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.
Does FM signal have infinite bandwidth justify your answer?
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.
Why is AM radio bad quality?
AM stands for Amplitude Modulation and has poorer sound quality compared with FM, but it is cheaper to transmit and can be sent over long distances — especially at night. The lower frequencies of the band we use for AM signals creates a wavelength that is extremely large.
What is the major advantage of FM over AM?
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.
What is Carson’s rule in FM?
Carson’s Rule defines the approximate modulation bandwidth required for a carrier signal that is frequency-modulated by a spectrum of frequencies rather than a single frequency.