A simple reception situation.
Many Digital Broadcast Tv Channels will be received.
Above the roof install a Winegard HD7696P antenna aimed at about 185 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Install the antenna above the roof in such a manner that the roof or the house is not restricting or blocking reception in the the directions of , south and north west.
Install a Antennas Direct CPA-19 preamp.
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For one 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.
For 4 Tv's connected use a , HFS-4D , 4 way splitter.
Buy the HFS splitters at ,
http://www.solidsignal.com , or ,
http://www.holladelectronics.com.
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Here are some above the roof 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.
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Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.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 including your own house.
As always , it is best install the antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own house.
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 the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.