Basic Qualification · B-008 Interference and suppression · B-008-001-008
Two or more strong signals mix in your receiver to produce interference on a desired frequency. What is this called?
- A Intermodulation interference
- B Harmonic interference
- C Capture effect
- D Front-end desensitization
Correct answer: A — Intermodulation interference. From the official ISED question bank, verified word for word.
Why
When two or more strong signals enter your receiver and mix together, they create new, unwanted frequencies that land right on top of the signal you want to hear. 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.