Basic Qualification · B-008 Interference and suppression · B-008-002-005
If an amateur radio transmission is heard in a device that contains no RF components, what type of interference is this?
- AIntermodulation
- BAudio rectification
- CFront-end overload
- DSplatter
Correct answer: B — Audio rectification. From the official ISED question bank, verified word for word.
Why
Audio rectification happens when a strong radio signal enters a device with no radio parts, like a speaker or amplifier, and gets converted into an audible buzz or voice. The full explanation — and one for every question — is in Pro.
Practise this section
Interference and suppression is section B-008 of the Basic exam: When things interfere: harmonics, overload, RFI to and from your station, filters, ferrites and how to fix the neighbour's TV.
Drill B-008 — free, no account