MAKE SURE YOU ARE USING DIGITAL ANTENNA WITH A POWERED AMPLIFIER FOR BEST RECEPTION.
In United States, all broadcasters have gone to Digital Signal. It means if you have an older TV, you will need digital TV tuner like CloudAntenna. Learn more about Digital TV signals and CloudAntenna.
If you do not have a Digital or Satellite Antenna, FreeAir.tv can ship you one. Visit www.freeair.tv/activate and select CloudAntenna accessories.
Follow this link for a list of channels you should get.