Advanced Qualification · A-006 Receivers · A-006-005-003
What causes receiver desensitization?
- A Strong near frequency signals
- B Squelch gain adjusted too high
- C Squelch gain adjusted too low
- D Audio gain adjusted too low
Correct answer: A — Strong near frequency signals. From the official ISED question bank, verified word for word.
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: superheterodyne design, selectivity, sensitivity, images, AGC and noise.