For reception of ->Many<- USA and Canada Digital Tv stations/channels install a Winegard HD7698P antenna above the roof in such a manner that the roof and house are not impeding and blocking reception in the directions of , South , South East , West.
Aim the HD7698P antenna at about 170 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Old School magnetic compass to aim antenna.
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Install a Winegard , LNA-200 'Boost' XT , antenna system amplifier.
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For 1 Tv connected use No splitter.
For 2 Tv's connected use a , Holland Electronics , HFS-2D , 2 way splitter.
For 3 Tv's connected use a , Holland Electronics , HFS-3D , 3 way splitter.
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Here are some places to buy antennas and etc. .
http://www.saveandreplay.com.
http://www.trentondistributors.com.
http://www.solidsignal.com.
http://www.amazon.com.
http://www.amazon.ca.
http://www.winegarddirect.com.
http://www.hollandelectronics.com.
http://www.ronard.com.
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Here are some strong and sturdy antenna mounts.
http://www.ronard.com/909911.html.
Use the , ronard (911) , tripod antenna mount.
http://www.ronard.com/34424560.html.
Use the , ronard (4560) eave antenna mount.
http://www.ronard.com/ychim.html.
Measure the chimney and use a , ronard (2212) , ronard(2218) , ronard(2224).
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As always , trees and tree leaves , plants and plant leaves , have a Negative effect on Broadcast Tv reception and so buildings and other obstructions including your own roof and house.
Multi-path/reflections.
Absorbing the Tv transmissions.
Blocking the Tv transmissions.
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The Best Practice is to install the HD7698P 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.
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The Tv/s Must Channel Scan for , OTA=Over The Air , Digital Broadcast Tv stations/channels , often named the 'Air Channel' 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 digital tv's will Automatic channel scan for cable tv channels.
DO NOT channel scan for cable tv channels.
Go into the Tv Setup Menu and select 'Air Channels' ~ 'Antenna Channels'.
Scan for channels.