Radio Theory N3 — Document

November 2023 — N3 — Radio Theory

N3 2023 Nated Engineering

↓ Download PDF 📄 306.9 KB

Preparing document

📋 Document Analysis

🎯 100 marks ⏱️ 3h 📄 5 pages 📝 44 items found 📚 1 topics

See full analysis

Questions — A Preview of What to Expect in the Document

This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.10\n the ANSWER BOOK.

1.1kip distance is also called the silent zone.

1.2ntenna gain determines whether an antenna is omnidirectional or directional.

1.3time base selector is used for selecting the amplitude at which the time base generator must operate.

1.4A sweep signal generator is used for oscillator alignment in a radio receiver.

1.5Wow is caused by slow variations in tape speed.

1.6An operational amplifier used as an integrator uses resistors in the input as well as the feedback paths.

1.7The frequency of a modulation signal determines the rate of change of the carrier wave.

1.8A lou dspeaker is used to convert radio waves into sound waves.

1.9Automatic gain control is associated with AM receivers.

1.1010

Q2— Section header —

2.1Name the SIX basic parts of a cathode ray oscilloscope. (6\

2.2Draw a fully labelled block diagram showing test instruments connected to an amplifier for plotting the frequency response curves of the amplifier. (4\

2.3Briefly exp lain, with reference to a sweep signal generator the function of an udio tone.

2.4An oscilloscope dis plays an AC signal for one cycle with four horizontal divisions. The time/division control is set to 5 ms /division

Q3— Section header —

3.1Input power (3\

3.2Output power (3\

3.3Gain of the amplifier in decibels (4\ [10]10

Q4— Section header —

Q5— Section header —

5.1Draw a labelled circuit diagram of an AM detector. Include the input and output waveforms. (7\

5.2What is the purpose of the discriminator in a FM radio receiver? (3\

5.3What is the purpose of the IF amplifier in a FM radio receiver? (3\

5.4What is the function of the limiter in a FM radio receiver? (2\ [15]15

Q6— Section header —

6.2Giv e the THREE main uses of single sideband transmission. (3\ [10] 1104087310

Q7— Section header —

7.1Explain time division multiplexing as employed in data communication. (2\

7.2Define the term pulse position modulation (PPM\ (2\

7.3Explain the function of the modulator and demodulator in a modem. (2 + 2\ (4\

7.4Which t ype of code is the CCITT 2 code? (2\ [10]10

Q8— Section header —

8.1Give ONE advantage and ONE disadvantage of a l og periodic antenna over

8.2Explain, with reference to the ionosphere, what is meant by critical frequency (4\

8.3Briefly explain with reference to radio wave propagation , each of the following radio waves:

8.3.1Ground waves

8.3.210

Q9— Section header —

9.1List FIVE possible faults that will result in a variation of speed and resultant distortion of sound in a tape recorder. (5\

9.2Give THREE advantages of using AC bias over DC bias in a tape recorder. (3\

9.3Explain with reference to a magnetic tape recorder wow and flutter (2\

Topics Identified

Business Plan

Mark Allocation

Total100 marks

Sections10 + 15 + 10 + 10 + 15 + 10 + 10 + 10 + 10 = 100 marks

Paper information

TitleDocument

SubjectRadio Theory

LevelN3

Document typeQuestion paper

Year2023

MonthNovember

Pages6

Downloads3

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2023

Days since exam1,074

About Radio Theory examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

File details

File size306.9 KB

Pages6

Archived on8 September 2026

File age46d

ContributorFreeMode

Fingerprint566FCC736F93

Questions and learner discussion

No questions or discussions have been posted yet.