Hindustan Institute of Technology and Science (HITE) 2008 B.E Computer Science ANALOG AND DIGITAL COMMUNICATION - Question Paper

ANALOG AND DIGITAL COMMUNICATION
PART A:
1.Define amplitude modulation?
2.Describe the basic operation of an Am modulator?
3.What is meant by RF?
4.How many inputs are there to an amplitude modulator?What are they?
5.What is meant by repetition rate of the AM Envelop?
6.Describe the upper and lower sidebands and upper,lower side frequencies?
7.Define modulation coefficient and percent modulation?
8.What does AM-DSBFC stand for?
9.What is meant by a front end of a receiver?
10.Define fidelity?

PART B:
11.(a)Explain the power distribution in AM?
OR
(b)Describe low level modulator with circuit diagram?
12.(a)Describe medium power modulator with circuit diagram?
OR
(b)Describe low level transmitters with a block diagram?
13.(a)Describe high level transmitters with a block diagram?
OR
(b)Explain receiver parameter?
14.(a)Define coherent and non coherent detection.Describe TRF with diagram?
OR
(b)Describe Super heterodyne receiver operation?
15.(a)Explain image frequency rejection with a neat diagram?
OR
(b)Explain double conversion AM receiver with filtering requirements?

Earning:   Approval pending.