Basic Qualification · B-002 Operating and procedures · B-002-007-005
SOS CQD What does the code "QSB" mean in amateur radio?
- A I have no message
- B I am confirming contact
- C Your signal is fading
- D I am busy
Correct answer: C — Your signal is fading. From the official ISED question bank, verified word for word.
Why
The code QSB tells a station that their signal strength is changing, often getting weaker and stronger, which is described as fading. The full explanation — and one for every question — is in Pro.
Practise this section
How to operate: calling, phonetics, Q-signals, repeaters, nets, emergency traffic, and the courtesies that keep a band usable.