Tiernan TDR7, Manual

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153
Solving Problems
Output Symptoms and Solutions
No Video Output from the TDR7
1. Ensure that both the
TDR7
and the video monitor are powered
up.
2. Ensure that the cabling from the
TDR7
to the monitor is properly
connected.
3. Verify that the Eb/No level meets minimum requirements for link
operations.
4. Verify that
Status
LED is illuminated, indicating that the
demodulator, decoder, and transport stream are all locked.
5. Ensure that the video cabling to the encoder at the uplink is
properly connected.
6. Ensure that the associated encoder is configured for the video
input source that is being provided.
No Audio Output from the TDR7
1. Ensure that the
TDR7
and the audio monitor are powered up.
2. Ensure that the cabling from the
TDR7
to the audio monitor is
properly connected.
3. Verify that the Eb/No level meets minimum requirements for link
operations.
4. Verify that
Status
LED is illuminated, indicating that the
demodulator, decoder, and transport stream are all locked.
5. Ensure that the audio cabling into the encoder at the uplink is
properly connected.
6. Ensure that the associated encoder is configured for the audio
input source that is being provided.
Jerky or freeze frame video output or the demodulator periodically loses
lock
1. Verify that the aggregate data rate does not exceed the transport
clock rate. If necessary, increase the encoder transport clock rate,
or reduce the encoder compressed video bit rate.
2. Set the video delay to +600, if necessary, to compensate for
TVCOM encoder clocking.