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Question 208

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

  1. Reciprocal mixing
  2. Quieting
  3. DesensitizationCorrect answer
  4. Cross modulation interference

Explanation

Desensitization is the loss of receiver sensitivity that occurs when a strong signal near the receive frequency drives an early stage toward saturation or forces the AGC to cut gain. Reciprocal mixing raises the noise floor instead, and cross modulation transfers modulation from one signal onto another.

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Question 208: What is the term for the reduction in receiver sensitivity… · FCC Amateur Extra Class (Element 4) · Questena