The Kramer Electronics 611R is a video line receiver; it accepts a signal over Fiber Optics utilizing ST connectors and outputs composite video. With a receiver/transmitter combination, cable runs of 5 kilometers are possible.
Kramer Electronics 611R Features
Fiber Optics: Fiber optics carries the signal much farther than coax cable and is lighter. Signal transmission of up to 5 kilometers is possible
Ground Isolation: Another advantage of fiber transmission is complete ground isolation between source and display