Make sure your antenna receives UHF in addition to VHF. Lots of older antennas were VHF-only (channels 2-13).
Remember that the digital channel number shown on the screen now doesn't necessarily correlate to the actual radio channel. In our area, digital channel 7 (7.1, 7.2, 7.3) is transmitted at the pre-digital channel 21 frequency band.
An outdoor antenna with an outdoor amplifier is also recommended for fringe or rural areas.
Broadcast TV works pretty well in our rural area. Lots of people have dumped $60-120/month satellite subscriptions.