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A digital tuner is a tuning device that allows a television or radio set to
receive signals via airwaves, satellite, or cable and translate them into a
signal the device can display.
Useful for receiving digital broadcasts over the air or via satellite and
displaying it on a High Definition Television or Standard Definition
Television digital television set.
Term also used for radio receivers to tune in radio stations digitally (0.1
MHz increments in the US) as opposed to analog dialing. Radio may also be
received by digital radio tuners which receive audio signals via satellite.