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A phase modulated wave can be generated from frequency modulator by connecting a ___________ before the modulator and a frequency modulated wave can be generated from phase modulator by connecting a __________ before the modulator.
Detailed Solution for Test: Frequency Modulation - Question 2
The output of FM modulator is of form
After passing the modulating signal through the differentiator we give as the input to the frequency modulator, i.e.
The expression of the output signal will be:
The differentiation of the integral will simply give the original signal.
We get a phase modulated signal which is of the form:
Detailed Solution for Test: Frequency Modulation - Question 4
Frequency Modulation is a modulation in which the frequency of the carrier wave is altered according to the instantaneous amplitude of the modulating signal, keeping phase and amplitude constant.
So, the variation in carrier amplitude and carrier phase does not affect the signal in the receiving end.
Line of sight (LoS) is a type of propagation that can transmit and receive data only where transmit and receive stations are in view of each other without any sort of an obstacle between them. Eg: FM radio, microwave, and satellite transmission.
Frequency Modulation works on the Line of sight propagation.
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