Fundamentals of Communication Engg - May 2013

Electronics Engineering (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Explain elements of communication.(5 marks) 1 (b) Explain Short Noise.(5 marks) 1 (c) Explain modulation index for AM and FM.(5 marks) 1 (d) Sky wave propagation.(5 marks) 2 (a) Explain balaced modulator.(10 marks) 2 (b) Explain:-
(i) VSB system
(ii) ISB system(10 marks) 3 (a) What is the need of superheterodyne radio reciever.(10 marks) 3 (b) Explain indirect FM generation method.(10 marks) 4 (a) Explain noise triangle in FM.(10 marks) 4 (b) Explain time division multiplexing.(10 marks) 5 (a) Explain pulse code modulation system.(10 marks) 5 (b) Explain PPM, PWM.(10 marks) 6 (a) Explain adaptive delta modulation.(10 marks) 6 (b) Explain Quantization.(10 marks)

Write short notes on:-

7 (a) Line coding.(5 marks) 7 (b) Tracking in radio reciever.(5 marks) 7 (c) Sampling Theorem.(5 marks) 7 (d) Companding.(5 marks)