setting idb parameters

Setting IDB Parameters, R10 to R12, 06A,06B

OPERATING INSTRUCS

Copyright

© Ericsson AB 2007 – All Rights Reserved

Disclaimer

No part of this document may be reproduced in any form without the writtenpermission of the copyright owner.

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

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Contents

Contents

1 Introduction 1

1.1 Work Process for Setting the IDB Parameters 1

1.2 Revision Information 3

2 Prerequisites 5

3 Creating IDB 7

4 Connecting the OMT 9

5 Reading the IDB 11

6 Opening IDB from File 13

7 Defining Present RUs 15

8 Defining Alarm Inputs (External Alarms) 17

9 Defining ALNA/TMA Parameters 21

10 Defining Loss and Checking the Total Gain Value 23

11 Defining Battery Backup Time Test Parameters 25

12 Defining Battery Parameters 27

13 Defining Climate 31

14 Defining Delay 33

15 Defining GPS Parameters 35

16 Defining Hardware Information 37

17 Defining PCM 39

17.1 Transmission Interface E1, 75 39

17.2 Transmission Interface E1, 120 39

17.3 Transmission Interface T1, 100 41

17.4 Defining LBO Parameters as Short Haul 43

17.5 Defining LBO Parameters as Long Haul Manually 45

17.6 Defining LBO Parameters as Long Haul Automatically 47

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Setting IDB Parameters, R10 to R12, 06A, 06B

17.7 Defining LBO Parameters when TransmissionCharacteristics are Unknown 50

18 Defining RBS Identity 51

19 Defining System Voltage 53

20 Defining TEI 55

21 Defining TNOM 57

22 Defining VSWR Limits 59

23 Saving IDB 63

24 Installing IDB 65

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Introduction

1 Introduction

This document describes how to set the IDB parameter, excluding TGsynchronization parameters, using the Operation and Maintenance Terminal(OMT). The document is for use with BTS R10, R11, R12, 06A or 06B software.

For more detailed information on the use of the OMT, for example, when todefine a parameter, why the parameter should be set, which values are valid,and the consequences of not setting a parameter, see OMT User’s Manual,EN/LZN 720 0001.

Note: For OMT Version R31 and later, the OMT parameters are also includedas on-line help.

The IDB parameters can be loaded to the RBS in two ways:

• By connecting the OMT to the DXU and installing the IDB

• By inserting a flash card with the new IDB into the DXU

1.1 Work Process for Setting the IDB Parameters

This section describes the work process for setting the IDB parameters.

Information about which procedures that must be followed is given in the SiteInstallation Documentation.

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P014549C

Reading IDB

Connecting the OMT

Creating IDB

Defining Present RUs

Defining Alarm Inlets(External Alarms)

Defining ALNA/TMAParameters

Defining Loss and Checkingthe Total Gain Value

Defining Battery Parameters

Defining Battery BackupTime Test Parameters

A

Defining Delay

Defining Climate

Opening IDB from File

Start

Figure 1 Work Process for Setting the IDB Parameters (Part 1 of 2)

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Introduction

Defining HardwareInformation

Defining TNOM

Defining VSWR Limits

Saving IDB

Installing IDB

Defining RBS Identity

Defining PCM

Defining System Voltage

Defining TEI

P014550D

A

Defining GPS Parameters

Figure 2 Work Process for Setting the IDB Parameters (Part 2 of 2)

1.2 Revision Information

Rev. H

• VSWR section updated with note that this does not apply to RBS 2116or RBS 2216

• Word "SID” changed to Site Installation Documentation

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Prerequisites

2 Prerequisites

Before setting the IDB parameters, ensure the following:

• The test record from the document Verifying Antenna Systems is available

• The RBS Synchronization Manual is available, if TG synchronization isused, see:

• Documentation and tools necessary for the work must be available.

OMT

The OMT kit contains the OMT software and user’s manual, as well as a cable(RPM 517 54/3) used to connect the OMT to the RBS in the field.

Various kit versions are available depending on the configuration of the RBSand its software. Contact your Ericsson market unit representative for moreinformation.

Documentation

The following documents are referenced in this document, ensure that theyare available:

• Site Installation Documentation

• OMT User’s Manual, EN/LZN 720 0001

• RBS SW Update, 13/1541-LZA 701 0001

• Verifying Antenna Systems, 1/1532-LZA 701 0001.

• Setting TG Synchronization Parameters, for specific RBS. Only if TGsynchronization is used.

• GPS Synchronization in RBS *, RBS specific document. Only if GPSparameters shall be set.

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Creating IDB

3 Creating IDB

This section describes how to define the configuration setup in the OMT.

Note: If the flash card has to be removed when creating the IDB, see thedocument RBS SW Update.

Defining Transmission Interface

1. Start the OMT.

2. On the RBS 2000 menu, click Disconnect to logically disconnect theOMT from the RBS.

3. On the Configuration menu, click Create IDB to open the Create IDBwindow.

4. Select transmission interface.

Defining Cabinet Setup

5. To add cabinets to the Cabinet Setup box, click New to open the DefineSetup for Cabinet window.

6. In the Cabinet Type box, select the cabinet type.

7. In the Power System box, select power system.

8. In the Climate System box, select climate system (if applicable).

9. Click OK.

Defining Antenna Sector Setup

10. To add antenna sectors to the Antenna Sector Setup box, click New toopen the Antenna Systems for Sector window.

11. In the Antenna Systems for Sector window, click New to open the DefineAntenna System window.

12. In the Frequency box, select the frequency used.

13. In the CDU type box, select the CDU type used.

14. In the duplexer type box, select the duplexer type used (if applicable).

15. In the TMA box, select one of the following:

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BTS R10 or R11 software, and RBSnot equipped with dTRU:

Yes if TMAs without external powerhave been installed.

No if externally-powered TMAs havebeen installed

BTS R10 software and RBSequipped with dTRU:

Yes if TMAs have been installed.

No if TMAs have not been installed

BTS R12, 06A or 06B software: Yes if TMAs have been installed.

