Extra exam question E2D03
Subelement E2, OPERATING PROCEDURES· Group E2D
Which of the following digital modes is designed for EME communications?
- A.MSK144
- B.PACTOR III
- C.WSPR
- D.Q65 (correct answer)
WhyQ65 is the digital mode designed for EME communications. Q65 is the WSJT-X mode specifically designed for the very weak, multipath-distorted signals typical of Earth-Moon-Earth (EME) communication, using wide tone spacing and long averaging to pull signals out of the noise, answer D. MSK144 is built for meteor scatter instead, PACTOR III is an HF data mode unrelated to EME, and WSPR is meant for propagation reporting rather than two-way EME contacts.
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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