Extra exam question E8C05
Subelement E8, SIGNALS AND EMISSIONS· Group E8C
E8C05
What is the approximate bandwidth of a 13-WPM International Morse Code transmission?
- A.13 Hz
- B.26 Hz
- C.52 Hz (correct answer)
- D.104 Hz
WhyA 13-WPM International Morse Code transmission has an approximate bandwidth of 52 Hz. A widely used rule of thumb approximates a CW signal's bandwidth as about 4 times its keying speed in words per minute, so 13 WPM times 4 works out to approximately 52 Hz, answer C. The other figures don't match this standard approximation applied to a 13 WPM sending speed.
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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