For reception of the -->UHF Tv channels<-- and -->VHF Tv channels<-- install a Winegard HD7696P antenna above the roof in such a manner that the roof and house are not blocking reception to the , north west , north east and , south west.
Aim the HD7696P antenna at about , 340 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use no preamplifier.
For 1 Tv connected use No splitter.
For 2 Tv's connected use a simple common 2 way splitter.
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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.
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Here are some above the roof antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com ,
http://www.ronard.com/34424560.html if using the eave mount use the #4560.
Buy the ronard antenna mounts at soloidsignal buy typing the word ronard in the solidsignal search box or buy from ronard.
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As always , trees and tree leaves do a good job of , reflecting , reducing , blocking , Tv reception and so do buildings and other obstructions including your own roof and house.
It is best to install the HD7696P 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 roof and house.
The Tv/s Must Channel Scan for the Broadcast Tv Channels , often 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.
Some Tv's automatic channel scan for cable tv channels.
Go into the Tv setup menu and select , 'Air Channels' / 'Antenna Channels'.
DO NOT channel scan for cable Tv channels.