AM & FM

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Amplitude Modulation :

Amplitude modulation is a modulation technique where the amplitude of a carrier varies depending on the information signal.It is the most common method of broadcasting radio signals. AM radio broadcast signals use lower carrier frequencies, this helps them to travel longer distances. Sometimes, AM signals can be able to bounce off the ionosphere. The distance travelled by the AM is much larger than the FM. Has poor sound quality, but can transmit longer distance.

Frequency Modulation :

In this module, the frequency of the carrier wave is modified according to the signal that carries information. The radio signals have large bandwidth than AM radio signals, which helps to offer much better sound quality. It also enables to transmit stereo signals.Has higher bandwidth with better sound quality.

The equipment requirements of an FM system are costly, whereas AM, with its relatively older technology, relies on less complex and thus cheaper equipment to transmit signals.

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