WE have 4 tvs and 1 922. 3 of the sets are cabled to TV2 and since there are only 2 of us in the house it works for our needs. If we go to the Hopper only one of the of the 3 tvs is HD and the other 2 are presently older sets. Will I need a Joey at each set even though I only want SD at 2 of the sets or will there be a way to split the signal as I am now doing?