Parameters
| ID | Name | Meaning |
|---|---|---|
| 1 | Site No. | Number of the site where the faulty board or module is located Value range: 0-2047 |
| 2 | Board Type | Number of the type which the faulty board belongs to. 107:BTS3900E |
| 3 | Board No. | Number of the fault board 0-3: BTS3900E |
| 4 | PassNo | Number of the passage where the faulty board is located. |
| 5 | SubLink No. | Alarm sub-category number 255:None |
| 6 | Cell Index | Index of the cell where the board or module is located 0-2047: Cell index of the faulty cell in the data configuration 65535: None |
| 7 | Site Type | Type of the site where the faulty board is located. 30:BTS3900E; |
| 8 | RackNo | Number of the rack where the faulty board is located. |
| 9 | BoxNo | Number of the subrack where the faulty board is located. |
| 10 | SlotNo | Number of the slot where the faulty board is located. |
| 11 | Site Name | Site Name |
| 12 | Alarm Attribute | Alarm Character 0:Normal 1:Transient Count |
Impact on the System
When the alarm is generated, the output power of the antenna is reduced and the coverage area is reduced.
Possible Causes
- The resistances of the antenna system are not matched.
- The forward and inverse power detection channel parts are faulty or the VSWR is abnromal due to certain discrete parts.
- The BTS3900E has interference because of strong signals in the environment.
- The performance of the antenna system or the duplexer deteriorates.
Procedure
-
Reset the BTS3900E module. Check whether the alarm is cleared.
Y => The alarm is cleared. End the alarm handling.
N => The alarm is not cleared. Go to procedure 2.
-
Check whether the connections between the BTS3900E antenna port and the antennas are normal.
-
Check the connections between the jumper and the duplexer, between the jumper and the feeder, between the jumper and the surge protector, and between the jumper and the antenna.
Y => All the connections are good. Go to procedure 3.
N => A connection is not secured. Go to step b.
-
Tighten the loosened connectors. Check whether the alarm is cleared.
Y => The alarm is cleared. End the alarm handling.
N => The alarm is not cleared. Go to step c.
-
Check whether the water leaks into the connectors between the jumper and the duplexer, between the jumper and the feeder, between the jumper and the surge protector, and between the jumper and the antenna.
Y => There is water leakage. Go to step d.
N => There is no water leakage. Go to procedure 3.
- Block the Associated Cell.
- Replace the connector where water leakage occurs and make waterproof protections.
-
Unblock the Cell. Check whether the alarm is cleared.
Y => The alarm is cleared. End the alarm handling.
N => The alarm is not cleared. Go to procedure 3.
-
Check the connections between the jumper and the duplexer, between the jumper and the feeder, between the jumper and the surge protector, and between the jumper and the antenna.
-
Check the antenna VSWR.
- Measure the VSWR by using the related instrument at the antenna port. Locate whether the fault occurs on the jumper, surge protector, feeder, TMA, or the antenna.
- Block the Cell of the Faulty Parts.
- Replace the faulty parts.
-
Unblock the Cell of the Faulty Parts. Check whether the alarm is cleared.
Y => The alarm is cleared. End the alarm handling.
N => The alarm is not cleared. Contact Huawei Customer Service Center.
NOTE: Locate the fault by using the preceding method. For example, if the measured VSWR of the jumper at the antenna port of the BTS3900E module is abnormal, you can infer that the VSWR alarm is caused by the duplexer. The faults of other components can be located in the same way.