Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-010
Dans un récepteur à modulation de fréquence, quel étage comprend un "squelch" (silencieux)?
- ALe détecteur de produit
- BL'amplificateur audiofréquence
- CLe limiteur
- DL'amplificateur de fréquence intermédiaire
Correct answer: B — L'amplificateur audiofréquence. Question tirée de la banque officielle d'ISDE.
Why
The squelch circuit sits in the AF amplifier stage because this is where the audio signal is boosted to drive your speaker. The full explanation — and one for every question — is in Pro.
Practise this section
Station assembly, practice and safety is section B-003 of the Basic exam: Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.
Drill B-003 — free, no account