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 written
permission of the copyright owner.
The contents of this document are subject to revision without notice due to
continued progress in methodology, design and manufacturing. Ericsson shall
have no liability for any error or damage of any kind resulting from the use
of this document.
2/1543-LZA 701 0001 Uen H 2007-05-01
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 Transmission
Characteristics 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 TG
synchronization 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 to
define 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 included
as on-line help.
The IDB parameters can be loaded to the RBS in two ways:
1.1
•
By connecting the OMT to the DXU and installing the IDB
•
By inserting a flash card with the new IDB into the DXU
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 Site
Installation Documentation.
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1
Setting IDB Parameters, R10 to R12, 06A, 06B
Start
Connecting the OMT
Creating IDB
Reading IDB
Opening IDB from File
Defining Present RUs
Defining Alarm Inlets
(External Alarms)
Defining ALNA/TMA
Parameters
Defining Loss and Checking
the Total Gain Value
Defining Battery Backup
Time Test Parameters
Defining Battery
Parameters
Defining Climate
Defining Delay
A
P014549C
Figure 1
2
Work Process for Setting the IDB Parameters (Part 1 of 2)
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Introduction
A
Defining GPS Parameters
Defining Hardware
Information
Defining PCM
Defining RBS Identity
Defining System Voltage
Defining TEI
Defining TNOM
Defining VSWR Limits
Saving IDB
Installing IDB
P014550D
Figure 2
1.2
Work Process for Setting the IDB Parameters (Part 2 of 2)
Revision Information
Rev. H
•
VSWR section updated with note that this does not apply to RBS 2116
or RBS 2216
•
Word "SID” changed to Site Installation Documentation
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Setting IDB Parameters, R10 to R12, 06A, 06B
4
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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 is
used, 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 RBS
and its software. Contact your Ericsson market unit representative for more
information.
Documentation
The following documents are referenced in this document, ensure that they
are 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 TG
synchronization is used.
•
GPS Synchronization in RBS *, RBS specific document. Only if GPS
parameters shall be set.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 the
document RBS SW Update.
Defining Transmission Interface
1. Start the OMT.
2. On the RBS 2000 menu, click Disconnect to logically disconnect the
OMT from the RBS.
3. On the Configuration menu, click Create IDB to open the Create IDB
window.
4. Select transmission interface.
Defining Cabinet Setup
5. To add cabinets to the Cabinet Setup box, click New to open the Define
Setup 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 to
open the Antenna Systems for Sector window.
11. In the Antenna Systems for Sector window, click New to open the Define
Antenna 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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Setting IDB Parameters, R10 to R12, 06A, 06B
BTS R10 or R11 software, and RBS
not equipped with dTRU:
Yes if TMAs without external power
have been installed.
No if externally-powered TMAs have
been installed
BTS R10 software and RBS
equipped with dTRU:
Yes if TMAs have been installed.
BTS R12, 06A or 06B software:
Yes if TMAs have been installed.
No if TMAs have not 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 (if
applicable).
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 repeat
the steps above.
21. In the Antenna Systems for Sector window, verify that the correct
parameters 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 previous
configuration?’’, 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 IDB
data 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 the
DXU.
2. Start the OMT.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 the
IDB 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 the
Display 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 3
on page 7.
If the IDB parameters above are correct, set the applicable site-specific
IDB parameters from the list below. Follow the procedures defined in the
following sub-sections:
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Setting IDB Parameters, R10 to R12, 06A, 06B
• 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 OMT
logically from the RBS.
12
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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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Setting IDB Parameters, R10 to R12, 06A, 06B
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Defining Present RUs
7
Defining Present RUs
This section describes how to check and, if necessary, define the RUs which
are present (or not present) in the RBS.
To avoid Hardware and IDB inconsistency, the RBS must know which RUs
should be present.
By setting RUs to Present/Not present, the RBS recognizes which RUs can be
used (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 is
detected:
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 click
Disconnect on the RBS 2000 menu.
2. On the Configuration menu, click Define and Present RUs to open the
Define Present RUs window.
3. If necessary, move the RUs in the configuration used to the Present box by
selecting the RU to be moved and clicking the ← key (or double-clicking
the RUs to be moved).
If RUs Not Present in the configuration are in the Present box, then move
them to the Not Present box by clicking the → key.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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 interface
of the RBS, several parameters need to be set.
For an overview of the available parameter settings for external alarms, see
table below.
