Hi... I am building my own system and intend to only use three of the four outputs from the multiswitch on a Phase III antenna... I do intend, however, to run cables from all four outputs to the place where I will set up my grounding blocks, where the cables enter the house from the dish... What needs to happens to unused outputs??? Do they need to be terminated in 75 ohms?? Left open?? If left open, does it matter that an unused output has say 20 feet of RG6 cable hanging on it before it comes to an open at the grounding block??? Bottom line is what needs to be done with unused outputs so that the used outputs don't suffer any signal problems??? thanks... diitto...