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Appendix F: Miscellaneous
FĆ20
AWG2021 User Manual
Square Wave Window. The square wave window does not taper the time region
data. The filter shape in the frequency region is sin(x)/x. The square wave
window is appropriate for observing the frequency spectrum of non-repetitive
signals. The square wave window is also used for observing frequency compo-
nents near DC.
Window Function Freq. Magnitude
0 dB 3 dB Bandwidth
-20
-40
-50
0.89
-13 dB
Highest
Side Lobe
Figure FĆ8: Square Window and Frequency Characteristic
Hanning Window. The Hanning window is a function derived from the cos
function. This window function has superior magnitude precision and leakage
elimination characteristics.
Window Function Freq. Magnitude
0dB
3 dB Bandwidth
-40
-60
-80
1.44
-32 dB
Highest
Side Lobe
-20
Figure FĆ9: Hanning Window and Frequency Characteristic