摘要
在中央无线数字化覆盖地面数字电视建设基础上,我省基于数字微波干线网络传输的省本级地面数字电视前端已搭建完成。本文对央视单频网节目发射机激励器的主备信号来源拓扑组成进行简述,并对中央单频网节目卫星主用信源与省本级备用信源的关键信息进行比对分析。结合实际阐述主备信源切换后接收端可能出现的故障现象及解决方案,供读者探讨。
On the basis of construction of terrestrial digital television in central wireless digital coverage project,the provincial-level terrestrial digital TV front-end has been built based on digital microwave trunk network transmission.In this paper,the active and standby signal sources topology of CCTV Single Frequency Network(SFN)program transmitter is briefly described,and the key information of satellite main source and provincial standby source are compared and analyzed.Combining with the actual situation,this paper expounds possible fault phenomena and solution of receiver after active and standby source switching.
作者
秦海洋
Qin Haiyang(Liaoning Province Radio&TV Technical Support Center,Liaoning 110016,China)
出处
《广播与电视技术》
2020年第2期93-95,共3页
Radio & TV Broadcast Engineering
