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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Q. The maximum shift in frequency is 3 kHz and the minimum and maximum deviation in frequency of the actual signal are 149.97 MHz and 150.03 MHz. What is the carrier frequency?

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Q. The value of a change in frequency of the carrier wave by the modulating signal is called as?

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