Engineering BE Electronics and Telecommunication Sem 4 May 2023 2023 EXTC4 Principles Of Communication Engineering Question Paper - Mumbai University | munotes
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Questions asked in this paper
Paper Subject Code: 40825 Principles of Communication Engineer ing
N.B.: (1) Question No 1 is Compulsory
(2) Attempt any three questions out of the remaining five
(3) All questions carry equal marks
(4) Assume suitable data, if required and state it clearly
1 Attempt any FOUR [20]
a What is low level and high level modulation?
b_ Define: a) Signal to Noise Ratio b) Selectivity c) Sensitivity
c Why is VSB amplitude modulation used in television broadcasting?
d What is aperture effect? How to avoid it?
e What is multiplexing? State its advantages
2 a How is FET reactance modulator capable of generating FM signal? Use neat [10]
circuit diagram to explain the same
Derive the wave equation for AM wave. Draw the time domain and frequency [10]
domain representation of AM wave
3 the working of ratio detector as FM demodulator. What are its [10]
What is sampling? State and prove sampling theorem for low pass signals. [10]
4 Explain TDM transmitter and receiver block diagram. [10]
Explain the working of ISB receiver. [10]
5 Define noise factor and noise figure. Determine the overall noise factor and [10]
noise figure for three cascaded amplifiers with the following parameters: A
b Explain the working of diode detector. How is practical diode detector different [10]
from diode detector?
6 a_ Explain indirect method of FM generation with the help of relevant phasor [10]
c Compare PAM, PWM and PPM [5]
N.B.: (1) Question No 1 is Compulsory
(2) Attempt any three questions out of the remaining five
(3) All questions carry equal marks
(4) Assume suitable data, if required and state it clearly
1 Attempt any FOUR [20]
a What is low level and high level modulation?
b_ Define: a) Signal to Noise Ratio b) Selectivity c) Sensitivity
c Why is VSB amplitude modulation used in television broadcasting?
d What is aperture effect? How to avoid it?
e What is multiplexing? State its advantages
2 a How is FET reactance modulator capable of generating FM signal? Use neat [10]
circuit diagram to explain the same
Derive the wave equation for AM wave. Draw the time domain and frequency [10]
domain representation of AM wave
3 the working of ratio detector as FM demodulator. What are its [10]
What is sampling? State and prove sampling theorem for low pass signals. [10]
4 Explain TDM transmitter and receiver block diagram. [10]
Explain the working of ISB receiver. [10]
5 Define noise factor and noise figure. Determine the overall noise factor and [10]
noise figure for three cascaded amplifiers with the following parameters: A
b Explain the working of diode detector. How is practical diode detector different [10]
from diode detector?
6 a_ Explain indirect method of FM generation with the help of relevant phasor [10]
c Compare PAM, PWM and PPM [5]
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