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If the step size of a system is 0.0625, find its quantization power?

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If the step size of a system is 0.0625, find its quantization power?

(a) 3.25 x 10^-3

(b) 3.25 x 10^-4

(c) 3.25 x 10^-2

(d) 3.25 x 10^-1

I have been asked this question in an interview for job.

My query is from Spectrum of Multitone Signal topic in division Amplitude Modulation of Analog Communications

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The correct option is (b) 3.25 x 10^-4

Best explanation: Quantization noise is a model of quantization error introduced by quantization in the analog-to-digital conversion (ADC) in telecommunication systems and signal processing. It is a rounding error between the analog input voltage to the ADC and the output digitized value.

Therefore,

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