[linux-dvb] Re: Using NOVA-t in the UK

[Dave Chapman <dave@dchapman.com>]

Yes, using a patch provided by Marko, I have managed to get a complete lock 
(0x7f in register 0x32) on all the DVB-T multiplexes broadcast in my area (6 
of them).  The card correctly refuses to tune to other frequencies, so I know 
that the card is doing something right.

I also have a "real" UK DVB-T receiver, and this receives all the channels 
without problems, so I know my aerial installation is OK.

I am also monitoring the value of the CSI_AVERAGE register (0x33) on the 
L64781, and this gives a value in the range of about 0x35 to 0x3c after 
locking onto a channel (0xff when it isn't locked).  I know that the lower 
the value in this register, the better, but I don't know if 0x35 is good 
enough.

My question now is to the driver developers - should the driver be delivering 
a transport stream?  By writing extra log information, I can see that the 
driver is setting and starting the filters, but the contents of the grabbing 
buffer remain at 0.

For those that are interested, I have started a web page detailing the 
technical information I have collected recently.  It's at:

http://www.linuxstb.org/dvb-t/

Regards,

Dave Chapman.

On Monday 15 October 2001 09:08, Marko Kohtala wrote:
> ext Ralph Metzler wrote:
> > Sorry, if they really use the Bt878 as PCI bridge now our driver does
> > not support this. Gerd Knorr wrote some extensions to my old Bt848/878
>
> The Hauppauge NOVA-t uses the SAA7146.
>
> I just got last weekend it tuned to a station in Finland. I also heard
> Dave Chapman got it tuned in UK with patches I made.
>
> I am not sure what made it work. Maybe it was the change to make it
> write value 0xa5 to register 0x3e (power-down register) rather than the
> value 0 that it writes in the version I got from linuxtv.org CVS.
>
> I still have plenty of problems with it. Where I am, there are three
> channels in use: 32, 44, and 46. I do not get a lock on channels 44 and
> 46. I suspect the card receives a lot of interference from the PC. When
> I connect an analog TV to the same antenna, I see a lot of noise on some
> channels when the NOVA-t is connected to the same antenna.


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