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Why do I have to rescan for channels or switch the video input on my HD TV in order to view HD channels instead of analog channels?

April 26, 2017channels HD input Rescan Switch tv video view

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Why do I have to rescan for channels or switch the video input on my HD TV in order to view HD channels instead of analog channels?

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Some televisions have two built-in tuners: one to receive an analog signal and the other to receive a digital signal. In order to view digital channels, you may have to switch to the digital tuner, which in turn will require a rescan for the available digital channels and vice versa when you want to return to viewing analog channels you must rescan on the analog tuner. Consult your television owner’s manual for more information regarding the built-in tuners.