Vector signal analyzer: Difference between revisions

Revision as of 12:58, 27 March 2020

Revision as of 07:20, 26 March 2021

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==== Signal spectrum from FFT ====

{{main|Fast Fourier transform}}

A [[fast fourier transform|FFT]] is used to compute the frequency spectrum of the signal. Usually there is a [[window function|windowing function]] option to limit [[spectral leakage]] and enhance frequency resolution.<ref>AgilentKeysight [https://literature.cdnstgwww.keysight.com/litwebcn/pdfzh/assets/7018-02679/technical-overviews/5990-6405EN6405.pdf], ''AgilentKeysight Vector Signal Analysis Basics'', p. 12, Figure 8, accessedPublish AugustSeptember 1130, 20112019.</ref> This window is implemented by multiplying it with the digitized values of the sample period before computing the FFT.

==== Constellation diagram ====