Table 2
External Alarm Settings
Parameter
Valid Values
Default
Description
Type
• Closing
Closing
Specifies how an external
device indicates an alarm
and must be set to enable
correct supervision. A fault
is indicated by closing or
breaking the sensor loop.
0
Uniquely identifies the external
alarm equipment. The value is
sent in external alarm reports
to the O&M centre.
Level 1
Indicates the severity of the
external alarm. The operator
determines the values to be
used for the alarms.
An empty
character
string
The operator can add a
description of the external
alarm. The value is sent to the
O&M centre in external alarm
reports.
• Breaking
• 0–9
ID
• A–F
Severity
• Level 1
• Level 2
Comment
Character
string with
up to 62
characters.
Valid character
s are: 0..9 A..Z
space ! # $ %
&’()*+,-. /:
;<=>? _
Note:
Some DC/DC converters are factory-installed to alarm input 16 in the
external alarm unit. Input 16 is therefore unavailable in such cases.
Note:
If a smoke detector is factory-installed it is hard-coded to alarm input
2 and 3 in the external alarm unit. Inputs 2 and 3 are therefore
unavailable in such cases.
1. On the Configuration menu, click Define and Alarm Inlets to open the
Define Alarm Inlets window.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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 an
alarm, the alarm cable closes) or ‘‘Breaking’’ (when there is an alarm, the
alarm 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, see
document RBS Product Description. The alarm output of the DC/DC converter
is connected to the alarm inlets. Define the DC/DC converter as an external
alarm 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 detector
is connected to the alarm inlets. Define the smoke detector alarms as external
alarms with the following parameters:
18
Alarm Inlet
0/2
Inlet Usage
External Alarm
Type
Breaking
ID
1
Severity
1
Comment
FIRE
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Defining Alarm Inputs (External Alarms)
Alarm Inlet
0/3
Inlet Usage
External Alarm
Type
Breaking
ID
2
Severity
2
Comment
SMOKE DETECTOR FAILURE
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 the
characteristics of the TMA are different from the default values in the IDB files
in 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 click
Run.
3. Set the parameters listed below. See the installation instructions for the
TMA.
Table 3
ALNA/TMA Parameters
Parameter
Valid Values
Default
Description
TMA type
• GSM
• GSM 800/900/
1800/1900
(Ericsson
standard GSM
TMA)
Determines the TMA type, how the TMA
is to be supervised, how faults are to
be reported, and whether the TMA has
bypass functionality. This parameter
must be changed when a TMA type
other than the GSM (Ericsson standard
GSM TMA) or compatible TMA is used.
Available TMA types also depend on the
configuration
• TDMA
• GSM bypass
• TDMA bypass
• Externally
powered
TX group
delay
0 – 1, 000 ns
22 ns
Specifies the TX signal delay in the TMA.
TMA TX group delay is part of the total TX
path delay in the RBS, which is needed
to synchronize the TX burst transmission
of all TRXs. If the default value differs
from the value in the TMA equipment
specification, then it must be updated.
RX group
delay
0 – 1, 000 ns
101 ns
TMA RX group delay is part of the
total RX path delay in the RBS which
is needed to calibrate the timing in the
TRX receiver. If the default value differs
from the value in the TMA equipment
specification, then it must be updated.
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Setting IDB Parameters, R10 to R12, 06A, 06B
Table 3
ALNA/TMA Parameters
Parameter
Loss
(1)
Valid Values
Default
Description
24 dB – +24
dB
GSM 800/900/
1800: 12 dB
The TMA loss is part of the total RX
path loss in the RBS, which is needed to
calibrate the TRX and thereby optimize
the RF performance of the RBS. If the
TMA loss parameter differs from the
default values it must be updated.
GSM 1900:
10.934 dB
RX frequency
range (MHz)
824.2 – 848.8 MHz (GSM 800)
880.2 – 914.8 MHz (GSM 900)
Specifies the supported RX frequency
range for the TMA.
1710.2 – 1784.8 MHz (GSM 1800)
1850.2 – 1909.8 MHz (GSM
(2)
1900)
Current
supervision
limits
0 – 500 mA
GSM 800/900:
33 mA (low)
237 mA (high)
GSM
1800/1900:
33 mA (low)
Specifies the limits of TMA current
supervision. One type of fault is set if the
supply current to the TMA is constantly
above the high limit or below the low
limit. Another type of fault is set if the
TMA repeatedly alters the supply current
to above or below the high limit. The
parameters must be updated if the
current supervision limits for the TMA
differ from the default values.
