Basic Qualification · B-007 Radio wave propagation · B-007-006-005
What is one way to determine if the maximum usable frequency (MUF) is high enough to support 28 MHz propagation between your station and western Europe?
- A Listen for 20-metre beacon stations
- B Listen for 31-metre broadcast stations
- C Listen for WWVH time signals on 15 MHz
- D Listen for 10-metre beacon stations
Correct answer: D — Listen for 10-metre beacon stations. From the official ISED question bank, verified word for word.
Why
Beacon stations are simple transmitters that send a steady signal so you can check if a band is open. The full explanation — and one for every question — is in Pro.
Practise this section
How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.