Discussion
Why does an angle-modulated signal permit a saturated output amplifier?
Answer: D
Because the amplitude carries nothing, so distorting or clipping it costs no information and the amplifier can run at maximum efficiency. That single property separates the angle family from every amplitude scheme, where the envelope is the message. Bandwidth is wide rather than narrow. The carrier is present throughout. And the index is frequently far greater than one, as broadcasting's five demonstrates.
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