Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-005
Why does the power amplifier of the SSB transmitter need to be linear?
- AHum and noise are reduced
- BPower demand on the power supply is regulated
- CPower output variations due to voice peaks are reduced
- DVoice is unintelligible when amplified by a non-linear amplifier
Correct answer: D — Voice is unintelligible when amplified by a non-linear amplifier. From the official ISED question bank, verified word for word.
Why
Single Sideband (SSB) signals carry voice information in their shape, so if the power amplifier distorts that shape, the original speech becomes garbled and impossible to understand. 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