Advanced Qualification · A-003 Measurements · A-003-004-008
Quel dispositif utilise un oscillateur de basse fréquence stable, mais riche en harmoniques, pour faciliter l'étalonnage en fréquence du cadran d'accord d'un récepteur?
- AGénérateur de repères ("marker generator")
- BGénérateur de signaux
- CCalibrateur harmonique
- DFréquencemètre
Correct answer: A — Générateur de repères ("marker generator"). Question tirée de la banque officielle d'ISDE.
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 is section A-003 of the Advanced exam: Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.
Drill A-003 — free, no account