Comtech EF Data SDM-650B Installation And Operation Manual page 289

SDM-650B Satellite Modem
F.5.2.3.1 Modulator Faults (Mod_FLTS)
RF_Syn
Data Clk
TClk Syn
I-Channl
Q-Channl
AGC_levl
Module
Refer to Section 6.2 for option explanations.
F.5.2.3.2 Demodulator/Decoder Faults (Dmd_Flts)
C_Detect
RF_Syn
Data_Clk
I-Channl
Q-Channl
Dscrambl
BERthrsh
Module
Refer to Section 6.2 for option explanations.
F.5.2.3.3 Common Equipment Faults (CEq_Flts)
Battery
-12 volt
+12 volt
+5 volt
Controlr
Intrface
Refer to Section 6.2 for option explanations.
Rev. 5
Modulator RF synthesizer fault.
Transmit data clock activity fault.
Transmit clock synthesizer fault.
I channel activity fault.
Q channel activity fault.
Automatic gain control level fault.
Modulator module fault. Typically indicates that the modulator module is
missing or will not program.
Carrier detect fault. Typically indicates that the decoder is not locked.
Demodulator RF synthesizer fault.
Receive data clock activity fault.
I channel activity fault.
Q channel activity fault.
Descrambler activity fault.
Bit Error Rate threshold fault.
Demodulator/decoder module fault. Typically indicates that the
demod/decoder module is missing or will not program.
Battery fault.
-12V power supply fault.
+12V power supply fault.
+5V power supply fault.
Controller fault.
Typically indicates that the controller has gone through a power ON-OFF
cycle.
Interface module fault.
Typically indicates that the interface module is missing or will not program. If
using an RS-422 interface module, this fault could indicate the address
jumper settings of JP4 through JP7 are not properly set. Refer to Chapter 3
for more information.
Asynchronous Overhead Channel Unit
F–31