Extra exam question E2B05
Subelement E2, OPERATING PROCEDURES· Group E2B
Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?
- A.The vestigial sideband carries the audio information
- B.The vestigial sideband contains chroma information
- C.Vestigial sideband reduces the bandwidth while increasing the fidelity of low frequency video components (correct answer)
- D.Vestigial sideband provides high frequency emphasis to sharpen the picture
WhyVestigial sideband transmission reduces bandwidth compared to full double sideband while preserving good fidelity for the low-frequency video components carried in the retained partial sideband. Keeping part of the lower sideband intact in a vestigial sideband transmission, rather than filtering it out completely the way true single sideband does, preserves the low-frequency video information (large-area brightness detail) with better fidelity while still cutting the transmission's overall bandwidth compared to sending both full sidebands, answer C. It doesn't carry the audio, it isn't where chroma information lives, and it doesn't add high-frequency emphasis, that's a different picture-sharpening technique.
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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