[mythtv] [PATCH] Experimental full DVB-T scan

[John Pullan]

On Tue, 2005-04-12 at 22:44 +1000, Andrew Dennison wrote:
> Nigel Pearson wrote:
> > 
> >     Hi Andrew. Thanks for this. I am still working on and testing my
> > own patch from the weekend, and should have an exhaustive email today.
> > 
> >     Two questions though:
> > 
> >> {177500000,228500000,7000000,INVERSION_OFF,BANDWIDTH_7_MHZ,FEC_AUTO,FEC 
> >> _AUTO,QAM_64,TRANSMISSION_MODE_AUTO,GUARD_INTERVAL_AUTO,HIERARCHY_NONE, 
> >> 125000,0},
> > 
> > 
> >     That end frequency is not an even step of 7MHz above the start.
> > By my understanding, it should be 226500000.
> 
> I worked out the channel ranges using a channel listing by frequency 
> from the aba website:
> 
> http://www.aba.gov.au/broadcasters/pdfrtf/tv_7.pdf
> 
> Your correct - looks like I wrote down the wrong number:(
> 
> > 
> >> {529500000,809500000,7000000,INVERSION_OFF,BANDWIDTH_7_MHZ,FEC_AUTO,FEC 
> >> _AUTO,QAM_64,TRANSMISSION_MODE_AUTO,GUARD_INTERVAL_AUTO,HIERARCHY_NONE, 
> >> 125000,0},
> > 
> > 
> >     The references I am using say that it should be UHF 26 thru 69,
> > which would be through to 816500000, but that 68 and 69 "may be re-
> > allocated when DTV is fully established, and will be avoided"
> > (whatever that means)
> 
> I just went to the last channel listed in the above doc. Couldn't find a 
> proper document that outlined the spectrum.
> 
> Good to see peer review at work:)

So use Nigel's numbers ? Either the full set or the optimised set ? I'm
a bit reluctant to use the optimised set, but I will if you guys think
they are OK for the near future (1 year say). 

I wish we could do a "fast" scan hear in the UK, but even with some
tuners being able to lock into a near frequencies I don't think I can
risk it. If I could be convinced that all cards could do it, it might be
a different matter. (My Nova-T can pick up the offset channels while
tuning into the main channels, but I really don't know about any other
cards/tuners)
 
Cheers

-- 
John Pullan <jmp at tarantella.com>