[mythtv-users] How can I debug dtv_muliplex settings?

R. G. Newbury newbury at mandamus.org
Tue May 22 21:36:00 UTC 2007


Anthony Giggins wrote:
> OK this still isn't working, it worked for 1 week but then for the past 2
> weeks it has only worked twice, I have updated my dtv_muliplex table as
> per the below along with the output from mythbackend -v channel. This is
> the only channel I have these problems with
> 
> *************************** 1. row ***************************
>           mplexid: 5
>          sourceid: 1
>       transportid: NULL
>         networkid: NULL
>         frequency: 711625000
>         inversion: a
>        symbolrate: NULL
>               fec: NULL
>          polarity: NULL
>        modulation: NULL
>         bandwidth: 7
>      lp_code_rate: auto
> transmission_mode: 8
>    guard_interval: 1/8
>           visible: 0
>     constellation: qam_64
>         hierarchy: n
>      hp_code_rate: 2/3
>        sistandard: dvb
>    serviceversion: 33
>   updatetimestamp: 2007-05-18 11:48:27
>

Modulation is NULL and should be qam_64 if Constellation is correct and 
your cableco is using qam_64, otherwise both should probably be qam_256.

And sistandard should be 'atsc' for North American cable.

And are you sure about the frequency standard you used to scan with? A 
frequency of 711625000 is not a straight US-Cable frequency but one of 
the others  IRC or HTC...You might want to try scanning with a different 
set of choices on the Scanning Setup page:

And all of the above is wrong if you are not in North America!  But 
dorksville is in Georgia isn't it?  ;-)


Geoff




-- 
              R. Geoffrey Newbury			


        Helping with the HTTP issue
<a href="http://www.w3.org/Protocols/">HTTP</a>


More information about the mythtv-users mailing list