150 mA (high)
(1) TMA loss = 0TMA gain
(2) Valid values = default values
Note:
If externally powered TMAs have been configured, then the current
supervision 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 Gain
Value
This section describes how to define the loss of the RX feeders and to check
that the total gain value is within limits.
Defining Loss
To sustain uplink RX sensitivity and optimize the RF performance of the RBS, it
is essential to define the correct value for the loss parameter. That includes
losses from jumper cables, combiners, splitters and RF filters of an RX feeder
chain with attached TMA.
For a TMA configuration, this means that if the feeder loss value, measured
and calculated in the document Verifying Antenna Systems, differs from the
default loss value of 3.996 dB, then the loss parameter must be updated to the
feeder loss value. See test record from Verifying Antenna Systems.
For non-TMA configurations, the loss parameter is kept to the default value of 0
dB. The default value may be kept in this case, because the feeder loss is not
part 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 Define
Loss window.
2. Select the appropriate RX feeder (for example FEED_TXA_RXA 0), and
click Run.
3. In the Define Loss window, enter the Total Feeder Attenuation from the test
record 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 within
system 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 table
below.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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, and
that the GSM specification is met.
The following example illustrates what is said above.
Preconditions: GSM 1800/1900 CDU-G
TMA Gain = 12 dB
Total Feeder Attenuation = 4 dB
Total Gain = TMA Gain - Total Feeder Attenuation =
= 12 – 4 = 8 dB
Result: 7 ≤ 8 ≤ 12
Example 1
24
Checking that the Total Gain Value is Within Limits
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Defining Battery Backup Time Test Parameters
11
Defining Battery Backup Time Test
Parameters
This section describes how to define the test parameters for the battery backup
time 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 can
be read by site personnel using the OMT.
If enabled, the test forces the RBS run on battery backup until it reaches a
system 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 expected
backup time defined for the batteries.
The test is considered successful if the measured backup time exceeds the
expected backup time.
Table 5
Battery Backup Time Test Parameters
Parameter
Valid Values
Default
Description
Enable test
• Yes (enabled) No (disabled) Enables the battery backup time test.
• No (disabled)
Start date
YY-MM-DD
YY-MM-DD
The battery backup time test is a cyclic
function and it is therefore necessary to state
a start date for the test.
Start time
00:00 – 23:59
00:00
(hh:mm)
(hh:mm)
Defines the time of day when the battery
backup time test is performed.
Voltage level 22.5 – 23.5 V
to stop the
test
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23.0 V
Defines the voltage level that stops the test.
The test must be stopped before the batteries
are fully discharged. A low level means a
longer test period, which gives a more reliable
test result. However, the batteries will be more
discharged, so more time must elapse before
a mains failure can be handled. A high level
results in a greater difference between the
measured backup time and the true backup
time. The disconnect level main parameter
defines the true backup time, and the voltage
level that stops the test must be at least 0.3 V
higher than the disconnect level.
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Setting IDB Parameters, R10 to R12, 06A, 06B
Table 5
Battery Backup Time Test Parameters
Parameter
Valid Values
Default
Description
Test interval
60 – 365 days
182 days
Defines the number of days between the
battery backup time test. The battery can
wear out prematurely if the test is done too
frequently. Also note that repeating a test with
different load profiles gives a more accurate
test result.
Expected
backup time
00:00 – 23:59
00:00
(hh:mm)
(hh:mm)
The expected backup time is compared with
the measured backup time. If it is longer than
the measured time, then the test is passed.
The RBS does not know how much backup
time to expect. To find out whether the backup
time is long enough it is necessary to enter
the expected backup time, which is the same
as the backup time planned for the site. Note
that the default value is 00:00 (no backup
time), which means that the test will always
be successful.
1. On the Configuration menu, click Define and Battery Backup Time Test
Parameters to open the Define Battery Backup Time Test Parameters
window.
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.
7. Click OK when finished.
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Defining Battery Parameters
12
Defining Battery Parameters
This section describes how to define the battery parameters.
The settings of the battery parameters define the performance of the batteries
and their lifetime. The setting of the Alarm Raise limit defines the operating
temperatures of the batteries. This parameter must not be changed for Ericsson
batteries supplied with the RBS.
System voltage (define using the Define System Voltage function) must be
adapted to the chosen charging algorithm. This is particularly important when
using fixed float charging voltages.
