[mythtv-users] DVB-T Problem Locking Signal

Ian Barton lists at manor-farm.org
Wed May 9 07:03:34 UTC 2007


> I had a similar problem with a pair of Compro T200 cards in one of my
> backends recently. A KWorld(cx88 based) worked fine, but MythTV refused
> to get a lock when using any of the Compro cards(saa7134 based). Signal
> strength was ~75%, but the OSD also reported a BER of 65535.
> 
> A channel scan under mythtv-setup would sometimes work, and other times
> fail completely. However, using dvbscan to generate a channels.conf and
> then using tzap worked fine, and the values for SNR and BER were
> normal(not what MythTV's OSD reported).
> 
> I solved the problem in the end by generating a channels.conf using
> dvbscan, sorting and finding all the multiplexes and then did a tuned
> frequency scan using *exactly* the settings from the channels.conf for
> that plex(inversion/guard/etc) and told it to ignore the signal timeout.
> This resulted in a successful channel scan.
> 

This happened to me with earlier versions of MythTV on teh same hard 
ware. However, the last few versions have managed to complete channel 
scans with no problem.

I'll try using the info from the channels.dvb generated by Kaffeine and 
see what happens.

Ian.


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