[linux-dvb] Re: Help-- Receive C band program using WinTV Nova

["Frank Ta" <frankta@263.net>]

Dear sir,
     I  modified the lines in dvb.c.The result is OK. ;-).Thank you.Next time,I will try to patch the dvb.c so that I can set the inversion dynamicly.
   Thank you again.

Best regards,
Frankta
----- Original Message ----- 
From: Ralph Metzler <rjkm@convergence.de>
To: Frankta <frankta@263.net>
Cc: linuxTV <linux-dvb@linuxtv.org>; Ralph Metzler <rjkm@convergence.de>
Sent: Wednesday, August 29, 2001 6:29 PM
Subject: [linux-dvb] Help-- Receive C band program using WinTV Nova


> Frankta writes:
>  > Dear sir,
>  >    I have a problem about receiving C band program by using WinTV NOVA.
>  >    My parameter is LNB 5150  Freq 3780 SR 30800 
>  >    driver 2001-8-16
>  >    I have an "old" DVB-S card(demodulator is VES1893).When I try to receive the program with these parameters by using szap, everything is OK.
>  >    Now,I have got a WINTV NOVA(REV 1.1 with tuner STV0299), it can work on Ku band.When I try to receive the C-band with the same szap and parameters,cannot sync.
>  >    Any suggestions will be really apreciated.
>  > 
> 
> Are they using spectral inversion?
> The VES1893 can automatically detect this, the STV0299 cannot.
> So, maybe this is the reason that you cannot receive it with 
> the STV0299.
> 
> The spectral inversion in the STV0299 can be set in register 0x0c.
> Since this register also contains the bits for voltage control it
> is written in SetVoltage() in DVB/driver/dvb.c.
> Please change
> 
> 
>         if (dvb->demod_type==DVB_DEMOD_STV0299)
>                 demod_writereg(dvb, 0x0c, 1|(power ? 0x40 : 0)|(voltage ? 0x10 : 0));
> 
> 
> into
> 
>         if (dvb->demod_type==DVB_DEMOD_STV0299)
>                 demod_writereg(dvb, 0x0c, (power ? 0x40 : 0)|(voltage ? 0x10 : 0));
> 
> 
> After this all other channels should no longer work.
> Please tell me if you "problem channel" now works. 
> 
> 
> I also asked before on this list which satellite (not C band, I cannot
> receive that) in Europe sends with spectral inversion so that 
> I can test this and build an automatic switch into the driver. Anyone?
> 
> 
> Ralph
> 
> 
> 
> -- 
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