No if TMAs have not been installed

16. In the TX combining box, select the applicable combining type.

17. In the RX antenna sharing box, select if RX antenna sharing will be used (ifapplicable).

18. In the RX diversity box, select the applicable RX diversity type.

19. Click OK in the Define Antenna System window to confirm.

20. If additional antenna systems will be defined in the sector, then repeatthe steps above.

21. In the Antenna Systems for Sector window, verify that the correctparameters have been entered. Click OK.

22. Define the remaining antenna sectors as described above.

23. Click OK in the Create IDB window, when all antenna sectors are defined.

Selecting the Final Configuration

24. In the Final Configuration Selection window, select the site cell configuration(SCC).

25. Verify that the correct parameters have been entered. Click OK.

26. In the OMT dialogue box asking ‘‘Do you want to reuse data in the previousconfiguration?’’, click one of the following:

Yes (for IDB modification only)

No (for configuration of entirely new IDB)

27. In the OMT dialogue box asking ‘‘Do you really want to overwrite the IDBdata in the OMT?’’, click Yes.

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Connecting the OMT

4 Connecting the OMT

This section describes how to physically connect the OMT to the RBS.

1. Connect the OMT cable from the PC serial port 1 to the OMT port on theDXU.

2. Start the OMT.

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Reading the IDB

5 Reading the IDB

This section describes how to read the IDB to check that the values of theIDB parameters are correct.

1. On the RBS 2000 menu, click Connect.

2. On the Configuration menu, click Read IDB.

3. On the Configuration menu, click Display and Information to enter theDisplay Information window.

4. Select IDB and click Run. Check the parameters in the table below.

Table 1 Reading and Checking IDB

Check that the Following Parameters are Correct: OK

Transmission interface

Cabinet configuration(s)

Antenna sector configuration(s)

5. Close the Display Information window.

6. Check the present RUs by choosing View in the Menu and select Cabinet.

7. If the IDB parameters in the table above need to be set, then see Section 3on page 7.

If the IDB parameters above are correct, set the applicable site-specificIDB parameters from the list below. Follow the procedures defined in thefollowing sub-sections:

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• Alarm inlets (external alarms)

• ALNA/TMA parameters

• Defining loss and checking the total gain value

• Battery backup time test parameters

• Battery parameters

• Climate

• Delay

• GPS Parameters

• Hardware Information

• Transmission (PCM) parameters

• RBS Identity

• System voltage

• TEI value

• TNOM parameters

• VSWR alarm limits

8. On the RBS 2000 menu, select Disconnect to disconnect the OMTlogically from the RBS.

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Opening IDB from File

6 Opening IDB from File

This section describes how to open a saved IDB file from disk.

1. Start the OMT.

2. In the Configuration menu, select Open IDB.

3. Locate and select the saved IDB file to be opened.

4. Click Open in the Open IDB dialog box to confirm.

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Defining Present RUs

7 Defining Present RUs

This section describes how to check and, if necessary, define the RUs whichare present (or not present) in the RBS.

To avoid Hardware and IDB inconsistency, the RBS must know which RUsshould be present.

By setting RUs to Present/Not present, the RBS recognizes which RUs can beused (present) and which are not present.

The following RUs are not automatically updated and must therefore be defined:

• BFU

• DC/DC converter

• EPC bus

• FCU

• PSU

• TMA CM

The following RUs are automatically marked as present when the RU isdetected:

Note: The RUs cannot be removed when in traffic.

• TRU

• DRU

• RRU

Define the RUs Present/Not present as follows:

1. If the OMT is not logically disconnected from the RBS, then clickDisconnect on the RBS 2000 menu.

2. On the Configuration menu, click Define and Present RUs to open theDefine Present RUs window.

3. If necessary, move the RUs in the configuration used to the Present box byselecting the RU to be moved and clicking the ← key (or double-clickingthe RUs to be moved).

If RUs Not Present in the configuration are in the Present box, then movethem to the Not Present box by clicking the → key.

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4. Click OK when finished.

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Defining Alarm Inputs (External Alarms)

8 Defining Alarm Inputs (External Alarms)

This section describes how to define the external alarms, if applicable.

To enable the supervision of devices connected to the external alarm interfaceof the RBS, several parameters need to be set.

For an overview of the available parameter settings for external alarms, seetable below.

Table 2 External Alarm Settings

Parameter Valid Values Default Description

Type • Closing

• Breaking

Closing Specifies how an externaldevice indicates an alarmand must be set to enablecorrect supervision. A faultis indicated by closing orbreaking the sensor loop.

ID • 0 – 9

• A – F

0 Uniquely identifies the externalalarm equipment. The value issent in external alarm reportsto the O&M centre.

Severity • Level 1

• Level 2

Level 1 Indicates the severity of theexternal alarm. The operatordetermines the values to beused for the alarms.

Comment Characterstring withup to 62characters.

Valid characters are: 0..9 A..Zspace ! # $ %& ’ ( ) * + , - . / :; < = > ? _

An emptycharacterstring

The operator can add adescription of the externalalarm. The value is sent to theO&M centre in external alarmreports.

Note: Some DC/DC converters are factory-installed to alarm input 16 in theexternal alarm unit. Input 16 is therefore unavailable in such cases.

Note: If a smoke detector is factory-installed it is hard-coded to alarm input2 and 3 in the external alarm unit. Inputs 2 and 3 are thereforeunavailable in such cases.

1. On the Configuration menu, click Define and Alarm Inlets to open theDefine Alarm Inlets window.

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2. In the Alarm Inlet Information window, select an unused alarm inlet.

3. In the Inlet Usage box, select ‘‘External Alarm’’.

4. In the Type box, define the alarm type as ‘‘Closing’’ (when there is analarm, the alarm cable closes) or ‘‘Breaking’’ (when there is an alarm, thealarm cable breaks).

5. In the ID box, select an alarm inlet number.

6. In the Severity box, set the severity level of the alarm.

7. Add a comment in the Comment box, if required.

8. Click Apply after defining the alarm.

9. Repeat steps 2 to 8 to define the remaining alarms.

10. Click OK when all alarms have been defined.

If the RBS contains an internal factory-installed DC/DC converter, seedocument RBS Product Description. The alarm output of the DC/DC converteris connected to the alarm inlets. Define the DC/DC converter as an externalalarm with the following parameters:

Alarm Inlet 0/16

Inlet Usage External Alarm

Type Breaking

ID F

Severity 1

Comment DC/DC CONVERTER FAILURE

If the RBS contains a smoke detector, the alarm outputs of the smoke detectoris connected to the alarm inlets. Define the smoke detector alarms as externalalarms with the following parameters:

Alarm Inlet 0/2


Type Breaking

ID 1

Severity 1

Comment FIRE

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Defining Alarm Inputs (External Alarms)

Alarm Inlet 0/3


Type Breaking

ID 2

Severity 2

Comment SMOKE DETECTOR FAILURE

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Defining ALNA/TMA Parameters

9 Defining ALNA/TMA Parameters

This section describes how to set the ALNA/TMA parameters (if applicable).

