Extra exam question E2E05
Subelement E2, OPERATING PROCEDURES· Group E2E
Which of these digital modes does not support keyboard-to-keyboard operation?
- A.WSPR (correct answer)
- B.RTTY
- C.PSK31
- D.MFSK16
WhyWSPR does not support keyboard-to-keyboard operation, since it only sends and decodes brief, automated standardized messages. WSPR is built purely as a low-power propagation-beacon mode, automatically sending and decoding brief standardized messages with no facility for a live, typed back-and-forth exchange, so it doesn't support keyboard-to-keyboard operation the way RTTY, PSK31, or MFSK16 do, answer A. Each of the other three modes was specifically designed to let two operators type messages to each other in real time.
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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