Re: Problem with Compro T200 (TDA1004x) and tuning Hi

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Mike,

Am Dienstag, den 23.11.2010, 13:36 +0000 schrieb Mike Martin: 
> On 22 November 2010 19:43, hermann pitton <hermann-pitton@xxxxxxxx> wrote:
> >
> > Am Montag, den 22.11.2010, 15:08 +0000 schrieb Mike Martin:
> >> On 22 November 2010 06:08, hermann pitton <hermann-pitton@xxxxxxxx> wrote:
> >> > Hi Mike,
> >> >
> >> > Am Sonntag, den 21.11.2010, 17:58 +0000 schrieb Mike Martin:
> >> >> I am trying to tune channels with this card (which seems to be
> >> >> installed OK). However the output is
> >> >>
> >> >> Using DVB card "Philips TDA10046H DVB-T"
> >> >> tuning DVB-T (in United Kingdom) to 497833000 Hz
> >> >> polling....
> >> >> Getting frontend event
> >> >> FE_STATUS:
> >> >> polling....
> >> >> polling....
> >> >> polling....
> >> >>
> >> >
> >> > usually, in the UK, this can be caused by the missing ability to detect
> >> > some frequencies offsets by the tda10046.
> >> >
> >> > Since you have already a minus of 167000Hz, typically for the UK, in
> >> > your initial scan/tuning file, this most common problem likely can be
> >> > excluded.
> >> >
> >> > So there are eventually three variants causing the problem on a first
> >> > idea.
> >> >
> >> > 1. They changed to 498 MHz. (or did change something else too, "auto"
> >> >   is your friend in the initial scan file then, except for the freq.)
> >> >
> >>
> >> tried that no difference
> >> > 2. Your overall signal is not good enough.
> >> >
> >> well up until friday I was using a HVR900, until it decided to refuse
> >> to believe it was plugged into a USB2 bus, and it was working fine
> >>
> >> > 3. You sit on some kernel with some bug.
> >
> > [...]
> >
> > Well, it is still very easy to install the latest remaining v4l-dvb from
> > hg/mercurial for a quick test too.
> >
> > I don't have your hardware, but all my stuff is still fine there so far.
> >
> > AFAIR, your device, added by Hartmut, has some sort of TD1316 without an
> > extra tda9887 IF demodulator for analog reception soldered outside of
> > the tuner on the PCB.
> >
> > However, it is in a loop for eeprom auto detection on the side of the
> > bridge.
> >
> > If that fails, and for my experience four of five attempts to fiddle
> > with that later did fail, you don't have a chance for any DVB either.
> >
> > You might have to force the card number in such a case, but I'm still
> > far away from what might be going on and your report is without any
> > details so far.
> >
> > Cheers,
> > Hermann
> >
> >
> 
> One problem is the last time I used it - it worked. Although that was
> in a different location/PC

yup, I know too it did work for years.

> Current system P4 Fedora 14, stock kernel
> 
> output scandvb
> 
> scanning uk-Aberdare_auto
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> initial transponder 474167000 3 9 9 6 2 4 4
> initial transponder 482167000 3 9 9 6 2 4 4
> initial transponder 497833000 3 9 9 6 2 4 4
> initial transponder 506167000 3 9 9 6 2 4 4
> initial transponder 521833000 0 2 9 3 0 0 0
> initial transponder 530167000 0 2 9 3 0 0 0
> >>> tune to: 474167000:INVERSION_AUTO:BANDWIDTH_AUTO:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO
> WARNING: >>> tuning failed!!!

One thing I forgot about, you might have to force the bandwidth too.

If that still fails, you might be on the road for bisecting through the
previous patches.

I can't even tell, how reliable bisecting can work currently.

However, it might be worth to test with the remaining v4l-dvb mercurial
code as a start.

Cheers,
Hermann













--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux