ok...i have a muti-switch down stairs (2x4) with a dsr6000 with duel tuners enabled(sat is a normal duel LNB) plus one 5 gen IRD upstairs. now the question is this:
can i use a diplexer to combine LNB A and LNB B so it can go through the one cable to upstairs then use a 2nd one (diplexer) to seperate the signals if i choose to put another dsr6000 upstairs or do i have to run a second line??

thanks!
quantum