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Unit No:144 Unit Name: Telecommunication Principles, BTEC National Diploma in Engineering
Page
1
of
3
Addu High School Hithadhoo, Addu
Assignment front sheet
Learner name Assessor name
Diwakar Srinivasan
Date issued Completion date Submitted on
20 Feb 2018 06 Mar 2018
Qualification
BTEC Diploma in Engineering
Unit number and title
Unit 144
–
Telecommunication Principles
Assignment title
ASSIGNMENT 3: WHATS STOPPING IT.?
In this assessment, you must be able to apply the characteristics of transmission lines
Criteria To achieve the criteria the evidence must show Task no. Evidence
P7 Explain the effect of primary line constants R, L, G, C on characteristic impedance of a transmission line Task 7 (a,b) Report with calculations P8
Define the concept of angular frequency as applied to transmission lines Task 8
Report with calculations P9
Calculate the characteristic impedance using primary line constants for a) Finite and infinite lengths b) Parallel pair of wires c) coaxial cable Task 9 (a,b,c)
Report with calculations
Learner declaration
I certify that the work submitted for this assignment is my own. I have clearly referenced all resources used in my work. I understand that false declaration is a form of malpractice. Learner signature: Date:
FACULTY OF SCIENCE AND TECHNOLOGY
Level 3 National Diploma in Engineering
Unit No:144 Unit Name: Telecommunication Principles, BTEC National Diploma in Engineering
Page
2
of
3
Assignment brief
Qualification
BTEC Level 3 - Diploma in Engineering
Unit number and title
Unit 144 - Telecommunication Principles
Start date
20 Feb 2018
Deadline
06 Mar 2018
Assessor name
Diwakar Srinivasan
Assignment title
Assignment 3: WHATS STOPPING IT.?
Scenario:
The overall growth in demand for electricity in Maldives is expected to range between 5.6 percent and 6.1 percent annually. To meet this need restrictions have been relaxed to allow private and foreign investment to flow into the energy sector. Siemens with its vast experience of pioneering power and distribution solutions has taken up the contract at Seenu Atoll for transmission of data and voice using Power Line Carriers (PLC) over HV transmission lines of Fenaka Corporation aided by line trap and coupling capacitors. Being the chief engineer (operations )for Siemens stationed at Addu City, kindly perform the following calculations
…
P7
: Explain the effect of primary line constants R, L, G, C on characteristic impedance of a transmission line
Task 7(a)
Explain the term
“
primary line constants
”
of a transmission line?
Task 7(b)
A transmission line operating on 125MHz has an attenuation constant of 0.02, phase constant of 0.75 rad/m and Z
o
= 40
Ω
. Compute the values of R, L, G and C
P8:
Define the concept of angular frequency as applied to transmission lines
Task 8
If the velocity of propagation in a lossless transmission line is 2.5 x 10
8
ms
-1
and capacitance per unit length is 30pF per metre, determine the characteristic impedance of the line, its inductance per unit length and phase constant at 100MHz.?
P9:
Calculate the characteristic impedance using primary line constants for a) Finite and infinite lengths b) Parallel pair of wires c) coaxial cable
Task 9(a)
What is meant by characteristic impedance of a transmission line?
Unit No:144 Unit Name: Telecommunication Principles, BTEC National Diploma in Engineering
Page
3
of
3
Task 9(b)
Determine the characteristic impedance of a parallel pair of wires separated by 10cm and whose conductors have a diameter of 1mm. Assume value of dielectric constant as 1.
Task 9(c)
A coaxial cable has a nominal capacitance of 69pF/m and characteristic impedance of 75
Ω
. If the dielectric constant of insulation is 2.30, and its diameter of its inner conductor is 0.6mm, determine inductance per unit length and diameter of its outer conductor?
Sources of Information / Reference
1.
Schaum’s Outline series
-Theory and Problems of Transmission lines
–
Robert A. Chipman 2.
Transmission lines and Waveguides
–
A.V. Bakshi & U.A. Bakshi (Technical Publications, 2008) ISBN 8184314299,9788184314298 3.
Dodd A
—
The Essential Guide to Telecommunications
–
4
th
edition (Prentice Hall, 2005) ISBN-10: 0131487256 ISBN-13: 978-0131487253 4.
Goleniewski L
—
Telecommunications Essentials
–
2
nd
edition (Addison Wesley, 2006) ISBN-10: 0321427610 ISBN-13: 978-0321427618
This brief has been verified as being fit for purpose
Assessor
Diwakar Srinivasan
Signature Date Internal verifier Signature Date

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