Basic Qualification · B-001 Regulations and policies · B-001-019-002
Which of the following emission modes requires that an amateur radio station have means to prevent or indicate overmodulation?
- A CW
- B RTTY
- C FM
- D SSB
Correct answer: D — SSB. From the official ISED question bank, verified word for word.
Why
SSB, or single sideband voice, requires a way to stop or show overmodulation because pushing the signal too hard distorts the audio and splatters interference onto nearby frequencies. 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.