For reception of the following Digital Broadcast Tv stations/channels at 20 feet antenna height.
WELF-TV REAL UHF Digital channels 36.1-2-3) , virtual numbers (36.1-2-3) PBS channels.
W42DH-D REAL UHF Digital channels 42.1-2-3 , virtual numbers (07.1-2-3) CBS and MyNetwork and 24 hour Weather/News.
WJFW-DT REAL UHF Digital channels 16.1-2 , virtual numbers (12.1-2) NBC and Antenna Tv.
W31BA REAL UHF Digital channel 39 and W02CF REAL UHF Digital channel 44.
Both are Religion Tv.
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WYOW REAL UHF Digital Channels 28.1-2-3 , virtual numbers (28.1-2-3) ABC and The CW and This Tv.
WYOW is Very Weak Signal Strength at 20 feet antenna height , minus -10.6 NM(dB).
WYOW may or may not be received reliably at 20 feet antenna height.
At 40 feet antenna height the signal strength looks like improves to about minus -4.0 NM(dB)
40 feet and higher antenna height will most likely provide reliable reception , depends on how much the trees are blocking reception.
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Install a Channel Master CM4228HD UHF antenna aimed at about 125 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
As always , the starting antenna aim direction is the -> starting antenna aim direction.
Adjust the antenna aim direction for best reception.
Most Digital Tv's have a signal strength meter and some digital Tv's also have a signal quality meter.
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Here are some above the roof antenna mounts.
http://www.ronard.com/909911.html. Use the 5 foot tripod antenna mount.
http://www.ronard.com/Tripods%200703/4712.html.
http://www.ronard.com/34424560.html. Use the #4560 eave antenna mount.
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box or buy from ronard.
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Here are some places to buy antennas and etc. .
http://www.solidsignal.com.
http://www.amazon.com.
http://www.channelmasterstore.com.
http://www.winegarddirect.com.
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Install a Winegard HDP-269 preamp.
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For 1 Tv connected use No splitter.
For 2 Tv's connected use a , HFS-2D , 2 way splitter.
Buy the HFS splitters at ,
http://www.solidsignal.com , or ,
http://www.hollandelectronics.com.
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To keep weather/water out of outside connections , Use coax that has the Compression type connectors on the ends of the coax , not the old crimp type connectors.
To make double sure weather/water does not get into outside connections wrap the connections/connectors/coax with coax seal.
http://www.coaxseal.com
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As always , trees and tree leaves , plants and plant leaves , have a negative effect on Tv reception and so do buildings and other obstructions including your own roof and house.
The best practice is to install the CM4228HD 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.
The Tv/s Must Channel Scan for the , OTA=Over The Air , 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.