If your TV was made before 2004 it probably doesn't have a built in digital tuner. This will require a converter box that is available from many sources. If the TV has a built in digital tuner, you can use any antenna that is capable of receiving
VHF and UHF TV signals. If your in a fringe area you might need a booster. Digital signals can be received via a coat hanger if your close enough. If the set is "HDTV ready" that does not mean it has a built in digital tuner. It means it is capable of HDTV via a cable box,
satellite receiver or converter box. It must have a built in tuner. Chuck