Electronic Components… · SHS3 Applied Technology

Lesson notes

Learning Objectives

Indicator: 3.5.2.LI.10 - Describe the various type of modulation in communication

By the end of the lesson, learners can:

Define a carrier wave and explain its role in communication systems
Define modulation and explain why it is necessary for transmitting information over long distances
Describe amplitude modulation (AM) and frequency modulation (FM) and state at least one key difference between them
Describe pulse width modulation (PWM) and identify one practical application of each modulation type
Evaluate the suitability of AM, FM, and PWM for different communication scenarios using Ghanaian examples

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Curriculum details

Strand: Electrical and Electronic Technology (Strand 5)
Sub-strand: Electronic Components and Circuits (5.2)
Content standard: 3.5.2.CS.1 - 3.5.2.CS.1 Demonstrate knowledge and understanding of electronic components and use them to design and construct electronic circuits. 3.5.2.LO.1 Demonstrate knowledge and understanding of electronic components and use them to design and construct electronic circuits.
Indicator: 3.5.2.LI.10 - Describe the various type of modulation in communication
Suggested placement: Semester 2, Week 19 (Week 39 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.195: prints the content-standard code as "2.5.2.CS.1"; filed under the section's own 3.5.2.CS.1
content standard text - p.195: prints the learning-outcome code as "2.4.2.LO.1"; filed under the section's own 3.5.2.LO.1
content standard text - p.195: the front page prints "Strand 4." for Electrical and Electronic Technology inside the YEAR THREE section, where Year 3's strand 4 is Wood Technology (printed pp.164 and 170); the Contents page (printed p.6) prints "STRAND 5. ELECTRICAL AND ELECTRONIC TECHNOLOGY" for Year 3 and Year 2 numbers the same strand 5, so the row is filed under strand 5
indicator text - p.195: prints the learning-indicator code as "2.5.2.LI.10"; filed under the section's own 3.5.2.LI.10
exemplars - p.195: prints the assessment code as "2.5.2.AS.10"; filed under the section's own 3.5.2.AS.10
Curriculum reference: NaCCA curriculum document, p. 195

Exemplars (from the NaCCA curriculum)

Focal Areas:
1. Carrier Wave,
2. Modulation,
3. Types of Modulation (e.g. Frequency Modulation, Amplitude modulation, Pulse width Modulation) Pedagogy
Collaborative Learning: With the use of the internet, engage learners in mixed-ability groups to undergo the following activities:
- Explain Carrier wave
- Explain modulation
- Outline the types of modulation e.g.: AM, FM
Research and Collaboration: Organise the learners into mixed-ability and gender groups and task them to research on the Google search engine and the U-Tube to undertake the following activities and do a group presentation on their findings:
- Amplitude Modulation
- Frequency modulation Explain the differences between Amplitude Modulation and Frequency Modulation.

Assessment (3.5.2.AS.10). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning.

Teaching and Learning Materials:
- Computers installed with multism software
- Electronic Components
- multimeters
- the use of the internet