Drop And Insert Alarms - Radyne DMD20 Installation And Operation Manual

DMD20 Universal Satellite Modem
Buf <10%
Buf >90%
Buf Clk (Buffer Clock)
Rx Sat (Receive Clock)
Insert
Rx Data (Receive Data)
SatAIS (Satellite Alarm
Indication System)
Dec Lock (Reed-
Solomon Decoder
Lock)
Dintlvr (Reed-Solomon
De-Interleaver
UnCWord (Reed-
Solomon Uncorrected
Word)
RxLvl (Receive Level)
IF Present

6.1.1.5 Drop and Insert Alarms

Alarm
Multiframe Lock
CRC Lock
T1 Signaling
TM103 – Rev. 1.1
The Doppler Buffer is about to
underflow. Could be caused by
poor clocking or satellite fade.
The Doppler Buffer is about to
overflow. Could be caused by
poor clocking or satellite fade.
There is no buffer clock activity.
There is no Receive Satellite
Clock activity. Valid when the
Buffer Clock is set for RX SAT.
There is no Insert Clock activity.
There is not Receive Data
activity.
The modem sees AIS Pattern.
The Reed-Solomon Decoder is
not in a locked state. Could be
caused by the incoming signal or
internal circuit problems.
The Reed-Solomon De-
Interleaver is not in a locked
state. Could be caused by the
incoming signal or internal circuit
problems.
The Reed-Solomon Word was
uncorrectable. Could be caused
by poor link performance.
The Rx Level is below allowable
limits.
IF Hardware is not detected.
Possible Cause
The insert framer is not in sync.
An Insert CRC Fault occurred.
Valid in T1-ESF, PCM -30, or
PCM-30C Modes.
An Insert T1 Yellow Fault
occurred. Valid in T1-ESF, T1D4,
or SCL-96 Modes.
Maintenance and Troubleshooting
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Action
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
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