基于Tektronix数字存储示波器的数字信号处理方法研究

提出了一种用带FFT功能的数字存储示波器研究信号处理的方法.利用数字示波器的显示功能,通过时基放大、改变量化电平数值、快速傅立叶变换、加窗等方法对数字信号的采样、混叠、量化、频谱泄漏等抽象概念进行了分析.直观地从时域与频域展示了各种频谱效应,直接测量获得了信号相关参数,避免了实验过程中大量的数据处理,特别是FFT功能,省略了繁琐的数学计算,是一种直观可行的实验研究新方法.

Study on Digit Signal Process Using Tektronix Digital Storage Oscilloscope

A method on investigating digital signal using digital oscilloscope with function of FFT was prompted.Based on the display capabilities,those abstract conceptions such as sampling,aliasing,quantity and frequency spectrum leakage have been discussed by using time base zoom out,vary quantity level,FFT and windows.Digital oscilloscope straightly bring forth the effects of frequency spectrum in both the time and frequency domain and avoid a significant amount of material in one laboratory period.This approach also gives a much deeper understanding of how modern digital-domain instruments work,including a strong appreciation of their strengths and practical limitations.