OPTICAL RADIO TRANSMITTER-RECEIVER, OPTICAL RADIO TRANSMITTER, OPTICAL RADIO RECEIVER AND OPTICAL RADIO TRANSMITTING DEVICE

PROBLEM TO BE SOLVED: To avoid the deletion of information due to a burst error by performing prescribed transmission control to a 1st information signal based on 2nd light receiving level information separated from a 2nd information signal. SOLUTION: Transmission light beams L1 are modulated with an externally supplied information signal S1 to be subjected to outgoing. A CPU 5 generates an output control signal S7 based on a light receiving level signal S26 showing the light receiving level of received light beams L2 in optical radio equipment 2, controls the output of the beams L1 by outputting it to a laser driving part 13 and controls the light receiving level of the beams L1 in the optical radio equipment 2' of the other party on a fixed level. Also, the CPU 5 generates an error control signal S5 based on the signal S26 and performs error measures processing to the signal S1 by outputting it to a transmission side error measures taking part 30.