Basic Qualification · B-003 Station assembly, practice and safety · B-003-011-001
What does chirp mean?
- A A small change in the output frequency of a transmitter each time a dit or dah is sent
- B A high-pitched tone which is received along with every CW dit and dah
- C A slow change in transmitter frequency as the oscillator warms up
- D An overload in a receiver's audio circuit whenever CW is received
Correct answer: A — A small change in the output frequency of a transmitter each time a dit or dah is sent. From the official ISED question bank, verified word for word.
Why
Chirp happens when a transmitter's frequency shifts slightly every time you send a dot or dash, causing the signal to sound like a bird chirp on the other end. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.