2005 Mahatma Gandhi University M.Sc Electronic Science Modern Communication System Question paper for exam preparation. Question paper for 2005 Mahatma Gandhi University M.Sc Electronic Science Modern Communication System Question paper, Exam Question papers 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2012 university in india question papers. SiteMap
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2005 Mahatma Gandhi University M.Sc Electronic Science Modern Communication System Question paper

University Question Papers
2005 Mahatma Gandhi University M.Sc Electronic Science Modern Communication System Question paper
M.Sc. (ELECTRONICS) DEGREE EXAMINATION, JANUARY 2005

First Semester

MODERN COMMUNICATION SYSTEM

Time : Three Hours Maximum : 75 Marks

Answer any six questions from Part A.
Answer any three questions from Part B.
Answer all questions of Part C.

Part A

1. What is modulation? Explain the need of modulation.
2. Compare AM and FM.
3. What is Nyquist rate? Explain.
4. Explain quantization in PCM.
5. Describe a Public Switched Telephone Network.
6. What is trunk circuits, in telephony?
7. What is a geostationary orbit in satellite communication?
8. List the different multiple access methods in satellite communication.
9. Write short note on digital cellular radio.
(6 X 2 = 12 marks)

Part B

10. Explain a method of DSBSC-AM generation.
11. Draw neat diagram and explain the working of PAM generator and detector.
12. Explain an electronic telephone exchange switching system.
13. Explain the roles of base station antenna and mobile antenna in mobile communication.
14. Brief on hybrid microwave system.
(3 X 5 = 15 marks)

Part C

15. (a) Explain three different ways of generating SSBSC-AM, using balanced modulator.
Or
(b) Explain indirect form of FM generation. Describe FM demodulation using discriminator.
16. (a) Explain the principle of Amplitude shift keying. With help of circuit diagram, explain ASK generation.
Or
(b) Explain with diagram, generation and demodulation of PSK. What are the advantages of DPSK over PSK?
17. (a) With diagram, explain a four-wire terminating set in telephony.
Or
(b) Explain how connection is made in telephony using step-by-step switching.
18. (a) Explain transmission path ‘d’ in satellite communication. Derive equation for ‘d’. What is the condition for minimum path?
Or
(b) Explain the multiple access methods TDMA and FDMA in mobile communication.
(4 X 12 = 48 marks)




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