[linux-dvb] Re: Skystar2 rev2.6B working... almost

["Augusto Cardoso" <augusto@carhil.net>]

Hi!

For the Samsung tuner, the master clock should be 88MHz.
If you don't get Viterbi, you should check the Spectral Inversion.

Note that the version of the Samsung NIM that B2C2 uses is custom made. The "normal" tuner is vertical mounted. The B2C2 version is horizontal mounted and there are couple of small changes related to the I2C.
Another important thing to note is that Samsung had two versions of the NIM. In one version(older) the VS (B4) had to be reset for > 1600000. In the current version, and the version that B2C2 uses, the VS bit is reset for > 1500000. I'm not sure what the LG NIM requires.

Hope this helps.

	Augusto


*********** REPLY SEPARATOR  ***********

On 10/8/2003 at 10:36 AM Holger Waechtler wrote:

>Niklas Peinecke wrote:
>> Hi all,
>>
>> I'm working on a driver for the new Technisat Skystar2 rev2.6B (also
>> known as 2.68). It's got a different tuner than the old revision (a
>> Samsung TBMU24112IMB1 with a STV0299 and a SL1935).
>> Basically I fixed a bug in skystar2.o concerning i2c-handling and put it
>> together with the stv0299 driver and the sl1935 tuning routine from the
>> mt312 driver, then I get a signal and a carrier from the card, but no
>> viterbi (signal too low) and no sync.
>> I doubt that it's got something to do with the clock settings, but I
>> haven't done any hardware programming since 1990.
>>
>> Two guestions:
>> * Should I modify the master clock setting? M_CLK is 88 Mhz, but
>> according to the specs I would rather say the stv0299 is set to 22 Mhz??
>> * What should the pll clock setting in the sl1935 tuning routine be?
>> Currently I just left it at 10 Mhz, but I doubt it should be different.
>
>Both clocks need to get set according to the crystals soldered on the
>card, so you need to check which type is used and then adjust the values
>appropriatly.
>
>If you want to get an idea what exactly is causing your problem you
>could log the i2c commands issued by the Windows driver using a i2c
>sniffer like milk/cheapi2c (http://warmcat.com/milksop/), then you can
>set first the PLL/Synthesizer and then the demod to known working values.
>
>Holger
>
>
>
>--
>Info:
>To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.





--
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.