The COM3000 can modulate up to three AT&T / DIRECTV high definition programs on one
6MHz QAM channel.
➢ Do not to combine higher bandwidth local, sports and premium channels on the same QAM
channel.
➢ In some markets local channels may exceed 18 mbps.
➢ It is a recommended best practice to monitor channels for peak bandwidths and not to exceed an
average bit rate greater than 35mbps per QAM channel.
13 External Video Sources
The COM3000 can modulate video sources from multiple sources.
➢ Each source needs to be an MPEG2 single transport IP stream and will require a QAM output
channel assignment.
➢ Care should be taken in combining multiple digital video sources. In some cases, placing non
Pro:Idiom programing adjacent to Pro:Idiom programming in the channel ring could cause
Pro:Idiom key loss due to Packet Identifier (PID) overlap.
➢ See Section 35 for more information on avoiding Pro:Idiom key loss.
14 TV Compatibility
The Technicolor COM3000 system outputs a MPEG2 transport stream containing the original
encoded video stream as available from AT&T / DIRECTV.
➢ High definition programming is MPEG4 (H.264) with AC3 audio
➢ Standard Definition format is MPEG2 with MPEG1 Layer II audio
➢ High definition programming includes Pro:Idiom encryption unless authorized by AT&T / DIRECTV
to operate in clear HD.
➢ All TVs on the property must be capable of receiving and decrypting MPEG4 encrypted signal.
➢ If using standard definition programming without encryption, some residential TVs will not process
the MPEG2 audio. If you are building a system for standard definition with residential TVs an Audio
Transcoder may be required to provide AC3 audio.
➢ Research and familiarize yourself with all required television programming procedures.
➢ Non-compatible TVs can be used with a Pro:Idiom set back box such as the Technicolor DCI401MCS
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