[linux-dvb] Re: DST & Twinhan-Card

[Manu Abraham <manu@kromtek.com>]

On Wed November 17 2004 8:47 am, Craig Read wrote:
> Stefan Schenk wrote:
> >This might be also of interest for the list
> >
> >I was playing around with the values Jamie was talking about ...
> >without success.
> >There must be some other differences between DVB-T in Australia and
> >Germany ....
> >
> >Stefan
> >
> >-----Ursprüngliche Nachricht-----
> >Von: Jamie Honan [mailto:jhonan@optushome.com.au]
> >Gesendet: Sonntag, 14. November 2004 23:38
> >An: Stefan Schenk
> >Betreff: Re: DST & Twinhan-Card
> >
> >On Sun, Nov 14, 2004 at 12:14:37PM +0100, Stefan Schenk wrote:
> >>Hello Jamie,
> >>
> >>
> >>   as i saw on the dvb-mailing-list you did a lot of great work,
> >>making the Twinhan-cards working under linux. I have a very strange
> >>problem here. I use a DVB-T card from the german company HAMA which is
> >>
> >>
> >>said to be a 100% clone of Twinhans VisionDTV. I can load the drivers
> >>and everything looks perfect. The problem is, that i get a very bad
> >>signal in (vdr's femon-plugin shows someting between 15% and 30%) and
> >>therefore the picture is very very bad.
> >>When i start the card with the same antenna in the same room under
> >>windows i get a full signal and a perfect picture.
> >>
> >>Do you have any idee whats wrong with my system or my card ?
> >>
> >>Thanks a lot
>
> I have exactly the same problem on my Twinhan VisionDTV here in
> Australia.  The MythTV setup program reports ~23% signal strength, I get
> 2/5 channels ok (ABC and SBS), but everything else is totally
> unwatchable.  The same card works reasonably under Windoze (>80% signal
The signal strength indicator is just a gimmick, it has nothing to do with the 
actual signal strength, i believe.

What are the values you see when you *zap ?

Manu
> strength, HDTV is unwatchable and channel 10 gets a glitch every minute
> or so).  This is running under Knoppmyth with the 2.4 kernel.  I also
> have a Teac STB which works well on all channels (but not enough singnal
> for HDTV).  I'm about to try loading Suse 9.1 on a fresh drive with 2.4
> kernel and a fresh CVS checkout of the dvb drivers.  If that doesn't
> work, I'll sell the Twinhan card on ebay and buy a DVico FusionHDTV
> (unless somebody suggests a better DVB-T card).
>
> >Hmm. Everything looks good as far as module loading goes.
> >
> >I guess there's a lot more undocumented registers etc.
> >
> >One thing you could try, the guy who got it going was in Australia,
> >which has 7Mhz bandwidth. You are either 8 or 6. Most apps try
> >BANDWIDTH_AUTO, which I notice sets 7 MHz.
> >
> >You could try playing round with this in the code.
> >I haven't a copy of the latest versions but look for code
> >like this:
> >
> >                case BANDWIDTH_6_MHZ:
> >                        val[6] = 6;
> >                        break;
> >
> >
> >                case BANDWIDTH_7_MHZ:
> >                case BANDWIDTH_AUTO:
> >                        val[6] = 7;
> >                        break;
> >
> >
> >                case BANDWIDTH_8_MHZ:
> >                        val[6] = 8;
> >                        break;
> >
> >and try moving BANDWIDTH_AUTO to 8Mhz.
> >(actually I see two spots)
> >
> >You might also try 0 for Auto and see what happens.
> >
> >Let me or the list know.
> >Jamie