Test: Analog Communication - 1


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15 Questions MCQ Test GATE ECE (Electronics) 2023 Mock Test Series | Test: Analog Communication - 1

Test: Analog Communication - 1 for Electronics and Communication Engineering (ECE) 2022 is part of GATE ECE (Electronics) 2023 Mock Test Series preparation. The Test: Analog Communication - 1 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Analog Communication - 1 MCQs are made for Electronics and Communication Engineering (ECE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Analog Communication - 1 below.
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Test: Analog Communication - 1 - Question 1

Synchronous detector is used for demodulation of any signal when the modulation index is

Test: Analog Communication - 1 - Question 2

Which of the following system is affected by quadrature null effect?

Test: Analog Communication - 1 - Question 3

If a FM transmitter radiates signal with power Pt and modulation index β then

Test: Analog Communication - 1 - Question 4

Which of the following systems have less figure of merit?

Test: Analog Communication - 1 - Question 5

Which of the following modulations is preferred for voice communication?

Test: Analog Communication - 1 - Question 6

Which of the following system cannot achieve maximum power efficiency compared to others?

Test: Analog Communication - 1 - Question 7

In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 1000 kHz will be

*Answer can only contain numeric values
Test: Analog Communication - 1 - Question 8

The antenna current of an AM transmitter is 10 A when the carrier is alone transmitted and is increased to 11 A after modulation.

The power efficiency of the above AM transmitter is____________________ (%)


Detailed Solution for Test: Analog Communication - 1 - Question 8

*Answer can only contain numeric values
Test: Analog Communication - 1 - Question 9

Input to the matched filter is x(t),which is shown in figure. The value of impulse response of matched filter at t = 5.4 sec is__________________________________________________


Detailed Solution for Test: Analog Communication - 1 - Question 9



Test: Analog Communication - 1 - Question 10

The set up shown below is used to convert a Narrow Band FM signal with modulation index = 0.6 to a wide Band FM Signal with frequency deviation equal to 600 KHz and carrier frequency of 12.5 MHz. Then determine nlr n2.

Detailed Solution for Test: Analog Communication - 1 - Question 10

Test: Analog Communication - 1 - Question 11

A single tone signal 14Cos(40π x103t) is used to modulate a carrier Accoswct. Then determine the number of channels available in very high frequency (VHF) band for this signal, if amplitude modulation and frequency modulation scheme employs respectively {Assume sensitivity of FM modulator = 10KHz/V}

Detailed Solution for Test: Analog Communication - 1 - Question 11

VHF band (30MHz - 300MHz)

Total Bandwidth available = 2700MHz

Bandwidth of AM signal = 

Bandwidth of FM signal =

Total number of channels available for AM Signal =

for FM Signal =  

Test: Analog Communication - 1 - Question 12

Determine Bandwidth of signal y(t) in the figure shown below.

Detailed Solution for Test: Analog Communication - 1 - Question 12

Test: Analog Communication - 1 - Question 13

For the figure shown below, what should be minimum bandwidth of channel such that the signal x(t) & y(t) can be transmitted through channel simultaneously without any distortion?

Detailed Solution for Test: Analog Communication - 1 - Question 13

Minimum Bandwidth required = 1400-100 = 1300Hz

m1(t) = sinc1(200t) ;        = 200Hz

fc2 = 1000Hz

Test: Analog Communication - 1 - Question 14

A carrier signal Accosukt is frequency modulated using a message signal 3cos103nt. If the signal to noise ratio at input and output of the receiver are found to be 20dB and 40dB respectively, then determine sensitivity of frequency modulator.

Detailed Solution for Test: Analog Communication - 1 - Question 14

Test: Analog Communication - 1 - Question 15

What will be sensitivity of modulator shown below, if its depth of modulation is

0.4 and x(t) = cos (340nt) ?

Detailed Solution for Test: Analog Communication - 1 - Question 15

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