User's Manual Part 3

RBS 2109 User’s Guide
Performing DTF Test
10. Disconnect the faulty feeder and locate the fault, by performing a Distance
To Fault (DTF) test. For more information, see chapter Antenna System
Tests in this manual.
11. Replace the faulty equipment identified in the DTF test.
Note: The RXBP are not included in the DTF test.
12. If no faulty equipment was identified, replace the antenna.
9.3.10 SO CF RU:48/ GPS Receiver
This section describes how to localise an SO CF RU:48/ GPS Receiver. To
avoid complete loss of traffic, have the BSC operator configuring PCM as
backup synchronisation source (SYNCSRC=DEFAULT).
Related RUs
The RUs listed below have higher priority than the RU described in this section.
If they are present, go to the related section before handling this RU.
• If ‘‘SO CF RU:34/ IDB’’ appears in the OMT, then proceed with Section
9.3.8 SO CF RU:34/ IDB on page 169
• If ‘‘SO CF RU:0/ IXU’’ appears in the OMT, then proceed with Section 9.3.2
SO CF RU:0/ IXU on page 160
Displaying Fault Information
Display fault information according to Section 9.3.1 Reading Fault Status on
page 159.
Perform the following actions step-by-step until the fault ceases:
Replacing GPS Receiver
1. Disconnect the power to the GPS, for example by disconnecting the
connector in the OVP. Wait a few minutes and then reconnect the power.
2. Replace the GPS receiver.
9.3.11 SO CF RU:49/ GPS Receiver DXU Cable
This section describes how to localise an SO CF RU:49/ GPS Receiver DXU
cable. To avoid complete loss of traffic, ensure that the BSC operator configures
PCM as backup synchronisation source (SYNCSRC=DEFAULT).
171EN/LZT 720 0090 Uen R1A 2004-09-17