1. On the Configuration menu, click Define and Battery Parameters to open
the 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
Disconnect
level prioritized
20.0 – 23.8 V
20.8 V
Defines the level at which the batteries
are disconnected. Prioritized supply is
(1)
intended for TM equipment . This is the
low voltage disconnect function, which is
designed to protect the battery from being
overdischarged.
Disconnect
level main
20.2 – 24.0 V
21.0 V
Sets the voltage at which the RBS is
disconnected from the batteries and
indicates how long the battery backup
(2)
time will be.
Reconnect
level
24.0 – 26.0 V
25.5 V
Defines the system voltage at which
prioritized supply and batteries are to be
reconnected.
Alarm raise
limit
55 – 60C
55C
Defines the temperature at which a high
temperature alarm is raised. Batteries
are disconnected when the temperature
reaches 5 above the alarm raise limit, and
are reconnected when the temperature
drops 5 below the alarm raise limit.
In service date
YYYY-MM-DD
YYYY-MM-DD
Used by the battery log function and when
set indicates that new batteries have been
installed.
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Setting IDB Parameters, R10 to R12, 06A, 06B
Table 6
Battery Parameters
Parameter
Valid values
Charging mode
Default
Description
Temperature-c
ompensated
Defines the type of charging algorithm to
use. The battery type and configuration
affect the parameter setting.
Temperaturecompensated
Temperature-compensated charging is
recommended for lead–acid batteries. It
uses high float-charging voltages at low
battery temperature and low float-charging
voltages at high temperatures. It can be
used when using shared batteries if the
battery temperature sensors are located
in the same measuring positions.
Fixed voltage
Fixed voltage, also called fixed
float-charging voltage, is recommended
when using non-lead batteries or shared
batteries
Temperaturecompensated
+ Boost event
See the description of temperaturecompensated above. Boost charging is
used to obtain optimal charging since low
charging could reduce battery life. Boost
event is initiated when the battery voltage
drops below 22.5 V.
Temperaturecompensated,
no Boost time
The only difference between boost event
and boost time is the start time. Boost
time is initiated at midnight when the start
date occurs and then at regular intervals.
Temperaturecompensated
+ Boost
event/time
Boost event/time is initiated both when the
battery voltage drops below 22.5 V and at
midnight when the start date occurs and
then at regular intervals. See descriptions
of boost time and boost event above.
Perform first
boost charging
YYYY-MM-DD
YYYY-MM-DD
The parameter defines the first time that
boost time charging is initiated.
Days between
boost charging
30 – 365 days
175 days
The parameter defines the time interval
where charging is conducted, when boost
time is selected as the charging mode.
Boost charge
time, boot time
1 – 24 h
6h
The parameter defines the duration of
the charging when boost time charging
is used.
Boost charge
time, boost
event
1 – 24 h
6h
The parameter defines the duration of
charging when boost event charging is
used.
(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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Defining Battery Parameters
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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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 Define
Climate window.
2. Select the appropriate climate name.
3. Click OK when finished.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 feeder
delay value, measured and calculated in the document Verifying Antenna
Systems, differs from the default delay (configuration dependent). Then the
delay 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 TG
Synchronization Parameters.
1. On the Configuration menu, click Define and Delay to open the Define
Delay 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.
5. Click Close when finished.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 equipped
with a GPS receiver.
A GPS receiver is used to achieve a synchronized radio network and works as
reference for RF frequency generation and GSM time-based counters.
Parameters for the GPS are set according to the table below.
Table 7
GPS Parameters
Parameter
Valid Values
Default
Description
GPS present
• Yes
No
The parameter is automatically changed
to Yes when GPS receiver hardware is
added. If the GPS receiver is removed, the
parameter must be manually set to No.
• No
GPS RX delay
0 – 65535 ns
0 ns
The parameter defines the delays in the
GPS receiver, antenna, and cables and
is important in achieving a synchronized
network.
GPS RX DXU
0 – 65535 ns
0 ns
The parameter defines the delays from the
GPS receiver to the DXU, including delays
in the OVP unit and is important in achieving
a synchronized network.
Note:
If the GPS receiver is used only as a reference for RF frequency
generation, then it is not necessary to set the GPS RX delay and GPS
RX DXU parameters.
For more information on GPS Installation, see the document GPS
Synchronization in RBS *
1. On the Configuration menu, click Define and GPS Parameters to open
the 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, GPS
feeder cables and the GPS receiver.
4. Enter the GPS RX DXU delay, that is, the delay from the receiver to the
DXU, including the delay in the OVPs.
