How to Convert Coaxial to Composite

By James Clark

A coaxial cable carries video and audio information for translation on a television. It is a common way of connecting satellite, cable and antenna TV programming with a receiver. A composite cable separates video and audio into separate connections. The three plugs on a composite cable are also color coded for simple connections. Converting coaxial to composite requires an RF modulator, a powered device that separates the coax signal and diverts it to three jacks, which can be used to connect a composite cable.

Things You'll Need

  • Coaxial cable
  • RF modulator, available at electronics stores
  • Composite AV cable

Step 1

Connect the coaxial cable to the threaded Coax IN jack on the RF modulator. Turn the coupler on the end of the cable clockwise to secure it to the jack.

Step 2

Insert the three plugs on one end of the composite cables into the color-coded yellow, white and red OUT jacks on the RF modulator. Yellow connects to video, white to left audio and red to right audio.

Step 3

Plug the power adapter into the DC jack on the RF modulator and connect the other end to a wall outlet.

Step 4

Connect the other ends of the coaxial and composite cables to compatible devices.

Tips & Warnings

  • Be careful not to bend or break the metal pin inside the coaxial cable. It must insert straight into the jack.
  • RF modulators typically convert and send a signal in one direction only, from coaxial to composite.