Basic Qualification · B-003 Station assembly, practice and safety · B-003-001-005
What is the purpose of the antenna switch in an HF station?
- A To adjust the antenna operating frequency
- B To adjust the impedance of the antenna system
- C To select the orientation of the antenna
- D To select the desired antenna or dummy load
Correct answer: D — To select the desired antenna or dummy load. From the official ISED question bank, verified word for word.
Why
An antenna switch acts like a traffic director for your radio, letting you choose which antenna receives the signal or connecting the transmitter to a dummy load when you need to test without radiating. 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.