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Analog Communication MCQs
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Analog Communication MCQs
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25 Questions

1. The range of modulating frequency for Narrow Band FM is
2. Low frequency noise is
3. Bandwidth (B) of an AM signal is given by
4. In synchronous detection of AM signal
5. FM is disadvantageous over AM signal because
6. In terms of signal frequency (fs) and intermediate frequency (fi), the image frequency is given by
7. What is the change in the bandwidth of the signal in FM when the modulating frequency increases from 12 KHz to 24KHz?
8. An AM signal has a total power of 48 Watts with 45% modulation. Calculate the power in the carrier and the sidebands.
9. Calculate the maximum frequency deviation for the FM signal v(t) = 10 cos (6000t+ 5sin2200t)
10. Disadvantage of using a DSB or SSB signal modulation is
11. Standard intermediate frequency used for AM receiver is
12. Figure of merit γ is
13. Calculate the power in one of the side band in SSBSC modulation when the carrier power is 124W and there is 80% modulation depth in the amplitude modulated signal.
14. At a room temperature of 300K, calculate the thermal noise generated by two resistors of 10KΩ and 30 KΩ when the bandwidth is 10 KHz and the resistors are connected in parallel.
15. Change in instantaneous phase of the carrier with change in amplitude of the modulating signal generates
16. The ratio of actual frequency deviation to the maximum allowable frequency deviation is called
17. Phase-locked loop can be used as
18. Frequency components of an AM wave (m = modulation index) are
19. If a receiver has poor capacity of blocking adjacent channel interference then the receiver has
20. Advantage of using direct method for generation of FM signal is
21. What is the carrier frequency in an AM wave when its highest frequency component is 850Hz and the bandwidth of the signal is 50Hz?
22. Sine wave is a
23. At a room temperature of 300K, calculate the thermal noise generated by two resistors of 10KΩ and 20 KΩ when the bandwidth is 10 KHz.
24. Requirements of synchronous detection of AM signal are:
25. Determine the Bandwidth of a FM wave when the maximum deviation allowed is 75KHz and the modulating signal has a frequency of 10KHz.

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