Basic Qualification · B-002 Operating and procedures · B-002-003-006
Why should you be careful in choosing a simplex frequency when operating VHF or UHF?
- A Implanted medical devices share the same spectrum
- B Some frequencies are designated for narrow band FM and others for wideband FM
- C To avoid inadvertently choosing a frequency that is the input to a local repeater
- D Some frequencies cannot accommodate simplex operation
Correct answer: C — To avoid inadvertently choosing a frequency that is the input to a local repeater. From the official ISED question bank, verified word for word.
Why
Many repeaters listen on one frequency and talk back on another, so if you pick the listening frequency for your own simple direct talk, your signal will trigger the repeater and confuse everyone trying to use it. The full explanation — and one for every question — is in Pro.
Practise this section
How to operate: calling, phonetics, Q-signals, repeaters, nets, emergency traffic, and the courtesies that keep a band usable.