Extra exam question E2D09
Subelement E2, OPERATING PROCEDURES· Group E2D
E2D09
What type of modulation is used by JT65?
- A.Multitone AFSK (correct answer)
- B.PSK
- C.RTTY
- D.QAM
WhyJT65 uses multitone audio frequency shift keying as its modulation. JT65 uses multitone audio frequency shift keying, encoding its data across a set of discrete audio tones fed into an SSB transmitter, answer A. It's not phase shift keying, conventional RTTY, or QAM, those are different modulation approaches used by other modes.
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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