As always , trees and tree leaves , plants and plant leaves , have a Negative effect on Broadcast Tv reception with a Tv antenna and so do buildings including your own roof and cabin and other obstructions.
The Best Practice is to install the HD4228HD antenna at a location that has the least amount to no amount of obstructions of any type or kind in the direction of reception including your own roof and cabin.
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The Tv/s Must Channel Scan for Digital Broadcast Tv stations/channels , often named the 'Air Channels' 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.
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Digital tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
Do a Double Rescan ,
http://www.dtv.gov/rescan.html.