PTU Punjab Technical University B-Tech May 2019 Question Papers 5th Semester Automation Robotics Engineering (ECE-EIE)
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech. (Automation & Robotics) (2011 & Onwards)/
B.Tech. (Electronics & Electrical) (2011 onwards)/
B.Tech. (Electronics & Electrical) (2013 Onwards)
(Sem.?5)
COMMUNICATION SYSTEM
Subject Code : BTEEE-501
M.Code : 70481
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.
SECTION-A
1.
Answer briefly :
a) Sampling
b) Noise figure
c) Synchronous and asynchronous modulation
d) FM broadcast transmitter
e) Image rejection
f) TRF receiver
g) Hoffman code
h) Modems
i) PCM
j) FSK
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SECTION-B
2.
Define modulation. Describe various modulation systems.
3.
An angle modulated signal with carrier frequency
5
= 2?10 is described by the
c
equation
(t) 10 cos ( t 5sin 3000t 10sin 2000 t)
EM
c
a) Find the power of the modulated signal.
b) Find the frequency deviation.
c) Calculate the deviation ratio.
4.
Explain the directional capability of data exchange.
5.
Describe low level and high level AM transmitter with the help of suitable diagrams.
6.
Explain the principle and working of super heterodyne receiver.
SECTION-C
7.
What do you mean by multiplexing? Describe various data multiplexing techniques in
detail.
8.
Write a note on SSB transmitter and receiver.
9.
Explain various elements of communication systems in detail.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 04 November 2019