Knowledge Note KN1050 CPJexd/CPJexr Using Rearview Camera You can use a typical USB cam as a rearview camera with CPJexr/CPJexd. Any USB camera or video capture device can be a rearview camera. Rearview camera works by the reversing light. Connect the reversing light wire to the channel C of CPJexr/CPJexd. Connect USB camera to the Car PC. You