General exam question G2B04
Subelement G2, OPERATING PROCEDURES· Group G2B
When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?
- A.5 Hz to 50 Hz
- B.150 Hz to 500 Hz (correct answer)
- C.1 kHz to 3 kHz
- D.3 kHz to 6 kHz
WhyCW stations should use a minimum separation of about 150 Hz to 500 Hz to avoid interfering with adjacent frequencies. 150 Hz to 500 Hz of separation is the accepted minimum spacing for CW signals to avoid splattering into adjacent conversations, given how narrow a CW signal actually is, answer B. 5-50 Hz is tighter than practical given typical drift and keying bandwidth, and the wider ranges in C and D are more spacing than CW actually needs.
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.
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