Advanced Qualification · A-006 Receivers · A-006-001-004
Dans un récepteur, le filtre à cristal est situé dans :
- Al'étage de sortie audio
- Ble détecteur
- Cles circuits FI
- Dl'oscillateur local
Correct answer: C — les circuits FI. Question tirée de la banque officielle d'ISDE.
Why
A crystal filter belongs in the IF circuits because that is where the radio converts the incoming signal to a fixed, lower frequency to make it easier to separate the desired station from others. 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