Advanced Qualification · A-006 Receivers · A-006-004-010
Quelles deux variables caractérisent l'essentiel de l'action de la Commande Automatique de Gain ("AGC")?
- ANiveau de suppression du bruit et pente ("Blanking level and slope")
- BPente et largeur de bande ("Slope and bandwidth")
- CNiveau d'écrêtage et délai de fonctionnement ("Clipping level and hang time")
- DSeuil et délai de fonctionnement ("Threshold and decay time")
Correct answer: D — Seuil et délai de fonctionnement ("Threshold and decay time"). Question tirée de la banque officielle d'ISDE.
Why
An automatic gain control loop relies on two main settings: the threshold, which is the signal level that triggers the gain reduction, and the decay time, which is how long the system waits before returning the gain to normal after the strong signal fades. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers is section A-006 of the Advanced exam: Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.
Drill A-006 — free, no account