User Manual

6 Troubleshooting
Base Station User Guide 61
Symptom Possible Fault Correction
Power amplifier display
indicates OUTPUT
POWER above 20W
High drive power to
the PA (or wrong
display)
10. Compare PA reported
received level to the FAT
result (section 5.1.2.1).
1. Check the MMU reported received
level. Compare to the FAT result
(section 5.1.3.1).
2. If the level difference is more than
4 dB, call a technician.
; Note: Output level can be decreased
by decreasing the Upconverter gain on
the Upconverter front panel.
Power amplifier display
indicates AMPLIFIER
OVERDRIVEN
(2)
Excessive PA input
level
Check the PA input level on TP5, TP6,
TP7.
MMU acquires
downstream signal, but
doesn’t finish upstream
registration process
Upstream spectrum
Inversion is not ON
Check the Spectrum Inversion box on
the Arcadian Networks Configuration
Tool Upstream menu (refer to the
NMS User Guide for instructions). It
should be ON.
When the HIGH REFLECTED POWER message appears, the PA shuts down for five
minutes, after which it turns back on and checks again for high VSWR. It then returns to
the same power level it was set to.
When the AMPLIFIER OVERDRIVEN message appears, the PA shuts down for one
minute, after which it turns back on and checks again for an overdriven amplifier. It then
returns to the same power level it was set to.
WMTS Digital Display and LED Indications
During system initialization, the universal cards’ digital display combined with the C&F
four LED indicators, provide detailed information about the status of the WMTS, as
detailed below.
If problems occur in the initialization process, observe these indicators and check if the
indications are accurate. This information should be recorded and transmitted to
Arcadian Networks Support as an aid in identifying faults.
Digital Display Indications at System Initialization for all Universal Cards
 H – Start of initialization
 X – Hardware failure
 Y – Missing software file