Advanced Qualification · A-006 Receivers · A-006-003-002
Quel est le rôle principal de l'amplificateur FI dans un récepteur?
- AAméliorer la sélectivité et le gain
- BÉliminer la distorsion de transmodulation
- CAméliorer la réponse dynamique
- DAméliorer le facteur de bruit ("noise figure")
Correct answer: A — Améliorer la sélectivité et le gain. Question tirée de la banque officielle d'ISDE.
Why
The first intermediate frequency, or IF, amplifier is designed to boost the signal strength and sharpen the receiver's ability to separate the desired station from nearby frequencies. 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