本文(上)中介绍了该系统的硬件组成、电路工作原理以及实现控制的方法。本文(下)介绍由单片机控制的频率合成器,利用软件对频率合成器实现点频、跳频、段频、扫频及显示等功能,扩大了合成器的功能和用途。本文所介绍的控制方法典型、实用,具有普遍使用价值。 This article (on) introduced this system hardware composition, the circuit principle of work as well as the realization control method. This article (below) introduces the frequency synthesizer controlled by the singlechip, and uses the software to realize the functions of frequency synthesizer, such as point frequency, frequency hopping, segment frequency, frequency sweeping and display etc., and enlarges the function and purpose of the synthesizer. The control method introduced in this paper is typical, practical and has universal value.