Hello. I am looking to hook up 2 dvr's from DTV. I currently have 4 sat recievers in my house. My dish is an oval dish with 2 LNB's. I understand that you need 2 hook ups to plug into the back of the DVR. If I use a multi-switch,is it a 1 to 2 ratio. Do I use one coaxl hook up in the muti switch and come out with 2. Or is it something else. Does anyone have the specs on this.