数字调频功放管BLF188XR的特性与维修

Characteristics and Maintenance of Digital FM Power Amplifier BLF188XR

传统的广播电视无线发射系统逐渐引入数字技术,数字化已成为广播行业的发展趋势。数字音频广播(China Digital Radio,CDR)作为数字技术的关键组成部分,能够为广播节目带来更好的音质以及更强的抗干扰能力,确保广播信号在高速传输下依旧保持良好的接收质量。东营市广播电视台自2017年底正式开播FM频段无线数字广播,即CDR系统,在原有模拟信号频带内同时发射模拟节目与数字节目,实现带内数模同播。期间,笔者对数字调频功放管BLF188XR的使用情况进行了研究,在CDR发射机的维护和维修中积累了一些经验,以飨同仁。

The traditional radio and television wireless transmission system has gradually introduced digital technology, and digitalization has become the development trend of the broadcasting industry. As a key component of digital technology, China Digital Radio(CDR) can bring better sound quality and stronger anti-interference capability to radio programs, ensuring good reception quality under high-speed transmission of broadcast signals. Since the end of 2017, Dongying Radio and Television Station has officially launched FM band wireless digital broadcasting, i.e. CDR system, to simultaneously transmit analog programs and digital programs in the original analog signal band, so as to realize digital analog simulcast in band. During this period, the author studied the use of digital FM power amplifier BLF188XR, and accumulated some experience in the maintenance and repair of CDR transmitter for the benefit of colleagues.