Basic Qualification · B-008 Interference and suppression · B-008-001-001
What is the cause of receiver overload?
- AOvermodulation of a transmitter
- BVery strong signal from a transmitter
- CFrequency instability of a transmitter
- DParasitic oscillations in a transmitter
Correct answer: B — Very strong signal from a transmitter. From the official ISED question bank, verified word for word.
Why
Receiver overload happens when a nearby transmitter sends a signal so powerful that it overwhelms the sensitive circuits inside your radio, much like shouting too close to someone's ear makes it impossible to hear a whisper. 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