5.Advanced User Guidebook
Hanning
Good for magnitude, but poorer frequency
resolution than Hamming.
Recommend to use for:
z
Sine, periodic and narrow band random noise.
z
Transients or bursts where the signal levels
before and after the event are significantly
different.
Blackman
Best solution for magnitude, worst for frequency.
Recommend to use for:
z
Single frequency waveforms, to find higher
order harmonics.
Figure 5-10
,
Figure 5-11
,
Figure 5-12
,
Figure 5-13
are examples for measuring sine wave
with a frequency of
1kHz
under the selection of four different windows for FFT:
Figure 5-10 Rectangle window
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