Basic Qualification · B-002 Operating and procedures · B-002-003-009
Which sideband is commonly used for 20-metre voice operation?
- A Double
- B Upper
- C Lower
- D Independent
Correct answer: B — Upper. From the official ISED question bank, verified word for word.
Why
On the 20-metre band, amateur radio operators almost always use the Upper sideband for voice communication. 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.