Mr. Duffy had discovered that over-the-air digital signals behave differently from analog signals. That won’t matter to most Americans come the switchover. They either own a digital TV or get their signal through cable or satellite. But 17 million households have an analog TV that receives its signals over the air — 13 million of them use a rabbit-ear antenna. That means that not only do they have to buy a digital converter box; they may have to buy a new antenna. An additional 18 million homes have TVs that get over-the-air signals, but the residents have other TVs that are connected to cable or satellite services.Estimates from a computer simulation run by Centris, a market research firm in Los Angeles, found that more than nine million households that now get programming over the air could lose one or more stations they now receive.A Downside to Digital TV - New York Times
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