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一、概述省教育台32CH美国哈里斯全固态10KW电视发射机整机共有末级大功率管112只,使用十年多来,1只也没有损坏,这是很好的状况;但另一方面,发射机的某一功放模块容易出现集电极电流过流保护告警,使功率有点下降,需要进行复位操作以恢复正常或者进行检修。这些功过都与功放模块内的电流检测/保护/补偿电路板有关,该电路是发射机的易出故障之一,下面就将该电流检测/保护/补偿电路板的作用、原理、技术数据、测试作一介绍:
First, an overview of the provincial education Taiwan 32CH US Harris all-solid-state 10KW TV transmitters a total of last-stage high-power tube 112, the use of more than a decade, one has not damaged, this is a good situation; but on the other hand , A power amplifier module transmitter prone to collector current over-current protection alarm, the power a little down, the need for reset to resume normal operation or maintenance. These functions are related to the current detection / protection / compensation circuit board in the power amplifier module. The circuit is one of the transmitter’s easy-to-break faults. The function, principle, technical data of the current detection / protection / compensation circuit board Test for an introduction: