Extra exam question E2D05
Subelement E2, OPERATING PROCEDURES· Group E2D
What is the characteristic of the JT65 mode?
- A.Uses only a 65 Hz bandwidth
- B.Decodes signals with a very low signal-to-noise ratio (correct answer)
- C.Symbol rate is 65 baud
- D.Permits fast-scan TV transmissions over narrow bandwidth
WhyJT65's defining characteristic is its ability to decode signals at a very low signal-to-noise ratio. JT65's defining characteristic is its ability to decode signals at an extremely low signal-to-noise ratio, well below what's readable by ear, by using a narrow-bandwidth, slow-symbol-rate design with heavy forward error correction, answer B. Its bandwidth isn't fixed at 65 Hz and its symbol rate isn't 65 baud, the "65" in its name refers to something else entirely, and JT65 doesn't carry fast-scan TV.
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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