Discussion
Which measurement distinguishes carrier suppression from sideband suppression?
Answer: C
The two residues appear at different frequencies: the carrier residue exactly at the suppressed carrier, the sideband residue mirrored on the other side of it, so a spectrum display separates them immediately. A single tone suffices for both. The units are a matter of presentation. And a power meter cannot resolve either, which is why the measurement is spectral.
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