The following is a Teleview recommendation for broadcast Tv reception.
As always , attics are Not the best location for digital broadcast Tv reception.
Install the omnidirectional antenna above the roof in such a manner that there are little to no obstructions to reception in all directions.
Install the ANT751 antenna Above The Roof in such a manner that there are little to no obstructions to reception in all directions.
Aim the ANT751 antenna at about 327 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
As always , trees and trees leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions.
It is best install a antenna at a location that has the least amount to no amount of of any type or kind of obstructions to reception.