Communication Electronics N5 — Memo

August 2019 — N5 — Communication Electronics

N5 2019 Nated Engineering

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Q1— Section header —

1.1direct [10]10

Q2— Section header —

2.1.1otal = (2 + 2\ + ( .e tan = 45 and ZT = = 5,65 or 5,7 I = I =

2.1.2=Im sin Where Im = 17,5 24,75 A Frequency = 377 rad/s = Im sin( = 24 (377

2.1.3(2\

2.2

2.3.1Impedance versus frequency for a parallel tuned circuit

2.3.2Current versus frequency for a parallel tuned circuit

2.3.3Curren t versus frequency for a series tuned circuit

2.3.430

Q3— Section header —

3.1A symmetrical two port network is defined as a symmetrical two port network that has similar input and output ports which may be interchanged. (3\

3.2.1

3.2.2(2\ [10]10

Q4— Section header —

4.1A constant K filter is a simple filter known prototype because of its characteristic that the product of the series and shunt impedances is constant at all frequencies. The impedance of this filter varies with frequency and the

4.2= 190,1 mH C = type filter type filter [10]10

Q5— Section header —

5.1The b uffer a mplifier isolates the oscillator from load variations in other parts of the transmitter and provides stability to the oscillator. The f requency m ultiplie multiplies

5.2Lower side band [19]19

Q6— Section header —

6.1(4\

6.2.1Directive gain is the ratio of the power density radiated in a particular direction by the antenna to the power density that would be radiated by an isotropic antenna.

6.2.2Radiation resistance is the ratio of the power radiated by antenna to the square of the current at the feed point.

6.2.313

Q7— Section header —

7.1Bode diagrams are an approximation of the frequency and p hase response of RC circuits. (2\

7.2.1Integrating circuit

7.2.28

Topics Identified

Business Plan

Mark Allocation

Sections10 + 30 + 10 + 10 + 19 + 13 + 8 = 100 marks

Paper information

TitleMemo

SubjectCommunication Electronics

LevelN5

Document typeNated Engineering

Year2019

MonthAugust

Pages7

Downloads5

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,627

About Communication Electronics 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.

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File size314.4 KB

Pages7

Archived on8 September 2026

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