Discussion
A baseband signal is one whose spectrum
Answer: B
Baseband means the spectrum sits at the low end, from near direct current up to the highest frequency the message contains. Speech from 300 Hz to 3.4 kHz is the classic example. A spectrum centred on a carrier is passband, which is what modulation produces. A single frequency is a tone. Flat power to the channel limit describes white noise filtered by the channel rather than a baseband message.
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