Radio Amateur Quiz Canadian License

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Question A-006-005-002

What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

Correct Answer

Desensitization

Explanation

Desensitization (or blocking) occurs when a strong off-channel signal reduces the gain of the receiver's front-end or IF stages (often by driving them into non-linearity or activating AGC), making it harder to receive weak desired signals.

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