I'm looking into replacing my satellite dish with an OTA antenna and hopefully using the existing cables. My Direct TV set up has two cables running from the dish to a splitter box outside the house (one splitter input marked 18V, one 13V) and then cables running from the box to each TV. My question is can I just swap in the OTA antenna for the dish (connecting either the 18V or 13V cable to the antenna) with the splitter box continuing to do its thing?