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本文阐述高稳定电磁振荡频率源(原子频率标准及石英振荡器等)输出频率的短期稳定度的各种定义,它们彼此之间的相互关系以及换标方法。介绍目前对短期稳定度进行测量的主要方法及数据处理技术。引言高稳定的电磁振荡频率源(包括各式原子频率标准及高稳定石英振荡器等)在许多尖端科学技术领域中的应用日益广泛,并起着日益重要的作用。对高稳定频率源的主要技术要求,是其输出频率的准确度和稳定度。在许多应用中,由于发射接收系绕可以用同一个频率源来控制,或者可以进行同步统调,故对频率准确度和长期稳定度并不一定要求非常严格;然而对其短期稳定度则往往提出十分严格的要求,因为它对整个工程系统的精确度和分辨力往往起决定性的作用。
This article describes various definitions of the short-term stability of high-stability electromagnetic frequency sources (atomic frequency standards and quartz oscillators, etc.) output frequencies, how they relate to one another, and how to replace them. The main methods and data processing techniques for the measurement of short-term stability are introduced. Introduction Highly stable sources of electromagnetic oscillation (including various atomic frequency standards and high-stability quartz oscillators, etc.) are increasingly used in many cutting-edge science and technology and play an increasingly important role. The main technical requirement for a high stable frequency source is the accuracy and stability of its output frequency. In many applications, because the transmit-receive system can be controlled by the same frequency source or can be synchronized, it is not necessarily critical to the accuracy of frequency and long-term stability; however, its short-term stability is often limited Put forward very strict requirements because it often plays a decisive role in the accuracy and resolution of the entire engineering system.