13-8
IM DL350-01EN
Notes about FFT Computation
Notes about Displaying Power Spectrums
• You cannot display a power spectrum if the display record length is less than the number of computed data
points (Point).
• The following settings are shared for all computation channel: FFT Points, Window, and Start Point.
Notes on Computation
• Computation is normally performed on the sampled data in the acquisition memory. For waveforms that
are acquired in Envelope mode, computation is performed on the maximum and minimum values at each
acquisition interval.
• When you enter the FFT menu and set FFT 1 and FFT 2 to ON, Math1 and Math2 cannot be used.
• An icon (
) appears in the center of the top of the screen when FFT computation is being executed.
• FFT analysis cannot be performed on waveforms stored through SD recording.
Notes about Using the 16-CH Voltage Input Module (720220)
Notes about Using the 16-CH Temperature/Voltage Input Module (720221)
13 FFT