Comtech EF Data DMD1050TS, Installation And Operation Manual

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DMD1050TS Satellite Modem Board
Revision 1
Maintenance and Troubleshooting 5–3 MN-DMD1050TS
5.2.1.4 Minor Rx Alarms
Alarm Possible Cause
BUFF UNDERFLOW Shows that a Doppler Buffer underflow has occurred
BUFF NEAR EMPTY Shows that the Doppler Buffer is about to underflow
BUFF NEAR FULL Shows that the Doppler Buffer is about to overflow
BUFF OVERFLOW Shows that a Doppler Buffer overflow has occurred
RX DATA ACTIVITY Shows that there is no Rx Data activity; for the Ethernet Interface, shows that no Ethernet
port is active (no cable is connected)
SAT AIS Shows that AIS has been detected in the receive satellite data stream
IFEC LOCK Shows that the Inner Codec is not locked
TPC Conflict Chk Shows there is a TPC mismatch
OFEC LOCK Shows that the Reed-Solomon Decoder is not locked
INTERLEAVER Shows that the Reed-Solomon Interleaver is not synchronized
EBNO (dB) Shows that the Eb/No is outside of limits
IBS BER Shows that there are more than one in 1000 bits in error in IBS mode
RX DVB FRAME
LOCK
Shows that the Rx Satellite Data Stream Framing is not DVB
Encryption TRANSEC Module is enabled but not synchronized
5.2.1.5 Common Major Alarms
Alarm Possible Cause
TERR FPGA CFG Shows an Interface Card FPGA configuration failure, likely caused by a missing or incorrect
file
CODEC FPGA CFG Shows Turbo Codec Card FPGA configuration failure, likely caused by a missing or incorrect
file
CODEC Dev CFG Shows Turbo Codec ASIC failed to program
+1.5V RX SUPPLY Shows the measured voltage of the 1.5 Volt Rx power bus inside the modem
+1.5V TX SUPPLY Shows the measured voltage of the 1.5 Volt Tx power bus inside the modem
+3.3V SUPPLY Shows the measured voltage of the +3.3 Volt power bus inside the modem
+5V SUPPLY Shows the measured voltage of the +5 Volt power bus inside the modem
+12V SUPPLY Shows the measured voltage of the +12 Volt power bus inside the modem
-12V SUPPLY Shows the measured voltage of the -12 Volt power bus inside the modem
+20V SUPPLY Shows the measured voltage of the +20 Volt power bus inside the modem
EXT CLOCK ACT Shows that the External Clock is not active
EXT REF ACT Shows no activity on the External Reference
EXT REF LOCK Shows that the External Reference PLL is not locked
Transec Pwr Test Shows the TRANSEC module has failed POST (Power-On Self Test)