10 kW调频发射机8+1自动切换控制系统设计与实现

Design and Implementation of 8+1 Automatic Switching Control System for 10kW FM Transmitter

随着广播事业的发展,各地发射台站的广播节目越来越多。宁夏广播电视台传输发射中心发射部主要承担着八套广播节目的无线发射任务,但8台10 kW调频发射机均为单机播出,这样的工作模式无法确保广播节目的安全播出,存在一定的安全隐患。为了保障广播节目不间断的播出,多数台站采用主机+备机的工作模式,但这样的配置资金投入较大。如何科学合理的为各发射机配置备机,是解决安全播出隐患的关键。传输发射中心发射部利用现有资源,对原单机发射系统进行升级改造,组建了10 kW发射机8+1自动切换控制系统,成为国内首创大功率、数量多的N+1发射系统。文章详细介绍了该系统的主要构成及技术特点,同时,重点对该系统的核心部件8+1系统控制器进行了实例分析。

With the development of broadcasting,there are more and more radio programs in the transmitting stations.The transmitting department of Transmitting center in Ningxia radio and television station is mainly responsible for the wireless transmission of eight radio programs.However,the eight 10 kW FM transmitters are all stand-alone broadcast,such a working mode can’t ensure the safety of broadcast programs,there are certain security risks.In order to ensure the uninterrupted broadcast of radio programs,most stations adopt the working mode of host+ standby,but such allocation results in large investment.How to scientifically and reasonably configure the standby machine for each transmitter is the key to solve the hidden danger of safe broadcasting.Based on the existing resources,the Transmitting department of Transmitting center upgraded the original single transmitter system,and established the 8+1 automatic switching control system of 10 kW transmitter,which became the first N+1 transmission system with high-power and large number of in China.In this paper,the main structure and technical characteristics of the system are introduced in detail,and 8+1 system controller,which is the core component of the system,is analyzed emphatically.