General exam question G8C14
Subelement G8, SIGNALS AND EMISSIONS· Group G8C
Which of the following describes a waterfall display?
- A.Frequency is horizontal, signal strength is vertical, time is intensity
- B.Frequency is vertical, signal strength is intensity, time is horizontal
- C.Frequency is horizontal, signal strength is intensity, time is vertical (correct answer)
- D.Frequency is vertical, signal strength is horizontal, time is intensity
WhyA waterfall display shows frequency on the horizontal axis, signal strength as intensity, and time on the vertical axis. A waterfall display plots frequency along the horizontal axis, encodes signal strength as color or brightness intensity, and scrolls new time slices vertically as they arrive, answer C. The other combinations swap which axis represents frequency, which represents time, and which represents intensity, none matching how a waterfall display is actually laid out.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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