hi folks, I'm new to this hobby and am struggling to allign my dish I have recently purchased a 80cm dish and a inverto duel lnb, I can get all the 19.2 channels fine but nothing off hotbird, the question is, I am wondering if I have a faulty lnb as if i cover the half up that is receiving 19.2 then swap the lnb over into the holder the other side I do not receive a thing, would this be the best way to test or am i barking up the wrong tree. any advise would be welcome cheers