With the assistance of my wife watching the tv, I set up a fixed 33" dish on IA5 at 97 West. (SG2100 motor arrives today, but I couldn't wait!) I was able to get a signal strength and quality of around 80% each. I did a scan on my Fortec Ultra and got around 80 tv channels. After watching for a couple of hours, I returned to my set to find all the channels unwatchable. They now show 92% signal, 0% quality. What could have happened? Did I point the dish at a mirage? What's the meaning of signal? I can get 48% signal by pointing the dish at anything?