Advanced Qualification · A-003 Measurements · A-003-005-005
An oscilloscope cannot be used to:
- A measure frequency
- B measure DC voltage
- C determine the amplitude of complex voltage wave forms
- D determine FM carrier deviation directly
Correct answer: D — determine FM carrier deviation directly. From the official ISED question bank, verified word for word.
Why
An oscilloscope shows voltage changing over time, but it cannot directly read how much an FM signal's frequency swings around its centre point. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.