User's Manual

Troubleshooting Alarms
Page 196 FlexWave Prism Element Management System 7.1 User Manual
©
2011 ADC Telecommunications, Inc ADCP-77-177 • Issue 1 • July 2011
Alarm: LPA Over Power
Trap:
fwuRmtLPAOverPowerFault
Alarm Code: AC107
Definition: PRU/URU Linear Power Amplifier (LPA) output power level above
operating limit.
Threshold: Variable by LPA band.
Remedy: Causes include, forward path gains are set too high or Host RF input
levels are too high. Impact is loss of RF service. Reduce PRU forward
gain ("System Configuration -> Configure Remote Forward Gain").
Reset the LPA, and then monitor RF output power levels. Adjust gain
to acceptable values. If the alarm persists, replace the RF Module.
Alarm: LPA VSWR Fault
Trap:
fwuRmtLPAVswrFault
Alarm Code: AC108
Definition: PRU/URU Linear Power Amplifier (LPA) VSWR fault.
Threshold: 3:1
Remedy: Causes include, faulty RF Module, faulty/loose RF Module to bulkhead
cable, faulty/loose external lightning arrestor, cable or antenna.
Impact is loss of RF service. Reset LPA. If alarm persists, replace the
RF Module.
Major Alarms—PRU or URU Power Detector
Alarm: RF Power Low
Trap:
fwuRmtRFPowerFault
Alarm Code: AC114
Definition: PRU/URU RF Output Power below minimum threshold.
Threshold: 0 dBm; can be configured by user, see “Set RF Power Low Threshold”
on page 180.
Remedy: Check for Host DART underdrive alarm or low RF input from BTS.
Check the Host and Remote forward gains are set correctly.
Alarm: System VSWR Fault
Trap:
fwuRmtSystemVswrFault
Alarm Code: AC113
Definition: PRU/URU VSWR measurement above specification.
Threshold: 3:1
Remedy: Perform cable sweeps on external antenna cable system. Put a load
on the PRU/URU by disconnecting the external antenna cable to
determine if the source of the VSWR condition is internal or external.
If internal, replace the RF Module. If external, troubleshoot and
determine source of high VSWR reading.