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What causes a new signal with frequency fs-fm to be created near the original signal?(a) Attenuation(b) Imaging(c) Aliasing(d) DistortionThis question was addressed to me during a job interview.This question is from Data Conversion in portion Digital Communication Techniques of Avionics

Answer»

The CORRECT option is (c) Aliasing

To elaborate: Aliasing occurs when a signal is sampled mistakenly at a frequency LESSER than twice the input frequency. It CAUSES a new signal with a frequency of fs-fm to be created near the original signal.



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