Communication 1 1559

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TH

3.3 SUBJECT TITLE : COMMUNICATION SYSTEMS - I (1559)

• Year : Third Year

• Teaching and Examination Scheme:

TEACHING SCHEME EXAM SCHEME & MAXIMUM MARKS

THEORY

HRS/WEEK

PRACTICAL

HRS/WEEK

PAPER

HRS.TH PR OR TW SW

2 2 3 100 50 - - 50

• RATIONALE :

To teach the students facts, concepts, principles, procedures of communicationsystems, so that students can use the knowledge to install & troubleshoot the different

audio & video communication systems.



CONTEXT IN THE FORMOF LINK DIAGRAM SHOWING

INTERRELATIONSHIP OF SUBJECT AREA

HUMAN SCIENCES

Communication skills

Generic SkillsIndustrial organization

& SupervisoryManagement

ENGINEERING SCIENCES

Engineering DrawingsEngineering MechanicsBasic Electronics

Electronics materials &components

CORE TECHNOLOGY

SUBJECTS

Information TechnologyWorkshop PracticeElectrical Engineering

ElectronicMeasurements &Instruments

Applied Electronics

Digital Techniques &Applications

Linear IntegratedCircuits

Power Electronics

TECHNOLOGY

SUBJECTS

Microprocessor &Microcontroller Communication

Systems I

IndustrialElectronics

CommunicationSystems II

Instrumentation &Control Systems

DigitalCommunication

Systems

BASIC SCIENCE

AppliedMathematics

Applied Physics

AppliedChemistry

JOB PROFILE

Self Developer Membership of

Family/Community/Nation

Life long learningTechnician in

industry asMaintenanceEngineer,investigator or Designer R & DTechnician

Entrepreneur

CURRICULUM

OBJECTIVES

Attitude for personalDevelopment

Social skill for socialDevelopment

Continued learningskill for life long

learningTechnical skill for

industrial activityearning to livedomain

Supervisoryskill,Investigation &Design skill

Testing skillDecision makingskillPlanning &scheduling skill



DETAILED CONTENTS: 3.3

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1 Hi Fi Audio Amplifier

1.1 Audio Amplifier (Definition & Types)

1.1.1 Voltage Amplifier (Circuit Diagram & Description)

1.1.2 Power Amplifier with circuit diagram & description

1.2 Introduction to Amplifiers: Mono, Stereo, Public Address.

1.3 Difference between stereo amplifier & Hi Fi amplifier.

1.4 Block diagram of Hi Fi amplifier & explanation

1.5 Controls available on it & its function & other facility available

on it like (Mic in, Aux.in, earphone in)

1.6 Graphic equalizer concept, circuit diagram and operation.

1.7 Dolby NR recording system1.8 Cross over network circuit & its function

1.9 Types of speaker – its comparison only I) woofer, II) Mid-range,

III) Tweeter.

Practicals

1. Study and observe the given component layout of a Hi Fi

amplifier system.

2. Trace the output stage of given Hi Fi amplifier system.

3. Voltage analysis of a given Hi Fi amplifier.

4 to 6. Fault Finding (three different faults) in a Hi Fi Audio

amplifier:

a) by Signal injection method.

b) Confirmation of faulty stage by voltage

Analysis method.

7. To plot frequency response of graphic equalizer.

16 8

2 CD player

2.1 CD – material used , size

2.2 Principle & working of detection used in CD player.

2.3 Component used for CD mechanism. I) CD pick-up assembly, II)

gear system, III) drive motors, IV) CD lens, V) Cushion CD

mechanism.

2.4 Block diagram of CD player & explanation.2.5 Function of controls.

2.6 Parts, function of remote control (transmitter unit) & function of

receiver used in CD player.

2.7 Advantages of fluorescent display system used in CD player.

2.8 Amplifier circuit operation.

2.9 Introduction to VCD player. (Block Diagram)

Practicals

8. Draw and study drive mechanism layout of CD Player.

12 8

3 TV Fundamentals

3.1 Concept & explanation of following: Aspect ratio, image

continuity, interlace scanning, scanning periods – horizontal &vertical, vertical resolution, horizontal resolution.

