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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.

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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


When modulation frequency is doubled modulation index also doubled in case of FM or pm or am?

In Frequency Modulation (FM), if the modulation frequency is doubled, the modulation index does not necessarily double; it depends on the amplitude of the modulating signal. In Amplitude Modulation (AM), the modulation index is defined as the ratio of the peak amplitude of the modulating signal to the carrier amplitude, so it remains unchanged with varying modulation frequency. For Phase Modulation (PM), similar to FM, the modulation index is influenced by the amplitude of the modulating signal and does not inherently double with the modulation frequency. Thus, modulation frequency and modulation index are not directly linked in this way for FM, PM, or AM.


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.

Related Questions

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.


What does FM stands for?

Frequency Modulation _____________________________________________________________________ fayetville-manlius


What is the abbreviation for frequency modulation?

" FM " is.


Does modulation schemes depends on frequency?

Modulation schemes depends on frequency.


When modulation frequency is doubled modulation index also doubled in case of FM or pm or am?

In Frequency Modulation (FM), if the modulation frequency is doubled, the modulation index does not necessarily double; it depends on the amplitude of the modulating signal. In Amplitude Modulation (AM), the modulation index is defined as the ratio of the peak amplitude of the modulating signal to the carrier amplitude, so it remains unchanged with varying modulation frequency. For Phase Modulation (PM), similar to FM, the modulation index is influenced by the amplitude of the modulating signal and does not inherently double with the modulation frequency. Thus, modulation frequency and modulation index are not directly linked in this way for FM, PM, or AM.