As usual , Electron provides way more practical and useful information. For reliable and dependable digital tv channel reception. Install a Winegard HD7696P antenna above the roof aimed at 200 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing,html. Here are some antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html. Here are some places to buy antennas and etc. ,
http://www.winegarddirect.com ,
http://www.solidsignal.com ,
http://www.amazon.com. Use new RG-6 coax cable on the outside.