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It is a device or electronic circuit that changes the frequency of an oscillator according to the amplitude of modulating signal. For instance, if the modulation is linear, the modulator changes the frequency proportional to the amplitude of the modulating voltage.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoFrequency modulation is a method of impressing an audio frequency signal onto a radio frequency carrier wave, by changing the frequency of the carrier wave in response to the audio wave. The simplest method of doing this is to incorporate a microphone with its diaphragm attached to one of the plates of a capacitor and the other plate fixed. The microphone changes capacitance in response to audio vibrations. The microphone capacitor is part of the resonant circuit of an oscillator, and causes the oscillator output frequency to vary in response to the vibration of the microphone
Wiki User
∙ 8y ago"Frequency modulation" means that the frequency of a base wave is changed slightly, i.e. increased and decreased, to transmit information.
Wiki User
∙ 14y agofreqency range of freqency modulation?
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What is Modulation index in Frequency modulation?
Modulation Index is the ratio of the maximum deviation frequency to the frequency of modulation. In other words it is the ratio of the spread in frequency spectrum to the frequency that was used to modulate the carrier. For FM, modulation index is given by the formula mf= df/f where, mf=modulation index for FM df=difference in carrier frequency f=frequency of the signal
What is the deviation ratio for frequency modulation?
Deviation ratio: In a frequency modulation system, the ratio of the maximum frequency deviation of the carrier to the maximum modulating frequency of the system under specified conditions
In which Analog to analog modulation methods does the peak amplitude?
Frequency modulation Phase modulation
Why is amplitude modulation susceptible to noise but not frequency modulation?
because noise usually changes the amplitude not frequency.
How do you differentiate FM from PM signal?
A: FM means frequency Modulation meaning the frequency remain the same. pulse modulation the frequency can vary
What does FM stand for in radio frequency?
FM means Frequency Modulated.FM stands for modulation on frequency or frequency modulation.
What is the difference between frequency modulation and phase modulation?
The difference between frequency modulation and phase modulation is that with frequency modulation the angular frequency of the signal is modified while with the phase modulation, the phase angle of the signal is modified.
What does AM and FM stand for in radios?
AM - Amplitude Modulation FM - Frequency Modulation
What is Modulation index in Frequency modulation?
Modulation Index is the ratio of the maximum deviation frequency to the frequency of modulation. In other words it is the ratio of the spread in frequency spectrum to the frequency that was used to modulate the carrier. For FM, modulation index is given by the formula mf= df/f where, mf=modulation index for FM df=difference in carrier frequency f=frequency of the signal
What is the meaning of FM in FM Radio?
FM means frequency modulation AM means amplitude modulation
What is the relationship between frequency modulation and the frequency carrier to the modulation index in the AM modulation?
fc>2fm
When modulation frequency is double the modulation index is halF and the modulating voltage remains constant the modulation system is?
frequency modulation..
Define modulation and modulation index?
a measure of the degree of frequency modulation expressed numerically for a pure tone modulation as the ratio of the frequency deviation to the frequency of the modulating signal.
Does modulation schemes depends on frequency?
Modulation schemes depends on frequency.
What does FM stands for?
Frequency Modulation _____________________________________________________________________ fayetville-manlius
Amplitude modulation and frequency modulation range in India?
Normal frequency range for amplitude modulation is 550kHz to 1610kHz
Comparison of amplitude modulation and frequency modulation?
Amplitude of the (high frequency) Carrier signal is varied with respect to low frequency of message signal is called amplitude modulation. Frequency of the carrier signal is varied with respect to low frequency of message signal is called frequency modulation.
