DMD1050TS Satellite Modem Board
Revision 1
Maintenance and Troubleshooting 5–3 MN-DMD1050TS
5.2.1.4 Minor Rx Alarms
Shows that a Doppler Buffer underflow has occurred
Shows that the Doppler Buffer is about to underflow
Shows that the Doppler Buffer is about to overflow
Shows that a Doppler Buffer overflow has occurred
Shows that there is no Rx Data activity; for the Ethernet Interface, shows that no Ethernet
port is active (no cable is connected)
Shows that AIS has been detected in the receive satellite data stream
Shows that the Inner Codec is not locked
Shows there is a TPC mismatch
Shows that the Reed-Solomon Decoder is not locked
Shows that the Reed-Solomon Interleaver is not synchronized
Shows that the Eb/No is outside of limits
Shows that there are more than one in 1000 bits in error in IBS mode
Shows that the Rx Satellite Data Stream Framing is not DVB
TRANSEC Module is enabled but not synchronized
5.2.1.5 Common Major Alarms
Shows an Interface Card FPGA configuration failure, likely caused by a missing or incorrect
file
Shows Turbo Codec Card FPGA configuration failure, likely caused by a missing or incorrect
file
Shows Turbo Codec ASIC failed to program
Shows the measured voltage of the 1.5 Volt Rx power bus inside the modem
Shows the measured voltage of the 1.5 Volt Tx power bus inside the modem
Shows the measured voltage of the +3.3 Volt power bus inside the modem
Shows the measured voltage of the +5 Volt power bus inside the modem
Shows the measured voltage of the +12 Volt power bus inside the modem
Shows the measured voltage of the -12 Volt power bus inside the modem
Shows the measured voltage of the +20 Volt power bus inside the modem
Shows that the External Clock is not active
Shows no activity on the External Reference
Shows that the External Reference PLL is not locked
Shows the TRANSEC module has failed POST (Power-On Self Test)
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