Hi I am a noob to Tivo. I just had mine hooked up on Saturday and I love it. The only thing I don't have is the dual tuner. I bought a Satellite Splitter from RadioShack but it only worked partly. If I watched a channel on the same transponder as the other tuner, the channel wouldn't work. My question is what do I need that will make the Dual Tuner work? I have for TV's hooked to the dish. My LNB only has 4 slots and they are all used up. Thanks.