[mythtv-users] OT: HD-3000 QAM working for anyone?

Wed Aug 31 04:19:31 UTC 2005

Well, It was kind of a dry run with spare hardware not totally
suitable to the task.  Plus my interest diminished in pursuing QAM
when it only netted me 1 or 2 channels in the clear that I couldn't
get OTA ... (stupid adelphia *shakes fist* no LOST no MNF in HD for me
via cable!)

I'm no expert but the fact that you don't have a consistent FE lock is
most definitely an important part of the symptom/issue.   It is
possible that the HD-3000 is more sensitive to noise/lower strength
signal than the QAM/ATSC tuner in your TV.  In general with
analog/NTSC cards I've found that to be true *shrug*.

You could try running the cable directly from the wall to your HD-3000
(i.e. no splits/etc) temporarily as a test.  If that improves your
situation you may be a candidate for some sort of high quality RF
amplifier or better grade coax or something... Although it sounds like
you've sorta tried this.   I have no idea if Dvico or other cards are
more or less "sensitive" re: QAM/etc...

My QAM tuner on my LG 30" widescreent CRT pulled in the exact same
channels as the HD-3000.

E.

On 8/31/05, John P Poet <jppoet at gmail.com> wrote:
> On 8/30/05, Erik Pettersen <pettersen at gmail.com> wrote:
> > I had QAM working with my HD-3000 for unencrypted local HD cable channels.
> 
> 
> Had?
> 
> 
> > I assume you're using the dvb drivers?  Do you have a way to determine
> > if the drops are in the recording, and not just symptoms of a
> > system/configuration struggling to playback these large/intense HD
> > files?
> 
> 
> Yes, DVB.  When tuned to a known good channel/frequency, azap produces:
> 
> azap TNTHD
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> tuning to 771000000 Hz
> video pid 0x0010, audio pid 0x0011
> status 00 | signal 70e4 | snr ed9d | ber 00000000 | unc 00000000 |
> status 00 | signal 0d90 | snr fc9d | ber 00000000 | unc 00000000 |
> status 00 | signal 04dc | snr fcf7 | ber 00000000 | unc 00000000 |
> status 1f | signal 0105 | snr fd37 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 00 | signal 0105 | snr fc6d | ber 00000000 | unc 00000000 |
> status 1f | signal 0936 | snr fd13 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0936 | snr fccf | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 04dc | snr fcf9 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 00 | signal 0d90 | snr fc73 | ber 00000000 | unc 00000000 |
> status 1f | signal f603 | snr fcc9 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0105 | snr fc53 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 00 | signal fd2e | snr fc3d | ber 00000000 | unc 00000000 |
> status 00 | signal 0d90 | snr fcc9 | ber 00000000 | unc 00000000 |
> status 00 | signal 04dc | snr fc81 | ber 00000000 | unc 00000000 |
> status 00 | signal 0936 | snr fc7b | ber 00000000 | unc 00000000 |
> status 1f | signal 0936 | snr fcb7 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal fd2e | snr fc71 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal fd2e | snr fc5d | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0936 | snr fc71 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 04dc | snr fc0b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0936 | snr fd09 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0936 | snr fd05 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal fd2e | snr fc63 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0936 | snr fd11 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal fd2e | snr fcb9 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal 0d90 | snr fc97 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 00 | signal 0d90 | snr fd31 | ber 00000000 | unc 00000000 |
> 
> This is with the same piece of coax that normally feeds the QAM tuner
> in my TV.  My TV is able to display this channel without any problem.
> 
> If I hookup my UHF antenna, I get this from azap:
> 
> # azap -c channels-8VSB.conf KNME-HD
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> tuning to 599028615 Hz
> video pid 0x0031, audio pid 0x0034
> status 1f | signal 56c8 | snr eb7f | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal fd2e | snr fc01 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f603 | snr fbf3 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f998 | snr fbbf | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fb6b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f603 | snr fbf3 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal ec8a | snr fbdb | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal ec8a | snr fb8f | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f998 | snr fbf7 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f998 | snr fc0b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fc05 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fbd5 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f603 | snr fbe5 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fc0b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fbef | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fb97 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fb43 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f998 | snr fbf9 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal f2af | snr fc1b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal ef9c | snr fbed | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal ef9c | snr fbdb | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal ef9c | snr fb57 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
> 
> And the picture is perfect.
> 
> > I suggest (for the sake of troubleshooting) recording something
> > without watching it preferrably outside of myth via command line, and
> > playing it back later outside of myth.
> 
> 
> Yup.  Tried that.  Mplayer and Xine both play the resulting file with
> pixelation so bad, it is unwatchable.
> 
> > FWIW I used dvb-apps from http://www.linuxtv.org/cvs.php on a
> > knoppmyth install and found the following links/posts helpful for
> > testing:
> >
> > http://www.xmission.com/~pchdtv/forum/viewtopic.php?t=688
> > http://www.penlug.org/twiki/bin/view/Main/DigitalTelevisionDVB
> 
> I will take a look at those links.
> 
> >
> > E
> > --
> 
> Thanks for responding.  At least I know it is possible.
> 
> John
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