广播电视发射台播出信号检测报警器设计制作

Design and Manufacture of Broadcast Signal Detection Alarm for Radio and TV Transmitting Station

介绍一套自行设计制作的报警器。报警器利用施密特触发器的回差特性设计制作而成,通用于中波、调频、电视发射台,能够对发射机的载频进行检测。报警器用到的核心器件是一种用途十分广泛的施密特触发器,利用其电位触发特性(又称回差特性)进行信号幅度的鉴别。只要信号幅度达到回差电压值以上,触发器就会翻转,报警器件发出报警。本文就报警器的结构、原理、调试方法作详细的论述。

This paper introduces a set of self-designed and made transmitting signal detection alarm for medium wave,frequency modulation and TV transmitting stations,which is designed and made by using the return difference characteristic of Schmitt trigger.The core device used is a widely used Schmitt trigger circuit,which uses its potential trigger characteristic(also known as back difference characteristic)to identify the signal amplitude.As long as the signal amplitude reaches above the return difference voltage value,the trigger will turn over and the device will give an alarm.In this paper,the structure,principle and debugging method of the alarm are discussed in detail.