Power to Satellite and Switch

I have a 2007 Holiday Rambler Vacationer with a Winegard in-motion dish and a DirectTV receiver. I bought it used, so had to do some experimentation. in mine, the compartment above the driver's location contains the distribution box (selector buttons to route various signals to various destinations), the DirectTV receiver, and a Radio Shack 12 volt power supply. There's a small rocker switch on the driver's side of the main TV enclosure. The Radio Shack power supply seems to provide power to the dish aiming motors; with the power supply turned on, the small rocker switch is enabled, and can be turned on (a green light illuminates inside the switch.) The stepper motors then aim the dish. I can see the signal strength on the setup menu in the DirectTV receiver. I don't use it "in motion" so it's just a convenience to aim the dish when we change locations. Once the dish is aimed, I can turn off the rocker switch and the Radio Shack power supply, and all is still good; the DirectTV receiver can still see the satellite.

I deduce the Radio Shack power supply was added when the Winegard dish was installed, to provide 12 volts DC. Perhaps doing it that way was easier than tracking down a live 12 volt line in the existing harness.

Hope this is helpful.