Advanced Qualification · A-006 Receivers · A-006-005-004
Comment réduire la désensibilisation d'un récepteur?
- AAugmenter la largeur de bande du récepteur
- BAugmenter le gain audio de l'émetteur
- CUtiliser un filtre à cavité
- DDiminuer le gain du circuit antibruit ("squelch") du récepteur
Correct answer: C — Utiliser un filtre à cavité. Question tirée de la banque officielle d'ISDE.
Why
A cavity filter acts like a very selective gate that blocks strong, unwanted signals from entering the receiver while letting the desired frequency pass through, which stops those strong signals from overwhelming the sensitive front end. 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