首先对设计方案和基本原理进行了分析，接着对该系统的核心逻辑设计进行了详细说明，探讨了大功率发射机工作在长波（１５ｋＨｚ－４０ｋＨｚ）时，如何利用现场可编程门阵列（ＦＰＧＡ）来对发射机回路的调谐元件进行控制的逻辑设计的方法，实现了在１５ｋＨｚ－４０ｋＨｚ之间频率调谐与控制、单片机和ＰＣ机之间串口通信。 First of all, the design scheme and the basic principle are analyzed. Then, the core logic design of the system is described in detail. How to make use of field programmable gate array (FPGA) when the high power transmitter works in the long wave (15kHz-40kHz) To the transmitter loop tuning components to control the logic design method to achieve between 15kHz-40kHz frequency tuning and control, microcontroller and PC serial communication between.