3kW PDM中波发射机改频实践  

Practice of frequency change of 3KW PDM medium wave transmitter

作　　者：吕瑞 Lv Rui(Henan Pingdingshan medium wave broadcasting station,Pingdingshan Henan,467000)

机构地区：[1]河南省平顶山中波转播台,河南平顶山467000

出　　处：《电子测试》2021年第16期109-110,共2页Electronic Test

摘　　要：本文分析了将3kW PDM全固态中波发射机载波频率由1521kHz改频到1557kHz的原理分析和具体操作步骤,改频工作主要涉及高频激励部分、调谐回路部分、高频网络部分、天馈线部分等。通过此项工作,使我们更加熟知了3kW PDM中波发射机原理并使在发射机出现失谐等故障时,能准确了解其故障原因,迅速的解决问题,为今后的安全播出工作增加一道保障。This paper analyzes the principle analysis and specific operation steps of changing the carrier frequency of 3KW PDM solid-state medium wave transmitter from 1521khz to 1557khz.The frequency changing work mainly involves high-frequency excitation part,tuning circuit part,high-frequency network part,antenna feeder part,etc.Through this work,we are more familiar with the principle of 3KW PDM medium wave transmitter.When the transmitter is out of tune,we can accurately understand the cause of the fault,quickly solve the problem,and add a guarantee for the future safe broadcasting work.

关 键 词：改频 高频激励器 调谐回路 T型网络 实践 

分 类 号：TN838[电子电信—信息与通信工程]