What UHF antenna is installed and being used at your location??
The DB4 ,
http://www.amazon.com/Antennas-Direc.../dp/B000EHYG9K
OR
The DB4e ,
http://www.amazon.com/Antennas-Direc.../dp/B0074H3IU6.
The DB4 has narrower forward reception beam width.
The DB4e has a wider forward reception beam width.
A Wider forward beam width is desirable at your reception location.
Beam Width is the angle of reception to the left and right of the front of the antenna
that Tv stations will be received.