Install a ANT751 antenna above the peak of the roof in such a manner that the roof and building are not , obstructing , impeding , blocking , reception in the directions of , South , South West , West , North West , North , North East.
Aim the ANT751 antenna at about 200 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna.
_____________
Home Depot and Lowes may or may not have the ANT751 in stock in the store , no mater what the Home Depot and Lowes web sites say.
Here are more places to buy antennas and etc. .
www.solidsignal.com
www.amazon.com
______________
Test reception with a New Continues Length Of Coax connected to the ANT751 antenna , run the New Continues Length Of Coax through a open window or door direct to 1 Tv.
No couplers , No grounging coupler , No splitters , No amplifiers , No HD Home Run , No computer , No etc. .
____________
Digital Broadcast tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
Do Double Rescan ,
http://www.wchstv.com/DoubleReScanAlert.pdf.
___________
_______