Re: Best brand coax and F connector for HD cable?

[egrumling1@xxxxxxxxxxx]

There may be several reasons the HD feed is having problems:

1) The channel displayed on the box (IE: channel 6) may actually map to
another channel, likely a HD feed of the same channel.

2) The HD feeds are at a much higher frequency than any of the other
channels (likely)

3) The HD feed uses a 256 QAM signal. The normal digital channels are
on a 64 QAM signal. The 256 QAM is much more sensitive to noise and
impedance mismatches. Noise can come from many sorces, but ususally
there just isn't enough signal to get above the noise floor. Impedance
is how much "resistance" there is in the cable, measured in Ohms. TV
cable is 75 Ohms, but improperly installed connectors, moisture in the
dialectric (white plastic), kinks and staples, and of course those junk
splitters, can all change the impedance. Again, the 64QAM and analog TV
are much less suceptable to missmatches (although analog tv can get
gosting), but 256 can get picky.