I was using, an 18" round dish, with a Ku LNB, a PM 900 motor and a Pansat 2700 A, which worked very well. To try to get better reception from some birds and to elimate weather fading, I switched to a Fortec 90cm offset with a standard LNB. Now, I cannot find any signal. Level stays around 74, but I cannot pickup ANY signal at all. How is this dish "offset"? I just thought the LNB was offset. Is it more to it than that? What might I be doing wrong?