5. Click OK when finished.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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Defining Hardware Information
16
Defining Hardware Information
This section describes how to define hardware information for hardware
units 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 functions
Display Inventory List and Display Information, or at the O&M centre.
1. On the Configuration menu, click Define and Hardware Info to open
the 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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Setting IDB Parameters, R10 to R12, 06A, 06B
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Defining PCM
17
Defining PCM
This section describes how to define the PCM paramaters for transmission.
17.1
, see: Section 17.1 on page 39
•
For transmission interface E1, 75
•
For transmission interface E1, 120
see Section 17.2 on page 39
•
For transmission interface T1, 100
see Section 17.3 on page 41
Transmission Interface E1, 75
This section describes how to define the PCM parameters for transmission
interface E1, 75 .
1. On the Configuration menu, click Define and PCM.
2. Set the parameters according to the table and instructions below.
3. Click OK when all parameters are set.
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
Receiver Sensitivity
17.2
A
Short haul
B
Short haul
C
Short haul
D
Short haul
Transmission Interface E1, 120
This section describes how to define the PCM parameters for transmission
interface E1, 120 .
Note:
Calculating the total attenuation of the entire RBS chain is only
necessary if multidrop (in combination with OVPs with bypass relays)
is used.
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Setting IDB Parameters, R10 to R12, 06A, 06B
1. On the Configuration menu, click Define and PCM.
2. Set the parameters according to the table and instructions below.
3. Click OK when all parameters are set.
Table 9
PCM Parameter Settings for Transmission Interface E1, 120
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
Receiver Sensitivity
A
See instructions below
B
C
D
The instructions below describe how to calculate the cable attenuation between
the Far End and the RBS. The cable attenuation determines whether receiver
sensitivity is to be set to short or long haul. Use of long haul requires that the
equipment at the far end supports long haul.
Far End
RBS 1
A(C) B(D)
RBS 2
A(C) B(D)
RBS 3
A(C) B(D)
P008428C
Figure 3
System View for Transmission Interface E1, 120
1. Calculate the cable attenuation between the Far End and the RBS
according 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 attenuation
of the chain from port A (C) to Far End. Receiver Sensitivity B (D) is
determined 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 to
short haul.
If the cable attenuation is greater than 6 dB, set the receiver sensitivity
to long haul.
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Defining PCM
3. Set unused ports to short haul.
The following example illustrates what is said above.
RBS 1
Far End
A C B D
150m
0,03 dB/m
P010439A
In this example, Far End and the RBS refer to
the 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 the
Far End is 0.03 dB/m
1. Calculate the cable attenuation between the Far End and
the 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
17.3
Calculating the Receiver Sensitivity Parameters for Transmission
Interface E1, 120
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 cable
used 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 instructions
for setting the parameters.
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Setting IDB Parameters, R10 to R12, 06A, 06B
Table 10
Selecting Section for Defining T1, Knowing the Transmission
Interface Type
If the transmission interface type is...
then...
DSX-1
go to Section 17.4 on page
43, Defining LBO Parameters
as Short Haul.
DS1 and...
the signal level at the customer
interface and the cable
attenuation is known
go to Section 17.5 on page
45, Defining LBO Parameters
as Long Haul Manually.
only the maximum input signal
level at the far end is known
go to Section 17.6 on page
47, Defining LBO Parameters
as Long Haul Automatically.
neither the signal level at the
customer interface nor the
cable attenuation are known
go to Section 17.7 on page
50, Defining LBO Parameters
when Transmission
Characteristics are Unknown.
2. If there is no information about the transmission interface type in the Site
Installation Documentation, use the cable length to find the appropriate
section 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 as
Short Haul.
the cable
length is
more than
655 feet
and...
the signal level at the customer go to Section 17.5 on page 45,
interface and the cable
Defining LBO Parameters as
attenuation is known
Long Haul Manually.
only the maximum input signal go to Defining LBO Parameters
level at the far end is known
as Long Haul Automatically
Section 17.6 on page 47.
neither the signal level at the
customer interface nor the
cable attenuation are known
go to Section 17.7 on page 50,
Defining LBO Parameters when
Transmission Characteristics
are Unknown.
3. If no information is given in Site Installation Documentation, see the table
below.
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Defining PCM
Table 12
If...
then...
there is no information about the
cable length
go to Section 17.7 on page 50, Defining
LBO Parameters when Transmission
Characteristics are Unknown.
