[linux-dvb] ves1820 FEC, have problems with cable provider

thomas schorpp t.schorpp at gmx.de
Sun Jul 24 15:39:08 CEST 2005


Patrick Boettcher wrote:
> Hi,
> 
> On Sun, 24 Jul 2005, thomas schorpp wrote:
> 
>> 3. pls provide technical arguments for your claim.
> 
> 
> Uh, sorry, I meant no offense. I just wanted to confirm your observations.

me not, too ;)

> 
> I was using the ves1820-based FF card for one year successfully (no
> problem on any frequency). Then it begins to have problems with some
> frequencies. At first I assumed physical cable problems, but it wasn't
> the case... From day to day it got worse, up to that even the former
> good frequencies have become distorted.

cannot confirm here, looks f independent...

> 
> To check if it is my cable connection's fault or a hardware failure of
> the ves1820, I got a stv0297-based DVB-C card and _every_ frequency
> available was _very_ good again, with the same cable.

not confirmed. just crosschecked with a collegue with new dbox over
phone, same problems on same channels.

and, as i stated, only on some hours of the day, so the problem is not
permanent, so not hardware old-age failure.

so we suspect kabelbw's satellite downlink station in the region...
i had got problems with same channels ard-digital on astra at bad
weather and clouds, there are clouds now here, ill wait for ard's
statement next week.

> 
> So I assume the ves1820-based board has some kind of hardware failure
> which is raising steadily.

unlikely, the QA requirements at manufacturing (vlsi, philips, siemens)
are real hard, and these chips are not "made in china".

claimed MTBF is surely 5-10 years for such chips.
more likely your card got overheated in summer in the pc case... ;)
this would cause chip damage, or electrostatics.

> 
> Patrick.
> 
> -- 
>   Mail: patrick.boettcher at desy.de
>   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/
> 

y
tom




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