76 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide
4 Math Waveforms
See Also • “Units for Math Waveforms" on page 73
Math Transforms
Math transforms perform a transform function (FFT) on an analog input channel or
on the result of an arithmetic operation.
• “FFT Measurement" on page 76
FFT Measurement
FFT is used to compute the fast Fourier transform using analog input channels or
an arithmetic operation g(t). FFT takes the digitized time record of the specified
source and transforms it to the frequency domain. When the FFT function is
selected, the FFT spectrum is plotted on the oscilloscope display as magnitude in
dBV versus frequency. The readout for the horizontal axis changes from time to
frequency (Hertz) and the vertical readout changes from volts to dB.
Figure 6 Example of Multiply Channel 1 by Channel 2
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