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I don't know the particulars, but I've heard of a UHF TV station that gave up its analog service and is only digital. Idea being that most viewers are on cable, and that cable companies are required to carry their programming by receiving the digital signal and converting it to an analog cable channel. The station supplied the converters to the various cable companies. What they get out of this is a huge savings on their electric bill, as digital transmissions require much less power than NTSC analog. And on UHF megawatts of power are the norm.
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