[mythtv] [mythtv-commits] mythtv commit: r9482 by danielk

Kevin Kuphal kuphal at dls.net
Mon Mar 27 01:33:24 UTC 2006


Daniel Kristjansson wrote:
> On Sun, 2006-03-26 at 18:05 -0600, Kevin Kuphal wrote:
>
>   
>> Just out of curiosity, based on this channels.conf, what exactly am I 
>> tuning?
>> WTTWDT2:567000000:QAM_256:2432:2433:5
>>     
> I believe the last number, '5' here, is the mpeg program number,
> and that is what you are tuning.
>
>   
>> I just assumed it was ATSC over QAM but am I mistaken in my terminology?
>>     
> It is only ATSC when you have the VCT table, which means you
> have a ATSC major and minor channel. When you use channels.conf
> import, or when the MythTV scanner can not find a VCT table
> you are tuning on the PAT/PMT so it is MPEG over QAM. This is
> how most NTSC channels, and the ATSC channels on illegal Cable
> providers, is transmitted.
>   
Interesting.  I guess I just always figured what was on QAM was ATSC.  
This is my "learned something new today" thing.

Kevin


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