Kuvempu University 2011 B.Tech Previous year of analog communication of by k.u.kuniversity - Question Paper

BT-3/DX
ANALOG COMMUNICATION
paper : ECE-203(E)

TIME:THREE HOUR] MAXIMUM MARKS:100

NOTE: (i) ATTEMPT ANY 5 ques..
(II)ALL ques. CARRY EQUAL MARKS.


1. (a) discuss the different classification of noise. 10
(b) Derive an expression for equivalent noise temperature of a cascade of networks
in terms of their individual equivalent noise temperatures. 10

2. (a) discuss the coherent detection of DSBSC waves. 10
(b) What is VSB modulatin and benfits of using VSbmodulation?10

3. (a) discuss the Pre-emphasis and de-emphasis in FM. 10
(b) define Phase locked looped demodulator. 10

4. (a)Explain Radio telephone transmitter. 10
(b) What do you mean by Supehetrodyne receivers? 10

5. (a) What is SSB and benifits of using SSB modulation ? 10
(b) discuss the block diagram of AM transmitte. 10

6. (a) what is the effect of noise on carrier ? 10
(b) What is noise triangle ?10

7. (a) discuss square legal regulations modulation methods. 10
(b) what do you mean by Diode dector with filters ?10

8.Write short notes on the foloowing :
(a) AFC. six
(b) Narrow Band noises. 7
(c) Frequency scintillation. 7

Earning:   Approval pending.