Originally posted by Michael.Chrisco
Could this be the diplexers causing problems?
Do you guys have a separate cable for antenna or combine and then split?
I am combining signals from three separate antennas (uhf-west, uhf-east, high-vhf-east) and then using diplexers to piggyback the antenna signals on the directv cables. No audio dropouts.
One thing to look for on KMBC-DT dropout problems... back in January, I had a number of dropout problems on KMBC-DT (only). I found them to coincide with the startup and shutdown of my HVAC blower, and with the actuation of the solenoid associated with the water dispenser in my refrigerator. Back then I was using a single Terk TV-55 (bidirectional) antenna. Apparently the frequency range for channel 7 is susceptible to such interference. You may want to look for similar sources in your environment.
After the April SAT-HD200 firmware upgrade, and after changing over to using the 2 uhf and 1 vhf (all preamplied) antennas, the problems went away. Whether this is the result of higher signal strenth, or of the directional antennas not picking up the interference, or something else entirely, I'm not sure.
I initially tried using a line conditioning UPS on the HD receiver and Terk TV-55 preamp to cut out the interference. It didn't have any effect. So I think the interference was being picked up by the antenna OTA...not getting introduced via the AC.