12 4



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3.2 Vestigial sideband transmission, bandwidth for colour signal,

brightness, contrast, viewing distance luminance, hue, saturation,compatibility.

3.3 Colour theory, primary colours & secondary colours, Grassman’s

law, additive colour mixing subtractive colour mixing.

Practicals :

NIL.

4 Composite Video Signal

4.1 Explain with waveform : Pedestal height, Blanking pulse, Colour

burst, Horizontal sync pulse details, Vertical sync pulse details,

Equalizing pulses, CCIR B standards for colour signal

transmission & reception.

4.2 TV channel allocation for band I & band III

Practicals :

NIL.

12 4

5. TV Transmitters

5.1 Audio and Video signal transmission

5.2 Positive and Negative modulation

5.3 Merits and Demerits of Negative modulation

5.4 Pre-emphasis and De-emphasis

5.5 Introduction to camera tube

5.6 Block diagram of monochrome TV transmitter (Function of each

black)5.7 Block diagram of colour TV transmitter.

12 03

6 Colour TV

6.1 Block diagram of monochrome TV Receiver.

6.1 Block Diagram & operation of colour TV receiver (PAL D type)

6.2 Colour Picture tube PIL gun tube- working principle, purity &

static convergence, convergence errors, automatic Degaussing,

Deflection unit, Pincushion correction techniques.

6.3 Block diagram of a PAL D receiver (Explanation also). Explain –

Yagi Uda Antenna

6.4 Explain block diagram of PAL-D decoder. Explain the working

with circuit diagram of chroma signal amplifier, Burst pulse blanking, Colour killer control, Separation of U & V signals,

Explanation with circuit diagram. ACC Amplifier.Explain the

circuit of Burst phase Ident amplifier & Colour Killer generation

& the 900 phase shifting & 1800 PAL switch circuits colour

signal matrixing, RGB drive amplifiers.

6.5 EHT generation: circuit explanation for line output stage using

transistor or IC in colour TV. Explain generation of high voltage.

Altar connection.

6.6 Use of following :

Microcontroller, Memory, A/V switch, Remote control receiver

ckt.Practicals

24 25



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9. Tracing of chroma section in given TV receiver.

10. Tracing of picture tube and video amplifier in given TVreceiver with multimeter.

11. Tracing of horizontal section in given TV receiver with

multimeter.

12. Voltage analysis of picture tube, chroma section and

horizontal section.

13 to 18. Fault finding in given colour TV :

13. a) No colour

b) Red colour only.

14. a) Blue colour only.

b) Green colour only.

15. a) Magentena colour only. b) Cyan only.

16. a) Yellow only.

b) No raster.

17. a) Fault in HSYNC section.

b) Fault in VSYNC section.

18. Fault in SYNC seperator.

7 Cable Television

7.1 Working principle & specification of following components.

1. Dish antenna

2. LNA (Low Noise Amplifier)3. Multiplexer (used for different signal to transmit, like – any

note below the picture scene.)

4. Attenuator

5. Connector (two way, three way)

6. Amplifier

7. Cable.

7.2 Design concepts for cable T.V. N/W

7.3 Block diagram & working principle of dB meter.

7.4 Block diagram of satellite TV receiver (earth station) & operation

of each block.

Practicals19. Draw and study layout diagram for distribution of cable

connection for master antenna TV.

20. Study of satellite TV antenna.

12

12

IMPLEMENTATION STRATEGIES :

1. Conduct practicals after theory covered in class.

2. Conduct minimum 18 experiments.



REFERNCES :

Sr.Author Title Edition

Year of

Publication

Publisher &

Address

1 DhakeTelevision & Video

Engineeering2nd 1996

Tata McGraw

Hill, New Delhi.

2 R.R. Gulati Modern TV practice 1st 1991Wiley Eastern

Ltd.,London

3 Nickbeer

Servicing Audio &

Hi-Fi equipment. 1

st

1994

Tata McGraw

Hill, New Delhi

4 LotiaModern CD Players

servicing manualRevised

BPB

Publication,

New Delhi.

5 John D. Lenk Compact Disk CD

Player

PHI

International

Documents

Communication 1 1559