National Instruments SCB-68 User Manual page 54

Chapter 5 Adding Components for Special Functions
ringing in the signal as the higher frequency components of the signal are
delayed.
Time (t)
Figure 5-8. Square Wave Input Signal
Figures 5-9 and 5-10 show the difference in response to a square wave
between an ideal and a real filter, respectively.
Time (t)
Figure 5-9. Response of an Ideal Filter to a Square Wave Input Signal
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