Extra exam question E2E08
Subelement E2, OPERATING PROCEDURES· Group E2E
E2E08
Which of the following HF digital modes can be used to transfer binary files?
- A.PSK31
- B.PACTOR (correct answer)
- C.RTTY
- D.AMTOR
WhyPACTOR is the HF digital mode that can be used to transfer binary files. PACTOR is the HF digital mode built with the error-correction and framing needed to reliably transfer binary files, which is why it's used for services like winlink email attachments over HF, answer B. PSK31, RTTY, and AMTOR are all primarily designed for text traffic and aren't suited to transferring arbitrary binary data.
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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