新的IEEE标准-非活动撤销。 本文件是1964年5月IEEE第257号技术委员会时域突发测量推荐实践报告的配套文件。在时域文档中，定义了突发事件，并特别关注其持续时间和大小。 在调查突发事件的原因和影响时，可能需要使用额外的特征。数学变换已被广泛用于显示信号的特定特征。也许最常用的是傅里叶变换，它定义了信号的频谱。 本报告的主题是突发事件的能量密度谱，这是一个由傅里叶变换导出的量。其他变换，如希尔伯特变换或汉克尔变换，可用于显示突发的不同特征，但此处不考虑它们。对能量密度谱进行采样是本文件的关键概念。它构成了通过大量实际测量来综合表征光谱的基础。因此，附录中详细考虑了频域中的采样定理，以理解所讨论的测量方法。

New IEEE Standard - Inactive-Withdrawn. This document is a companion to Technical Committee Report on Recommended Practices for Burst Measurements in the Time Domain, IEEE No. 257, May 1964. In the time domain document, bursts are defined and particular attention is placed on their duration and magnitude. The use of additional characteristics may prove desirable when investigating both cause and effect of a burst. Mathematical transformations have been widely used to bring out particular characteristics of signals. Perhaps the one most commonly used is the Fourier Transform, which defines the spectrum of signals. The energy density spectrum of a burst, a quantity derived from the Fourier Transform, is the subject of this report. Other transformations such as those of Hilbert or Hankel, may be used to display different characteristics of a burst but they will not be considered here. Sampling the energy density spectrum is the key concept of this document. It constitutes the basis by which this spectrum can be characterized comprehensively by a practical number of measurements. The sampling theorems in the frequency domain are, therefore, given detailed consideration in Appendices to the extent necessary for understanding the measurement methods to be discussed.