[linux-dvb] Re: Full featured card summary

[Andrew de Quincey <adq_dvb@lidskialf.net>]

On Saturday 13 March 2004 15:32, you wrote:
> On Saturday 13 March 2004 15:00, you wrote:
> > Andrew de Quincey wrote:
> > > OK, this is getting far too confusing. Need to summarise this:
> > >
> > > We're trying two types of DVB-S-fullfeatured cards: the 1.3 and the 1.6
> > >
> > > The 1.3 works fine with the alps_bsrv2(101) driver
> > > The 1.3 fails with the ves1x93(110) (polarisation switching)
> > > The 1.3 fails with the ves1x93(cvs) (polarisation switching)
> > >
> > > I don't see how the 1.6 can be working with either as it is using a
> > > completely different frontend.
> > >
> > > Klaus, you reported that the 1.3 fails completely for you with
> > > ves1x93(cvs), and that the suggestion by Andreas doesn't help with the
> > > polarization problem. That sounds weird 'cos Helmut says ves1x93(cvs)
> > > only has the polarization problem, not that it fails totally. Can you
> > > try Oliver's suggestion of resetting everything and retry ves1x93(cvs)?
> > >
> > > Is the above correct?
> >
> > Not quite.
> >
> > When I use the driver from yesterday's CVS it works a bit,
> > but switching polarizations doesn't always work.
> >
> > With
> >
> >   0x80, 0x00, 0x31, 0xb0, 0x14, 0x00, 0xDC, 0x20,
> >
> > it is the same as before, and with
> >
> >   0x80, 0x00, 0x21, 0xb0, 0x14, 0x00, 0xDC, 0x00,
>
> OK, in that case it shouldn't be the 0x20/0x00 change; that appears to be
> the voltage setting (0x20==13v, 0x30==18v, 0x00=OFF). So that change was
> just changing the default from 13v to OFF.
>
> As for the 0x21/0x31. I do have the alps bsrv2 datasheet, but they don't go
> into much detail. They recommend 0x21 though and have a comment saying
> (MODE: QPSK/DVB). I don't know why 0x31 is working for you and not 0x21.
>
> Looking at the source, the only other change I can see is to when it sets
> the tuner frequency. The attached patch will disable this change. Note: I
> have _no_ idea what it does; the sheet doesn't go into any details.

I've just spotted another change:
In alps_bsrv2.c/ves1893_set_inversion() (101):
        case INVERSION_AUTO:
                val = 0x40;

in ves1x93.c/ves1x93_set_inversion() (110):
        case INVERSION_AUTO:
                val = 0x00;


Any of you using INVERSION_AUTO?

Theres also some other code when reading the inversion setting back that looks 
wrong.

A ves1893 datasheet would be a great help here :(


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