I don't understand this. For your plasma TV, you would need some number if
inputs and 1 output for the TV. Maybe you have a passive device for which the signal direction does not matter? I make a habit of buying those automatic switchers which switch to the active input as soon as you turn one on. Of course that may or may not work if one of the devices is always on (such as Dish receivers). I find my automatic switchers still work on my Dish receiver, as long as the other devices really do turn off. The TVs I have FireTV Sticks on, I have to occupy the 2nd HDMI input on the TV and switch with the TV. PITA! Why don't these devices ever turn off? Don't answer that; I know their excuse.