ALM-26522 RF Unit RX Channel RTWPRSSI Unbalanced

ALM-26522 RF Unit RX Channel RTWP/RSSI Unbalanced Description This alarm is reported when the difference between the RTWP/RSSI of the main RX channel and the RTWP/RSSI of the diversity RX channel exceeds 32 dB (configurable).

Parameters Parameter Name

Parameter Description

Cabinet No.

Cabinet number of the faulty board

Subrack No.

Subrack number of the faulty board

Slot No.

Slot number of the faulty board

Carrier No.

Carrier number

Board Type

Type of the faulty RF unit

RTWP of Main RX Channel (0.1 dBm)

RTWP of the main RX channel

RTWP of Diversity RX Channel (0.1 dBm)

RTWP of the diversity RX channel

Impact on the System Alarm Severity

Minor

Alarm Impact

The receive sensitivity of the RF unit decreases. The demodulation performance of the cell deteriorates. The uplink coverage shrinks.

System Actions None

Possible Causes 

The main RX channel or diversity RX channel of the RF unit is faulty.



The setting of attenuation on the RX channel of the RF unit is incorrect.



External interferences exist on the main or diversity antenna of the RF unit.



The feeder connected to the RF unit is faulty, which results in a high passive intermodulation power of the main antenna.



Antenna cables are connected incorrectly.