Discussion
An SSB transmitter is said to have no carrier. What appears at the carrier frequency in practice?
Answer: D
Real modulators are imperfectly balanced, so a small carrier residue remains, typically forty or more decibels below the wanted sideband, and it is specified and trimmed. Perfect suppression is unattainable. A full-power pilot would defeat the purpose, though a small deliberate pilot is used in some systems. And the unwanted sideband appears mirrored about the carrier rather than at it.
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