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Test reception with the , CM4228 , above the roof in such a manner that the roof and building are not , obstructing , impeding , blocking , reception in the directions of , East , South East , South .
Test reception without and with the amplifiers.
Aim the CM4228 antenna at about 162 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 aim antenna.
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 , Blocking , Reception
Multi-Path Reflecting signals bouncing all around.
The Best Pratice is to 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 including your own roof and house.
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Digital Broadcast Tv Tuners can develop -Digital Glitches - that are not cleared out with simple channel scans.
To clear the tuner do Double Rescan.
www.wchstv.com/DoubleReScanAlert.pdf