On Thu, October 19, 2006 12:33 pm, Hans Verkuil said: > What sort of problems do you have? If it is noisy, then it is the signal > quality and I suggest you try an amplifier. I have also seen reports of > a 'herringbone' pattern that disappears when the '+4' is removed. The > PAL datasheet has a flowchart that shows when to set the bit (although > I had very confusing test results and it is not implemented at the > moment). No such chart is present in the NTSC datasheet, but perhaps a > similar thing is needed. However, the test for that is easy: remove > the '+4' and if that doesn't improve things, then you can be sure that > the tuner code is correct.
Hmmm... I added the "+4" because without it one of the tuners barely worked at all - just static. I think it was tuner 1. I had the herringbone/crosshatching in the upper channels before I added the +4 and it's still there. Right now, on channel 19 (151.25MHz) tuner 1 has loads of static - picture is barely discernable, but on the same channel, tuner 2 is near perfect. Nearby channels (17, 18, 20, 21), are all near perfect on both tuners. On the channels in the 40's (above 300MHz), tuner 1 has mild crosshatching and tuner 2 has strong crosshatching, so in that range, I'd say tuner 1 is better. I'm going to play with various combinations of the "+4" in the different frequency ranges to see what effect that has. -Eric _______________________________________________ ivtv-devel mailing list ivtv-devel@ivtvdriver.org http://ivtvdriver.org/mailman/listinfo/ivtv-devel
