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سؤال 440

How can an oscillator’s microphonic responses be reduced?

  1. Use NP0 capacitors
  2. Reduce noise on the oscillator’s power supply
  3. Increase the gain
  4. Mechanically isolate the oscillator circuitry from its enclosureپاسخ درست

توضیح

Because microphonics originate in mechanical vibration reaching the frequency-determining parts, the remedy is mechanical: isolate or shock-mount the oscillator assembly from the enclosure and build it rigidly so vibration cannot move the components.

ادامهٔ این آزمون

شروع تمرین
سؤال 440: How can an oscillator’s microphonic responses be reduced? · FCC Amateur Extra Class (Element 4) · Questena