Hi dvstahl,
When I first started, I had my Pansat slaved to an analog receiver. The analog controlled the dish movement and polarity. I then manufactured an A/B switch very carefully to allow me to switch between the two receivers for control of the polarity. (Don't try this unless you know what you are doing!! Can fry the polarity controller on either receiver.)
I then bought a VBox II positioner which allowed the Pansat to control dish movement by sending voltage that the VBox II undersood through the coax and translated that to 36V that the big dish could understand.
After that the Pansat controlled dish movement and polarity except when switching to the analog for polarity on using it.
Now I have a 4DTV with it's own dish controlling polarity and dish movement, and the Pansat on it's own dish doing the same.
This is a great hobby, and ever expanding for most of us. If I had known then what I now Know, I might have changed some things and done them differently.
Read some of my threads from last summer and fall. I fried my share of DiSEqC switches and single power passing Hi-Freq switches.
Hind sight is always 20/20.
The best investment I ever made though was in the Pansat 3500SD. It has been good for all kinds of dish setups, and along with the VBox II (second best investment) it can do about anything you might want to do. I now own two of them along with a Coolsat 5000.