Basic Qualification · B-003 Station assembly, practice and safety · B-003-015-011
With a digital communication mode based on a computer sound card, what is the result of feeding excessive audio into the transmitter?
- A Power amplifier overheating
- B Splatter or out-of-channel emissions
- C Higher signal-to-noise ratio
- D Lower error rate
Correct answer: B — Splatter or out-of-channel emissions. From the official ISED question bank, verified word for word.
Why
Feeding too much audio into a transmitter with a sound card causes the signal to stretch beyond its intended frequency range, creating unwanted noise on nearby channels known as splatter or out-of-channel emissions. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.