Comtech EF Data SDM-650B - Manual (Page 289)

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