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ESE 2021 Technical Quiz || Analog communication: Noise & Bandwidth

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Question 1

An FM signal has a carrier swing of 100 kHz when modulating signal has a frequency of 8 kHz. The modulation index is

Question 2

Amplitude modulation is used for broadcasting because

Question 3

Under ordinary circumstances impulse noise can be reduced in

Question 4

The frequency range of a commercially broadcast FM signal is 88 to 108 MHz with carrier swing of 150 kHz. What will be the percentage modulation of signal?

(Assume that FCC standard for maximum frequency deviation of FM broadcast signal is 90 kHz)

Question 5

Distortion results due to:
i. harmonics of baseband frequencies
ii. mixing of baseband frequencies
iii. baseband frequencies phase shifting
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