Fuzzy and snowy are words that describe Analog Tv reception.
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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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Digital Broadcast Tv tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
To clear tuner do Double Rescan.
www.wchstv.com/DoubleReScanAlert.pdf