Re: Technotrend C1500 budget dvb-c with QAM128 channels

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Simo Kivimäki wrote:

Mattias Nordstrom wrote:

I have a TT C1500 card (saa7146, STV0297) which had problems tuning
channels at QAM128 (like the ones in the Finnish HTV / Welho network).

A fix which seems to work perfectly so far is to change the delay for
QAM128 to the same values as for QAM256 in stv0297_set_frontend(),
stv0297.c (line ~395, kernel 2.6.15):

case QAM_128:
    delay = 200;
    sweeprate = 500;
    break;

Anyone who can view QAM64 channels but isn't able to tune in to QAM128
might want to give this a try.

That works fine for me too. Thanks.

Someone could put that to the cvs.

It looks to me like the attached patch achieves the desired effect, although I know little of the stv0297 driver, and even less about the TT 1500 card.

Mattias, even though I generated this patch (just for the sake of moving things along), would you care to sign-off on it?

Does anybody have a problem with this change at all?

diff -r dc34f5271cc1 linux/drivers/media/dvb/frontends/stv0297.c
--- a/linux/drivers/media/dvb/frontends/stv0297.c	Tue Feb 21 03:31:12 2006
+++ b/linux/drivers/media/dvb/frontends/stv0297.c	Tue Feb 21 13:16:25 2006
@@ -393,10 +393,6 @@
 		break;
 
 	case QAM_128:
-		delay = 150;
-		sweeprate = 1000;
-		break;
-
 	case QAM_256:
 		delay = 200;
 		sweeprate = 500;
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