Hi, > Am Montag, den 27.04.2009, 19:29 +1000 schrieb Dmitri Belimov: > > Hi All > > > > Step by step. > > > > This is patch for change only range of FM1216ME_MK3. Slow tunning > > is not a big problem. > > > > diff -r b40d628f830d linux/drivers/media/common/tuners/tuner-types.c > > --- a/linux/drivers/media/common/tuners/tuner-types.c Fri > > Apr 24 01:46:41 2009 -0300 +++ > > b/linux/drivers/media/common/tuners/tuner-types.c Tue Apr 28 > > 03:35:42 2009 +1000 @@ -558,8 +558,8 @@ > > static struct tuner_range tuner_fm1216me_mk3_pal_ranges[] = { > > { 16 * 158.00 /*MHz*/, 0x8e, 0x01, }, > > - { 16 * 442.00 /*MHz*/, 0x8e, 0x02, }, > > - { 16 * 999.99 , 0x8e, 0x04, }, > > + { 16 * 441.00 /*MHz*/, 0x8e, 0x02, }, > > + { 16 * 864.00 , 0x8e, 0x04, }, > > }; > > > > static struct tuner_params tuner_fm1216me_mk3_params[] = { > > > > Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov > > <d.belimov@xxxxxxxxx> > > if it does help anything for having all above 441 MHz in UHF ranges. > > Acked-by: Hermann Pitton <hermann-pitton@xxxxxxxx> > > There is simply no known broadcast in that gap on other freq. tables. > > Can you please enlighten us who/what broadcasts there? I don't know. This trick for solve problem with low sensitivity the tuners on end of band. We get it from measuments. > > > > With my best regards, Dmitry. > > > > > Hi Dmitri, > > Cheers, > Hermann With my best regards, Dmitry. > > > Thank you for you responses. > > > > > > Just a few more comments... > > > > > > On Thu, 2009-04-23 at 20:36 +1000, Dmitri Belimov wrote: > > > > Hi Andy > > > > > > > > > Dmitri, > > > > > > > > > > > > > > > On Wed, 2009-04-22 at 17:48 +1000, Dmitri Belimov wrote: > > > > > > Hi All > > > > > > > > > > > > 1. Change middle band. In the end of the middle band the > > > > > > sensitivity of receiver not good. If we switch to higher > > > > > > band, sensitivity more better. Hardware trick. > > > > > > > > > > > > Several years a go your customers write some messages about bad > > > > quality of TV if frequency of TV is the end of band. It can be > > > > low band or middle. Our hardware engeneer make some tests with > > > > hardware TV generator and our TV tuners. > > > > > > > > If we set default frequency range for low and middle band, > > > > quality of TV signal on 159MHz and 442 MHz is bad. When we make > > > > our changes with moving end of bands the quality of TV much > > > > better. And our system programmer for OS Windows use changed > > > > bands for drivers. Customers be happy. > > > > > > OK. A properly run experiment wins over theory every time. :) > > > > > > > > > > > > > You can test it if in your placement available TV programm on > > > > 159MHz or 442MHz. This trick can be usefull for other tuners. > > > > > > If you look at tveeprom.c, a number of other tuners are using that > > > tuner definition: > > > > > > $ grep FM1216ME_MK3 tveeprom.c > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips FQ1216ME > > > MK3"}, { TUNER_PHILIPS_FM1216ME_MK3, "Philips FM1216 ME > > > MK3"}, { TUNER_PHILIPS_FM1216ME_MK3, "LG S001D MK3"}, > > > { TUNER_PHILIPS_FM1216ME_MK3, "LG S701D MK3"}, > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips FQ1216LME > > > MK3"}, { TUNER_PHILIPS_FM1216ME_MK3, "TCL MFPE05 2"}, > > > { TUNER_PHILIPS_FM1216ME_MK3, "TCL MPE05-2"}, > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips FM1216ME > > > MK5"}, > > > > > > If your change makes things bad for the other tuners, we'll > > > probably have to create an alternate entry for the other tuners > > > instead of using the FM1216ME_MK3 defintion. I suspect most of > > > them are clones of the FM1216ME MK3 however, so it probably won't > > > matter. > > > > > > > > > 3. Set charge pump bit > > > > > > > > > > This will improve the time to initially tune to a frequency, > > > > > but will likely add some noise as the PLL continues to > > > > > maintain lock on the signal. If there is no way to turn off > > > > > the CP after the lock bit is set in the tuner, it's probably > > > > > better to leave it off for lower noise and just live with > > > > > slower tuning. > > > > > > > > We discuss with our windows system programmer about it. He sad > > > > that in analog TV mode noise from PLL don't give any problem. > > > > > > I would be concerned about phase noise affecting the colors or > > > any FM sound carriers. If the noise isn't noticably affecting > > > colors to the human eye (do color bars look OK?), or sound to the > > > human ear, then OK. > > > > > > > > > > But in digital TV mode > > > > noise from PLL decreased BER. > > > > > > I thought the FM1216ME MK3 was an analog only tuner. I guess I > > > don't know DVB-T or cable in Europe well enough. > > > > > > > > > > > Leaving the CP bit set should be especially noticable ad FM > > > > > noise when set to tune to FM radio stations. From the > > > > > FM1236ME_MK3 datasheet: "It is recommended to set CP=0 in the > > > > > FM mode at all times." But the VHF low band control byte is > > > > > also used when setting FM radio (AFAICT with a quick look at > > > > > the code.) > > > > > > > > Yes. You are right. We can swith CP off in FM mode. > > > > > > OK. Thank you. > > > > > > > With my best regards, Dmitry. > > > > > > > > > Regards, > > > Andy > > > > > > > > > > -- 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