Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-008
How should the microphone gain control be adjusted for voice operation on a single-sideband transmitter?
- AFor 100% frequency deviation on voice peaks
- BFor a dip in the drain or collector current
- CSuch that the maximum range on the ALC meter is never exceeded on voice peaks
- DFor full deflection of the ALC meter
Correct answer: C — Such that the maximum range on the ALC meter is never exceeded on voice peaks. From the official ISED question bank, verified word for word.
Why
Automatic Level Control, or ALC, is a circuit that prevents your transmitter from being overdriven, which causes distortion and can damage equipment. 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