Advanced Qualification · A-006 Receivers · A-006-005-001
Quelle partie d'un récepteur superhétérodyne détermine le taux de rejet de la fréquence image?
- ALe présélecteur de l'amplificateur RF
- BLe détecteur de produit
- CLa boucle de commande automatique de gain ("AGC")
- DLe filtre FI
Correct answer: A — Le présélecteur de l'amplificateur RF. Question tirée de la banque officielle d'ISDE.
Why
The RF amplifier pre-selector is the right answer because it acts as a tuned filter at the very front of the receiver, blocking unwanted signals that are spaced far away from your desired frequency before they can cause trouble. 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