EE354 Lab 3: Interview Grading Information Sheet
Lab 3 uses the Interview Grading Format. Each team will have a total of 18 minutes to present the results of their lab to
the instructor. Each session will have the following outline:
1. Up to 5 minutes to present an overview of the sampling theorem, theoretical predictions, and walkthrough of your
Matlab code.
2. Up to 4 minutes to present your Matlab simulation results from both the tone and chirp signal (ensure that you can
describe the figure/results to the instructor and interpret what they mean).
3. Up to 4 minutes to present your hardware captures from both the tone and chirp signal (ensure that you can
describe the figure/results to the instructor and interpret what they mean).
4. Up to 5 minutes for follow-on questions from the instructor.
Please be prepared, be organized, and be efficient. Sessions that run longer than 18 minutes will be penalized; sessions
that last longer than 20 minutes will be abruptly cut off.
Objectives:
1. Demonstrate the ability to calculate and predict the spectrum of a sampled signal, whether oversampled, sampled
at exactly Nyquist, or undersampled (aliased).
2. Apply Matlab to simulate the time-domain and spectrum of a tone and chirp signal when sampled above, at, and
below the Nyquist rate.
3. Generate the sampled chirp and tone signals, capture them on the oscilloscope, and compare the hardware
experimental results to theoretical predictions and simulation results.
4. Quantitatively evaluate the differences between theory, simulation, and hardware results.
5. Explain one or more practical benefits of sampling a signal – particularly the aspect of generating shifted copies
of the signal spectrum.
Criteria:
3
Advanced – Full understanding and mastery of the topic; answers are clear, concise, and
professionally presented.
2
Intermediate – Understands and can address the topic with prompting or outside
assistance (notes/textbook). Supplementary material (figures/table/code) are clean and
concisely documented.
1
Novice – Minimal understanding of the topic; requires heavy assistance from notes, text,
and instructor. Supplementary material (figures/table/code) have errors or lack context.
0
Not addressed/Below Novice – Lack of understanding of the topic; requires on-the-spot EI
in order to address/answer question; missing or unable to explain supplementary material
(figures/tables/code).
Note 1: At the beginning of the session, be prepared to give a very brief overview of how the sampling theorem works,
how you arrived at your predictions, and how your code works.
Note 2: Figures should have descriptive titles (do not rely on the titles in the boxes below): what signals are being
displayed, key parameter values, sampling frequency (if needed), and be self-contained. Axes should have units and
labels. Figures should display an appropriate region around the signal of interest and be clean, clear, and crisp. Points
will be deducted for figures that fail to meet the above requirements.
1
Figures to have prepared
Show a meaningful amount of the time domain of each signal as well as the frequency spectrum from exactly 0 – 20
kHz.
Tone Signal Simulation
•
•
•
fs = 44.1 kHz Time and Spectrum
fs = 22.05 kHz Time and Spectrum
fs = 8820 Hz Time and Spectrum
Tone Signal Hardware
•
•
•
fs = 44.1 kHz Time and Spectrum
fs = 22.05 kHz Time and Spectrum
fs = 8820 Hz Time and Spectrum
Chirp Signal Simulation
•
•
•
fs = 44.1 kHz Time and Spectrum
fs = 22.05 kHz Time and Spectrum
fs = 8820 Hz Time and Spectrum
Chirp Signal Hardware
•
•
•
fs = 44.1 kHz Time and Spectrum
fs = 22.05 kHz Time and Spectrum
fs = 8820 Hz Time and Spectrum
2