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Amplitude Modulation (AM) and Frequency Modulation (FM)

AM tuning changes the amplification size of the waves being received, FM tuning controls the frequency of the waves being received.

As commercial radio rose from it's early form, the AM 'band' stood for years as the only type of radio available. As technology improved, engineers discovered that they could modulate 2 channels of higher quality sound inside of one carrier frequency. The Federal Communications Commission designated from 87 MHz to 108 MHz for the new FM format. And, with this, FM radio was born.

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14y ago

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