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FFT Averaging Modes

Last Modified: December 18, 2020

You can perform averaged measurements on an FFT channel to improve measurement accuracy or to help compensate for a low signal-to-noise ratio.

  • Disabled—Disables FFT averaging.
  • RMS—Root mean square. RMS averaging averages the energy (or power) of the signal, so it reduces signal fluctuations, but not the noise floor.
  • Peakhold—Performs a peak hold averaging measurement at each individual frequency line and retains the RMS peak levels of the averaged quantities from one FFT record to the next. Peak-hold averaging is the most useful when configuring a measurement system or when applying limit or upper limit testing to a frequency spectrum.

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