The Rf Antenna And Feeder; Fault Description; Troubleshooting - Huawei Airbridge cBTS3612 Maintenance Manual

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station

3.11 The RF Antenna and Feeder

3.11.1 Fault Description
I.
The RF antenna and feeder is not working properly

3.11.2 Troubleshooting

The RF antenna and feeder failure will generate a standing
wave alarm, and there will be no transmit power at the antenna port
or the transmit power is too low.
When such a problem occurs, we can check the standing wave
ratio and transmit power (including testing the transmit power at the
coupling-output port of the CDU (or DFU, DDU) panel: Tx -Test)
starting from the antenna port in the CDU (or DFU, DDU) to the
antenna in the BTS. Check the following to locate the problems:
Water infiltration in the antenna and feeder system;
1)
Antenna, feeder and jumper damaged;
2)
BTS antenna and jumper disconnected or in poor contact;
3)
Feeder and jumper disconnected or in poor contact;
4)
5) The connection between the cabinet-top jumper and the
cabinet-top connector disconnected or in poor contact;
6) The connection between the internal cabinet jumper and
CDU (or DFU, DDU) disconnected or in poor contact;
7) The feeder and jumper connector were not installed
correctly.
Chapter 3 Component Failure
3-27
Handling