Basic Qualification · B-006 Feedlines and antenna systems · B-006-006-002
What does an antenna tuner do?
- A It helps a receiver automatically tune in stations that are far away
- B It switches an antenna system to a transmitter when sending, and to a receiver when listening
- C It switches multiple transceivers to a common transmission line and antenna
- D It matches a transceiver to a mismatched antenna system
Correct answer: D — It matches a transceiver to a mismatched antenna system. From the official ISED question bank, verified word for word.
Why
An antenna tuner adjusts the electrical connection between your radio and the antenna so that power flows efficiently, even when the antenna is not perfectly sized for the frequency you are using. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.