[mythtv-users] [SPAM] Multiple Tuner problems

[Darren]

On Sat, 22 Jul 2006 07:06 pm, mythtv-users at gserv2-7.phull.myip.org wrote:
> Hiya,
>
> Thanks for the suggestion, unfortunately I have an active splitter and all
> 3 cards work as DVB0 (by changing the modprobe order) with the cards source
> connections unchanged.
>
> When they do tune they always give a very clear picture with no breakup,
> however DVB0 always will tune all channels, DVB1 & 2 for some unknown
> reason will tune some of the channels but not others.

If your able to tune each card and have good output then there can't be 
anything wrong with them on the hardware side, so it may be worth taking a 
closer look at the configuration. It is possible to use the same video source 
for all cards, my 2 cards from 2 different manufacturers happily use the 1 
antenna source. I only ever tuned one card.
>
> Are there any debugging options I can turn on in the card tuning section?
> Which module does the tuning?
 
In a console 'mythbackend --help'  will give you some debug or verbose options 
or info. 
>
> Thanks once again.
>
> --
> Peter D Hull
>
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Darren
> Sent: 22 July 2006 01:09
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] [SPAM] Multiple Tuner problems
>
> On Fri, 21 Jul 2006 07:38 pm, mythtv-users at gserv2-7.phull.myip.org wrote:
> > Folks,
> >
> >
> >
> > I have a generally very effective MYTHTV installation with one annoying
> > problem.
> >
> >
> >
> > Basically I have three tuners in my backend:-
> >
> >
> >
> > DVB0 - Newish Hauppauge NOVA-T
> >
> > DVB1 -  Oldish Hauppauge NOVA-T
> >
> > DVB2  - DVB-T USB stick
> >
> >
> >
> > All 3 scan and tune fine with tzap.
> >
> >
> >
> > Whichever I make the first tuner (DVB0) works rock solid with MYTHTV.
> >
> >
> >
> > Tuners DVB1 and DVB2 both work part of the time, however they won't
> > always lock to the tuned channel. In livetv this gives warnings and no
> > video and in recording mode zero length files occur.
> >
> >
> >
> > My guess is that they are tuning some multiplexes not others. Annoyingly
> > its not very repeatable they work some of the time.
> >
> >
> >
> > How should I go about diagnosing this problem?
> >
> >
> >
> > The silly thing is DVB0 always tunes OK whatever card I make it!!
>
> Hi there
> Will need more information like, does each card have it's own source? Where
> I
> live only 1 DVB card can be connected to the antenna. If I were to connect
> an
> active splitter it would work for all cards because the load on the antenna
> is minimal.
> Try each card individually and if they all work look at the source, DVB
> cards
> require a good signal and puts considerable load on the antenna. You may
> still need an active splitter using cable.

-- 
"Better to remain silent and be thought a fool than to speak out and remove
all doubt." - Abraham Lincoln