RF modulators convert the signal from an AV component to a format that is compatible with coaxial cables. Use an RF modulator with your DirecTV system if your TV does not feature the necessary AV inputs to connect it to the receiver. They can be a necessity for DirecTV subscribers who own older model TVs or TVs with damaged AV inputs.
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Plug one end of the component cables into the "Audio/Video OUT" ports on the rear of the DirecTV receiver.
Connect the other end of the cables into the matching AV ports on the modulator.
Fasten one end of the coaxial cable to the threaded RF jack on the side of the modulator and connect the other end to the "ANT IN" jack on your TV's input panel.
Plug the RF modulator's power adapter into a wall outlet to begin converting the signal to your TV.