What is the full form of FM?
The full form of FM is Frequency Modulation. FM is a method or technique of encoding details about a given analogue or digital signal by changing the frequency of the carrier wave according to the frequency of the modulating signal. Modulating signal is same as a message which has to be transmitted to an electronic signal after being modified.
In Frequency Modulation, the carrier frequency signal is modified to the message signal, whereas the amplitude and phase and amplitude are maintained constant.
Few pieces of information about FM
- FM established in 1930 by Edwin Armstrong, in the US
- The radio wave is known as the carrier wave, but the phase and amplitude-phase continues to remain the same
- Includes greater bandwidth and improved sound quality
- The frequency range of FM is 88 – 108 MHz in the higher spectrum
- Less susceptible to sound.
Use of FM
FM is most often utilized in radio broadcasting. FM provides a high benefit in radio transmission as it has a larger signal-to-noise ratio. It means it results in minimal interference with radio frequencies. It is the crucial reason that many radio stations use FM to broadcast music over the radio.
Advantages of FM
- Less interference and sound.
- Power consumption is less when it is being compared with Amplitude Modulation.
- Guard bands separate adjacent FM channels.
Limitations of FM
- The cost of machinery is high, and it has a wide bandwidth.
- The receiving is a small FM signal.
- For optimal interaction, the antennas must be kept close to FM systems.