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江苏广播发射中心肩负着6套中波频率的播出任务,6套频率中有5套共10台发射机采用3DX-50发射机,每台发射机有62块功放模块。在发射机的日常运行中,功放模块是最容易损坏的部件,对功放模块的维护是保证发射机安全运行的重要工作。本文着重介绍功放模块的原理与常见故障,并对日常运行中出现的一次故障进行分析,以加深对功放模块的理解,从而提高处理故障的能力,提升发射机安全播出的保障能力。
Jiangsu Broadcasting and Launching Center shoulders the task of broadcasting 6 sets of medium-wave frequencies. There are 5 sets of 6 sets of frequencies using 10 transmitters of 3DX-50 and 62 transmitters of each transmitter. In the daily operation of the transmitter, the power amplifier module is the most easily damaged component, and the maintenance of the power amplifier module is an important task to ensure the safe operation of the transmitter. This article focuses on the principle and common faults of the power amplifier module, and analyzes a fault occurred in daily operation to deepen the understanding of the power amplifier module so as to improve the ability of handling faults and enhance the security of the transmitter.