Extra exam question E2B10
Subelement E2, OPERATING PROCEDURES· Group E2B
What aspect of an analog slow-scan television signal encodes the brightness of the picture?
- A.Tone frequency (correct answer)
- B.Tone amplitude
- C.Sync amplitude
- D.Sync frequency
WhyIn analog slow-scan television, the brightness of the picture is encoded as the frequency of an audio tone. In analog slow-scan television, the brightness of each point in the picture is encoded as the frequency of an audio tone, with different frequencies representing different shades from black to white, answer A. It isn't the tone's amplitude or the sync signal's amplitude or frequency that carries brightness information, sync tones exist to mark line and frame timing, not picture content.
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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