Advanced Qualification · A-006 Receivers · A-006-005-003
Qu'est-ce qui provoque la désensibilisation d'un récepteur?
- ALe gain du circuit antibruit ("squelch") ajusté trop bas
- BLe gain audio ajusté trop bas
- CDes signaux très forts sur une fréquence proche
- DLe gain du circuit antibruit ("squelch") ajusté trop haut
Correct answer: C — Des signaux très forts sur une fréquence proche. Question tirée de la banque officielle d'ISDE.
Why
Strong near frequency signals cause receiver desensitization because a powerful transmission close to your desired frequency overloads the receiver's front end, temporarily reducing its ability to hear weaker signals. 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