[mythtv-users] How do you "tune" subchannels in QAM?

[John Sturgeon]

Marc Tousignant wrote:

>>Have you been able to successfully tune the frequencies using azap? (get 
>>the instructions for installing it here: 
>>http://www.rsmas.miami.edu/personal/angel/mythtv/air2pc-howto.html) 
>>
>>You might try just getting your card to successfully tune the channels, 
>>and as a worst case scenario, use the frequencies reported by azap for 
>>your channels in the DVB Transports section of the MythTV configuration.
>>
>>But first, just to rule out problems with your driver setup, you need to 
>>make sure azap works.
>>    
>>
>
>John
>
>Azap works to tune channels and Dvbscan confirms there are subchannels
>
>yggdrasil root # azap -c /root/channels.conf-qam-correct -r c82
>using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>tuning to 573000000 Hz
>video pid 0x0000, audio pid 0x0000
>status 1f | signal 0977 | snr fded | ber 00000000 | unc 00000000 |
>FE_HAS_LOCK
>status 1f | signal 0977 | snr fdd5 | ber 00000000 | unc 00000000 |
>FE_HAS_LOCK
>status 1f | signal 0977 | snr fded | ber 00000000 | unc 00000000 |
>FE_HAS_LOCK
>
>  
>
[snip]

>You got any better ideas I'm open to trying.
>
>Got home and tried the channel I setup. It plays.. Kinda.. it's almost as if
>something within mythtv itself is interfering with the signal or hampering
>playback. I get massive pixelization and the audio skips so much you can't
>hear anything understandable.
>
>Feeding from dvbstream to videolan works flawlessly through my network.
>Both my myth system (yggdrasil) and my gaming system (nidheg) are P4
>3.40GHz's with GeForce FX 5700LE's
>The key differences between them are; nidheg has an audigy card and 1 gig
>ram and yggdrasil has the capture cards, PVR-350 and HD3000, and 512 meg
>ram.
>Ya overkill but yggdrasil is intended to be front/back and a transcoder with
>all intentions of lasting a long time.
>
>Marc
>  
>

What happens if you set up the frequencies that get reported by azap in 
the DVB Transports section, then under scan for channels, you select 
"Scan existing transports"? 
For a bit more detail see: http://www.digitalregime.com/mythdvb/setup/

-- 
John Sturgeon <><
http://www.sturgeonfamily.com/mythtv.php