Basic Qualification · B-008 Interference and suppression · B-008-004-004
What term describes unwanted radio energy transmitted just outside the necessary bandwidth?
- A Spurious emissions
- B "Out-of-band" emissions
- C Harmonic emissions
- D Parasitic emissions
Correct answer: B — "Out-of-band" emissions. From the official ISED question bank, verified word for word.
Why
"Out-of-band" emissions describe unwanted radio energy that leaks just outside the specific frequency range your signal is allowed to use. 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.