richard@xxxxxxxxxxxxxxxx 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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