I've been struggling with this problem for over a month. I have 2 rca directv 18" dishs, each with dual lnb's. I have one pointed at 110 and one at 119. I connected 5' of rg6 cable from each to a sw21 switch. I connected 30' of rg6 cable to the sw21 and to my 7100 receiver. I get it to see a...