Comtech EF Data CST-5000 - Manual (Page 88)

CST-5000 C-Band Satellite Terminal Operation
Rev. 9 4–13
The following list describes the faults monitored in the FAULTS menu. Refer to
Chapter 6 for troubleshooting procedures for each displayed fault.
Fault Description
RESTART M&C microprocessor experienced a restart due to power failure or watchdog timer
time-out.
UPLINK U/L fault caused by synth, U/C, IFLO, or HPA.
DOWNLINK D/L fault caused by synth, D/C, IFLO, or LNA.
5V PWR +5V power supply fault. This is a status-only fault, and will not turn the transmitter
OFF.
12V PWR +12V power supply fault. This is a status-only fault, and will not turn the transmitter
OFF.
HPA High Power Amplifier fault. Typically indicates that the HPA is not present or is not
operating. This fault will turn the RF transmitter off.
LNA Low noise amplifier fault. Typically indicates that the LNA is not present, has failed,
or has exceeded the high or low fault window trip point. This fault will not turn the
transmitter off.
U/C LOCK Up converter lock fault. Indicates the up converter is not locked up. This fault will
turn the transmitter off.
U/C TUN Up converter tuning fault.
D/C LOCK Down converter lock fault. Indicates the down converter is not locked up.
This fault will NOT turn the transmitter off.
Note: Not applicable to 140 MHz IF option.
D/C TUN Down converter tuning fault.
Note: Not applicable to 140 MHz IF option.
IF LOCK IF synthesizer lock fault. This fault will turn the transmitter OFF.
IF TUN IF tuning fault.