Operation Manual

ID Name Class Severity Unit
121 Return Loss 0x0103 Error MPI
Description VSWR alarm. Generally this indicates a problem with the antenna network.
NOC Actions Dispatch field tech to check the VSWR on the line from the remote unit.
Field Actions See actions ad NOC.
ID Name Class Severity Unit
122 High output power 0x0103 Error MPI
Description The PA is being overdriven. This is a settings problem.
NOC Actions Consult with systems engineer to have the system readjusted.
Field Actions Re-commission the downlink on affected unit.
ID Name Class Severity Unit
131 LPA lost 0x0103 Error MPI
Description
The MPI board is not able to talk to the MCPA. This is generally a hardware
fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions Replace remote unit.
ID Name Class Severity Unit
132 LPA low gain 0x0103 Error MPI
Description
The gain in the MCPA is not what it is supposed to be. This is generally a
hardware fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions Replace remote unit.
ID Name Class Severity Unit
133 Loop fail 0x0103 Error MPI
Description
This alarm indicates a failure of the LPA in to properly lock on to the input
signals and linearize them. This could be due to configuration parameters that
need to be changed. This alarm may appear from time to time when BTS
signals are lost etc.
NOC Actions
If the alarm happens frequently on a unit or stays on for a long time, attempt
to reset the unit and see if it clears. If it comes back notify a systems engineer.
Field Actions
Re-commission the downlink to check if the settings are right. Observe the
reactions of the unit. If the LPA loop fail alarm reoccurs immediately or
frequently consider replacing the unit.
Troubleshooting
152