Hi, Am Dienstag, den 26.05.2009, 22:03 -0400 schrieb Andy Walls: > On Wed, 2009-05-27 at 02:15 +0200, hermann pitton wrote: > > Hi, > > > > Am Dienstag, den 26.05.2009, 22:21 +0200 schrieb Martin Dauskardt: > > > I should add that the picture quality is with all tested tuner types worse > > > than with my PVR250/350. I don't know if a PVR150 is in generally worse than > > > a PVR250. I can't call it really noisy, but in german I would say the picture > > > is a little bit "grobkörnig". It really needs a temporal filter setting of > > > value 8 or more, while my other PVR cards have a nice quality even with value > > > 0. > > > > > > I will test whatever you guys want me to test :-) But I am not a programmer, > > > so I need detailled instructions what to patch. > > > > > > My next step will be testing an older v4l2 with an 2.6.27 kernel to see if the > > > audio problem still exists. > > > > Martin, that seems the right way to start and there is no need to hurry. > > > > If nobody has a datasheet, and I can imagine that such an early RF loop > > through tuner has some specials, you are still in a difficult testing > > field, even if only on PAL BG for now. Is RF out is active would be > > still interesting to know. > > Hermann, > > There is an FQ1216LME MK3 data sheet here: > > http://dl.ivtvdriver.org/datasheets/tuners/FQ1216LME%20Mk3.pdf Something for the weekend I guess. > Is it safe to assume that the MK5 is not very different from the MK3? That is what we always did and did not fail so far. That Chinese SAW filters cause my concern and Dmitry might have them even on a MK5. Needs Philips/NXP confirmation I think. > I can build an entry for the FQ1216LME based on this datasheet (maybe on > Friday night) and hope it works well enough for the MK5. > > Regards, > Andy Best to proceed for now and then testing on PAL_BG as a start. Cheers, Hermann > > > If on the same RF signal quality, means no more passive RF splitter in > > between, I don't know what we can expect, but for example the FM1216ME > > and the FMD1216ME hybrid MK3s do perform excellent and don't have this > > "grobkörnige" (grainy?) picture, which you often see on cheaper tuners. > > > > As far as I know, not any such complaints about the MK4s so far too. > > > > Dmitry has some MK3 variant, where the first time on a Philips tuner > > Chinese SAW filters are employed instead of the original EPCOS filters. > > > > The question, if that could cause performance/sensitivity losses, is not > > yet answered. Also if this is related to the SECAM DK tweaks he needs. > > > > I would start testing for different sound quality between tuner 56 and > > 38. Beginning silence on old B/W mono broadcasts could make a difference > > I somehow have in mind. > > > > If 56 still has no sound at all, that should indicate a major technical > > change compared to prior tuners. > > > > Cheers, > > Hermann > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
