Vector signal analyzer: Difference between revisions

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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>Agilent [http://cp.literature.agilent.com/litweb/pdf/5990-7451EN.pdf], ''Agilent Vector Signal Analysis Basics'', pg. 12, Figure 8, accessed August 11, 2011.</ref>. This window is implemented by multiplying it with the digitized values of the sample period before computing the FFT.
'''Constellation Diagram'''
{{main|Constellation diagram}}