[mythtv-users] DVB-S: Scan works, but NO_LOCK when watching

Nick Rout nick.rout at gmail.com
Sat Jul 12 13:11:27 UTC 2008


On Sat, Jul 12, 2008 at 7:16 PM, Thomas Börkel <thomas at boerkel.de> wrote:
> HI!
>
> I am using 0.21 with DVB-S (Astra 19.2E, Germany).
>
> I can scan with dvbscan and kaffeine.
>
> I can watch TV with mplayer and kaffeine.
>
> I can import channels.conf in MythTV and have lots of channels and I
> also can scan existing transports (after deleting the existing channels)
> and get lots of channels.
>
> Problem is, I get always NO_LOCK when trying to watch TV.
>
> I have a simple single LNB and I set up in the Diseqc settings;
> - LNB
> - type Universal (Europe)
>
> I have compared frequency, polarity, symbol rate and channel id for an
> example channel (ProSieben) from MythTV channel table and dtv_multiplex
> table with the channels.conf from dvbscan and it looks OK. Only the
> frequency was off by 750, but changing that has no effect.
>
> My system is Gentoo 2.6.23, Technotrend 1500 DVB-S cards, budget-ci driver.
>
> Any help would be greatly appreciated. I had a working DVB-C setup and
> now with DVB-S, I got those problems (of course I deleted all channels,
> video sources and capture cards when switching from DVB-C to DVB-S).
>
> Thanks!

Double triple check your horizontal/vertical polarisation settings. I
have seen myth change them all by itself after a scan.

Also mythtv uses different units to dvbscan , by a factor of 1,000 IIRC.


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