Basic Qualification · B-003 Station assembly, practice and safety · B-003-015-008
When using a digital mode based on a computer sound card, how can you verify that the transmit audio level is NOT excessive?
- AEnsure your transmitter's audio compression is set to maximum
- BVerify that the automatic level control (ALC) is actively limiting every transmission
- CAsk a local station to confirm your signal can be successfully decoded
- DAsk a local station to confirm your signal is free of splatter
Correct answer: D — Ask a local station to confirm your signal is free of splatter. From the official ISED question bank, verified word for word.
Why
When you push your audio levels too high, your signal spreads into neighbouring frequencies, creating a harsh noise called splatter that jams other users. 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