Advanced Qualification · A-003 Measurements · A-003-004-008
Which device relies on a stable low-frequency oscillator, with harmonic output, to facilitate the frequency calibration of receiver dial settings?
- A Frequency counter
- B Frequency-marker generator
- C Signal generator
- D Harmonic calibrator
Correct answer: B — Frequency-marker generator. From the official ISED question bank, verified word for word.
Why
A frequency-marker generator uses a stable low-frequency oscillator to create precise signals at regular intervals, such as every 50 or 100 kilohertz, which act as reference points to check and adjust a receiver's dial settings. 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.