Extra exam question E4D07
Subelement E4, AMATEUR PRACTICES· Group E4D
Which of the following reduces the likelihood of receiver desensitization?
- A.Insert attenuation before the first RF stage (correct answer)
- B.Raise the receiver’s IF frequency
- C.Increase the receiver’s front-end gain
- D.Switch from fast AGC to slow AGC
WhyInserting attenuation before the first RF stage reduces the likelihood of receiver desensitization. Inserting attenuation ahead of the first RF stage reduces the level of a strong nearby signal before it can overload that stage, directly addressing the cause of desensitization, answer A. Raising the IF frequency, increasing front-end gain, or switching AGC speed don't address the fundamental overload problem the way front-end attenuation does, and increasing gain would actually make overload more likely, not less.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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