在广播电视安全播出日益严竣的形势下,无人值守发射站点的安全播出更加凸显出不可靠性。本文介绍了一种调频广播防止非法插入信号的防插播发射系统,简述其设计背景、工作原理及实现。 Security broadcast in the increasingly tense radio and television situation, unmanned station safe broadcast more highlights the unreliability. This article describes a FM radio to prevent the illegal insertion of anti-Spam broadcast system, briefly describes its design background, working principle and implementation.