General exam question G8C02
Subelement G8, SIGNALS AND EMISSIONS· Group G8C
Which digital mode is used as a low-power beacon for assessing HF propagation?
- A.WSPR (correct answer)
- B.MFSK16
- C.PSK31
- D.SSB-SC
WhyWSPR is the digital mode used as a low-power beacon for assessing HF propagation. WSPR (Weak Signal Propagation Reporter) transmits a low-power, tightly formatted beacon message specifically designed to be decoded well below the noise floor, making it a standard tool for probing what HF propagation paths are actually open at very low power, answer A. MFSK16 and PSK31 are general-purpose keyboard-to-keyboard digital modes, and SSB-SC (suppressed-carrier SSB) is an analog voice mode, none of them built around this low-power beacon-and-propagation-reporting role.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
Related questions
- G8C03What part of a packet radio frame contains the routing and handling information?
- G8C04Which of the following describes Baudot code?
- G8C05In an ARQ mode, what is meant by a NAK response to a transmitted packet?
- G8C06What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?
- G8C07Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?