Comtech EF Data XTD-400C Operation And Installation Manual page 74

Fault Log
Entry
HighPwrA Customer Settable High
Forward RF Power Alarm
HighPwrF Customer Settable High
Forward RF Power Fault
HiTempA Over Temperature Alarm from
thermocouple
HV Over High-Voltage Over Fault
HV Under High-Voltage Under Fault
HV2 Over High-Voltage Over Fault for
TWT 2 in dual tube units
HV2 Under High-Voltage Under Fault for
TWT 2 in dual tube units
MNC-0400-048
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Table 1TWTA Fault Log Troubleshooting
Description
10 of 14
Operation, TWTA ODU Amplifier
Possible Cause of
Fault
The output RF 1. Increase RF
power exceeds the output limit. 2.
set limit. Lower input drive
power. 3. Increase
attenuation. 4.
Disable feature.
The output RF 1. Increase RF
power exceeds the output limit. 2.
set limit. Lower input drive
power. 3. Increase
attenuation. 4.
Disable feature.
Measured Check cooling
tmeperature system for air
exceeds set limits. blockage and
properly operating
fans.
The Voltage level Call customer
applied to the TWT service.
exceeds max limit.
The Voltage level Call customer
applied to the TWT service.
failed come up to
minimum levels.
The Voltage level Call customer
applied to the TWT service.
exceeds max limit.
The Voltage level Call customer
applied to the TWT service.
failed come up to
minimum levels.
Action Needed to
Clear Fault
Revision B