Above the roof install the ANT751 antenna (no antenna amplifier required) aimed at about 315 degree magnetic compass direction.
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 ,
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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For 1 Tv connected use no splitter.
For 2 Tv's connected use a simple common 2 way splitter.
For 3 Tv's connected use a simple common 3 way splitter.
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Here are some places to buy antennas and etc. ,
http://www.solidsignal.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.