I am trying to install a 1000.4 in Park Ridge, Illinois. Calls for Skew of 74, Elevation of 39 and Azimuth of 158. Going back and forth, I have picked up 77 and 72 but I believe I have been at the wrong LNB eyes. When I get 77, I am on the Eastern Most Eye but then I do not receive anything else. Should 77 be picked up on the eastern eye or the western eye.