[linux-dvb] Writing DVB Software - couple questions

Andrew Hakman andrew.hakman at gmail.com
Wed Feb 23 00:59:05 CET 2005


Hmm, ok. Does anyone know what the BER number means for the stv0299
frontend? It seems to actually be doing something somewhat meaningful
because it's always changing. It would be extremely good to at least
get one meaningfull number out to help with dish alignment or
adjusting, and from talking to people that use commercial equipment,
the BER seems to be the most important figure (which makes sense to me
as well).

Andrew


On Tue, 22 Feb 2005 23:46:24 -0000, Chris Warren <dvb at ixalon.net> wrote:
> 
> > -----Original Message-----
> > From: linux-dvb-bounces at linuxtv.org
> > [mailto:linux-dvb-bounces at linuxtv.org] On Behalf Of Johannes
> > Stezenbach
> > Sent: 22 February 2005 23:41
> > To: linux-dvb at linuxtv.org
> > Subject: Re: [linux-dvb] Writing DVB Software - couple questions
> >
> > [snip]
> > Yeah. Some values *are* scaled into 0..0xffff (e.g. snr), but
> > that still doesn't mean that you get well-defined values.
> > E.g. some cards will return 0x1234 and others 0x2345 for the
> > same input signal. I don't know how you want to calibrate
> > this, even if you'd have a zoo of cards to compare against
> > each other I guess that for consumer equipment even two
> > "identical" cards will return different values...
> >
> > Johannes
> >
> One idea might be in the client software to keep a record of the minimum and
> maximum experienced value and display a percentage/value based on this. So
> you get a scale from 0%-100% for the known limits of the current setup.
> 
> Chris
> 
> 
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