On Mon, Mar 30, 2009 at 5:37 PM, Dave Johansen <davejohansen@xxxxxxxxx> wrote: > I am trying to get a MythTV setup working with a DViCO FusionHDTV7 > Dual Express using Mythbuntu 8.10 and I have been able to generate a > channels.conf file using the latest v4l-dvb source code and the scan > utility that comes with the dvb-utils in Mythbuntu (the dvbscan > utility in latest dvb-apps source code give me the error "Unable to > query frontend status"). I am also able to watch channels using > mplayer, but the the problem is that MythTV does not identify any > channels. I am able to watch channels using MythTV, but I have to > manually enter the channel data since the tuning is not working. > > The belief is that the signal strength and SNR output must be > incorrect and that is causing the problem with MythTV. I would like to > help get this fixed, so others don't have the problems that I have run > into, so what can I do to help get the signal strength and SNR outputs > working? > > If it's helpful, I have attached an example output using azap with one > of the channels that I can watch with mplayer: > > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' > tuning to 503028615 Hz > video pid 0x0011, audio pid 0x0014 > status 01 | signal e000 | snr e450 | ber 00000000 | unc 00000000 | > status 1f | signal 00ff | snr 00ff | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00ff | snr 00ff | ber 00000ab7 | unc 00000ab7 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK > > Thanks, > Dave That is a great signal reading. 0xfa = 25.0 dB , 0xff = 25.5 dB ... so, you're teetering between 25.0 and 25.5 -- you have a great signal. SNR is reported in 0.1 dB by the driver that your device uses. Ignore what mythtv says about signal status -- userspace cant read kernelspace signal statistics properly yet. Regards, Mike -- 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
