[linux-dvb] DVB-C & QAM256 problem

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Hello !

I have try that ........... Now, I have picture and sound ....

But an other problem ;)

The picture and sound are very bad !!!! like you receive a bad signal
and card could not decode perfectly (many numeric error)....
I have do a test under Windows (with original software) and picture and
sound are perfect...

Have you a soluce for me ???

Thanks a lot ! :)

J-D.

>Hello,
>
>You probably should increase timeouts in the stv0297 frontend driver.
>Something like this works fine for QAM128 with my C2300 card:
>
>--- stv0297.c   2005-04-20 19:29:21.122342784 +0300
>+++ /root/dvb-kernel/linux/drivers/media/dvb/frontends/stv0297.c
>2005-04-05 03:30:39.000000000 +0300
>@@ -617,7 +617,7 @@
>
>       /* wait for WGAGC lock */
>       starttime = jiffies;
>-       timeout = jiffies + (200 * HZ) / 1000;
>+       timeout = jiffies + (2000 * HZ) / 1000; 
>       while (time_before(jiffies, timeout)) {
>               msleep(10);
>               if (stv0297_readreg(state, 0x43) & 0x08)
>@@ -629,7 +629,7 @@
>       msleep(20);
>
>       /* wait for equaliser partial convergence */
>-       timeout = jiffies + (50 * HZ) / 1000;
>+       timeout = jiffies + (500 * HZ) / 1000;
>       while (time_before(jiffies, timeout)) {
>               msleep(10);
>--8<--
>
>You shouldn't be scared of tenfold increase in timeout loops as the
loop
>will exit as soon as the signal has been locked. For my case, the C2300
>card normally tunes almost as fast as the older rev 2.1 card I own. 
>
>Best regards,
>Mikko.
>
>> Hi !
>>
>> First sorry for my bad english ... normally I speak french :)
>>
>> I have a problem:
>>
>> I have a DVB-C Card (Hauppaugge Nexus-CA rev 1.1 - SAA7146 - STV0297,
>> same
>> as TT Premium DVB-C 2300).
>>
>> I use vdr 1.3.24 - kernel 2.6.11.
>>
>> My cable-operator send Digital TV signals with QAM64 & QAM256.
>>
>> Picture & sound are fine when I tune to QAM64 channels, but picture
stay
>>
>> black and I have no sound when I tune to QAM256...
>>
>> I have found on an other forum a similar trouble with QAM128.
>>
>> Could you help me ?
>>
>> thanks.
>>
>> J-D
>>
>>
>>
>>
>> _______________________________________________
>> 
>> linux-dvb@xxxxxxxxxxx
>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>






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