Basic Qualification · B-001 Regulations and policies · B-001-018-002
An unmodulated carrier may be transmitted only:
- A for holding a frequency until a net begins
- B for brief tests on frequencies below 30 MHz
- C if the final RF amplifier output is kept under 5 watts
- D for CW communication
Correct answer: B — for brief tests on frequencies below 30 MHz. From the official ISED question bank, verified word for word.
Why
An unmodulated carrier, which is a steady radio wave with no voice or data riding on it, is allowed only for short testing purposes on frequencies below 30 MHz. The full explanation — and one for every question — is in Pro.
Practise this section
The rules: who may operate, what the certificate allows, station identification, third-party traffic, what you may and may not transmit, and how ISED regulates the amateur service.