Week 7 Lab Instructions FFT Calculations and Oscilloscope FFT Intro Course Number: ECET430

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Week 7 Lab Instructions

FFT

Calculations and Oscilloscope FFT Intro

Course Number: ECET430

Name:

Laboratory Number: 6 (Week 7)

Laboratory Title: FFT Calculations and Oscilloscope FFT Math Function

Submittal Date: Click here to enter a date.

Instructions: Using this document as your template, follow the steps, answer the questions, and insert your screen shots as you progress through the lab.

Lab Overview

 

This lab has been designed to help you gain proficiency in making FFT calculations and give you practice in utilizing your oscilloscope for Fast Fourier Transforms. A Fourier Transform of a signal tells you what frequencies are present in your signal and in what proportions and has widespread importance in signal processing.

Required Materials

 

To accomplish this lab, you will need the following equipment

  1. One oscilloscope with an FFT math function on it.
  2. Oscilloscope probes
  3. One signal generator

Lab Procedure

1.     Sine Wave

Time for one cycle _______________; Frequency _______________

Peak to Peak Amplitude __________; DC Value _______________

The origin is 0 volts DC.

Calculate the Frequency Spectrum (don’t forget the DC component) and show your results below (refer to our lesson on Fast Fourier Transforms).

Replicate the waveform on your Oscilloscope using the Math Function FFT and copy the screenshot below.

2.     Saw tooth Waveform

Time for one cycle _______________; Frequency _______________

Peak to Peak Amplitude __________;

Calculate the Frequency Spectrum and show your results below.

Replicate the waveform on your Oscilloscope using the Math Function FFT and copy the screenshot below.

3.     Square Wave

Time for one cycle _______________; Frequency _______________

Peak to Peak Amplitude __________;

Calculate the Frequency Spectrum and show your results below.

Replicate the waveform on your Oscilloscope using the Math Function FFT and copy the screenshot below.

4.     Pulse Waveform or Unsymmetrical Square Wave

Time for one cycle _______________; Frequency _______________

Peak to Peak Amplitude __________;

Calculate the Frequency Spectrum and show your results below.

Replicate the waveform on your Oscilloscope using the Math Function FFT and copy the screenshot below.

5.     Pulse waveform;

1v for 0-1 usec

0v for 1.001-100 usec, then it repeats

Calculate the frequency spectrum as close as you can out to the third null and show your results below:

Conclusion: After making FFT calculations for various waveforms, what is the value of being able to calculate FFTs and perform FFT measurements on your Oscilloscope in relation to what you have learned about DSP? Which number waveform is closest to the impulse function?

Week 7 Lab InstructionsFFT Calculations and Oscilloscope FFT IntroCourse Number:ECET430Name:Laboratory Number: 6 (Week 7)Laboratory Title:FFT Calculatons and Oscilloscope FFT Ma±h FunctonSubmi±al Date:Click here ±o en±er a da±e.InstrucTons: Using this document as your template, follow the steps, answer the quesTons, and insertyour screen shots as you progress through the lab.Lab OverviewThis lab has been designed ±o help you gain profciency in making FFT calculatons and give you practcein utlizing your oscilloscope ²or Fas± Fourier Trans²orms. A Fourier Trans²orm o² a signal ±ells you wha±²requencies are presen± in your signal and in wha± proportons and has widespread impor±ance in signalprocessing.Required MaterialsTo accomplish ±his lab, you will need ±he ²ollowing equipmen±1.One oscilloscope wi±h an FFT ma±h ²uncton on i±.2.Oscilloscope probes3.One signal genera±or
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TCO 2) Given the resistance of the servo motor is 600 ohms, and beta is 175, find the following when Vin is 5

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(TCO 2) Given the resistance of the servo motor is 600 ohms, and beta is 175, find the following when Vin is 5

voltsScreenshot (100).png

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5. {TCO 2) Gwen the resistance of the servo motor E5 600 ohms, and beta is 1?5. find the foEEow’rng when ‘u’in is 5 matte. 50V
”I
§
113 k Vout
Vin ohms w
W sumac: i

 
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For a given length of coaxial cable with distributed capacitance C = 48.3 pF/m

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For a given length of coaxial cable with distributed capacitance C = 48.3 pF/m and distributed inductance L =

241.56 nH/m, determine the velocity factor and velocity of propagation.

 
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Question 1. 1. (TCO 1) Which of the following is not an alternative power system? (Points : 5)       

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Question 1. 1. (TCO 1) Which of the following is not an alternative

power system? (Points : 5)

      Solar panel

Hydroelectric

Windmill

Nuclear reactor

Question 2. 2. (TCO 1) According to IPC-D-275, what is the minimum spacing (in inches) recommended when the voltage between conductors (dc or ac peak) is between 101-170? (Points : 5)

0.025

0.060

.0125

0.250

Question 3. 3. (TCO 1) If the peak ac voltage is 200 volts, the root-mean-square voltage is _____. (Points : 5)

400 volts

50 volts

200 volts

100 volts

Question 4. 4. (TCO 1) In rectification by full wave _____. (Points : 5)

the frequency is doubled

the amplitude is doubled

the period is doubled

the amplitude is halved

Question 5. 5. (TCO 1) An inverter typically uses the following components. (Points : 5)

Two switches

A transformer and a switch

A rectifier and a switch

A diode and a switch

Question 6. 6. (TCO 1) If motor drive is a cycloconverter, then the motor is connected to how many phases at a time? (Points : 5)

Four

One

Two

Three

Question 7.7. (TCOs 1 and 2) What is the critical path? (Points : 10)

 

 

Question 8.8. (TCOs 1 and 2) If the software does not allow you to create smooth arcs in your traces, what should you substitute for a right angle? (Points : 10)

 

 

Question 9.9. (TCOs 1 and 2) The common return may snake literally over the board. What is the benefit? (Points : 10)

 

 

Question 10.10. (TCO 1) Discuss the steps to identify the critical path on a circuit board. (Points : 15)

 

 

 
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