I have an HVR-1600 that can't find three clear QAM channels. Using information from silicondust.com, I think these channels are on frequencies 543000000 and 549000000 (analog cable 77 & 78). I can see these channels on HDTVs in other rooms of my home. And the HVR-1600 can tune 8 clear QAM channels on 5 different frequencies:
three on 93, 639000000
one on 94, 645000000
two on 102, 663000000
one on 106, 687000000
one on 118, 759000000 (although this one is video on demand and is noisy)
So I guess I'm wondering if you can offer any insight as to why I'm having trouble with frequencies 543000000 and 549000000. Could it be a clue as to whether the problem is the coax cabling leading to the HVR-1600, an issue with the PCI bus, or just the fact that a PCI card doesn't have the shielding an HDTV has?
FWIW, I have yet to try connecting one of my HDTVs to the same coax input. However, I did try connecting the HVR-1600 to the same input used by my cable modem back in March/April (should be cleanest coax connection in my house) and MythTV's scanner couldn't find these three channels there. It's been so long, I don't remember if I tried the scan utility with that connection. My focus at the time was an issue with audio noise on some analog channels (which Andy was able to fix, Many Thanks).
TIA,
Helen
P.S. Thought Devin would like to know his recent cx18 fixes have improved signal quality on the clear QAM channels I can tune. Tuning 7 channels for about 23 seconds each and playing with mplayer 3 seconds after tuning (excluding video on demand), I found that:
- Signal strength reported by azap increased from an average of 12c to 13F
- Reports of non-zero BERs and/or UNCs dropped from 6 in 147 samples to 1 in 147 samples
- mplayer reports of 'a52: CRC check failed!' dropped from 24 to 2
Subjectively, the audio and video quality is better. And MythTV seems much happier as it's less likely to dump core playing back recordings from two of these channels.
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three on 93, 639000000
one on 94, 645000000
two on 102, 663000000
one on 106, 687000000
one on 118, 759000000 (although this one is video on demand and is noisy)
So I guess I'm wondering if you can offer any insight as to why I'm having trouble with frequencies 543000000 and 549000000. Could it be a clue as to whether the problem is the coax cabling leading to the HVR-1600, an issue with the PCI bus, or just the fact that a PCI card doesn't have the shielding an HDTV has?
FWIW, I have yet to try connecting one of my HDTVs to the same coax input. However, I did try connecting the HVR-1600 to the same input used by my cable modem back in March/April (should be cleanest coax connection in my house) and MythTV's scanner couldn't find these three channels there. It's been so long, I don't remember if I tried the scan utility with that connection. My focus at the time was an issue with audio noise on some analog channels (which Andy was able to fix, Many Thanks).
TIA,
Helen
P.S. Thought Devin would like to know his recent cx18 fixes have improved signal quality on the clear QAM channels I can tune. Tuning 7 channels for about 23 seconds each and playing with mplayer 3 seconds after tuning (excluding video on demand), I found that:
- Signal strength reported by azap increased from an average of 12c to 13F
- Reports of non-zero BERs and/or UNCs dropped from 6 in 147 samples to 1 in 147 samples
- mplayer reports of 'a52: CRC check failed!' dropped from 24 to 2
Subjectively, the audio and video quality is better. And MythTV seems much happier as it's less likely to dump core playing back recordings from two of these channels.
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ivtv-users mailing list
ivtv-users@ivtvdriver.org
http://ivtvdriver.org/mailman/listinfo/ivtv-users