Kurukshetra University 2010 B.Tech Electronics and Communications Engineering Analog Communication - Question Paper

Analog Communication
ECE-203E

time:three hours] [maximum marks:100

note:-(a) attempt any 5 ques..
(b) 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 network in terms of
their individual equivalent noise temperatures. [10]

2. (a) discuss the coherent detection of DSBSC waves. [10]

(b) what is VSB modulation and benefits of using VSB modulation? [10]

3. (a) discuss the pre-emphasis and de-emphasis in FM. [10]

(b) define phase locked looped demodulator. [10]

4. (a) discuss radio telephone transmitter. [10]

(b) what do you mean by superheterodyne receivers? [10]

5. (a) what is SSB and benefits of using SSB modulation? [10]

(b) discuss the block diagram of AM transmitter. [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 detector with filter? [10]

8. write short notes on the following:

(a) AFC. [6]

(b) narrowband noise. [7]

(c) frequency scintillation. [7]

Earning:   Approval pending.