For reception of the main group of Digital Tv stations/channels to the south.
Install a Winegard HD7698P antenna aimed at about 180 degree magnetic compass direction.
For 1 Tv connection use no splitter.
For 2 Tv's connected use a simple common 2 way splitter.
For 3 or 4 Tv's connected use a Channel Master CM3414 distribution amplifier.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some roof top antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com ,
http://www.channelmasterstore.com.
As always , trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions.
The Tv Must channel Scan for the Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.