摘要
中波发射台信号传导覆盖时会产生高频电磁波辐射,干扰发射机房电气设备、数字网络和播出系统,严重的谐波干扰导致电气设备和广播系统发生故障。因此,本文研究中波发射台高频干扰产生的原理及消除方案。在构建中波发射台信号采集模型的基础上,分析高频信号发出的源头、类型及传输路径,谐波干扰产生的原因以及如何处理消除高频干扰信号。经过理论研究和实践探索论证,实践结果表明,本文提出的方法能够在高频干扰出现时进行即时消除,保证广播系统的稳定运行,具有实际的应用效果。
High frequency electromagnetic wave radiation will be generated during signal transmission coverage of medium wave transmitting station, which will interfere with the electrical equipment, digital network and broadcasting system in the transmitting room. Serious harmonic interference will lead to the failure of electrical equipment and broadcasting system. Therefore, this paper studies the high-frequency interference generation principle and elimination scheme of the medium wave transmitter. On the basis of constructing the signal acquisition model of the medium wave transmitter, this paper analyzes the source, type and transmission path of the high-frequency signal, the causes of harmonic interference and how to deal with and eliminate the high-frequency interference signal. Through theoretical research and practical exploration and demonstration, the practical results show that, selecting the normal operating medium wave transmitter as the test object, managing and disposing the actual groups of high-frequency signals, it is verified that this method can eliminate the high-frequency interference in time, ensure the stable operation of the broadcasting system, and has practical application effect.
作者
杨宗开
袁宏润
YANG Zongkai;YUAN Hongrun(Yunnan Radio and Television Bureau Yongren 698,Yongren 651400,China;Yunnan Radio and Television Bureau Chuxiong 692,Chuxiong 675000,China)
出处
《电声技术》
2022年第5期51-54,共4页
Audio Engineering
关键词
中波发射台
高频干扰
消除方案
medium wave transmitting station
high frequency interference
elimination scheme
