The Channel Master CM4228HD antenna is a excelent antenna for your reception location.
Install the antenna above the roof in such a manner that the CM4228HD antenna has unobstructed view that is not impeded blocked by the roof and building in the directions of , North West and North East.
Aim the CM4228HD antenna at about 317 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.
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A antenna system amplifier is not required.
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Digital Tv Tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
Do Double Rescan ,
www.wcshtv.com/DoubleReScanAlert.pdf