RADIO RELAY AMPLIFIER

PROBLEM TO BE SOLVED: To provide the radio relay amplifier where no drop wires are required for both power and wired communication lines resulting in reducing the cost and period of the installation works and decreasing the operating cost. SOLUTION: A solar battery 28 and a secondary battery 29 are used together to supply power required for the operation of a radio relay amplifier 20. A remote controller 40 and a base station 10 are interconnected by a public line or leased line 30 and a remote monitor control signal is sent/received between the base station 10 and the radio relay amplifier 20 by means of radio communication. A control section 26 controls operating states (setting of incoming/ outgoing channels and setting of transmission level or the like) of a radio relay amplifier section 23 based on the remote monitor control signal received by a remote monitor control signal reception section 24. The control section 26 allows a remote monitor control signal transmission section 25 to transmit such information as the operating state, presence of an operating fault, contents of the fault, a power supply voltage and remaining capacity of the power supply of the radio relay amplifier section 23.