Extra exam question E2E03
Subelement E2, OPERATING PROCEDURES· Group E2E
E2E03
To what does the "4" in FT4 refer?
- A.Multiples of 4 bits of user information
- B.Four-tone continuous-phase frequency shift keying (correct answer)
- C.Four transmit/receive cycles per minute
- D.All these choices are correct
WhyThe "4" in FT4 refers to its four-tone, continuous-phase frequency shift keying modulation. The "4" in FT4 refers to its use of four-tone, continuous-phase frequency shift keying as its modulation scheme, distinguishing it from FT8's own multitone scheme, answer B. It doesn't refer to a multiple-of-4-bits data unit or to four transmit/receive cycles per minute, and since only the tone-count description is actually accurate, "all these choices" overstates it.
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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