Basic Qualification · B-003 Station assembly, practice and safety · B-003-014-009
What type of interference is a noise blanker circuit most effective in eliminating?
- AShort-duration impulse-type noise
- BContinuous wideband background noise
- CInterfering signals on the same frequency
- DDistortion from overdeviated signals
Correct answer: A — Short-duration impulse-type noise. From the official ISED question bank, verified word for word.
Why
A noise blanker works by spotting sudden, sharp bursts of static, like those from a car ignition or a power line spark, and briefly muting the receiver just long enough to skip over them. The full explanation — and one for every question — is in Pro.
Practise this section
Station assembly, practice and safety is section B-003 of the Basic exam: Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.
Drill B-003 — free, no account