If you have the winegard for Directv, you should look for a SWM box. The SWM box needs AC power. The dish coax cable connects to the SWM box, from the SWM box you will have a coax cable that you will connect to your sat 1 input.
The SWM box looks like a power converter, black box, approx 4 or 5 inches long, it will have an AC power cord along with the RF coax connections. For me it is located in the same compartment that the Winegard control box is.