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Appendix F: Miscellaneous
AWG2021 User Manual
FĆ19
Frequency component
included in real
Ćtime
waveform
Window function
frequency
characteristic
Convolution component
and discrete frequency
component
Discrete
frequency
component
Convolution
component
⇒
⇒
Figure FĆ7: Concept of Convolution
Figures F-8 through F-13 show the FFT window functions prepared for this
instrument and their characteristics. Also, note that if you use a window function
with taper processing, then carry out inverse Fourier transformation to make
real-time data, that real-time data is tapered.
The window functions are effective for investigating the frequency components
of the acquired waveform, but the waveform after the window function is applied
differs from the original waveform.