My dish is mounted on the side of my garage. We don't watch much TV so I sent for my coupons for a digital converter box and purchased an antenna. I would like to remove the dish, use the side mount to set up the antenna, and use the existing cable. I noticed that there is a dual line going from the dish into the house. Just please explain what I need to do. Do I remove all the existing coax cable and replace it with a single line or what? Will I be able to remove the dish and leave the mount?