Keysight InfiniiVision DSOX1204A - Page 57

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Keysight InfiniiVision DSOX1204A/G Oscilloscopes User's Guide 57
However, digital signals have frequency components above the fundamental
frequency (square waves are made up of sine waves at the fundamental frequency
and an infinite number of odd harmonics), and typically, for 500 MHz bandwidths
and below, oscilloscopes have a Gaussian frequency response.
Figure 4 Theoretical Brick-Wall Frequency Response
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