[linux-dvb] CinergyT2 locking problem when tuning to ARD bouquet

Markus Rechberger mrechberger at gmail.com
Mon Oct 2 10:36:25 CEST 2006


Hi Matthias,

did you try to reload the driver?

Markus

On 9/29/06, Matthias Thomae <bluez at thomae-privat.de> wrote:
> richard at 2006.atterer.net wrote:
> > Hello,
> >
> > quoting Matthias Thomae from his June 20th posting
> > <http://www.linuxtv.org/pipermail/linux-dvb/2006-June/010998.html>:
> >> In short, viewing DVB-T channels from the ARD bouquet (the lowest
> >> transmission band, I think) works very well with my CinergyT2 (SNR
> >> ~70-75% according to femon), but when switching back and forth between
> >> this bouquet and others, sooner or later locking is 'lost'. Other
> >> channels still work. Locking can be regained by re-plugging the USB cable
> >> (and restarting VDR).
> >
> > I also own a Terratec Cinergy T2, and experienced exactly the same
> problem.
> > A quite interesting detail is that I had trouble switching back to ARD
> with
> > vlc, but *not* with kaffeine. Kaffeine worked just fine from the
> beginning.
> > I never tried vdr.
>
> My problem occurs with vdr *and* kaffeine, and, what's more, the same
> problem occurs on Windows with both Terratec TV applications.
>
> > Usually, the symptom with vlc was that I had to switch to one of ARD's
> > channels (Das Erste, arte, Phoenix, EinsPlus) as the *first* station after
> > plugging in the T2, otherwise switching to it from another frequency would
> > fail.
>
> This is different from my problem, where initially tuning works
> perfectly, but after a varying amount of tuning it starts to fail for
> certain channel transitions.
>
> In detail, switching to a channel in the ARD group (frequency 184000)
> works from these channel groups:
> 778000 (z.B. Bayer. FS), 786000 (Eurosport), 834000 (RTL)
> but fails from these channel groups:
> 578000 (ZDF), 626000 (Pro7)
>
> > After a great deal of experimenting, I found an astonishingly simple fix:
> > *Get a better antenna!* As soon as I connected a better antenna, switching
> > back and forth between channels worked fine in vlc. My antenna looks like
> > this (more or less): <http://www.yucel.de/max/DVB-Zim.Ant.jpg>
>
> I also had this hypothesis, or rather the one of a too weak signal,
> although I get signal strenghts of 70-75% as mentioned above. Yet, I
> already have a good antenna (a log-periodic Wittenberg WB345), and I
> even got an amplifier which improved reception a little but still I have
> this problem.
>
> What's more, I also got a different DVB-T Stick (Pixelview PlayTV 505)
> which doesn't have these tuning problems.
>
> > I noticed that (like me) you seem to live in Munich. I suspect that the
> > ARD bouquet's signal might be weaker than the others; maybe it isn't
> > broadcast from the Olympiaturm, or it is broadcast with less power.
>
> I live in the vicinity of Nuernberg, and here ARD is quite strong
> (70-75%) compared to RTL for example (55-60%).
>
> > Still, it is weird that kaffeine works fine. Judging from this, the T2's
> > behaviour could probably be improved.
>
> Probably, or maybe I have a broken one after all.
>
> > Cheers,
> >
> >   Richard
>
> Regards.
> Matthias
>
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-- 
Markus Rechberger



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