为了解决频率稳定度、准确度和频率高、宽范围可调之间的矛盾，就需要频率合成技术。

To address the frequency stability, accuracy and high frequency, wide scope of powers between the contradictions requires frequency synthetic technology.

本文叙述了一个用微机控制的锁相环频率合成数字调谐系统的原理和设计。

In this paper the principle and design of a microcomputer-controlled PLL frequency synthesis digit tuning system is discussed.

该合成器采用程控时分复用小数分频锁相技术，解决了快速跳频频率合成中的诸多固难。

Some technique problems in fast frequency hopping synthesis are solved by making use of a programmable time division-fractional division PLL.

由此引起的过电压频率通常为正常的工作频率。

The voltages set up are of normal operating frequency.

双频率、双振幅。

Double frequency, double amplitude.