REDUNDANT STRUCTURE DEVICE FOR AMPLIFIER

PROBLEM TO BE SOLVED: To provide a redundant structure device for amplifiers, which can efficiently use a preliminary amplifier not only for major alarm actions but also for minor alarm actions. SOLUTION: In the redundant structure device, a relay control unit 250' switches a sector amplifier to the redundant amplifier 263' for a major alarm action that sector amplifiers 260' to 262' cannot continuously operate, and switches an amplifier for a sector that a minor alarm occurs to the redundant amplifier 263' for the minor alarm action that the sector amplifiers can continuously operate if there is not a major alarm action in other sectors. If there is a major alarm action in another sector because of a minor alarm action during operating the redundant amplifier 263', switching of a route because of the minor alarm action is returned to the original route, and an amplifier for the other sector that the major alarm occurs is switched to the redundant amplifier 263' to operate the preliminary one. COPYRIGHT: (C)2008,JPO&INPIT