The TMA parameters must be set when a TMA is connected and thecharacteristics of the TMA are different from the default values in the IDB filesin the OMT. If any parameter is missing, the default values should be used.

1. On the Configuration menu, click Define and ALNA/TMA.

2. In the Define ALNA/TMA window, select the appropriate TMA and clickRun.

3. Set the parameters listed below. See the installation instructions for theTMA.

Table 3 ALNA/TMA Parameters


TMA type • GSM

• TDMA

• GSM bypass

• TDMA bypass

• Externallypowered

• GSM 800/900/1800/1900(Ericssonstandard GSMTMA)

Determines the TMA type, how the TMAis to be supervised, how faults are tobe reported, and whether the TMA hasbypass functionality. This parametermust be changed when a TMA typeother than the GSM (Ericsson standardGSM TMA) or compatible TMA is used.Available TMA types also depend on theconfiguration

TX groupdelay

0 – 1, 000 ns 22 ns Specifies the TX signal delay in the TMA.TMA TX group delay is part of the total TXpath delay in the RBS, which is neededto synchronize the TX burst transmissionof all TRXs. If the default value differsfrom the value in the TMA equipmentspecification, then it must be updated.

RX groupdelay

0 – 1, 000 ns 101 ns TMA RX group delay is part of thetotal RX path delay in the RBS whichis needed to calibrate the timing in theTRX receiver. If the default value differsfrom the value in the TMA equipmentspecification, then it must be updated.

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Table 3 ALNA/TMA Parameters


Loss(1) 24 dB – +24dB

GSM 800/900/1800: 12 dB

GSM 1900:10.934 dB

The TMA loss is part of the total RXpath loss in the RBS, which is needed tocalibrate the TRX and thereby optimizethe RF performance of the RBS. If theTMA loss parameter differs from thedefault values it must be updated.

RX frequencyrange (MHz)

824.2 – 848.8 MHz (GSM 800)

880.2 – 914.8 MHz (GSM 900)

1710.2 – 1784.8 MHz (GSM 1800)

1850.2 – 1909.8 MHz (GSM1900)(2)

Specifies the supported RX frequencyrange for the TMA.

Currentsupervisionlimits

0 – 500 mA GSM 800/900:

33 mA (low)

237 mA (high)

GSM1800/1900:

33 mA (low)

150 mA (high)

Specifies the limits of TMA currentsupervision. One type of fault is set if thesupply current to the TMA is constantlyabove the high limit or below the lowlimit. Another type of fault is set if theTMA repeatedly alters the supply currentto above or below the high limit. Theparameters must be updated if thecurrent supervision limits for the TMAdiffer from the default values.

(1) TMA loss = �TMA gain(2) Valid values = default values

Note: If externally powered TMAs have been configured, then the currentsupervision limits cannot be set.

4. Click OK when all parameters are set.

5. Repeat steps 2 to 4 for all TMAs. Close the Define ALNA/TMA window.

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Defining Loss and Checking the Total Gain Value

10 Defining Loss and Checking the Total GainValue

This section describes how to define the loss of the RX feeders and to checkthat the total gain value is within limits.

Defining Loss

To sustain uplink RX sensitivity and optimize the RF performance of the RBS, itis essential to define the correct value for the loss parameter. That includeslosses from jumper cables, combiners, splitters and RF filters of an RX feederchain with attached TMA.

For a TMA configuration, this means that if the feeder loss value, measuredand calculated in the document Verifying Antenna Systems, differs from thedefault loss value of 3.996 dB, then the loss parameter must be updated to thefeeder loss value. See test record from Verifying Antenna Systems.

For non-TMA configurations, the loss parameter is kept to the default value of 0dB. The default value may be kept in this case, because the feeder loss is notpart of the total RX path loss in this type of configuration.

This is how to define loss:

1. On the Configuration menu, click Define and Loss to open the DefineLoss window.

2. Select the appropriate RX feeder (for example FEED_TXA_RXA 0), andclick Run.

3. In the Define Loss window, enter the Total Feeder Attenuation from the testrecord for Antenna System Tests and click OK.

4. Repeat steps 2 to 3 for each RX feeder.

5. Close the Define Loss window, when finished.

Checking the Total Gain Value

The purpose of this check is to ensure that the Total Gain value is withinsystem performance limits.

1. Calculate the Total Gain value using the following formula:

Total Gain = TMA Gain - Total Feeder Attenuation

2. Compare the calculated value to the Max. and Min. values in the tablebelow.

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Gain TOTmin ≤ Total Gain ≤ Gain TOTmax

See example below.

Table 4 System Performance Limits

GSM System Gain TOT (dB)

Min. Max.

GSM 800/900 7 10

GSM 1800/1900 7 12

The values in the table guarantee the specified sensitivity performance, andthat the GSM specification is met.

The following example illustrates what is said above.

Preconditions: GSM 1800/1900 CDU-GTMA Gain = 12 dBTotal Feeder Attenuation = 4 dBTotal Gain = TMA Gain - Total Feeder Attenuation == 12 – 4 = 8 dBResult: 7 ≤ 8 ≤ 12

Example 1 Checking that the Total Gain Value is Within Limits

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Defining Battery Backup Time Test Parameters

11 Defining Battery Backup Time TestParameters

This section describes how to define the test parameters for the battery backuptime test. This test is used to check the battery backup time continuously,without the need for personnel on site. The result is saved in the RBS, and canbe read by site personnel using the OMT.

If enabled, the test forces the RBS run on battery backup until it reaches asystem voltage level (22.5 – 23.5 V) set by the user, where the test will stop.

The time run on battery backup is measured and compared with the expectedbackup time defined for the batteries.

The test is considered successful if the measured backup time exceeds theexpected backup time.

Table 5 Battery Backup Time Test Parameters


Enable test • Yes (enabled)

• No (disabled)

No (disabled) Enables the battery backup time test.

