Basic Qualification · B-008 Interference and suppression · B-008-005-010
Your 2-metre station suffers receiver overload from several land mobile service transmitters on adjacent bands. What type of filter could help?
- A Low-pass
- B High-pass
- C Notch
- D Band-pass
Correct answer: D — Band-pass. From the official ISED question bank, verified word for word.
Why
A Band-pass filter lets only the specific range of frequencies your station uses pass through while blocking signals that are too low or too high. 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.