Advanced Qualification · A-006 Receivers · A-006-005-002
What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?
- A Desensitization
- B Cross-modulation interference
- C Squelch gain rollback
- D Quieting
Correct answer: A — Desensitization. From the official ISED question bank, verified word for word.
Why
Desensitization happens when a powerful nearby signal overloads your receiver's front end, effectively blinding it to weaker signals you actually want to hear. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.