Extra exam question E8D03
Subelement E8, SIGNALS AND EMISSIONS· Group E8D
Which describes spread spectrum frequency hopping?
- A.If interference is detected by the receiver, it will signal the transmitter to change frequencies
- B.RF signals are clipped to generate a wide band of harmonics which provides redundancy to correct errors
- C.A binary bit stream is used to shift the phase of an RF carrier very rapidly in a pseudorandom sequence
- D.Rapidly varying the frequency of a transmitted signal according to a pseudorandom sequence (correct answer)
WhySpread spectrum frequency hopping rapidly varies the frequency of a transmitted signal according to a pseudorandom sequence. Spread spectrum frequency hopping works by rapidly varying the transmitted signal's actual frequency according to a pseudorandom sequence known to both the transmitting and receiving stations, spreading the signal's energy across many different frequencies over time rather than at once, answer D. It doesn't rely on the receiver signaling the transmitter to change frequency reactively, doesn't involve clipping a signal to generate harmonics, and doesn't describe shifting carrier phase, that's direct sequence spreading instead.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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