Note:
17.4
Selecting Section for Defining T1, without any Information about the
Cable Length
Calculating the total attenuation of the entire RBS chain is only
necessary if multidrop (in combination with OVPs with bypass relays)
is used.
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 Define
PCM window.
2. Set the parameters according to the table and instructions below.
3. Click OK when all parameters are set.
Table 13
PCM parameters Settings for Transmission Interface T1, Short Haul
PCM Parameter
Setting
Transmission Interface
DS1(T1)
Network Topology
See Site Installation Documentation
Sync Source
See Site Installation Documentation
LBO A
See instructions below
LBO B
LBO C
LBO D
FDL Use
See Site Installation Documentation
The instructions below describe how to calculate the LBO parameters.
Customer
Interface
DSX-1
RBS 1
A(C) B(D)
RBS 2
A(C) B(D)
RBS 3
A(C) B(D)
P008645B
Figure 4
System View for Transmission Interface T1, Short Haul
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Setting IDB Parameters, R10 to R12, 06A, 06B
1. Find out the length of the cable between the RBS and the customer
interface (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 from
port A (C) to the Customer Interface. LBO B (D) is determined by the total
attenuation 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 parameters
in the OMT.
Table 14
Setting LBO Parameters to Short Haul in the OMT
Cable Length
Feet
LBO Setting
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’’.
The following example illustrates what is said above.
RBS 1
Customer
Interface
(DSX-1)
A C B D
200 feet
(61 metres)
P010440A
In this example, customer interface (DSX-1) and the RBS
refer 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
44
Setting LBO Parameters to Short Haul
2/1543-LZA 701 0001 Uen H 2007-05-01
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 at
the customer interface and the cable attenuation is known.
Signal level at the customer interface means either the maximum input signal
level at the Far End, or the carrier-advised code at the network interface. See
figure below.
RBS
Customer Interface
(Far End/Network
Interface)
Maximum input
signal level/Carrier
advised code
A(C) B(D)
Cable attenuation
P008431B
Figure 5
System Parameters for Defining LBO Parameters to Long Haul
1. On the Configuration menu, click Define and PCM.
2. Set the parameters according to the table and instructions below.
3. Click OK when all parameters are set.
Table 15
Manual PCM Parameters Settings for Transmission Interface T1,
Long Haul
PCM Parameter
Settings
Transmission Interface
DS1(T1)
Network Topology
See Site Installation Documentation
Sync Source
See Site Installation Documentation
LBO A
See instructions below
LBO B
LBO C
LBO D
FDL Use
See Site Installation Documentation
The instructions below describe how to manually set the LBO parameters to
long 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, since
LBO A (C) is determined by the total attenuation of the chain from port A
(C) to the Customer Interface.
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Setting IDB Parameters, R10 to R12, 06A, 06B
Table 16
Long Haul Parameters for Different Carrier-Advised Codes at the
Network Interface
Cable
Attenuati
on (dB)
Long Haul Parameters for Different Values of the
Carrier-Advised Code at the Network Interface
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
N/A
N/A
N/A
0
> 22.5
2. If the maximum input signal level is given in the Site Installation
Documentation, 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
Cable
Attenuati
on (dB)
Long Haul Parameters for Different Values of the Maximum
Input Signal Level at the Far End
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
0
0
0
0
> 22.5
3. If multidrop, set LBO B (D) to ‘‘Long h., 0 dB’’. Used B (D) ports in multidrop
configurations should always be set to ‘‘Long h., 0 dB’’
4. Set unused ports to ‘‘Short h., 0 – 133 feet’’. Unused ports should always
be set to ‘‘Short h., 0 – 133 feet’’.
The following example illustrates what is said above.
RBS 1
Network
Interface
A C B D
Cable
Carrier Advised Attenuation = 5 dB
Code= -15 dB
P010441A
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Defining PCM
In this example, network interface and the RBS
refer 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 for
different carrier-advised codes at the network interface
to 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
17.6
Calculating LBO Parameters Manually for Long Haul
Defining LBO Parameters as Long Haul Automatically
This section describes how to define LBO to long haul when the maximum
input signal level at the Far End is known, but not the cable attenuation. The
cable attenuation can be measured by the RBS according to the instructions
below. See figure below.
