Which of the following reduces the likelihood of receiver desensitization?

Deep Dive: E4D07

The correct answer is A: Insert attenuation before the first RF stage. Which of the following reduces the likelihood of receiver desensitization is to insert attenuation before the first RF stage. Attenuation before the first RF stage reduces strong signals before they can cause desensitization. For amateur radio operators, this is important for receiver operation. Understanding this helps when reducing desensitization.

Why Other Answers Are Wrong

Option B: Incorrect. Raising receiver's IF frequency doesn't reduce desensitization - attenuation before first RF stage does. IF frequency isn't the solution. Option C: Incorrect. Increasing receiver's front-end gain doesn't reduce desensitization - it makes it worse. Front-end gain increase is wrong. Option D: Incorrect. Switching from fast AGC to slow AGC doesn't reduce desensitization - attenuation before first RF stage does. AGC speed isn't the solution.

Exam Tip

Reduce desensitization = insert attenuation before first RF stage. Think 'R'educe 'D'esensitization = 'A'ttenuation 'B'efore 'R'F stage. Attenuation before the first RF stage reduces strong signals before they can cause desensitization. Not IF frequency, not front-end gain, not AGC speed - just attenuation before first RF stage.

Memory Aid

Reduce desensitization = insert attenuation before first RF stage. Think 'R'educe 'D'esensitization = 'A'ttenuation. Attenuation before the first RF stage reduces strong signals before they can cause desensitization. Important for receiver operation.

Real-World Example

Reducing the likelihood of receiver desensitization: Insert attenuation before the first RF stage. This reduces strong signals before they enter the receiver, preventing overload and desensitization. This is the solution - attenuation before first RF stage.

Source & Coverage

Question Pool: 2024-2028 Question Pool

Subelement: E4D

Reference: 2024-2028 Question Pool · E4 - Amateur Practices

Key Concepts

Reduce likelihood of receiver desensitization Insert attenuation Before first RF stage Desensitization reduction

Official Pool Source

Question text and answer key are synchronized with the current NCVEC Extra Class pool and mapped to the E4D topic.