Im also using the Marantz 2000 and have been able to learn everything I want except the SAT source key. It just wont accept this key which gives me instant input to Satelite. I can punch DVD, AMP (for the the 950), Tuner etc. and it will take me directly to that device by depressing the source key twice. But, when I punch SAT twice it will not put this input on the screen. It will control my DTC 100 and do all coomands on each of the 4 screens, but, IT WILL NOT COMMUNICATE THIS COMMAND TO THE 950! Strange! Anyone else experienced this??