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COM 3000Troubleshooting
Date: Jan 2024 Version 1
5 PREVENTING PRO:IDIOM KEY LOSS
There are two mechanisms which may cause Pro:Idiom key loss in some commercial television sets:
Unapproved mapping or remapping of PIDs.
If external video sources are using PIDs normally reserved for Pro:Idiom key PIDs the TV may lose its ability to
decrypt Pro:Idiom channels.
High quality Edge QAM modulator will relocate the Pro:Idiom key PID to a protected range.
Separate off-air and external video sources from Pro:Idiom channels.
6 TRANSCODER OPERATIONS
6.1 SD ANALOG TRANSCODERS
As DIRECTV migrates away from broadcasting SD content, existing COM systems configured to these channels
will need to transition to the corresponding HD channels. However, the HD channels are encrypted and may not
be suitable for the current installation. To continue to provide the SD digital channels to the property the
encrypted HD content will need to be transcoded back to unencrypted SD.
When using a SD encoder all RF signals come from the transcoders. The COM system sends an IP stream to the
Transcoder which changes the signals to standard definition and outputs to the system. Troubleshooing for the
COM is limited to verifying the COM is properly set up, retuning channels. Rebooting COM and or Transcoders
may resolve some issues. Refer to transcoder manufacturer or your distributor for further support.
6.2 MPEG4 TO MPEG2 TRANSCODERS
DIRECTV has approved the use of the following MPEG2 transcoders.
Video Propulsion
Blonder-Tongue
These devices receive encrypted HD MPEG4 programming from the COM system over IP, transcodes the signal to
MPEG2, and streams it back to the QAM4 in the COM3000 chassis.
The transcoders may output standard definition digital signal or MPEG2 HD streams.
A license key for transcoding will be required. This feature license file is available from your Technicolor
distributor at no charge but requires DIRECTV approval.
NOTE: For accurate bit rates to display Blonder Tongue Transcoders should use port assignments starting at
20070.
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