A Simple reception situation.
Many , many , many , many , Strong Digital Tv stations/channels.
Above the roof install and aim a ANT751 antenna at about 23 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
For 1 Tv connected use no amplifier or splitter.
For 2 Tv's connected use a common simple 2 way splitter.
For 3 or 4 Tv's connected use a CM3414 distribution amplifier.
Here are some places to buy antennas and etc. , Solidsignal has a ANT751 and J mount antenna mount package , low dollars.
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.channelmasterstore.com.
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The ANT751 does have some forward gain so the antenna is aimed in the direction of the weakest Tv station/channel at about 23 degree magnetic compass .
The ANT751 is not a very directional antenna so will also receive those Tv transmissions to the , south , south east , south west , east , north west.
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As always , trees and tree leaves do a real good job of reducing or blocking Tv reception and so do buildings and other obstructions.
Mount the ANT751 antenna so that there is the least amount to no amount of obstructions to the , north east , north west , east , south east , south , south west.
The 2 main groups of Tv stations are , north east and south.