Modulator Faults; Demodulator Faults - Comtech EF Data SLM-7650 Installation And Operation Manual

SLM-7650 Satellite Modem
Operation
3.4.3.1

Modulator Faults

Menu Item
MODULE
IF SYNTHESIZER
DATA CLOCK SYNTH
I CHANNEL
Q CHANNEL
AGC LEVEL
3.4.3.2

Demodulator Faults

Menu Item
MODULE
CARRIER DETECT
IF SYNTHESIZER
I CHANNEL
Q CHANNEL
BER THRESHOLD
Modulator section fault. Typically indicates that the modulator section will not
program.
Modulator IF synthesizer fault.
Transmit symbol clock lock detect. Indicates that the symbol clock is not locked.
I channel data activity fault.
Q channel data activity fault.
TX IF AGC level fault.
Demodulator/decoder section fault. Typically indicates that the Demod/decoder
section will not program.
Carrier detect fault. Indicates the demodulator/decoder is not locked.
Demodulator IF synthesizer fault. Indicates the IF synthesizer is not locked.
I channel activity fault. Indicates a loss of activity in the I channel of the quadrature
demodulator.
Q channel activity fault. Indicates a loss of activity in the Q channel of the
quadrature demodulator.
Secondary alarm result of the BER threshold set in the DEMOD Configuration
menu.
3-22
Specifications/usage
Specifications/usage
Revision 4
MN/SLM7650.IOM