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As always , trees and tree leaves , plants and plant leaves , have a Negative Effect on Broadcast Tv Reception and so do buildings and other obstructions including your own roof and building.
Some and not all Negative Effects are.
Absorbing and Blocking Reception.
Multi-Path Reflecting Tv Signals Bouncing Around.
The Best Pratice is install the antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception.
North , North West , South West.
Aim the antenna at about 357 degree magnetic compass direction.
Here is how to aim antennas ,
www.kyes.com/antenna/pointing/pointing.html
Use a Real and Actual magnetic compass to a antenna.
As always , the antenna aim can be adjusted for best reception.
Most Digital Tv's have a , Signal Strength Meter , and some Digital Tv's also have a , Signal Quality Meter.
Signal Quality is Important for Reliable Reception.
With the HD7694P
If you can avoid obstructions.
Then you will be looking at reception of.
The Tv Stations of the , Digital Current Plus Pending Applications Included , Green and Yellow reception zone.
When testing reception , have only 1 Tv connected , No splitters.
Every time the signal is split , the signal strength is reduced.