flashback said:
we are having an freezing rain storm here now and most of my digital channels wont come in without interfearence.say what you will about how much beter it looks it doesn`t help much if the signal won`t come in right.this kind of weather did not effect analog.
We had light freezing rain here last night, and I had some difficulty getting KOMU 8, which is on DT-8. I live about 20 miles from the tower, and I was eventually able to decode it. I had to do some acrobatics with my rabbit ears, though!
I got to wondering if KOMU had some of the same problems we had at some of the various radio stations I've worked at. AM antennas become detuned when coated with ice. FM bays start having problems with power getting reflected back to the transmitter if too much ice builds up on them. If the station runs an older transmitter, reflected power not only ramps up the plate current but can burn the filaments. If that happens, you'll need major repairs to get back on the air. So, the solution is to frequently check your transmitter readings and cut power if you notice a substantial jump in plate current. Some transmitters also give you the ability to check for reflected power, and you cut power if the reflected power gets too high.
Of course, when you cut power, you can start getting complaints from listeners further away who can no longer hear your signal as well. Since this is less of a problem with solid-state transmitters, I didn't figure it would be much of a problems with digital TV. I started to wonder after last night, though.