Alot of people like to run two receivers at one time with the Viewsat receiver. You can run the Platinum and the Ultra at the same time if it is done correctly. Alot of times you will encounter problems if you do not pay attention to fine details. If you begin experiencing problems when both receivers are on when you begin flipping through the channels. You might want to try ground the antenna and see if this works or some of these other solutions by clicking here.