Receivers

What is the definition of the term “receiver desensitizing”?

Answer

A reduction in receiver sensitivity because of a strong signal on a nearby frequency.

Receiver desensitizing is a loss of sensitivity caused by a strong signal on a nearby frequency overloading the front end.

Source: FCC Element 3 question pool, 3F

Not the answer

  • A burst of noise when the squelch is set too high.
  • A reduction in receiver sensitivity when the AF gain control is turned down.
  • A burst of noise when the squelch is set too low.

Practice this

The FCC Element 3 (General Radiotelephone) exam is 100 questions and takes 75 correct — 75% — to pass. Element 1, the other half of the licence, is 24 questions and takes 18 correct. The app’s page carries a free ten-question test drawn from the same bank, marked as you go.

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