What is the Full Form of FM?

The full form of FM is frequency modulation. FM is a method or technique for encoding information about a particular analogue or digital signal by altering the frequency of the carrier wave in response to the frequency of the modulating signal. A modulating signal is analogous to a message that must be conveyed to an electrical signal after it has been modified.

The carrier frequency signal is adjusted to become the message signal in Frequency Modulation, while the phase and amplitude remain constant.

Advantages of FM

• There is less noise and interference.
• When compared to Amplitude Modulation, power usage is lower.
• Guard bands are used to separate adjacent FM channels.

Disadvantages of FM

• The cost of machinery is high, and it has a wide bandwidth.
• For optimal interaction, the antennas need to be kept close to FM systems.
• The receiver is a small FM signal.

Use of FM

FM is most commonly heard in radio broadcasting. FM is beneficial in radio transmission because it offers a higher signal-to-noise ratio, implying less interference with radio frequencies. Because of this reason, all radio stations choose to broadcast music over the radio using FM.

Facts about FM

• FM was established in the United States by Edwin Armstrong in 1930.
• The carrier wave is the radio wave, but the phase and amplitude-phase stay constant.
• Increased bandwidth and sound quality are also offered.
• In the upper band, FM has a frequency range of 88 to 108 MHz.
• Sound sensitivity is less.

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