If you have a triple LNB dish ,it already has a
multiswitch built in.You need to get a 4x8 multiswitch.All 4 LNB outputs need to be run to all 4 inputs on the multiswitch,Then you will have 8 outputs to connect to up to 8
satellite receivers.That would be enough to run up to 4 TIVO units using both Sat 1 and Sat 2 inputs.The switch does require a coax feed to power it from a 110 volt outlet.