[vdr] Re: problem using 2DVB-cards with vdr

[Onno <onnok@web.de>]

Hmm these frequencies usually suffer from DECT telephones, i cont use 
them at all, i have to use the austrian service from sat1/pro7/kabel1
so i cant watch n-tv,dsf and berlin.tv, but i can stand that..

please check by totaly unplugging all dect telephones and base-stations.

if you cant do this, you can use a analog reciever to croscheck,
on analog sat (astra) n-tv (ANALOG) also gets influenced (2 "lines" 
appear when a dect phone operates to close to the cables or the reciever 
as well. afaik those problems cant be solved be better cables ot 
dish-tuning(tried that for a realy long time!), but only by extra 
shielding (expensive!!) from the LNB up into the PC....

like i said, i lost some tv channels to my new DECT PHONE, sometimes 
these channels do work, since DECT uses bursts and continued frequency 
jumping, but sometimes not (1.FC Köln, Aufstiegsspiel bei DSF grrrr...)

Kind Regards,

Onno Kreuzinger


Christian Vogt schrieb:
> ----- Original Message -----
> From: "Olaf Brömme" <ob@oli-be.de>
>
>
> > Hi,
> > i've got a problem using 2 DVB-cards (HPP Nexus-s + Nova-s) with vdr
> (1.1.29).
>
> > Some times the tv-program interrupts, tv-screen becomes black and tone is
> > lost. After nearly 10...50 seconds both come back and works fine for a
> while.
>
> > It takes place on some channels only, watched on Pro7, Sat1 and K1.
> > Noticeable: all on Astra transponder 104 with vertical polarisation.
> > If the dvb-driver (2003-04-27) runs lonely (switched to one of these
> stations)
>
> > without vdr, the problem doesn't appear. If the Nova-s is removed, (vdr
> and
>
> > Nexus-s only) everything is all right too.
>
>
> Hi Olaf,
>
> just an idea:
>
> I've read some time ago that there ist a (hardware) problem with two sat
> tuner modules located near each other (like if you install two cards in the
> same computer). If both tuners are tuned to the same transponder frequency,
> there was a kind of interference, resulting in a lost sync for both of the
> tuners. The solution for this was to tune both tuners to a slightly
> different fequency (don't know if this solution is implemented in the driver
> or vdr...). Maybe, in your system, the frequency tolerances for the tuners
> are in a way that an attempt to tune to slightly different frequencies
> result in exactly the same frequency in reality.
>
> You may see this behavoiur only with vdr, because its EPG scanner switch
> channels on the secondary card while you're watching with the primary.
>
> Hope this helps a bit...
> Christian



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