Measurements, Final Exam, University Course Material, Comprehensive Study Guide

Measurements, Final Exam, University Course Material,
Comprehensive Study Guide


b - ANS✔✔ You are given a signal that contains frequencies up to 100 Hz. To properly acquire
this signal, the sampling frequency should be:



a) Below 50 Hz

b) Above 200Hz

c) Both a and b would work

d) 100 Hz



c - ANS✔✔ When the sampling frequency is too low to avoid aliasing



a) Only certain frequencies will not be seen in the signal

b) Certain frequencies will alias (will show up in the signal but at a higher frequency)

c) Certain frequencies will alias (will show up in a signal but at a lower frequency)

d) Only certain frequencies will be absent in signal



no - ANS✔✔ Aliasing can be easily removed after it has already occurred



yes or no



d - ANS✔✔ The Nyquist frequency equals



a) Sampling frequency

b) 2 * Sampling frequency

, c) Any value I can choose

d) ½ Sampling frequency



yes - ANS✔✔ I have a periodic signal with known period and I can determine An and Bn for the
given signal. This should be sufficient to plot the spectrum of that signal



Yes

No

It depends



a - ANS✔✔ The maximum frequency that can be displayed on the spectrum plot equals



a) ½ Sampling frequency

b) Sampling frequency

c) 2 * Sampling frequency

d) Any value I can choose



a - ANS✔✔ The frequency resolution for the spectral plot (for the FFT calculations) is solely
determined by:



a) The overall sampling duration

b) The Sampling frequency

c) The sampling period (duration between contiguous data points)

d) The frequency of the acquired signal

e) The number of data points acquired



a - ANS✔✔ Spectral leakage is