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Sathyabama Institute of Science and Technology B.E. - Electronics and Communication Engineering Part Time SECA1303 Analog Communication Syllabus

SATHYABAMA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL OF BUILDING AND ENVIRONMENT

SECA1303 ANALOG COMMUNICATION SYSTEMS
L T P Credits Total Marks
3 0 0 3 100

UNIT 1 AMPLITUDE MODULATION AND DEMODULATION 9 Hrs.
Need for modulation - Model of communication system and classification, Representation of AM - Modulation index and
power calculation - Types of AM; DSB-FC: Collector and base modulation circuits, square law modulator- DSB-SC:
Balanced modulator circuit using FET - SSB: Filter method and phase shift method - VSB, Comparison of various AM
schemes - AM transmitter: Low level and high level Modulation. Demodulation - Envelope detector, Significance of RC time
constant - Square law detector.

UNIT 2 ANGLE (FM and PM) MODULATION AND DEMODULATION 9 Hrs.
Single tone FM: Mathematical representation, frequency spectrum and bandwidth- Multi-tone FM - NBFM and WBFM -
Phase modulation (PM): Mathematical representation - Conversion: FM to PM and PM to FM – Comparison of AM, FM and
PM- FM Generation: Direct method using Varactor diode and indirect method (Armstrong modulator) - Pre-emphasis - FM
transmitter. FM Detector: Balanced slope detector, Foster seeley frequency discriminator and Ratio detector - De- emphasis.

UNIT 3 ANALOG PULSE MODULATION AND MULTIPLEXING 9 Hrs.
Sampling theorem – Types of sampling-Concepts of PAM, PWM, PPM and PCM- Modulators and demodulators. Types of
Multiplexing- Frequency Division Multiplexing, Time Division Multiplexing and Quadrature Multiplexing - Comparison of
multiplexing.

UNIT 4 ANALOG RECEIVERS AND NOISE 9 Hrs.
AM Receivers: TRF receivers -Super heterodyne receivers - FM Receivers: FM stereo broadcast receivers - AFC - Capture
effect, FM threshold effect. Communication Receivers: Sensitivity, fidelity and selectivity - Squelch circuit - Beat frequency
Oscillator-Types of Noise- Noise factor and noise temperature for cascaded amplifier (Friis formula)- Noise in AM and FM
systems.

UNIT 5 COMMUNICATION SYSTEMS 9 Hrs.
Telephone Systems-Electronics Telephone and cellular Telephone System - Fax-Television Systems-Scanning-camera tube
and Transmitter, Picture tube and Receiver, CCTV and Set top box.
Max. 45 Hrs.

COURSE OUTCOMES
On completion of the course, student will be able to
CO1 - Explain the Functional blocks of communication system, modulation techniques and various noise sources and
types.
CO2 - Analyze AM, FM, PM, PAM, PDM, PPM and PCM using mathematical equations and demonstrate their modulation
and demodulation techniques.
CO3 - Illustrate sampling theorem and explain the importance of various multiplexing techniques.
CO4 - Demonstrate the working of AM and FM transmitters, Receivers and communication Systems.
CO5 - Performance evaluation and selection of appropriate modulation technique for real time applications.
CO6 - Working of Analog Communication Receivers and Telephone and Television Systems.

TEXT / REFERENCE BOOKS
1. R.P. Singh Sanjay Sharma, “Analog Communication Systems”, 2009.
2. B.P.Lathi, “Modern Digital and Analog Communication Systems”, 3rd Edition, Oxford University Press, 2007.
3. Deshpande, N.D., "Communication Electronics", Tata McGraw Hill Publishers,1989.
4. Louis. E. Frenzel, "Communication Electronics Principles and Applications”, 3rd Edition, Tata McGraw Hill, 2002.
5. Dennis Reddy and John Coolen, "Electronic Communications", 4th Edition, Prentice Hall Publishers, 1995.
6. Kennedy, "Electronic Communications Systems", 4th Edition, McGraw Hill Publishers, 1992.
7. R.Gulati, “Monochrome and Colour Television”, 2nd Edition, New Age International, 2005.

END SEMESTER EXAMINATION QUESTION PAPER PATTERN
Max Marks: 100 Exam Duration: 3 Hrs.
PART A: 10 Questions of 2 marks each – No choice 20 Marks
PART B: 2 Questions from each unit of internal choice, each carrying 16 marks 80 Marks