RBS
Customer Interface
(Far End)
Maximum input
signal level
A(C) B(D)
Measured cable attenuation
P008626B
Figure 6
System Parameters for Defining LBO Parameters Automatically to
Long Haul
1. On the Configuration menu, click Define and PCM.
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, Long
Haul Automatically
PCM Parameter
Setting
Transmission Interface
DS1(T1)
Network Topology
See Site Installation Documentation
Sync Source
See Site Installation Documentation
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Setting IDB Parameters, R10 to R12, 06A, 06B
PCM Parameter
Setting
LBO A
See instructions below
LBO B
LBO C
LBO D
FDL Use
See Site Installation Documentation
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 signal
level> dB’’.
2. If stand alone, set unused ports to ‘‘Short h., 0 – 133 feet’’. Unused ports
are always set to ‘‘Short h., 0 – 133 feet’’.
The RBS automatically sets the correct value in the IDB when the IDB
is installed.
Note:
The following instructions apply only to multidrop.
If multidrop is used, the line attenuation for RBS 1 must be measured according
to the instructions below.
For RBS 1:
1. Set LBO B (D) to ‘‘Long h., 0 dB’’. Used B (D) ports in multidrop are always
set 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. The
displayed value is given in deci dB (10 deci dB = 1 dB). Make a note of the
value 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. The
displayed value is given in deci dB (10 deci dB = 1 dB). Make a note of
the value in the test record.
10. Add the measured cable attenuation values. The value given by Lin Att
PCM A is the cable attenuation to the previous RBS in the chain, so the
measured value must be added to the value for the previous RBS(s) to
obtain the total cable attenuation for the RBS in question.
11. Use the total cable attenuation value to find the long haul parameter value
for LBO A (C) in the table below.
Table 19
Long Haul Parameters for Different Maximum Input Signal Levels
Cable Attenua
tion (dB)
Long Haul Parameters for Different Maximum Input
Signal Levels at the Far End
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.
The following example illustrates what is said above.
RBS 1
Far End
A C B D
Maximum
input signal
level= -15 dB
Measured cable
attenuation = 5 dB
P010442A
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Setting IDB Parameters, R10 to R12, 06A, 06B
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
17.7
Calculating LBO Parameters Automatically for Long Haul
Defining LBO Parameters when Transmission
Characteristics are Unknown
This section describes how to define the LBO parameters if none of the
parameters carrier-advised code, maximum input signal at the customer
interface, cable attenuation or cable length are known.
1. On the Configuration menu, click Define and PCM.
2. Set the parameters. See table below. Click OK when all parameters are
set.
Table 20
PCM Parameters Settings for Transmission Interface T1,
Transmission Characteristics Unknown
PCM Parameter
Settings
Transmission Interface
DS1(T1)
Network Topology
See Site Installation Documentation
Sync Source
See Site Installation Documentation
LBO A
‘‘Long h., 0 dB’’
LBO B
‘‘Long h., 0 dB’’, if used
‘‘Short h., 0 – 133 feet’’, if unused
LBO C
‘‘Long h., 0 dB’’
‘‘Short h., 0 – 133 feet’’, if unused
LBO D
‘‘Long h., 0 dB’’, if used
‘‘Short h., 0 – 133 feet’’, if unused
FDL Use
50
See Site Installation Documentation
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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 to
identify when for example connecting it by Remote OMT.
1. On the Configuration menu, click Define and RBS Identity to open the
Define RBS Identity window.
2. In the RBS name field, enter the RBS name (preferably a unique name
with a maximum of 20 characters).
3. In the RBS description field, enter information about the site, such as the
site name or the location of the site (maximum of 100 characters).
4. Click OK.
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Setting IDB Parameters, R10 to R12, 06A, 06B
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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 with
which the batteries are charged.
In configurations that do not include batteries, but include several RBSs with
different power systems, all power systems must have the same system voltage
for optimal operation.
The voltage range set then depends on the configuration. See table below. If
the voltage is not set, then the default value is 27.2 V.
Table 21
System Voltage
Parameter
Voltage
Range
Configuration
without Batteries
24.0 – 28.5 V
Configuration with Batteries
Fixed Voltage
Charging
TemperatureCompensating
Charging
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 and
click 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 cascade
chain, a unique TEI value between 12 and 63 needs to be set for each RBS in
the chain. The TEI value for the RBS must also match the TEI value the BSC
uses to identify the RBS. For RBSs not connected in a cascade chain, the
default TEI value can be used.
1. On the Configuration menu, click Define and TEI to open the Define TEI
window.
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 and
Maintenance (TNOM) parameters, if supported by the network (DXX support).
DXX support enables an O&M centre to monitor the transmission performance
of 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
Default
Values
Description
TNOM use
• On
Off
Activates or deactivates
DXX support in an RBS.
