If you want the best RF modulator for converting various inputs into an RF signal for your TV’s coaxial cable port, the top choice is the RF Modulator — RCA Composite to RF Coaxial.

If you want the best RF modulator for converting various inputs into an RF signal for your TV’s coaxial cable port, the top choice is the RF Modulator — RCA Composite to RF Coaxial.

There will be a switch on the modulator to select either channel 3 or 4; this is up to you. – Now turn on the TV, and the RF modulator will detect your cable input for the TV.