Turn off the Zenith TV and your cable or satellite set-top box.
Despite advances in the technology behind TVs and connection interfaces, a 1994 Zenith TV is compatible with the majority of video devices. Cable and satellite set-top boxes feature composite video ports that will work with the composite video connections on the rear of a 1994 Zenith TV. If you use an antenna to receive your service or direct cable wiring, you can use the RF jack on the rear of the TV to directly connect to your TV service.
Insert one end of the composite cable into the Video plus Audio Out jacks on the rear of the set-top box.
Plug the other ends of the composite cables into the Video plus Audio In jacks on the rear of the Zenith TV. Turn on the set-top box an the TV. Press the "TV/Video" button on the front of the Zenith until the image from the set-top box appears on the screen.
Turn off the Zenith TV.
Fasten one end of the coaxial cable to the RF jack on the wall outlet associated with your TV service or antenna. RF jacks are small, threaded pieces of metal about a quarter-inch in length. Turn the fastener on the end of the cable clockwise to secure the cable to the RF jack.
Fasten the other side of the coaxial cable to the TV In jack on the digital TV tuner. Turn the fastener to secure it to the jack. Connect another coaxial cable to the TV Out jack on the digital TV tuner.
Fasten the other end of the coaxial cable from the digital TV tuner to the Ant In jack on the TV. Turn on the digital tuner and the Zenith TV to begin displaying the image from the TV service on the TV.