[linux-dvb] Re: tt dvb-c 2.1 and signal quality

[Torbjörn Jansson <torbjorn.jansson@mbox200.swipnet.se>]

linux-dvb-bounce@linuxtv.org <> wrote:
>> Torbjörn Jansson <mailto:torbjorn.jansson@mbox200.swipnet.se> wrote:
>>> As some of you probably already know i have problem with the
>>> signal quality on my dvb-c card, i get lots of bit errors and
>>> uncorectable errors on some channels.
>>> 
>>> I found something intresting by accident.
>>> I left czap running on a channel that i have problem with
>>> (DisMix) and then started to compile the dvb-kernel drivers.
>>> During the compilation i noticed that the audio from my tv
>>> didn't have those audio noises that occurs with bad signal
>>> any more, so i checked the output from czap and there was no errors
>>> at all. 
>>> 
>>> So as long as i have a program that burns cpu i get perfect
>>> signal, zero ber and zero unc.
> 
> I get more errors when running setiathome while using czap but this
> is on a computer that has lots of errors in windows as well.
> 

It's strange that signal quality is affected by cpu usage (for better or
worse), I mean isn't everything done in hardware when I use the tvout from
the card?

Is dvb cards more sensitive to interference than other tv cards? If so where
is the interference coming from? Powersuply? Cpu? Or something else?



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