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长期以来,脉冲参数(如幅度、上升时间、上冲、顶部不平度等)的测量一直是靠测量人员在示波器屏幕上眼观目测的。人为的因素给测量带来了一定的误差,尤其是对复杂不规则的、上升沿很陡的脉冲波形,如何准确地测量其脉冲参数,一直是计量工作者的研究内容。早在1975年,国际电工委员会(IEC)就定义,对脉冲波形的幅度值要按众数法来计算,但在采用数字技术以前,要实现这一定义是不可能的。因为,按照定义,必须要对被测波形进行高速、高分辨率的数字采集,然后借助于计算机进行分析处理。针对IEC的这一定义,美国国家标准局(NBS)在70年代研制并发表
For a long time, the measurement of pulse parameters (such as amplitude, rise time, overshoot, top unevenness, etc.) has always been measured visually by the surveyor on the oscilloscope screen. Artificial factors bring certain errors to the measurement, especially for the complex and irregular pulse waveform with steep rising edge. How to accurately measure the pulse parameters has always been the content of the measurement workers. As early as in 1975, the International Electrotechnical Commission (IEC) defined the magnitude of the pulse waveform as a common-law method, but it was not possible to achieve this definition until digital technology was adopted. Because, by definition, the measured waveform must be high-speed, high-resolution digital acquisition, and then by means of computer analysis. For this definition of IEC, the United States National Bureau of Standards (NBS) developed and published in the 70s