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SHS800X&SHS1000X User Manual
38
WWW.SIGLENT.COM
In fact, digital signals have frequency components above the fundamental
frequency (a square wave is composed of a sine wave of the fundamental
frequency and numerous odd harmonics), and generally, for oscilloscopes with a
bandwidth of 500 MHz and below, the system has a Gaussian frequency
response.
Therefore, the sampling frequency of the oscilloscope should be four or more
times the bandwidth frequency: f
S
= 4fBW. In this way, there is less aliasing, and
the components in the aliasing area are attenuated a lot.
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