Tektronix AWG2021 User Manual page 566

AWG2021 User Manual
Frequency component
included in real time
waveform
Figure F 7: 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.
Discrete
frequency
component
Window function Convolution component
frequency and discrete frequency
characteristic component
Appendix F: Miscellaneous
Convolution
component
F 19