[mythtv-users] UK DVB-T problems

[Robin Elvin]

On Saturday 08 January 2005 11:50, Ciaran wrote:
> On Fri, 7 Jan 2005 21:54:33 -0000, Will <egroups at klubbing.com> wrote:
> > No problem here, Bilsdale transmitter, AverTV 771, Duron 700, sorry!
> > What transmitter are you using?
> > 
> > Will
> > 
> > > Sorry to jump on,  Anyone noticed any strange issues with UK-TV
> > > History?  For me it seems as if every other video frame is skipping,
> > > yet the audio is fine.  I don't believe its a signal issue as I can
> > > receive most other channels just fine :) Very strange!
> > > - ciaran
> > >
> > >
> > > On Fri, 7 Jan 2005 11:27:44 +0000, Nick Craig-Wood <nick at craig-wood.com>
> > > wrote:
> > >> On Thu, Jan 06, 2005 at 11:45:24PM +0000, James Fidell wrote:
> > >> > Having managed to find a few channels from the Mendip transmitter
> > >> > (which
> > >> > carries just about everything), I'm getting:
> > >> >
> > >> > $ tzap "BBC ONE"
> > >> > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> > >> > tuning to 778000000 Hz
> > >> > video pid 0x0258, audio pid 0x0259
> > >> > status 01 | signal 1717 | snr 0000 | ber 0000ffff | unc 0000000b |
> > >> > status 1f | signal 1616 | snr 9292 | ber 00008581 | unc 00000007 |
> > >> > FE_HAS_LOCK
> > >> > status 1f | signal 1717 | snr 9090 | ber 000073c9 | unc 00000009 |
> > >> > FE_HAS_LOCK
> > >> > status 1f | signal 1717 | snr 9696 | ber 0000680f | unc 0000000e |
> > >> > FE_HAS_LOCK
> > >> > status 1f | signal 1717 | snr 9999 | ber 00005e70 | unc 00000009 |
> > >> > FE_HAS_LOCK
> > >> > status 1f | signal 1717 | snr 8f8f | ber 00006a03 | unc 00000004 |
> > >> > FE_HAS_LOCK
> > >> > status 1f | signal 1717 | snr 9292 | ber 0000639f | unc 00000007 |
> > >> > FE_HAS_LOCK
> > >> >
> > >> >
> > >> > I'm guessing those figures really aren't good news and might explain
> > >> > why
> > >> > I can't see any channels from other muxes on that transmitter?
> > >>
> > >> Yes you are correct!
> > >>
> > >> The mux with BBC ONE (Myx 1) in is broadcast in QAM 16 which is better
> > >> than the QAM 64 of the other multiplexes, and is probably at higher
> > >> power.  You have a very low signal on that so its unlikely you'll get
> > >> the other muxes.  You are getting uncorrectable errors in the above
> > >> which will render the video very annoying!
> > >>
> > >> My worst multiplex (Mux A) has around 0x1000 correctable errors per
> > >> second and no uncorrectable errors.  You've got about 10 times that
> > >> many errors.  On Mux 1 I get no ber/unc at all!
> > >>
> > >> Use this (sort by mux) if you want to see what channel is where
> > >>
> > >>   http://homepages.enterprise.net/cavan/scripts/dtt/dtt.cgi
> > >>
> > >> So, better upgrade your aerial!
> > >>
> > >> --
> > >> Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick
> > >>
> > >>
> > >> _______________________________________________
> > >> mythtv-users mailing list
> > >> mythtv-users at mythtv.org
> > >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> > >>
> > >>
> > >>
> > >
> > >
> > > --
> > > - Ciaran
> > >
> > 
> > 
> > --------------------------------------------------------------------------------
> > 
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> > 
> Winterhill,  nova-t, 2.8Ghz Celeron :( Its very strange.... I was sort
> of hoping it was  generic issue :)
> 

No problem for me either, Tacolneston, Nova-T.

Have you got access to a Freeview box to check your signal?

--
Rob