[mythtv-users] Making it work

[Alan Chandler]

On Thursday 14 September 2006 15:26, Stephen Boddy wrote:
> On Thursday 14 September 2006 13:19, Alan Chandler wrote:
> > I have tried scan (aka dvbscan - scan is Debian's name) but there is
> > something I don't understand.  If you look at the supplied transmitter
> > files (and if you look at the site references above) they only list one
> > frequency. My nearest transmitter, UK Crystal Palace transmits digital on
> > 6 frequencies, and the lowest of these frequencies is below the one in
> > the supplied file.  So what does the transmitter file actually tell scan.
> >  I can't find any explanation of this at all.
>
> My understanding is that the frequencies are a set distance apart and that
> info is also in the transmitter file, i.e.
> start freq = mux 1
> start freq + (interval * 1) = mux 2
> start freq + (interval * 2) = mux 3
> and so on.

I don't think so, here is the supplied file for Crystal Palace

# Crystal Palace
# T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
T 505833333 8MHz 3/4 NONE QAM16 2k 1/32 NONE

Here is one I manually created by looking up the frequencies that it actually 
uses
# Crystal Palace
# T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
T 506000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
T 482000000 8MHz 3/4 NONE QAM64 2k 1/32 NONE
T 562000000 8MHz 3/4 NONE QAM64 2k 1/32 NONE
T 530000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
T 578000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
T 538000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE


The muxes are not incrementally increasing.
(and I have no idea what other parameters are, although I think I got the QAM 
modes right)



-- 
Alan Chandler
http://www.chandlerfamily.org.uk