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ESE EC 2018 Achiever Study Plan: Communication Systems Quiz 3
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Question 1
When the modulating frequency is doubled the modulation index is halved and the modulating voltage remains constant. This happens when the modulating system is
Question 2
In a frequency modulated (FM) system, when the audio frequency is 500 Hz and audio frequency voltage is 2.4 V, the frequency deviation δ is 4.8 kHz. If the audio frequency voltage is now increased to 7.2 V then what is the new value of deviation?
Question 3
Modulation is used to
1) Separate different transmissions
2) Reduce the bandwidth requirement
3) Allow the use of practicable antennas
4) Ensure that intelligence may be transmitted over long distances
Which of the above statements are correct?
1) Separate different transmissions
2) Reduce the bandwidth requirement
3) Allow the use of practicable antennas
4) Ensure that intelligence may be transmitted over long distances
Which of the above statements are correct?
Question 4
Carson’s rule is (with symbols having their standard meaning)
Question 5
Consider the following features of FM vis-a-vis AM:
1) Better noise immunity is provided
2) Lower bandwidth is required
3) The transmitted power is better utilized
4) Less modulating power is required
Which of the above are advantages of FM over AM?
1) Better noise immunity is provided
2) Lower bandwidth is required
3) The transmitted power is better utilized
4) Less modulating power is required
Which of the above are advantages of FM over AM?
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