Discussion
Which property makes AM attractive despite its power inefficiency?
Answer: B
Receiver simplicity is the whole case for it: a diode, a capacitor and a resistor recover the message, needing no local reference and no phase tracking, which made mass broadcasting possible. AM is notably vulnerable to impulse noise rather than immune. Its transmitted power rises with modulation depth. And single sideband is narrower, so AM cannot claim the narrowest bandwidth.
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