中波发射机模拟输入板电路原理剖析及调整  

Principle Analysis and Adjustment of Analog Input Board Circuit of MW Transmitter

作　　者：李晓坤 LI Xiaokun(Guangdong Radio and Television Technology Center,Guangzhou 510800,China)

机构地区：[1]广东省广播电视技术中心,广东广州510800

出　　处：《电视技术》2022年第11期121-125,共5页Video Engineering

摘　　要：哈广GZ-GS50 kW中波发射机是在哈里斯DAM中波发射机基础上的改进型产品。发射机采用数字调制技术,具有工作效率高、保护功能完善、工作性能稳定的特点。其中,模拟输入板为数字音频处理部分核心电路,其作用是产生A/D转换电路所需的音频和直流信号。对哈广50 kW中波发射机模拟输入板的电路组成、工作原理和调整方法进行详细论述,为技术维护人员的理论学习和维护实践提供参考。Haguang GZ-GS50 kW medium wave transmitter is an improved product based on Harris DAM medium wave transmitter.The transmitter adopts digital modulation technology and has the characteristics of high working efficiency, perfect protection function and stable working performance. The analog input board is the core circuit of digital audio processing, which is used to generate audio and DC signals required by A/D conversion circuit. In this paper, the circuit composition, working principle and adjustment method of Haguang 50kW medium wave transmitter analog input board are discussed in detail, which can provide reference for the theoretical study and maintenance practice of technical maintenance personnel.

关 键 词：DAM中波发射机 模拟输入板 工作原理 调整方法 

分 类 号：TN838[电子电信—信息与通信工程]