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5.Advanced User Guidebook
31
Figure 5-11 Blackman window
Figure 5-12 Hanning window
Notes for using FFT
Use Zoom function to magnify the FFT waveform if necessary.
Use the default dB scale for details of multiple frequencies, even if they have very
different amplitudes. Use the Vrms scale to compare frequencies.
DC component or offset can cause incorrect magnitude values of FFT waveform. To
minimize the DC component, choose AC Coupling on the source signal.
To reduce random noise and aliased components in repetitive or single-shot events, set
the oscilloscope acquisition mode to average.
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