Receive Lna Distribution Unit (Rldu); Fault Description; Troubleshooting - Huawei Airbridge cBTS3612 Maintenance Manual

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
alarm will stop. If the power-amplification gain decrease is within
3~6dB, it is a normal situation whether the alarm is generated or not.
We can find out if there is a "Power-amplification gain decrease"
alarm by querying the current alarm of the BTS on the OMC or local
maintenance console.
The fault elimination process should be carried out step by step,
go directly to next step if the problem can not be solved :
Check if the power output of the BHPA is too high. If so,
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decrease it;
Replace the BHPA.
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3.9 Receive LNA Distribution Unit (RLDU)

3.9.1 Fault Description
Standing wave alarm of antenna and feeder
I.
RLDU failure
II.

3.9.2 Troubleshooting

Standing wave alarm of antenna and feeder
I.
When the antenna goes wrong, it will cause the standing wave
ratio to increase; or if the connection between the antenna and the
feeder is abnormal or there is a feeder failure, the standing wave
alarm of antenna and feeder will be generated.
Chapter 3 Component Failure
3-23
Handling