Operation Manual

ID Name Class Severity Unit
122 High output power 0x0104 Error APD
Description The output power is too high.
NOC Actions Contact the systems engineer to check the settings.
Field Actions Readjust the downlink gain to attain nominal output power.
ID Name Class Severity Unit
123 APD Over current 0x0104 Error APD
Description APD has detected an over current situation. Usually a hardware fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions Replace remote unit.
ID Name Class Severity Unit
124 APD reverse power 0x0104 Error APD
Description
The VSWR return loss measurement failed. Generally this indicates a problem
with the antenna network.
NOC Actions
Dispatch field tech to check the antenna network and do VSWR testing on the
passive distribution net..
Field Actions
Check VSWR using a TDR or FDR instrument. Find the problem and replace
cable, connector, splitter, combiner etc.
ID Name Class Severity Unit
125 APD linearizer lost 0x0104 Error APD
Description
The APD has lost the linearizer circuit and is malfunctioning. This is a hardware
fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions Replace remote unit.
ID Name Class Severity Unit
126 APD linearizer failure 0x0104 Error APD
Description
The APD linearizer is failing. This may be due to BW too high, check that all
signals are within what can be handled by the APD (15 MHz).
NOC Actions
Forward the problem to the engineers to check the signals that are fed to the
APD.
Field Actions
Check that all signals to the RU that contains the APD has a total BW less than
15 MHz. If not, change BTS settings to make the signal fit within the 15 MHz
window. If that is not the problem then it is likely to be a hardware fault.
Fiber Distributed Antenna System (Fiber DAS)
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