多通道固态调频发射系统

ＳＨＤ－Ａ型多通道固态调频发射机系统主要应用于航空通信系统－点对多点的声音、振动、测控等基带信号的发射与传输。此发射机采用了锁相频率合成器、单机多通道（１－４频道）发射和固态功放电路等技术，与目前国内的晶振固定发射频率调频发射机相比具有发射频率可随意调整、频稳度高、省去了多级倍频器和高阶滤波器，使电路简单可靠、调试方便、性能价格比高。是国内首先将此技术应用于小型固态调频发射机机型，此系统已通过航空

Multichannel Solid-state FM Transmitting System

SHD-A model transmitter is applied to emit and convey baseband signal of sound, vibration and measure-control in aeronautical communication system from one point to mul-ti-point. New technologies are adopted in the system, such as phase-locked freqencyyn-thesize modulaor, multiplex (1-4 band) trancmitting, solid high frequency sability. Because it does not employ multistage frequency double and high order fliter, the circuit is simple and reliable, and has high radio of performance and cost. The technologies are first applied to small solid state emitter in China. The system is evaluated by aeronautical general company and has put into using.