HI, Nick
Nick Fearnley (Digital Media Projects Ltd.) wrote:
I can't see that IC, could it be integrated into the can? The tuner is
a TD1316A/SIHP.
But the issue remains for the KNC variant of the budget DVB, the TU1216L
tuner has the demod built in. It exhibits exactly the same sypmtoms,
recognised and firmware for the TDA10046HT loads fine but does not
appear to get a lock on the frequency. Most strange, I have noticed
others have the same issue, certainly with the TT1500.
Surely other have had the budget DVB variants of DVB-T working OK? As I
have said, I don't have a problem with the DVB-S budget cards so it must
be tuner/demod related. Is there any debugging I could do to provide
additional info?
-----Original Message-----
From: Hartmut Hackmann [mailto:hartmut.hackmann@xxxxxxxxxxx]
Sent: Mon 12/18/2006 9:40 PM
To: Nick Fearnley (Digital Media Projects Ltd.)
Cc: linux-dvb@xxxxxxxxxxx
Subject: Re: SAA7146 / TDA10046H problem
Hi, Nick
Nick Fearnley (Digital Media Projects Ltd.) wrote:
> Hi,
>
> I have been having problems getting a TT-1500T to work as discussed
> previously. I get exactly the same on a KNC1 DVB-T card. Essentially
> it's the same architecture - although on the TT the TDA is external to
> the tuner (a TD1316A) and the KNC uses the TU1216L. Incidenttally I
> needed to add the budget-av driver to the kernel to get the KNC even
> recognised, the TT not requiring this.
>
> Through dvbtune I get the following:
>
> ./dvbtune -c 1 -f 626000000
> tda1004x: setting up plls for 53MHz sampling clock
> tda1004x: found firmware revision 29 -- ok
> Using DVB card "Philips TDA10046H DVB-T"
> tuning DVB-T (in United Kingdom) to 626000000 Hz
> polling....
> Getting frontend event
> FE_STATUS:
> polling....
> polling....
>
> I have a completely different card in also (Nova-T - Conexant) which
> tunes no problem so I know the feed is fine.
>
> I must have something configured wrong here for both cards not to work
> in the same way. Maybe a kernel driver? I do not enable module support
> - all built into the kernel. I have stripped everything I think I don't
> require from the kernel. Also all the DVB-S (SAA7146 and Conexant) that
> I use work fine, so I'm assuming it MUST be TDA or tuner related here.
> My timer is 1000Hz - but I'm not thinking this is an issue?
>
> Thanks in advance for any pointers.
>
> Nick
>
The card has a TD1316 tuner? Can you find a chip named TDA9889 on the
card? If yes, the channel decoder needs to be programmed differently.
Hartmut
No, The IC isn't in the can. But if yo have the same problem with a TU1216,
this can't be the reasom. I have such a card runnig here. I never tried the
recent firmware 2.9 in direct IF mode (36MHz) but i don't think that this
is the problem.
I remember this was discussed already but are you sure that the reception
parameters are right for your place?
2 notes regarding this:
- Some channel decoders ignore the parameters like FEC GI etc. and always
determine these automatically. The TDA10046 driver doesn't. They *must*
be right or set to automatic.
- In the UK, many transmitters are off the nominal frequency by +/- 166khz
This is not always documented. Opposite to some other channel decoders,
the current tda10046 driver can't compensate this.
So: If some other card works with your parameters, this doesn't prove that
they are right, sorry.
Best regards
Hartmut
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