Start date YY-MM-DD YY-MM-DD The battery backup time test is a cyclicfunction and it is therefore necessary to statea start date for the test.

Start time 00:00 – 23:59

(hh:mm)

00:00

(hh:mm)

Defines the time of day when the batterybackup time test is performed.

Voltage levelto stop thetest

22.5 – 23.5 V 23.0 V Defines the voltage level that stops the test.The test must be stopped before the batteriesare fully discharged. A low level means alonger test period, which gives a more reliabletest result. However, the batteries will be moredischarged, so more time must elapse beforea mains failure can be handled. A high levelresults in a greater difference between themeasured backup time and the true backuptime. The disconnect level main parameterdefines the true backup time, and the voltagelevel that stops the test must be at least 0.3 Vhigher than the disconnect level.

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Table 5 Battery Backup Time Test Parameters


Test interval 60 – 365 days 182 days Defines the number of days between thebattery backup time test. The battery canwear out prematurely if the test is done toofrequently. Also note that repeating a test withdifferent load profiles gives a more accuratetest result.

Expectedbackup time

00:00 – 23:59

(hh:mm)

00:00

(hh:mm)

The expected backup time is compared withthe measured backup time. If it is longer thanthe measured time, then the test is passed.The RBS does not know how much backuptime to expect. To find out whether the backuptime is long enough it is necessary to enterthe expected backup time, which is the sameas the backup time planned for the site. Notethat the default value is 00:00 (no backuptime), which means that the test will alwaysbe successful.

1. On the Configuration menu, click Define and Battery Backup Time TestParameters to open the Define Battery Backup Time Test Parameterswindow.

2. Enable the test by clicking Yes.

3. Enter the start date and time for the test, using the up/down arrows.

4. Enter the system voltage at which the Battery backup Test is to stop.

5. Enter the test interval (in days).

6. Enter the expected backup time for the batteries, using the up/down arrows.


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12 Defining Battery Parameters

This section describes how to define the battery parameters.

The settings of the battery parameters define the performance of the batteriesand their lifetime. The setting of the Alarm Raise limit defines the operatingtemperatures of the batteries. This parameter must not be changed for Ericssonbatteries supplied with the RBS.

System voltage (define using the Define System Voltage function) must beadapted to the chosen charging algorithm. This is particularly important whenusing fixed float charging voltages.

1. On the Configuration menu, click Define and Battery Parameters to openthe Define Battery Parameters window.

2. Select the object to be defined, and click Run.

3. Enter the parameters listed in the table below:

Table 6 Battery Parameters

Parameter Valid values Default Description

Disconnectlevel prioritized

20.0 – 23.8 V 20.8 V Defines the level at which the batteriesare disconnected. Prioritized supply isintended for TM equipment(1). This is thelow voltage disconnect function, which isdesigned to protect the battery from beingoverdischarged.

Disconnectlevel main

20.2 – 24.0 V 21.0 V Sets the voltage at which the RBS isdisconnected from the batteries andindicates how long the battery backuptime will be.(2)

Reconnectlevel

24.0 – 26.0 V 25.5 V Defines the system voltage at whichprioritized supply and batteries are to bereconnected.

Alarm raiselimit

55 – 60�C 55�C Defines the temperature at which a hightemperature alarm is raised. Batteriesare disconnected when the temperaturereaches 5� above the alarm raise limit, andare reconnected when the temperaturedrops 5� below the alarm raise limit.

In service date YYYY-MM-DD YYYY-MM-DD Used by the battery log function and whenset indicates that new batteries have beeninstalled.

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Table 6 Battery Parameters

Parameter Valid values Default Description

Defines the type of charging algorithm touse. The battery type and configurationaffect the parameter setting.

Temperature-compensated

Temperature-compensated charging isrecommended for lead–acid batteries. Ituses high float-charging voltages at lowbattery temperature and low float-chargingvoltages at high temperatures. It can beused when using shared batteries if thebattery temperature sensors are locatedin the same measuring positions.

Fixed voltage Fixed voltage, also called fixedfloat-charging voltage, is recommendedwhen using non-lead batteries or sharedbatteries

Temperature-compensated+ Boost event

See the description of temperature-compensated above. Boost charging isused to obtain optimal charging since lowcharging could reduce battery life. Boostevent is initiated when the battery voltagedrops below 22.5 V.

Temperature-compensated,no Boost time

The only difference between boost eventand boost time is the start time. Boosttime is initiated at midnight when the startdate occurs and then at regular intervals.

Charging mode

Temperature-compensated+ Boostevent/time

Temperature-compensated

Boost event/time is initiated both when thebattery voltage drops below 22.5 V and atmidnight when the start date occurs andthen at regular intervals. See descriptionsof boost time and boost event above.

Perform firstboost charging

YYYY-MM-DD YYYY-MM-DD The parameter defines the first time thatboost time charging is initiated.

Days betweenboost charging

30 – 365 days 175 days The parameter defines the time intervalwhere charging is conducted, when boosttime is selected as the charging mode.

Boost chargetime, boot time

1 – 24 h 6 h The parameter defines the duration ofthe charging when boost time chargingis used.

Boost chargetime, boostevent

1 – 24 h 6 h The parameter defines the duration ofcharging when boost event charging isused.

(1) Prioritized supply is supported only for the BFU-02, BFU-04, BFU-21, or BFU-22.(2) A low-level result in a long backup time for the RBS, but a short backup time for the TM equipment.

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4. Click OK, when all parameters are set.

5. Repeat steps 2 to 4 for remaining objects to be defined.

6. Click Close when finished.

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Defining Climate

13 Defining Climate

This section describes how to define the climate unit.

This parameter gives input to the climate unit about how it is to function.

1. On the Configuration menu, click Define and Climate to open the DefineClimate window.

2. Select the appropriate climate name.


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Defining Delay

14 Defining Delay

This section describes how to define ESB and RX and TX feeder delay.

The parameter specifies the RF signal delay in the feeder. If the total feederdelay value, measured and calculated in the document Verifying AntennaSystems, differs from the default delay (configuration dependent). Then thedelay parameter must be updated to the total feeder delay value (0-10000 ns):See test record from Verifying Antenna Systems.

Note: If TG synchronization is to be defined, see the document Setting TGSynchronization Parameters.

