# Does FM signal have infinite bandwidth?

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Like AM, FM also produces sidebands. But unlike AM, which produces a single pair of sidebands for each frequency in the modulating signal, the FM process produces an infinite number of pairs of sidebands for each frequency in the information signal. As a result, the bandwidth occupied by an FM signal is enormous.

The no. of side frequencies in FM would be infinite as the modulation index increases and hence the theoritical BW of FM would be infinite.

## What is the maximum bandwidth allotted for FM wave?

Maximum frequency deviation and the maximum bandwidth allowed for commercial FM broadcast is. Explanation: Maximum frequency deviation allowed for commercial FM broadcast is 75KHz. Therefore approximate bandwidth allowed is 2*75= 150KHz.

## Why does frequency modulation give noiseless reception?

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.