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Troubleshooting
01-0870-401B 01/03 55
The Fault Descriptors are defined in the following table.
DMD.A QPSK Demodulator A TDEM-6110
DMD.B QPSK Demodulator B TDEM-6110
DMD.C QPSK Demodulator C TDEM-6110
DMD.D QPSK Demodulator D TDEM-6110
UDA User Data A TMAC-6125
UDB User Data B TMAC-6125
VD Video Decoder TDEC-6100
HDVD High Definition Video Decoder TDEC-6161
1
If the TAUD-6100 is installed, it controls ADA through ADD and the TDEC-6100 controls ADE and ADF. If
the TAUD-6100 is
not
installed, the TDEC-6100 controls ADA and ADB.
Command Mnemonics (continued)
Abbreviation Command Mnemonics Option Module
Fault Descriptors
Front Panel
Descriptor
Fault Log
Descriptor
Explanation Possible Cause
FIFO Idle FIFO Idle Input to FIFO buffer has stopped No video, audio, user data, or teletext
input
FIFO Over FIFO Overflow FIFO input rate exceeds output rate Delay values too great
FIFO Undr FIFO
Underflow
FIFO output rate exceeds input rate Interrupted input
Init Initialize Failed Initialization failure Corrupted configuration files or
hardware failure
Bad Eb/No Bad Eb/No Input signal to noise ratio below DVB
specification
Insufficient transmit power, improperly
oriented satellite dish, improperly
polarized LNB, or excessive cable
loss
Input Input Signal
Loss
No input signal detected Missing input signal or incorrect
demodulator configuration
Data Err Data Error Errors detected in the format of the
video, audio, and so on
Bit errors introduced in the link or at
the source
No PIDs No PIDs
Present
No PIDs available for the selected
service
Command mnemonic not enabled at
the encoder
PAT Loss PAT Timeout PAT information not received Missing input signal or incorrect
demodulator configuration
PMT Loss PMT Timeout PMT information not received Missing input signal or incorrect
demodulator configuration
Sys Reset System Reset A system reset exception has
occurred
Software or controller board error
Trans Err Transport Error Transport packed error occurred Noisy transport stream input