Q. What is the signal to noise ratio if the maximum allowable frequency deviation is 4 kHz and the frequency deviation by noise is 156.42 Hz?

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Q. What is the ratio of the shift produced by the noise to the maximum allowed deviation if the modulating frequency is 300 Hz and the phase shift by noise is 25° and the maximum allowable deviation is 5 kHz?

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Q. Calculate the phase difference by noise if the Signal to noise ratio is 7:2.

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Q. What is the frequency deviation produced by noise if the modulating frequency is 400 Hz and the phase difference introduced by noise is 0.43 rad?

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Q. What is the noise to signal ratio if the phase shift introduced by noise is 0.75°?

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Q. What is the frequency deviation produced by noise if the signal to noise ratio is 3:1 and modulating frequency is 800 Hz?

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Q. Noise introduces a frequency variation into the signal.

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Q. Which circuit in FM receivers cancels or filters out noise?

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Q. Which of the following is not a source of noise in FM?

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Q. According to Carson’s rule, what is the bandwidth of the signal with a deviation of 30 kHz and a maximum modulating signal of frequency 5 kHz?

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Q. What is the number of significant sidebands produced when the bandwidth of the signal is 24 kHz and the modulating frequency is 3 kHz?

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Q. What is the modulation index for the FM to behave as a narrowband?

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Q. What is it called when an FM signal occupies no more spectrum space than AM signal?

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Q. What is the deviation ratio if the maximum deviation is 25 kHz and the maximum modulating frequency is 15 kHz?

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Q. What is the modulation index of a system with modulating frequency 75 kHz and maximum frequency deviation 15 kHz?

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Q. What is the ratio of frequency deviation to the modulating frequency is known as?

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Q. Which of the following is false with respect to Pulse modulation?

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Q. FM and PM are more susceptible to noise than AM signals.

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Q. What type of modulation uses discrete values of carrier frequencies to transmit binary data?

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Q. The frequency of modulating signal has no effect on the amount of frequency deviation of a carrier signal in FM.

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