Revealing Waveform Characteristics up to a Digitizer’s Full Bandwidth

Application Notes

Increasing the effective sampling rate when measuring repetitive signals

To acquire a signal accurately and without aliasing using a discrete sampling system such as a digitizer or oscilloscope, Nyquist showed that the sampling rate must be at least twice the rate of the highest frequency component in the measured signal. However, digitizer specifications often quote bandwidth not to this Nyquist frequency but instead to the system analog bandwidth. This value describes signal attenuation (to 3 dB) as a function of its frequency. This is often shown as a Bode plot.

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Revealing Waveform Characteristics up to a Digitizer’s Full Bandwidth

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