

MCQOPTIONS
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1. |
If a modulating signal with frequency fm amplitude modulates a carrier of frequency fc (where fc fm), the frequencies present at the output of AM is/are (with carrier). |
A. | fc, fc ± fm |
B. | ± fm only |
C. | fc + 2 fm |
D. | fc - fm only |
Answer» B. ± fm only | |