Exp. No.3: SINUSIODAL WAVEFORM, MEASURING PHASE …fkee.uthm.edu.my/images/docs/labsheet/1/BEJ10801/...FKEE, Sem01 Session 2019/20 Instruction 1. Grouping: Lab group is not predetermined

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Name Matric no. Section:

1.

Instructors’ name:

2.

3.

4.

5.

Title Time/ Date

Experiment no.: 03

Experiment title : SINUSIODAL WAVEFORM, MEASURING PHASE AND FREQUENCY USING OSCILLOSCOPE

FOR INSTRUCTORS USE ONLY

Domain Item Subtotal Total

C Question /15

/20 Conclusion /05

P Pre laboratory /20

/60 Results and analysis /20

Lab activities /20

A Demonstration (understanding) /10

/20 Ethics /10

TOTAL MARKS /100

BEJ10801 – Fundamental Electronic Laboratory

Instruction Sheet

SINUSIODAL WAVEFORM, MEASURING PHASE AND FREQUENCY USING

OSCILLOSCOPE

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Fundamental Electronic Laboratory (BEJ10801) Exp. No.3: SINUSIODAL WAVEFORM, MEASURING PHASE AND FREQUENCY USING OSCILLOSCOPE

ii

FKEE, Sem01 Session 2019/20

Table of Content

Table of Content ii

Instruction 1

Pre Laboratory 2

1. Title 4

2. Outcomes 4

3. Overview 4

4. List of Equipment 4

5. Experiment Procedures 5

5.1. Magnitude and Frequency of Sinusoidal Waveform 5

5.2. Frequency Measurement Using Lissajous Pattern 5

5.3. Phase and Frequency Measurement of Series RLC Circuit 6

6. Results and Analysis 8

7. Questions 11

8. Conclusions 12

9. Related course(s) 13

10. References 13

Fakulti/Pusat Pengajian (Faculty/Centre) :

Faculty of Electrical and Electronic Engineering

Mukasurat (Page):

1

Kod Kursus (Course Code):

BEJ 10801

Nama Kursus (Name of Course) :

Fundamental Electronic Laboratory

Kursus Pra Syarat (Prerequisite Courses) :

None

Kredit

(Credit):

1

Kuliah

(Lecture):

0

Tutorial :

0

Amali

(Practical):

2

Edisi (Edition) : 2 Tarikh Keluaran (Published date) : September 2019


Instruction

1. Grouping: Lab group is not predetermined and consists of _ members (maximum).

2. Pre-Lab Assignment: Must be submitted to the instructor at the beginning of lab sessions.

Verified by the instructor and returned to the students at the end of lab session. The verified

pre-lab must be attached with the final report for submission.

3. Lab Activities: All laboratory activities must be carried out in this laboratory and to be

completed within the given times.

4. Demonstration: Student must demonstrate the experiment to the respective instructor.

5. Report Submission: Report must be submitted to the respective instructor upon

COMPLETION of lab session.



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Pre Laboratory 1. Formulate the general form of a sinusoidal waveform. Point out the key elements.

2. List out the key readouts if measuring with an oscilloscope



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3. Sketch the connection of the circuit in Figure 1 on the following bread board diagram with correct

electronic schematic symbols.



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1. Title

Sinusoidal Waveform, Measuring Phase And Frequency Using Oscilloscope

2. Outcomes

The desired outcomes to be achieved at the end of the experiment:

1. Analyze the characteristic of an AC circuitry using an oscilloscope.( PLO2-PS-C4)

2. Organize time management in group effectively according task given. (PLO5-TS-P5)

3. Demonstrate good leadership skill during laboratory experiment. (PLO9-LS-A3)

3. Overview

An oscilloscope could be used to determine the waveform from an unknown input. Critical

information of the measured waveform could be further read-out, such as the cycle time, the peak

value and etc. A special method called Lissajous diagram could be performed using a two-port

oscilloscope where both the frequency and phase angle of impedance could be determined.

4. List of Equipment

List of equipment used:

1. Oscilloscope (Analog)

2. Oscilloscope probes (sufficient)

3. 2 x function generators

4. 1 x 1kΩ resistor

5. 1 x 10mH inductor

6. 1 x 0.1µF capacitor



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5. Experiment Procedures

5.1. Magnitude and Frequency of Sinusoidal Waveform

Procedures :

1. Turn on the oscilloscope.

2. Set AC –DC- GND switch to GND and determine the 0V reference. After that switch it

back to AC.

