Sounds like you're getting close to the issue here, and from what i can read it looks like a 'weak' signal issue. It think i would test that further (maybe move the PC if that's possible?)
Good luck
** EDIT **
I just got my TV Card up and running in the HTPC. I've scanned for channels using the new frequencies (i noticed another change on this site so i added a few frequencies. During scanning signal has been 100% all the time.
When i tune to a HD channel, the picture is there withint 2/3 secs and from the start it's synced.
Using PDVD11 codec for TV.
So.... The sync issue i was having before with NED 1, 2 & 3 (didn't have any other HD channels before 1-9) is also gone.
Can't see that the card makes any difference, but it really starts to look like a signal issue on your side.
Good luck
** EDIT **
I just got my TV Card up and running in the HTPC. I've scanned for channels using the new frequencies (i noticed another change on this site so i added a few frequencies. During scanning signal has been 100% all the time.
When i tune to a HD channel, the picture is there withint 2/3 secs and from the start it's synced.
Using PDVD11 codec for TV.
So.... The sync issue i was having before with NED 1, 2 & 3 (didn't have any other HD channels before 1-9) is also gone.
Can't see that the card makes any difference, but it really starts to look like a signal issue on your side.
Netherlands