On Wed, 2012-04-18 at 09:22 -0300, Gonzalo de la Vega wrote: > The tunner IF for PAL-Nc norm, which AFAIK is used only in Argentina, was > being defined as equal to PAL-M but it is not. It actually uses the same > video IF as PAL-BG (and unlike PAL-M) but the audio is at 4.5MHz (same as > PAL-M). A separate structure member was added for PAL-Nc. > > Signed-off-by: Gonzalo A. de la Vega <gadelav...@gmail.com>
Hmmm. The Video IF for N systems is 45.75 MHz according to this popular book (see page 29 of the PDF): http://www.deetc.isel.ipl.pt/Analisedesinai/sm/downloads/doc/ch08.pdf The Video IF is really determined by the IF SAW filter used in your tuner assembly, and how the tuner data sheet says to program the mixer/oscillator chip to mix down from RF to IF. What model analog tuner assembly are you using? It could be that the linux tuner-simple module is setting up the mixer/oscillator chip wrong. Regards, Andy > > diff --git a/drivers/media/common/tuners/tda9887.c > b/drivers/media/common/tuners/tda9887.c > index cdb645d..b560b5d 100644 > --- a/drivers/media/common/tuners/tda9887.c > +++ b/drivers/media/common/tuners/tda9887.c > @@ -168,8 +168,8 @@ static struct tvnorm tvnorms[] = { > cAudioIF_6_5 | > cVideoIF_38_90 ), > },{ > - .std = V4L2_STD_PAL_M | V4L2_STD_PAL_Nc, > - .name = "PAL-M/Nc", > + .std = V4L2_STD_PAL_M, > + .name = "PAL-M", > .b = ( cNegativeFmTV | > cQSS ), > .c = ( cDeemphasisON | > @@ -179,6 +179,17 @@ static struct tvnorm tvnorms[] = { > cAudioIF_4_5 | > cVideoIF_45_75 ), > },{ > + .std = V4L2_STD_PAL_Nc, > + .name = "PAL-Nc", > + .b = ( cNegativeFmTV | > + cQSS ), > + .c = ( cDeemphasisON | > + cDeemphasis75 | > + cTopDefault), > + .e = ( cGating_36 | > + cAudioIF_4_5 | > + cVideoIF_38_90 ), > + },{ > .std = V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H, > .name = "SECAM-BGH", > .b = ( cNegativeFmTV | > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
