Basic Qualification · B-008 Interference and suppression · B-008-002-006
An amateur radio transmitter is being heard across the entire dial of a broadcast receiver. The receiver is most probably suffering from:
- A audio rectification
- B harmonics interference
- C poor image rejection
- D splatter from the transmitter
Correct answer: A — audio rectification. From the official ISED question bank, verified word for word.
Why
When a strong radio signal overloads a nearby receiver, the device's internal circuits can unintentionally act like a diode, converting the radio waves into an audible tone that sounds across the entire tuning dial. The full explanation — and one for every question — is in Pro.
Practise this section
When things interfere: harmonics, overload, RFI to and from your station, filters, ferrites and how to fix the neighbour's TV.