When I installed my SENSAR pro I put in a direct RG-6 cable from it's output #2 to the converter in the rear... This is then split between the converter and ONE of the TV's in the rear (Rear converter is an Insignia, which is a Zenith, which is an LG, and thus does not work properly by the way, NO LB product I've ever owned worked properly without modification.. in the case of the Insignia converter, Cycling power fixes it, or frequent channel changes).
Thus it gets like 4x the signal it would get if I ran it through the switch box The reason is not the switch box (though that does add to the loss) its the lowest bidder RG-59.