1. On the Configuration menu, click Define and Delay to open the DefineDelay window.

2. Select the cable to define the delay for and click Run.

3. Enter the delay value (in ns) and click OK.

4. Repeat steps 2 to 3 for remaining cables.


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Defining GPS Parameters

15 Defining GPS Parameters

This section describes how to define the GPS parameters.

To be able to use GPS as a synchronization source, the RBS must be equippedwith a GPS receiver.

A GPS receiver is used to achieve a synchronized radio network and works asreference for RF frequency generation and GSM time-based counters.

Parameters for the GPS are set according to the table below.

Table 7 GPS Parameters


GPS present • Yes

• No

No The parameter is automatically changedto Yes when GPS receiver hardware isadded. If the GPS receiver is removed, theparameter must be manually set to No.

GPS RX delay 0 – 65535 ns 0 ns The parameter defines the delays in theGPS receiver, antenna, and cables andis important in achieving a synchronizednetwork.

GPS RX DXU 0 – 65535 ns 0 ns The parameter defines the delays from theGPS receiver to the DXU, including delaysin the OVP unit and is important in achievinga synchronized network.

Note: If the GPS receiver is used only as a reference for RF frequencygeneration, then it is not necessary to set the GPS RX delay and GPSRX DXU parameters.

For more information on GPS Installation, see the document GPSSynchronization in RBS *

1. On the Configuration menu, click Define and GPS Parameters to openthe Define GPS Parameters window.

2. Select Yes for GPS present.

3. Enter the GPS RX delay (in ns), that is, the delay in GPS antenna, GPSfeeder cables and the GPS receiver.

4. Enter the GPS RX DXU delay, that is, the delay from the receiver to theDXU, including the delay in the OVPs.


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Defining Hardware Information

16 Defining Hardware Information

This section describes how to define hardware information for hardwareunits such as feeder cables, fans, a passive RU, or cabinet with memory,if applicable.

The hardware information is defined to make the RBS inventory information,available in the OMT and at the O&M centre, more complete.

Defined hardware information can be displayed, using the OMT functionsDisplay Inventory List and Display Information, or at the O&M centre.

1. On the Configuration menu, click Define and Hardware Info to openthe Define HW Info window.

2. Select the applicable HW unit in the list, and click Run.

3. Enter the hardware information listed below, and click OK when finished.

• Product No.

• Serial No.

• HW Rev.

• Comment

4. Repeat steps 2 to 3 for all applicable HW units.

5. Close the window when finished.

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Defining PCM

17 Defining PCM

This section describes how to define the PCM paramaters for transmission.

• For transmission interface E1, 75 , see: Section 17.1 on page 39

• For transmission interface E1, 120 see Section 17.2 on page 39

• For transmission interface T1, 100 see Section 17.3 on page 41

17.1 Transmission Interface E1, 75 �

This section describes how to define the PCM parameters for transmissioninterface E1, 75 .

1. On the Configuration menu, click Define and PCM.

2. Set the parameters according to the table and instructions below.


Table 8 PCM Parameter Settings for Transmission Interface E1, 75

PCM Parameter Settings

Transmission Interface E1

Network Topology See Site Installation Documentation

Sync Source See Site Installation Documentation

CRC-4 See Site Installation Documentation

Spare bits See Site Installation Documentation

A Short haul

B Short haul

C Short haul

Receiver Sensitivity

D Short haul

17.2 Transmission Interface E1, 120 �

This section describes how to define the PCM parameters for transmissioninterface E1, 120 .

Note: Calculating the total attenuation of the entire RBS chain is onlynecessary if multidrop (in combination with OVPs with bypass relays)is used.

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Table 9 PCM Parameter Settings for Transmission Interface E1, 120


Transmission Interface E1



CRC-4 See Site Installation Documentation

Spare bits See Site Installation Documentation

A

B

C

Receiver Sensitivity

D

See instructions below

The instructions below describe how to calculate the cable attenuation betweenthe Far End and the RBS. The cable attenuation determines whether receiversensitivity is to be set to short or long haul. Use of long haul requires that theequipment at the far end supports long haul.

P008428C

Far End RBS 2 RBS 3RBS 1

A(C) B(D) A(C) B(D) A(C) B(D)

Figure 3 System View for Transmission Interface E1, 120

1. Calculate the cable attenuation between the Far End and the RBSaccording to the following formula:

Cable attenuation = cable length x cable attenuation per metre (or foot).

If multidrop is used then calculate the attenuation of the entire RBS chain,because Receiver Sensitivity A (C) is determined by the total attenuationof the chain from port A (C) to Far End. Receiver Sensitivity B (D) isdetermined by the total attenuation to the last RBS in the chain.

2. If the cable attenuation is less than 6 dB, set the receiver sensitivity toshort haul.

If the cable attenuation is greater than 6 dB, set the receiver sensitivityto long haul.

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Defining PCM

3. Set unused ports to short haul.


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In this example, Far End and the RBS refer tothe figure above.The cable length between the RBS and the Far End is 150 m.The cable attenuation for the cable between the RBS and theFar End is 0.03 dB/m

1. Calculate the cable attenuation between the Far End andthe RBS: 150 m x 0.03 dB/m = 4.5 dB

2. Set Receiver Sensitivity A for the RBS to “Short haul”3. Set Receiver Sensitivity B, C and D for the RBS

to “Short haul" (not connected).

Example 2 Calculating the Receiver Sensitivity Parameters for TransmissionInterface E1, 120

17.3 Transmission Interface T1, 100 �

This section describes how to define parameters for transmission interface T1.When using the cable length for calculations in the following sections, the cableused must be the reference cable (multipair 22 AWG office cable) or similar.

1. Find the transmission interface type in the Site Installation Documentation,and use the table below to find the applicable section with instructionsfor setting the parameters.

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Table 10 Selecting Section for Defining T1, Knowing the TransmissionInterface Type

If the transmission interface type is... then...

DSX-1 go to Section 17.4 on page43, Defining LBO Parametersas Short Haul.

the signal level at the customerinterface and the cableattenuation is known

go to Section 17.5 on page45, Defining LBO Parametersas Long Haul Manually.

only the maximum input signallevel at the far end is known

go to Section 17.6 on page47, Defining LBO Parametersas Long Haul Automatically.

DS1 and...

neither the signal level at thecustomer interface nor thecable attenuation are known

go to Section 17.7 on page50, Defining LBO Parameterswhen TransmissionCharacteristics are Unknown.

2. If there is no information about the transmission interface type in the SiteInstallation Documentation, use the cable length to find the appropriatesection in the table below.

Table 11 Selecting Section for Defining T1, Knowing the Cable Length

If... then...

the cable length is less than 655 feet go to Section 17.4 on page 43,Defining LBO Parameters asShort Haul.

the signal level at the customerinterface and the cableattenuation is known

go to Section 17.5 on page 45,Defining LBO Parameters asLong Haul Manually.

only the maximum input signallevel at the far end is known

go to Defining LBO Parametersas Long Haul AutomaticallySection 17.6 on page 47.

the cablelength ismore than655 feetand...

neither the signal level at thecustomer interface nor thecable attenuation are known

go to Section 17.7 on page 50,Defining LBO Parameters whenTransmission Characteristicsare Unknown.

3. If no information is given in Site Installation Documentation, see the tablebelow.

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Defining PCM

Table 12 Selecting Section for Defining T1, without any Information about theCable Length

If... then...

there is no information about thecable length

go to Section 17.7 on page 50, DefiningLBO Parameters when TransmissionCharacteristics are Unknown.

Note: Calculating the total attenuation of the entire RBS chain is onlynecessary if multidrop (in combination with OVPs with bypass relays)is used.

17.4 Defining LBO Parameters as Short Haul

This section describes how to define the LBO parameters as short haul.

1. On the Configuration menu, click Define and PCM to open the DefinePCM window.



Table 13 PCM parameters Settings for Transmission Interface T1, Short Haul

PCM Parameter Setting

Transmission Interface DS1(T1)



LBO A

LBO B

LBO C

LBO D


FDL Use See Site Installation Documentation

The instructions below describe how to calculate the LBO parameters.

P008645B

CustomerInterfaceDSX-1

RBS 2 RBS 3RBS 1A(C) B(D) A(C) B(D) A(C) B(D)

Figure 4 System View for Transmission Interface T1, Short Haul

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1. Find out the length of the cable between the RBS and the customerinterface (the cross-connection point DSX-1). See figure above.

If multidrop is used, calculate the attenuation of the entire RBS chain,since LBO A (C) is determined by the total attenuation of the chain fromport A (C) to the Customer Interface. LBO B (D) is determined by the totalattenuation to the last RBS in the chain.

If the cable length is not known, set the LBO parameters to ‘‘Short h.,0 – 133 feet’’.

2. Use the cable length and the table below to set the correct LBO parametersin the OMT.

Table 14 Setting LBO Parameters to Short Haul in the OMT

Cable Length LBO Setting

Feet Metres (in the OMT)

0 – 133 0 – 40 Short h., 0 – 133 feet

133 – 266 40 – 81 Short h., 133 – 266 feet

266 – 399 81 – 122 Short h., 266 – 399 feet

399 – 533 122 – 162 Short h., 399 – 533 feet

533 – 655 162 – 200 Short h., 533 – 655 feet

3. Set unused ports to ‘‘Short h., 0 – 133 feet’’.


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In this example, customer interface (DSX-1) and the RBSrefer to the figure above.The cable length between the RBS and the customer interface(DSX-1) is 200 feet (61 m).1. Set LBO A for the RBS to “Short h., 133 – 266 feet”See the table above

2. Set LBO B, C and D for the RBS (not connected)to “Short h., 0 – 133 feet”.

Example 3 Setting LBO Parameters to Short Haul

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Defining PCM

17.5 Defining LBO Parameters as Long Haul Manually

This section describes how to define LBO as long haul, when the signal level atthe customer interface and the cable attenuation is known.

Signal level at the customer interface means either the maximum input signallevel at the Far End, or the carrier-advised code at the network interface. Seefigure below.

P008431B

Customer Interface(Far End/Network

Interface)

RBS

Cable attenuationMaximum inputsignal level/Carrier

advised code

A(C) B(D)

Figure 5 System Parameters for Defining LBO Parameters to Long Haul




Table 15 Manual PCM Parameters Settings for Transmission Interface T1,Long Haul





LBO A

LBO B

LBO C

LBO D



The instructions below describe how to manually set the LBO parameters tolong haul.

1. If the carrier-advised code is given in the Site Installation Documentation,use the table below to set the correct A (B, C, D) LBO parameters.

If multidrop is used, calculate the attenuation of the entire RBS chain, sinceLBO A (C) is determined by the total attenuation of the chain from port A(C) to the Customer Interface.

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Table 16 Long Haul Parameters for Different Carrier-Advised Codes at theNetwork Interface

Long Haul Parameters for Different Values of theCarrier-Advised Code at the Network Interface

CableAttenuation (dB) A (0 dB) B (-7.5 dB) C (-15 dB) D (-22.5 dB)

0 – 7.5 0 -7.5 -15 -22.5

7.5 – 15 N/A 0 -7.5 -15

15 – 22.5 N/A N/A 0 -7.5

> 22.5 N/A N/A N/A 0

2. If the maximum input signal level is given in the Site InstallationDocumentation, use the table below to set the correct LBO A (B, C, D)parameters.

Table 17 Long Haul Parameters for Different Maximum Input Signal Levels

Long Haul Parameters for Different Values of the MaximumInput Signal Level at the Far End

CableAttenuation (dB) 0 dB -7.5 dB -15 dB -22.5 dB

0 – 7.5 0 -7.5 -15 -22.5

7.5 – 15 0 0 -7.5 -15

15 – 22.5 0 0 0 -7.5

> 22.5 0 0 0 0

3. If multidrop, set LBO B (D) to ‘‘Long h., 0 dB’’. Used B (D) ports in multidropconfigurations should always be set to ‘‘Long h., 0 dB’’

4. Set unused ports to ‘‘Short h., 0 – 133 feet’’. Unused ports should alwaysbe set to ‘‘Short h., 0 – 133 feet’’.


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Defining PCM

In this example, network interface and the RBSrefer to the figure above.Carrier-advised code at the network interface is “C” (-15 dB).The cable attenuation is 5 dB.

1. See the table Long haul parameters fordifferent carrier-advised codes at the network interfaceto find the correct LBO parameter for LBO A.2. Set LBO A to “Long h., -15 dB”3. Set LBO B, C and D (not connected) to“Short h., 0 - 133 feet”.

