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What are the advantages of FM?

What are the advantages of FM?

The main advantages of FM over AM are:

  • Improved signal to noise ratio (about 25dB) w.r.t. to man made interference.
  • Smaller geographical interference between neighboring stations.
  • Less radiated power.
  • Well defined service areas for given transmitter power.

Why FM is preferred over PM?

Answer: FM has higher bandwidth, due to which it is less affected by noise interference. Hence, the signal quality of FM is better than PM.

What is a frequency modulation system?

A FM system is a special wireless device that helps people hear better in noisy listening situations. FM stands for frequency modulation and uses radio waves to transmit audio signals to the listener. The device is typically used in conjunction with hearing aids but can also be used alone in cases of normal hearing.

What services use FM?

FM is commonly used at VHF radio frequencies for high-fidelity broadcasts of music and speech. Analog TV sound is also broadcast using FM. Narrowband FM is used for voice communications in commercial and amateur radio settings. In broadcast services, where audio fidelity is important, wideband FM is generally used.

What are the advantages and disadvantages of FM?

Advantages and Disadvantages of Frequency Modulation

Advantages Disadvantages
Power Consumption is less as compared to AM. More complicated receiver and transmitter
Adjacent FM channels are separated by guard bands. The antennas for FM systems should be kept close for better communication.

Which is better AM or FM?

FM has better sound quality due to higher bandwidth. AM radio ranges from 535 to 1705 KHz (OR) Up to 1200 bits per second. FM radio ranges in a higher spectrum from 88 to 108 MHz. (OR) 1200 to 2400 bits per second.

What is the main difference between FM and PM?

In FM, the frequency derivation is proportional to the modulating voltage only. In PM, the frequency derivation is proportional to the modulating voltage as well as modulating frequency.

What are the types of frequency modulation?

There are two different types of frequency modulation used in telecommunications: analog frequency modulation and digital frequency modulation.

What is narrowband FM?

Narrow Band FM is a FM signal that only uses a small portion of a normal FM channel. Narrowband FM mainly used in two-way wireless communications.

What is the principle of FM?

FM Theory. The basic principle behind FM is that the amplitude of an analog baseband signal can be represented by a slightly different frequency of the carrier.

Why do we need frequency modulation?

Frequency modulation (FM) Because the frequency of a radio wave is less vulnerable to noise than the amplitude, FM was originally introduced to reduce noise and improve the quality of radio reception. In order to accomplish this, FM radio signals have bandwidth several times that of AM signals.

Why does FM give noiseless?

For the purposes of FM broadcasts, it has been internationally agreed to restrict maximum deviation to 75 kHz on each side of the centre frequency for sounds of maximum loudness. (i) It gives noiseless reception. Noise is a form of amplitude variation and a FM receiver will reject such noise signals.

What is difference between AM and FM?

The main difference between both modulations is that in frequency modulation, the frequency of the carrier wave is modified as per the transmit data, while in amplitude modulation, the carrier wave is modified according to the data.


Example Frequency Ranges Broadcast transmitters for AM, FM and Television use frequencies below 1000 MHz, Wi-Fi uses two bands at higher frequencies – 2.4 and 5GHz. Cellular phones use many different frequencies.

Why is AM radio not used?

The decline in AM audio was due more to regulation than to method of modulation. One aspect of radio not understood by most listeners is the concept of occupied bandwidth, or the amount of spectrum that a station uses to transmit its signal.

Which one is better AM or FM?

What are the three types of modulation?

There are three types of Modulation:

  • Amplitude Modulation.
  • Frequency Modulation.
  • Phase Modulation.

What is wideband FM and narrowband FM?

Narrowband systems typically have lower data rate transmissions, whereas the wideband systems support relatively higher data rate transmissions. Wideband signals are generally greater than 1 MHz in bandwidth. More bandwidth translated into higher data rates, in terms of transmitted and received signal information.

What is difference between narrowband and wideband?

Narrowband systems typically have lower data rate transmissions, whereas wideband systems support relatively higher data rate transmissions. To put simply, wideband systems allow for faster communication.

What are types of FM?

There are different types of FM demodulators including: Slope Detector. Foster-Seeley Discriminator. Ratio Detector.

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