Question

What is the Nyquist rule?

Answer 1

Answer:

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Explanation:

Nyquist's theorem states that a periodic signal must be sampled at more than twice the highest frequency component of the signal. In practice, because of the finite time available, a sample rate somewhat higher than this is necessary.

This theorem was the key to digitizing the analog signal. ... Nyquist's work states that an analog signal waveform can be converted into digital by sampling the analog signal at equal time intervals. Even today as we digitize analog signals, Nyquist's theorem is used to get the job done.

The frequency fn = 1/2Δt is called the Nyquist frequency. When spectra are presented for digital data, the highest frequency shown is the Nyquist frequency.