HELP...went to a service call last nite for no pitcher...customer has one rca drd 486 ird plus cable...wants cable and sat on four tv's...running system through a channel plus 3015...cable is clear on all channels...sat is set up to run on channel 80 and is fuzzy...hooked sat up to tv without 3015 and it cleans up the pitcher.....called channel plus and was told i needed a lpf 600[low pressure filter]on the cable input into the 3015..any help with this would be super...thanx....