Advanced Qualification · A-003 Measurements · A-003-004-007
La précision d'un fréquencemètre numérique est déterminée par :
- Ale genre d'affichage utilisé
- Ble nombre de chiffres affichés
- Cles caractéristiques de sa base de temps interne
- Dles dimensions de l'appareil
Correct answer: C — les caractéristiques de sa base de temps interne. Question tirée de la banque officielle d'ISDE.
Why
The accuracy of a frequency counter depends entirely on the stability and precision of its internal time-base generator, which acts as the master clock for all measurements. 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