“My TVs are connected to an antenna.”

The change to an all-digital system affects free, over-the-air broadcast TV — the kind of TV signals received by a set-top or rooftop antenna. Whether or not your TVs are ready depends on whether they have built-in digital tuners. A digital tuner allows a TV to receive digital television signals broadcast by TV stations.

Do your TVs have a built-in digital tuner? (how do I know?)