Comtech EF Data SDM-9000 - Manual (Page 99)

SDM-9000 Satellite Modem Operation
Rev. 4 4–25
4.2.3.1 Modulator Faults
IF SYNTHESIZER Modulator IF synthesizer fault.
DATA CLOCK ACT TX data clock activity alarm.
Indicates that data clock activity was not detected.
DATA CLOCK SYN TX clock synthesizer fault.
Indicates the internal VCO has not locked to the incoming data clock.
I CHANNEL I channel data activity fault.
Q CHANNEL Q channel data activity fault.
AGC LEVEL TX IF AGC level fault.
INTERNAL SCT SYN Internal TX data clock synthesizer fault.
EXT REF ACT Modulator fault.
This is only used with the External Reference High Stability option.
Indicates modulator does not have an external reference.
MODULE Modulator module fault.
Typically indicates that the modulator module is missing or will not
program.
PROGRAMMING Modulator programming fault.
CONFIGURATION Modulator configuration fault.
Indicates the modulator cannot execute a programmed configuration
parameter.