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Chapter 11 Sampling System
195
Figure 11-3 Sampling Rate and Oscilloscope Bandwidth
The oscilloscope bandwidth is limited to 1/4 sampling frequency and reduces the frequency response above the
Nyquist frequency.
Therefore, in fact, the oscilloscope sampling rate should be 4 times or more of its bandwidth: f
S
≥4f
BW
. This can
reduce aliasing and cause greater attenuation in the aliased frequency components.
Frequency
Attenuation
Aliasing
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