I have a Pansat 2500a rcvr, with a 90 cm fortec dish and stab hh-90 motor, and a Invacom quad lnb with single cables from c output on lnb to rotor, thru to receiver, my zip is 29073(lexington, s.c.). Am getting almost 80 percent on signal level, but zero quality, have not moved my rotor setting...