[linux-dvb] Kworld DVB-T 210 - dvb tuning problem
hermann-pitton at arcor.de
Fri Apr 11 01:30:41 CEST 2008
Am Freitag, den 11.04.2008, 00:08 +0200 schrieb Hartmut Hackmann:
> HI, Tim
> timf schrieb:
> > Hi Hartmut,
> > OK, found some more spare time, but very, very frustrated!
> > 1) Tried ubuntu 7.04, 7.10, 8.04
> > Tried with just modules that exist in kernel (no v4l-dvb)
> > Tried v4l-dvb from June 2007 and tried current v4l-dvb
> > Tried with/without Hartmut patch - changeset 7376 49ba58715fe0
> > Tried with .gpio_config = TDA10046_GP11_I, or .gpio_config =
> > TDA10046_GP01_I,
> > Tried using configs in saa7134-dvb.c matching tiger, tiger_s,
> > pinnacle 310i, twinhan 3056
> > # Australia / Perth (Roleystone transmitter)
> > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> > # SBS
> > T 704500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE
> > # ABC
> > T 725500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> > # Seven
> > T 746500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE
> > # Nine
> > T 767500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> > # Ten
> > T 788500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
> > 2) I have these saa7134 cards:
> > - pinnacle 310i
> > - kworld 210
> > This cx88 card:
> > - dvico DVB-T Pro hybrid (analog tv not work)
> > - problem only occurs with kworld 210 in linux (works fine in WinXP)
> > 3) In WinXP, all channels, both analog tv and dvb-t found
> > 4) In linux, if start dvb-t first, never scans SBS - dmesg1
> > 5) In linux, if start analog tv first, stop, then start dvb-t, scan
> > finds SBS - dmesg2
> a) The pinnacle 310i finds everything?
> It has the same chipset, but an almost perfectly handled tuner chip...
> This means that your initial config file is ok...
> b) Does this mean that in case 4, all other channels are found?
> c) Case 5: This finds everything?
> d) What happens if you use the scan data of the pinnacle card?
> Does it tune SBS? Does it just take more time to stabilize?
> This can be understood.
> e) Just to be sure: did you clarify the open point with .antenna_switch
> (i think so)
> f) the kernel logs are as expected.
> > 6) Herman mentioned something called a "mode-switch" in the archives,
> > but not any description.
> I guess he meant the switching between analog, radio and dvb-t. This is the
> GPIO handling and card depending.
Tim must have it from when I mentioned the special case of card=87 and
> > I tried to find some data sheets for tda8275 tda8290 but only found the
> > publicity pdf file from Phillips,
> > so at least I can see they go together, so I presume this "mode-switch"
> > is coded into those modules.
> > But those modules work for all other cards, so now I'm lost again.
> > What else should I try?
> If my assumptions above are wrong, there is one other chance:
> Recently i saw another card that does the (unusual) mode switching
> like card 87. So to be sure, you might try to force this card type (be
> aware of the antenna inputs, if in doubt, try both.
> Best regards
For the Medion8800 Quad and CTX948 also showing this issue, needs to
tune analog first to have good recepton on DVB-T, they are a little
weaker on analog than other cards, but after that on DVB-T, they are as
good than known good others.
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