chains, two Bias-Ts, and a common TRX loop for TRXs inone sector. The TRX loop is controlled through the Sector Module.

The Bias-T is a circuit and function to supply power to an MHA. The ReturnLoss monitor is a separate circuit and function that is independent of theBias-T. The functionality is now in the Dual Duplexer Module, and aseparate unit on top of BTS cabinets common in traditional solutions is nolonger needed.

The MHA current monitor allows the BTS to determine an alarm or faultcondition of the MHA.

The TX forward power alarm allows the BTS to report an alarm ifinsufficient TX power is at the DDU's TX connector.

The LNAs have two gain states:

1. high-gain and

2. adjustable low-gain settings.

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Dual Duplexer Module (ERxA)

The high-gain state (HGS) is the default mode when the BTS is notconfigured with an MHA. The low-gain state (LGS) is used when the BTSis configured with an MHA; the LGS settings, which are in 0.5dB steps, areused to overcome the cable loss for the cable connecting the MHA to theDDU's antenna connector.

There is a separate Dual Duplexer Module for each frequency band:

. ERTA – GSM800

. ERGA – GSM900 full band

. ERHA – GSM900 SB-H

. ERJA – GSM900 SB-J

. ERDA – GSM1800 full band

. ERPA – GSM1900 full band

Table 1. Frequency bands for each variant

Band RX (MHz) TX (MHz) ARFN

900

(ERGA) / (E-GSM)

890.0 – 915.0

880.0 – 890.0

935.0 – 960.0

925.0 – 935.0

1 – 124

975 – 1023.0

900J (ERJA) 890.0 – 915.0 935.0 – 960.0 1 – 124

900H (ERHA) 897.5 – 915.0 942.5 – 960.0 38 – 124

1800 (ERDA) 1710.0 – 1785.0 1805.0 – 1880.0 512 – 885

1900 (ERPA) 1850.0 – 1910.0 1930.0 – 1990.0 512 – 810

800 (ERTA) 824.0 – 849.0 869.0 – 894.0 128 – 251

See the following figure for an isometric view of the Dual Duplexer Module.



Figure 1. Isometric view of the Dual Duplexer Module

The Dual Duplexer Module can store two software versions: Active andBackup. The Dual Duplexer Module is always connected to a Dual TRXModule. After a Dual TRX Module reset, the Dual Duplexer Modulesoftware version is checked. If the Dual Duplexer Module does not containcorrect software matching with the running BTS software version, the newDual Duplexer Module software is downloaded from the Dual TRX Module.

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Dual Duplexer Module (ERxA)

3 Dual Duplexer Module (ERxA) mainblocks

The Dual Duplexer Module (ERxA) includes the following functionalblocks:

. Duplex Filter. RX and TX filtering. TX and RX coupling to one antenna interface

. RX Front End. RX low-noise amplifier (LNA). RX Multicoupling. Support for co-siting (antenna sharing)

. TRX Loop. TRX loop path between Dual Duplexer Module's TX input and

RX output. Signal mixing from TX to RX band. Timeslot-based capability to run loops. Loop connection capability from either TX input to any RX

Output

. Bias-T alarm. Masthead amplifier (MHA) interface and power supply. Antenna supervisory

. Return Loss monitor values are reported to the TRX O&M.

. The MHA current monitor allows the BTS to determine an alarm orfault condition of the MHA.

. The TX forward power alarm allows the BTS to report an alarm ifinsufficient TX power is at the DDU's TX connector.

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Dual Duplexer Module (ERxA) main blocks

Figure 2. Dual Duplexer Module main blocks

TX B

TX A

CoRx out

ANT B

PowerSupply &Digital I /O

RXA1 4

Ext A

BiasTee /VSWRalarm

Gain /AlarmLogic

BiasTee /VSWRalarm

TRX Loop

DigitalLogic

RXB1 4

ANT A

Ext B

RXA ORXA I

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4 Dual Duplexer Module (ERxA) powerrequirements

Dual Duplexer Module (ERxA) power requirements

The DDU's voltage is 13.7V +/- 3% and is supplied by the TRX.

