4.Advanced User Guidebook
86
Blackman
Best solution for magnitude, worst for frequency.
Recommend to use for:
Single frequency waveforms, to find higher
order harmonics.
Hanning
Good for magnitude, but poorer frequency
resolution than Hamming.
Recommend to use for:
Sine, periodic and narrow band random noise.
Transients or bursts where the signal levels
before and after the event are significantly
different.
Kaiser
The frequency resolution when using the Kaiser
window is fair; the spectral leakage and amplitude
accuracy are both good.
The Kaiser window is best used when frequencies
are very close to the same value but have widely
differing amplitudes (the side lobe level and shape
factor are closest to the traditional Gaussian
RBW). This window is also good for random
signals.
Bartlett
The Bartlett window is a slightly narrower variant
of the triangular window, with zero weight at both
ends.
Figure 4-24, Figure 4-25, Figure 4-26, Figure 4-27, Figure 4-28, Figure 4-29
are examples for measuring sine wave with a frequency of 1kHz under the
selection of six different windows for FFT:
Содержание TAO3000 Dual-Channel Series
Страница 1: ...TAO3000 Dual Channel Series Tablet Oscilloscopes User Manual www owon com ...
Страница 93: ...4 Advanced User Guidebook 87 Figure 4 24 Hamming window Figure 4 25 Rectangle window ...
Страница 94: ...4 Advanced User Guidebook 88 Figure 4 26 Blackman window Figure 4 27 Hanning window ...
Страница 95: ...4 Advanced User Guidebook 89 Figure 4 28 Kaiser window Figure 4 29 Bartlett window ...