3. Set the frequency selector of the function generator to 1 kHz and select sine wave.

4. Connect the output of the function generator to input X (channel 1).

5. Adjust the amplitude of the function generator to 6Vp-p.

6. Observe the waveform and draw your observation.

7. Determine the key readouts.

8. Switch the selector of the function generator to triangular wave and repeat step 5.

5.2. Frequency Measurement Using Lissajous Pattern

Notes:

1. You need two sets of function generators, namely Gen A and Gen B.

2. The arrangement of the generators are:

Gen A [𝑓𝐴, Sine, 6Vp-p] and Gen B [𝑓𝐵, Sine, 6Vp-p].

where 𝑓𝐴 and 𝑓𝐵 are adjustable.

Trial 1:

1. Connect Gen A and connect to input X and input Y of the oscilloscope.

2. Choose a low frequency, 𝑓𝐴.

3. Observe waveform A via input X and input Y.

4. Set the oscilloscope selector to X-Y.

5. Observe the Lissajous pattern and draw the observed pattern. (Refer to theory.)

6. State your observation with respect to the theory.



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Trial 2:

1. Connect Gen A and Gen B to input X and input Y of the oscilloscope respectively.

2. Choose a low frequency for 𝑓𝐴 and 𝑓𝐵.

3. Observe waveform A and B.

4. Set the oscilloscope selector to X-Y.

5. Observe the Lissajous pattern and draw the observed pattern. (Refer to theory.)

6. State your observations and explain it.

Trial 3:

1. Continue from Trial 2.

2. Try out the ratio 𝑓𝐴: 𝑓𝐵 as [1:1, 1:2, 1:3] one after another.

3. Observe the Lissajous pattern for each given ratio and draw the observed pattern. (Refer

to theory.)

4. Formulate your observation if possible.

5.3. Phase and Frequency Measurement of Series RLC Circuit

Procedures :

Figure 1:RLC circuitry in series

Trial 1:

1. Connect RLC circuit as shown in Figure 1.

2. Choose any input frequency.



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3. Connect the oscilloscope probes at Vin and Vout.

4. Observe and draw the waveforms of Vin and Vout. Calculate phase difference between Vin

and Vout from the screen.

5. Observe and draw the Lissajous pattern and calculate phase difference between Vin and

Vout using formula shown in Figure 2.

6. Place probe across 10mH inductor and draw the Lissajous pattern.

7. Place the probe across 0.1µF and draw the Lissajous pattern.

Formula for phase difference:

Figure 2:Phase angle measurement using Lissajous Pattern

Trial 2:

1. Connect RLC circuit as shown in Figure 1.

2. Connect the oscilloscope probes at Vin and Vout.

3. Vary the input frequency from low to high.

4. Observe the waveforms of Vin and Vout. Record the phase difference between Vin and Vout

from the screen.

5. Observe the Lissajous pattern. Record phase difference between Vin and Vout using

formula shown in Figure 2.



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6. Results and Analysis

6.1 Result for experiment procedure 5.1



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6.2 Results for experiment procedure 5.2



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6.2 Results for experiment procedure 5.3



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7. Questions

7.1 Explain the reasons that the patterns are not static when two sources of signal generators

are used.

7.2 From the experiment of RLC circuitry, what are the relationship between the frequency

and the phase? Explain the reasons.



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8. Conclusions



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9. Related course(s)

BEJ 10702 - Instrumentation and Measurement.

10. References

1. J. P. Bentley, Principles of Measurement System, 3rd Edition. Pearson Prentice Hall, 1995.

Call number: QC53 .B46 1995

2. Principles of Measurement System, (Fourth Edition); J.P. Bentley, Pearson Prentice Hall,

2005.

3. R. G. Gupta, Electronic Instruments and Systems: Principles, Maintenance and

Troubleshooting, McGraw Hill, 2001. Call number: TK7870.2 .G86 2001

4. D. Jones, and C. A. Foster, Electronic Instruments and Measurements. Prentice Hall

International Edition, 1991. Call number: TK7878.4 .J66 1991

5. D. A. Bell, Electronic Instrumentation and Measurements, 2nd Edition. Prentice Hall

Career and Technology, 1994. Call number: TK7878 .B45 1994

Online references:

1. http://faculty.pnc.edu/jlerne00/ecet207/ex_7.pdf 2. http://www.allaboutcircuits.com/vol_2/chpt_12/2.html 3. http://labs.physics.dur.ac.uk/skills/skills/lissajous.php

http://faculty.pnc.edu/jlerne00/ecet207/ex_7.pdf

http://www.allaboutcircuits.com/vol_2/chpt_12/2.html

http://labs.physics.dur.ac.uk/skills/skills/lissajous.php

Documents

Exp. No.3: SINUSIODAL WAVEFORM, MEASURING PHASE …fkee.uthm.edu.my/images/docs/labsheet/1/BEJ10801/...FKEE, Sem01 Session 2019/20 Instruction 1. Grouping: Lab group is not predetermined