Some older-model TV sets are not equipped with AV input jacks. AV jacks are the red, white and yellow RCA-style interfaces that come as a standard feature on modern model TV sets. An RF modulator is a type of converter that may be used to give a TV, which doesn't have built-in AV input jacks, AV input capacity. If, for example, you want to use AV cables to connect a satellite receiver to a TV set that doesn't have AV jacks, you can pass the signal through an RF modulator. The connection is not that complicated.
Cut power to the satellite receiver, TV set and RF modulator before proceeding with the cable connections.
Screw the coaxial cable connector attached to the coaxial cable carrying the primary satellite signal to the "Satellite In" terminal located on the back of the satellite receiver. (The coaxial cable coming through the wall or from a wall outlet carries the primary satellite signal).
Connect one end of the independent coaxial cable to the RF "TV Out" output terminal located on the rear panel of the RF modulator. Connect the other end of this coaxial cable to the RF "Antenna In" input terminal located on the rear panel of the TV set.
Insert one end of the red AV cable into the red AV output jack on the back of the satellite receiver; connect the other end of the cable to the RF modulator's red AV input jack. Insert one end of the white AV cable into the white AV output jack on the back of the satellite receiver; connect the other end of the cable to the RF modulator's white AV input jack. Insert one end of the yellow AV cable into the yellow AV output jack on the back of the satellite receiver; connect the other end of the cable to the RF modulator's yellow AV input jack.
Plug the power cable that came with the RF modulator into the RF modulator's DC power jack. Then connect the RF modulator to a power source.
Set the channel switch, located on the back of the RF modulator, to channel 3. Turn on the RF modulator.
Turn on the satellite receiver. Turn on the TV. Set the TV to channel 3. If the connections were made properly, you should be able to view satellite programming on your TV.