Advanced Qualification · A-003 Measurements · A-003-004-001
What does a frequency counter do?
- A It generates broad-band white noise calibration
- B It produces a reference frequency
- C It makes frequency measurements
- D It measures frequency deviation
Correct answer: C — It makes frequency measurements. From the official ISED question bank, verified word for word.
Why
A frequency counter is an electronic instrument designed specifically to count how many times a radio signal repeats each second, which is the definition of frequency. 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.