DAM中波发射机模拟输入板工作原理剖析与故障维修  

Working Principle Analysis and Fault Maintenance of DAM Medium Wave Transmitter Analog Input Board

作　　者：朱静静 ZHU Jingjing(Gansu Provincial Radio and Television Bureau,Hezuo Broadcasting and Relay Station,Gannan 747000,China)

机构地区：[1]甘肃省广播电视局合作广播转播台,甘肃甘南747000

出　　处：《电视技术》2023年第10期113-115,120,共4页Video Engineering

摘　　要：DAM中波发射机核心电路采用了先进的数字调制技术和功率合成技术,与传统调制方式的发射机相比,整机性能和电声指标都有很大的提高,工作效率可以达到90%以上。DAM中波发射机整机由若干个功能板块组成,其中模拟输入板为发射机的核心功能板块。以DAM 10 kW中波发射机为例,对模拟输入板的工作原理进行剖析,并探讨模拟输入板常见故障处理方法。The core circuit of DAM medium wave transmitter adopts advanced digital modulation technology and power synthesis technology.Compared with the traditional modulated transmitter,the performance and electroacoustic index of the whole machine have been greatly improved,and the working efficiency can reach more than 90%.The whole DAM medium wave transmitter is composed of several functional plates,among which the analog input board,conversion board and modulation coding board are the core functional plates of the transmitter.This paper takes a typical DAM 10 kW medium wave transmitter as an example,analyzes the working principle of the analog input board of the DAM medium wave transmitter,and discusses the common troubleshooting methods of the analog input board.

关 键 词：DAM中波发射机 模拟输入板 增益调整 

分 类 号：TN838[电子电信—信息与通信工程]