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“How am I supposed to observe signal integrity, jitter or even drift issues in my frequency measurements with only a numeric readout?” A simple numeric reading gives you only part of the story. An equally important question is: “How stable is the oscillator frequency in my circuit after several periods?” Understanding this and other questions requires looking at measurement statistics. What is the average value of my signal? What is the standard deviation or Allan deviation of my measurement? Tektronix FCA3000, FCA3100 and MCA3000 Series Timer/Counter/Analyzers offer integrated analysis functions to help you quickly answer these questions. 下載： 
Measurement Statistics, Histograms and Trend Plot Analysis Modes.pdf
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