Dual Duplexer Module power consumption

Table 2. Dual Duplexer Module power consumption

Property ERTA/ERGA/ERHA/ERJA (800/900)

ERDA/ERPA (1800/1900)

Maximum at maximum 13.7V and 2.6A

Nominal 32.6 W

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Dual Duplexer Module (ERxA) power requirements

5 Dual Duplexer Module (ERxA) interfaces

Figure 3. Nokia Flexi EDGE Dual Duplexer Module (ERxA) front panelconnectors and labels

Table 3. Nokia Flexi EDGE Dual Duplexer Module(ERxA) front panel connectors and interfaces

Label name on module Description Connector type Interface(s)

Ant A, Ant B Antenna interface 7/16 Antenna jumper or feedercables

TxA, TxB (red) 2 Tx inputs QMA EXxA, EWxA, EWxB

ExtA, ExtB (blue) 2 external Rx outputs QMA External receiver

DN70131603

TxA

ExtA

RxAO

RxAI

RxA1

RxA2

RxA3

RxA4

RxB4

RxB3

RxB2

RxB1

ExtB

TxB

ANT A

ANT B

Caution,Hot Surface

Electrostaticalsensitivedevice

Groundingpoint

LED

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Dual Duplexer Module (ERxA) interfaces

Table 3. Nokia Flexi EDGE Dual Duplexer Module(ERxA) front panel connectors and interfaces(cont.)

Label name on module Description Connector type Interface(s)

ExtA

RxAO

Provides an external BTS withthe RX diversity signal from ANTA when antenna sharing (co-siting) is used.

QMA External BTS NOTE: Thepre-installed RxAO-RxAIcable on the Dual DuplexerModule must remainconnected for all standard,non-antenna sharingconfigurations. It is requiredfor a complete RF pathfrom ANT A to RxA1-4.See the figure in sectionDual Duplexer Modulemain blocks for anillustration.

RxAI Receives Rx signal input from anexternal BTS source whenantenna sharing (co-siting) isused. It is connected to RxA1-4.

QMA External BTS NOTE: Thepre-installed RxAO-RxAIcable on the Dual DuplexerModule must remainconnected for all standard,non-antenna sharingconfigurations. It is requiredfor a complete RF pathfrom ANT A to RxA1-4.See the figure in sectionDual Duplexer Modulemain blocks for anillustration.

ExtB Provides an external BTS withthe RX diversity signal from ANTB when antenna sharing (co-siting) is used.

QMA External BTS

5.1 Lightning protection requirements

Table 4. Lightning protection requirements for antenna ports

Lightning protection requirements for antenna ports

Over current pulse between the center conductor and shield of the ANT port: +/- 3kA, 10/350 µs pulse



Table 4. Lightning protection requirements for antenna ports (cont.)

Lightning protection requirements for antenna ports

Over current pulse between the shield of the ANT port and BTS mechanicsgrounding point: +/- 20 kA, 10/350 µs pulse

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Dual Duplexer Module (ERxA) interfaces

6 Dual Duplexer Module (ERxA)dimensions and weight

The dimensions of the Flexi EDGE Dual Duplexer Module are presented inthe table below.

Table 5. ERxA dimensions and weight

Property Maximum value

Width 1) 447/492 mm

(17.6/19.4 in.)

Height 44 mm

(1.7 in.)

Depth 2) 422/560 mm

(16.6/22.1 in.)

Weight 10.8 kg

(23.9 lbs)

1) Width of the casing without front covers/with front covers

2) Depth of the casing without front covers/with front covers

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Dual Duplexer Module (ERxA) dimensions and weight

7 Dual Duplexer Module (ERxA) LEDindications

The Dual Duplexer Module (ERxA) has one tri-colour LED on the frontpanel to indicate the operational status of the module and all faultconditions during operation.

Table 6. Dual Duplexer Module LED indications

Colour Explanation

Red Dual Duplexer Module software is not running, or

Major alarm (on both antenna paths)

Red, blinking Minor alarm (on one or both antenna paths), or

Major alarm (on one antenna path)

Yellow, blinking SW start-up or configuration ongoing

Green Module operational (cell can be locked in BSC)

Green, blinking Module is loading software

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Dual Duplexer Module (ERxA) LED indications

8 Dual Duplexer Module (ERxA) antennasharing features

The Dual Duplexer Module (ERxA) can be configured to share the Rxdiversity signal between Flexi EDGE BTS and an external BTS. Antennasharing is not supported in feederless configurations.

