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You can test reception with the 4221HD.
The USA Tv Stations will be the hardest to receive because the big buildings are in the way.
The Canada Tv stations will be easier to receive.
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Most Digital Tv's have a feature that allows to scan for channels and then scan for more channels without losing the first channels.
Or a way to add channels without losing channels.
Read the owners manual that came with the Tv or read the owners manual on the internet.
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