Defines the 64 kbps
timeslot on the E1/T1
link that is used for DXX
support of the RBS. It
needs to be set only if
TNOM use is on.
• Off
TNOM
timeslot
• E1: 1 – 31
E1: 31
• T1: 1 – 24
T1: 24
TNOM node
ID
1 – 65534
1
Defines a unique
identifier for a node,
such as an RBS in a DXX
network. It must only
be set if TNOM use is
on and must be equal to
the value set in the O&M
centre.
1. On the Configuration menu, click Define and TNOM to open the Define
TNOM Parameters window.
2. Set TNOM Use to ‘‘On’’.
3. In the TNOM Timeslot box, enter the value. Valid TNOM time slot values
are shown in the table above.
4. In the TNOM Node ID box, enter the correct values. Valid TNOM Node ID
values are found in the table above. Click OK when finished.
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Defining VSWR Limits
22
Defining VSWR Limits
This section describes how to define VSWR limits for configuring the
supervision 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 test
the antenna system, see the document Verifying Antenna Systems.
Note:
If VSWR alarms are received and no faults are found in the antenna
system, the IDB needs to be updated with increased VSWR alarm
limits.
Defining Recommended VSWR Limits
Parameters for VSWR limits are set to adjust the detection of problems with the
antenna system for the specific site.
Note:
Examples when limits need to be defined for VSWR class 1 and 2 can
be short feeder, diplexer and TMA use (typically needs higher VSWR
limits).
The table below describes the parameters available for the VSWR limits that
could be defined.
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Table 23
VSWR Limits
Parameter
Valid Values
Default
Description
VSWR supervisio
n
• Default
Default
This parameter specifies if the limits for
VSWR class 1 and VSWR class 2 faults
are set to default values or if the user
can define them.
• User defined
• Default: High default values (2.8)
are used for both VSWR class 1
and VSWR class 2 parameters. The
VSWR class 1 and VSWR class 2
parameter values cannot be changed.
This is the predefined setting for TMA
configurations. The supervision detects
only major faults.
• User-defined: Values for the VSWR
class 1 and VSWR class 2 parameters
can be entered manually. This is
the predefined setting for non-TMA
configurations. In such cases,
predefined values for VSWR class 1
and VSWR class 2 parameters are
provided.
VSWR class 1
See Table 24 on
page 61
2.8
The parameter is used to select the
threshold for VSWR class 1 faults
VSWR class 2
See Table 24 on
page 61
2.8
The parameter is used to select the
threshold for VSWR class 2 faults
1. Select the recommended VSWR limit from the table below by
cross-checking the measured VSWR value with the recommended VSWR
alarm limit.
For measured VSWR value (in the test record from Verifying Antenna
Systems) and recommended VSWR alarm limit, see Site Installation
Documentation.
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Defining VSWR Limits
Table 24
Recommended VSWR Limits for Different Initial VSWR Values
Measured VSWR
Value
Recommended VSWR Limit
Class 2 Limit
Class
2 Limit
Class
1 Limit
≤ 1.5 %
≤ 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)
(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 the
list and click Run.
4. In the Define VSWR Limits dialogue box, set the VSWR Class 1 and
Class 2 values according to the table above and click OK.
5. Repeat steps 3 to 4 for each applicable antenna object.
6. Click Close when finished.
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Saving IDB
23
Saving IDB
In case it is necessary to reinstall the IDB, the IDB parameters must be saved
on 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 the
OMT to the DXU.
Note:
If the flash card has to be removed when installing the IDB, see the
document RBS SW Update.
Note:
Using the OMT, always reload the software and install the appropriate
IDB after moving a used flash card to another cabinet. This ensures
consistent software and correct configuration.
Note:
The RBS must be in local mode to accept a new or modified IDB.
1.
If the RBS is in
remote mode, change
the setting to local
mode by pressing the
Local/remote button
on the DXU. The Local
indicator will start to
flash.
DXU rese
t
Local
Local/re
mote
P012062A
2.
Wait until the Local indicator has a constant yellow light, indicating
that 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 OMT
to the RBS.
5.
On the Configuration menu, click Install IDB. The RBS remains in
local mode after the IDB has been installed.
Note:
6.
Do not touch the RBS when any indicators are double-flashing. See
Optical Indicators and Switches.
On the Configuration menu, click Site Specific Data and Display
to open the site_specific_data.txt - window. Check that the correct
parameters have been defined.
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