Example 4 Calculating LBO Parameters Manually for Long Haul

17.6 Defining LBO Parameters as Long Haul Automatically

This section describes how to define LBO to long haul when the maximuminput signal level at the Far End is known, but not the cable attenuation. Thecable attenuation can be measured by the RBS according to the instructionsbelow. See figure below.

P008626B

Customer Interface(Far End)

RBS

Measured cable attenuationMaximum inputsignal level

A(C) B(D)

Figure 6 System Parameters for Defining LBO Parameters Automatically toLong Haul


2. Use the table and instructions below to set the parameters.

3. Click OK, when all parameters are set.

Table 18 PCM Parameters Settings for Transmission Interface T1, LongHaul Automatically





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LBO A

LBO B

LBO C

LBO D



The instructions below describe how to automatically set the PCM parameters.

For RBS 1 only:

1. Set LBO A (C) to ‘‘Long h. ALBO, <value of the maximum input signallevel> dB’’.

2. If stand alone, set unused ports to ‘‘Short h., 0 – 133 feet’’. Unused portsare always set to ‘‘Short h., 0 – 133 feet’’.

The RBS automatically sets the correct value in the IDB when the IDBis installed.

Note: The following instructions apply only to multidrop.

If multidrop is used, the line attenuation for RBS 1 must be measured accordingto the instructions below.

For RBS 1:

1. Set LBO B (D) to ‘‘Long h., 0 dB’’. Used B (D) ports in multidrop are alwaysset to ‘‘Long h., 0 dB’’

2. On the RBS 2000 menu, click Connect.

3. On the Configuration menu, click Install IDB.

The RBS will automatically set the correct value in the IDB.

The RBS remains in Local mode after the IDB has been installed.

4. On the Maintenance menu, click Monitor and Lin Att PCM A (C).

5. Click on Start Monitor and read the value of the cable attenuation. Thedisplayed value is given in deci dB (10 deci dB = 1 dB). Make a note of thevalue in the test record, see Verifying Antenna Systems.

When configuring the IDB for RBS 2 and RBS 3, follow the instructions below.

For RBS 2 and RBS 3:

6. Set LBO A (C) on RBS 2 (RBS 3) to ‘‘Long h. ALBO, 0 dB’’.

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Defining PCM

7. On the Configuration menu, click Install IDB.

8. On the Maintenance menu, click Monitor and Lin Att PCM A (C).

9. Click on Start Monitor and read the value of the cable attenuation. Thedisplayed value is given in deci dB (10 deci dB = 1 dB). Make a note ofthe value in the test record.

10. Add the measured cable attenuation values. The value given by Lin AttPCM A is the cable attenuation to the previous RBS in the chain, so themeasured value must be added to the value for the previous RBS(s) toobtain the total cable attenuation for the RBS in question.

11. Use the total cable attenuation value to find the long haul parameter valuefor LBO A (C) in the table below.

Table 19 Long Haul Parameters for Different Maximum Input Signal Levels

Long Haul Parameters for Different Maximum InputSignal Levels at the Far End

Cable Attenuation (dB)

0 dB -7.5 dB -15 dB -22.5 dB

0 – 7.5 0 -7.5 -15 -22.5

7.5 – 15 0 0 -7.5 -15

15 – 22.5 0 0 0 -7.5

> 22.5 0 0 0 0

12. If there is another RBS in the chain, set LBO B (D) to ‘‘Long h., 0 dB’’.Used B ports are always set to ‘‘Long h., 0 dB’’.

If this is the last RBS in the chain, set LBO B (D) to ‘‘Short h., 0 – 133 feet’’.Unused ports are always set to ‘‘Short h., 0 – 133 feet’’.

13. If there is another RBS in the chain, repeat steps 6 to 11.


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In this example, Far End and RBS refer to the figure above.Maximum input signal level at the Far End is -15 dB.The cable attenuation is not known.

1. Set LBO A to “Long h. ALBO, -15 dB”.The cable attenuation is measured by the RBS to 5 dB.

2. The value of LBO A is set automatically by the RBS.3. Set LBO B, C and D (not connected) to“Short h., 0 - 133 feet”.

Example 5 Calculating LBO Parameters Automatically for Long Haul

17.7 Defining LBO Parameters when TransmissionCharacteristics are Unknown

This section describes how to define the LBO parameters if none of theparameters carrier-advised code, maximum input signal at the customerinterface, cable attenuation or cable length are known.


2. Set the parameters. See table below. Click OK when all parameters areset.

Table 20 PCM Parameters Settings for Transmission Interface T1,Transmission Characteristics Unknown





LBO A ‘‘Long h., 0 dB’’

‘‘Long h., 0 dB’’, if usedLBO B

‘‘Short h., 0 – 133 feet’’, if unused

‘‘Long h., 0 dB’’LBO C


‘‘Long h., 0 dB’’, if usedLBO D



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Defining RBS Identity

18 Defining RBS Identity

This section describes how to define the RBS Identity.

Specifying a name and a description for the RBS makes the RBS easier toidentify when for example connecting it by Remote OMT.

1. On the Configuration menu, click Define and RBS Identity to open theDefine RBS Identity window.

2. In the RBS name field, enter the RBS name (preferably a unique namewith a maximum of 20 characters).

3. In the RBS description field, enter information about the site, such as thesite name or the location of the site (maximum of 100 characters).

4. Click OK.

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Defining System Voltage

19 Defining System Voltage

This section describes how to define the system voltage.

In configurations that include batteries, the system voltage is the voltage withwhich the batteries are charged.

In configurations that do not include batteries, but include several RBSs withdifferent power systems, all power systems must have the same system voltagefor optimal operation.

The voltage range set then depends on the configuration. See table below. Ifthe voltage is not set, then the default value is 27.2 V.

Table 21 System Voltage

Configuration with BatteriesParameter Configurationwithout Batteries Fixed Voltage

ChargingTemperature-CompensatingCharging

VoltageRange

24.0 – 28.5 V 25.5 V – 28.5 V 26.7 – 27.7 V

1. On the Configuration menu, click Define and System Voltage.

2. In the Define System Voltage window, select the applicable object andclick Run.

3. Enter the system voltage and click OK.

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Defining TEI

20 Defining TEI

This section describes how to define the TEI value.