The following Dual Duplexer Module interfaces can be used for sharing Rxsignals:

. ExtA and RxAO are used to provide an external BTS with the RXdiversity signal from ANT A.

. RxAI is used to receive Rx signal input from an external BTS source.It is connected to RxA1-4.

. ExtB is used to provide an external BTS with the RX diversity signalfrom ANT B.

Note that the pre-installed RxAO-RxAI cable on the Dual Duplexer Modulemust remain connected for all standard, non-antenna sharingconfigurations. It is required for a complete RF path from ANTA to RxA1-4.See figure Dual Duplexer Module main blocks in Dual Duplexer Module(ERxA) main blocks.

Custom RF cables are required between the Dual Duplexer Module andan external BTS. The QMA interface on the Flexi EDGE BTS side mustuse IP QMA boots approved by Nokia Siemens Networks.

Common cases for Dual Duplexer Module antenna sharing are (see alsothe following figures):

. Flexi EDGE BTS provides Rx diversity signal to an external BTS. Pre-installed RF cable from RxAO to RxAI stays connected. RF cables are connected from ExtA and ExtB to an external

BTS

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Dual Duplexer Module (ERxA) antenna sharing features

. Flexi EDGE BTS uses an external BTS RX signal for RX diversity. RF cable is connected from an external BTS to RxAI. No RF cables are connected to ExtA, RxAO, and ExtB.

. Flexi EDGE BTS provides Rx diversity signal to an external BTS anduses an external BTS RX signal for RX diversity. RF cable is connected from an external BTS to RxAI. RF cables are connected from ExtA and ExtB to an external

BTS. RxAO can also be used to provide an Rx diversity signalto an external BTS.

The RX signals with co-sited antenna lines must be at the same level.

Figure 4. Flexi EDGE BTS provides Rx diversity signal to an external BTS

TxA

ExtA

RxAO

RxAI

RxA1

RxA2

RxA3

RxA4

RxB4

RxB3

RxB2

RxB1

ExtB TxB

RX from antennaB to external BTS

RX from antennaA to external BTS

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Figure 5. Flexi EDGE BTS uses an external BTS RX signal for RX diversity

Figure 6. Flexi EDGE BTS provides Rx diversity signal to an external BTS anduses an external BTS RX signal for RX diversity

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TxA

ExtA

RxAO

RxAI

RxA1

RxA2

RxA3

RxA4

RxB4

RxB3

RxB2

RxB1

ExtB

TxB

RX from externalBTS to RxA1-4

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TxA

ExtA

RxAO

RxAI

RxA1

RxA2

RxA3

RxA4

RxB4

RxB3

RxB2

RxB1

ExtB TxB

RX from externalBTS to RxA1-4

RX from antenna Ato external BTS

RX from antennaA to external BTS

RX from antennaB to external BTS

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Dual Duplexer Module (ERxA) antenna sharing features

9 Contents of the Dual Duplexer Module(ERxA) delivery

Table 7. Nokia Flexi EDGE Dual Duplexer Module (ERxA) delivery contents

Description Product code Quantity

EDGE Dual Duplexer Module (ERxA): 1

. EDGE Dual Duplexer Module 800 MHz (ERTA) . 470249A

. EDGE Dual Duplexer Module 900 MHz (ERGA) . 470250A

. EDGE Dual Duplexer Module 900 MHz SB-J(ERJA)

. 470251A

. EDGE Dual Duplexer Module 900 MHz SB-H(ERHA)

. 470252A

. EDGE Dual Duplexer Module 1800 MHz (ERDA) . 470253A

. EDGE Dual Duplexer Module 1900 MHz (ERPA) . 470254A

M5 screws (preinstalled) 2

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Contents of the Dual Duplexer Module (ERxA) delivery

37550617 dual duplexer

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