For reception of the Digital Tv stations/channels to the , south west , south , south east.
The Networks you have listed and many more digital Tv stations/channel will be received.
Above the roof , Install a Winegard HD7696P antenna with a Winegard AP8700 preamp , aimed at about 190 degree magnetic compass direction.
For 1 Tv connected use no splitter.
For 2 Tv's connected use a HFS-2D , 2 way splitter.
For 3 Tv's connected use a HFS-3D , 3 way splitter.
Buy HFS splitters at.
http://www.hollandelectronics.com , also at ,
http://www.solidsignal.com.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some Strong and Sturdy 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 some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com.
The Tv/s Must Channel Scan for the Digital 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.
As always , trees and tree leaves do a real fine job of , reducing or blocking Tv reception and so do buildings and other obstructions.
Mount the antenna at a location that has the least amount or no amount of obstructions.