Described is an RF signal transmission system for the TV relay station by using a wide band optical modulator which can modulate its optical power by RF signals from the recieving antenna. This system is very effective to prevent damages by lightning at TV relay stations since optical fibers can be used for the circuit between the recieving station and the transmitting station. In addition, use of this system can improve reliability and maintenance work as well as reducing construction cost because only passive circuits are used at the recieving station.
