I am trying to set up my first FTA dish and I live in NE Texas. I have 30" dish with a Manhattan RC-1978 receiver and a orbital Tracker single KU LNBF. I know I got the elevation right and I think I got the azimuth right also. All I am able to receive is 55 scrambled channels. I do not know what I am doing wrong... Please help me figure out how to get it to work.