[linux-dvb] Re: Twinhan DST / TS204 and signal quality questions

[Werner Johansson <wj@yodel.net>]

Johannes Stezenbach wrote:

> If a STB displays a weak signal, what happens? Right, people call the
> support hotline and complain: "Why is my signal so bad? My Mom's
> STB gets a much stronger signal!"
> Solution from the marketing department: Adjust the scale of
> the displayed signal strength so it is always >80% (unless the
> signal is so bad that the picture suffers). Then both the
> customers and the support people are happy.
:) Ah, I should have guessed... Never underestimate the power of the 
marketing department! So that's why one should never use the signal 
meters on a consumer STB to do LNB/dish alignment work...

> > The TS204 flag, would that imply that the Reed-Solomon FEC has not been done
> > on the card itself, or are the last 16 bytes of data just junk from the
> > correction process?
>
> It's junk.
At least that's good news, but then the natural follow-up question - why 
would the tuner output that junk if there's absolutely no need for it? 
In the Twinhan case it's easy to get rid of it anyway by some DMA code 
in the BT chip (and I guess that's how it's done in the driver?), but it 
seems to be one stupid tuner! :)

/Werner