[mythtv-users] Bad DVB-T picture quality on Nova T-500
Paul Gardiner
lists at glidos.net
Wed Apr 15 08:28:37 UTC 2009
Jeppe Madsen wrote:
>
>
> On Tue, Apr 14, 2009 at 10:12 AM, Paul Gardiner <lists at glidos.net
> <mailto:lists at glidos.net>> wrote:
>
> Jeppe Madsen wrote:
>
> Hi,
>
> I've been running a mythtv setup for quite a while, but have always
> had mixed results with the quality of the recordings. I'm using
> a Nova
> T-500 dual tuner DVB-t card to record standard SD channels.
>
> The problem I'm seeing is that many recordings have very bad mpeg
> artifacts, with high pitching noise etc. I've looked at the logs at
> one of the recordings, and I see a lot of this:
>
>
> Just checking: the Nova T-500 driver needs
>
>
> options dvb-usb_dib0700 force_lna_activation=1
>
> to turn on the low noise amplifier. You do have that set?
>
> On SuSE 11.1, I have it in etc/modprobe.conf.local. Varies
> between distrobutions.
>
>
> I have this in /etc/modprobe.d/options (Debian Etch)
>
> options dvb_usb disable_rc_polling=1
> options dvb-usb-dib0700 force_lna_activation=1 debug=2
>
> I think the differences in module naming shouldn't matter? But thinking
> about I don't seem to get any debug output either so maybe I should try
> fiddling with that...
Sorry, to be accurate I have:
options dvb_usb disable_rc_polling=1
options dvb_usb_dib0700 force_lna_activation=1
Try removing your second line. If it was working then removing it
should lose your signal completely. I'd imagine the module naming
would matter, but I don't really know.
Cheers,
Paul.
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