[mythtv-users] dtv_multiplex table for US OTA ATSC

[Devin Heitmueller]

> The one's I'm primarily curious about are the following. While these
> have table defaults, many of my existing records accumulated over the
> years for very similar stations vary between having NULL values, or
> the table defaults (for example values like 'a', 'auto' etc). That
> tends to make me suspect that these may be totally moot for US ATSC:
>
> inversion
> fec
> bandwidth
> lp_code_rate
> transmission_mode
> guard_interval
> constellation
> hierarchy
> hp_code_rate
>
> Does anyone know if any of those even matter for US ATSC?

So I cannot comment on the actual database implementation in MythTV,
but in general none of those parameters apply to ATSC/ClearQAM.  They
are all DVB specific.  That said, inversion could be a property found
in ATSC, but there hasn't been a demodulator made in the last 15 years
which doesn't run in "auto" mode.  Oh, and it's possible you'll have
to set bandwidth to 6 MHz, but for both ATSC and ClearQAM it's
*always* 6 MHz (i.e. doesn't change by frequency).

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com