Question

An experimental analysis of the natural oscillations in a particular structure shows the dominant frequencies of interest appear at below 200 Hz. However, frequency information also exists at 350, 450, and 750 Hz. If the signal is sampled at 400 Hz, how will the information in the aliased frequencies appear in the sampled data

Answer 1

Answer:

to prevent the aliased frequency from  occurring at ±50Hz , WE MUST SAMPLE AT fs of min

⇒ 2 x 750

= 1500Hz

Explanation:

check attachment for explanations.