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Gmdss : Element 7 - 499/600
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In FM communications, the information is applied to the carrier by:
A) Varying the amplitude or the frequency of the carrier, depending on Double or Single-Sideband operations.
B) Varying the frequency of the carrier.
C) Varying only the frequency of the carrier, depending on Double or Single-Sideband operations.
D) Varying the amplitude of the carrier.
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