Not in this instance, no switch is needed in this setup. You only need a line from the 500 dish going to the 1000.4 "lnb in" port. (Or vice-versa.) From there a single line from the dish to the receiver. Two if you don't have a DPP Separator. You only need a switch if you have more than 3 tuners. (You have more outputs if you plug the 500 into the 1000.4)