To enable the BSC to communicate with the CMRU of an RBS in a cascadechain, a unique TEI value between 12 and 63 needs to be set for each RBS inthe chain. The TEI value for the RBS must also match the TEI value the BSCuses to identify the RBS. For RBSs not connected in a cascade chain, thedefault TEI value can be used.

1. On the Configuration menu, click Define and TEI to open the Define TEIwindow.

2. Select ‘‘DXU 0’’, and click Run.

3. Enter the TEI value, and click OK.

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Defining TNOM

21 Defining TNOM

This section describes how to define the Transport Network Operation andMaintenance (TNOM) parameters, if supported by the network (DXX support).

DXX support enables an O&M centre to monitor the transmission performanceof an RBS. The table below describes the TNOM parameters possible to define.

Note: The timeslot may not be set to a timeslot that is in use by the RBS.

Table 22 TNOM

Parameter Valid Values DefaultValues

Description

TNOM use • On

• Off

Off Activates or deactivatesDXX support in an RBS.

TNOMtimeslot

• E1: 1 – 31

• T1: 1 – 24

E1: 31

T1: 24

Defines the 64 kbpstimeslot on the E1/T1link that is used for DXXsupport of the RBS. Itneeds to be set only ifTNOM use is on.

TNOM nodeID

1 – 65534 1 Defines a uniqueidentifier for a node,such as an RBS in a DXXnetwork. It must onlybe set if TNOM use ison and must be equal tothe value set in the O&Mcentre.

1. On the Configuration menu, click Define and TNOM to open the DefineTNOM Parameters window.

2. Set TNOM Use to ‘‘On’’.

3. In the TNOM Timeslot box, enter the value. Valid TNOM time slot valuesare shown in the table above.

4. In the TNOM Node ID box, enter the correct values. Valid TNOM Node IDvalues are found in the table above. Click OK when finished.

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22 Defining VSWR Limits

This section describes how to define VSWR limits for configuring thesupervision of the antenna system.

Note: This section does not apply to RBS 2116 or RBS 2216.

Preconditions

Before defining the VSWR limits, ensure the following:

• The test results from the SWR tests are available

• There are no faults in the antenna system. For information on how to testthe antenna system, see the document Verifying Antenna Systems.

Note: If VSWR alarms are received and no faults are found in the antennasystem, the IDB needs to be updated with increased VSWR alarmlimits.

Defining Recommended VSWR Limits

Parameters for VSWR limits are set to adjust the detection of problems with theantenna system for the specific site.

Note: Examples when limits need to be defined for VSWR class 1 and 2 canbe short feeder, diplexer and TMA use (typically needs higher VSWRlimits).

The table below describes the parameters available for the VSWR limits thatcould be defined.

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Table 23 VSWR Limits


VSWR supervision

• Default

• User defined

Default This parameter specifies if the limits forVSWR class 1 and VSWR class 2 faultsare set to default values or if the usercan define them.

• Default: High default values (2.8)are used for both VSWR class 1and VSWR class 2 parameters. TheVSWR class 1 and VSWR class 2parameter values cannot be changed.This is the predefined setting for TMAconfigurations. The supervision detectsonly major faults.

• User-defined: Values for the VSWRclass 1 and VSWR class 2 parameterscan be entered manually. This isthe predefined setting for non-TMAconfigurations. In such cases,predefined values for VSWR class 1and VSWR class 2 parameters areprovided.

VSWR class 1 See Table 24 onpage 61

2.8 The parameter is used to select thethreshold for VSWR class 1 faults

VSWR class 2 See Table 24 onpage 61

2.8 The parameter is used to select thethreshold for VSWR class 2 faults

1. Select the recommended VSWR limit from the table below bycross-checking the measured VSWR value with the recommended VSWRalarm limit.

For measured VSWR value (in the test record from Verifying AntennaSystems) and recommended VSWR alarm limit, see Site InstallationDocumentation.

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Table 24 Recommended VSWR Limits for Different Initial VSWR Values

Recommended VSWR Limit

Class 2 Limit Class2 Limit

Class1 Limit

Measured VSWRValue

≤ 1.5 %(1) ≤ 0.2 %(1) ≤ 0.01 %(1)

1.00 – 1.30 1.6 1.7 2.2

1.31 – 1.37 1.7 1.8 2.2

1.38 – 1.43 1.8 2.0 2.2

1.44 – 1.55 2.0 2.2 2.5

1.56 – 1.66 2.2 2.5 2.8

≥ 1.67 Not recommended

(1) False alarm probability

2. In the Configuration menu, select Define and VSWR Limits.

3. In the Define VSWR Limits window, select the applicable object from thelist and click Run.

4. In the Define VSWR Limits dialogue box, set the VSWR Class 1 andClass 2 values according to the table above and click OK.

5. Repeat steps 3 to 4 for each applicable antenna object.


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Saving IDB

23 Saving IDB

In case it is necessary to reinstall the IDB, the IDB parameters must be savedon the PC.

• On the Configuration menu, click Save IDB.

• Give the IDB file an RBS-specific name, and save the IDB on the PC.

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Installing IDB

24 Installing IDB

This section describes how to install the IDB in the RBS by connecting theOMT to the DXU.

Note: If the flash card has to be removed when installing the IDB, see thedocument RBS SW Update.

Note: Using the OMT, always reload the software and install the appropriateIDB after moving a used flash card to another cabinet. This ensuresconsistent software and correct configuration.

Note: The RBS must be in local mode to accept a new or modified IDB.

1. If the RBS is inremote mode, changethe setting to localmode by pressing theLocal/remote buttonon the DXU. The Localindicator will start toflash.

P012062A

DXU reset

Local

Local/remote

2. Wait until the Local indicator has a constant yellow light, indicatingthat the RBS is now in local mode.

3. Physically connect the OMT to the RBS if not already connected.See Section 4 on page 9 .

4. On the RBS 2000 menu, click Connect to logically connect the OMTto the RBS.

5. On the Configuration menu, click Install IDB. The RBS remains inlocal mode after the IDB has been installed.

Note: Do not touch the RBS when any indicators are double-flashing. SeeOptical Indicators and Switches.

6. On the Configuration menu, click Site Specific Data and Displayto open the site_specific_data.txt - window. Check that the correctparameters have been defined.

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setting idb parameters

Engineering