Basic Qualification · B-002 Operating and procedures · B-002-006-005
What is the meaning of: "You are 5 9 plus 20 dB"?
- A Your signal strength has increased by a factor of 100
- B You are perfectly readable with a signal strength 20 decibels greater than S9
- C The bandwidth of your signal is 20 decibels above linearity
- D Repeat your transmission on a frequency 20 kHz higher
Correct answer: B — You are perfectly readable with a signal strength 20 decibels greater than S9. From the official ISED question bank, verified word for word.
Why
This report means your voice is perfectly clear and your signal is 20 decibels stronger than the highest standard reading, known as S9. 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.