SignalPrep
Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-009

Les oscillations parasites ont généralement tendance à prendre naissance dans :

  1. Ales étages de sortie audio à gain élevé
  2. Bles redresseurs à haute tension
  3. Cles étages mélangeurs
  4. Dles amplificateurs de puissance RF

Correct answer: D — les amplificateurs de puissance RF. Question tirée de la banque officielle d'ISDE.

Why

Parasitic oscillations are unwanted radio signals that sneak into a circuit, and they happen most often in RF power output stages because these parts handle the strongest signals and highest voltages. The full explanation — and one for every question — is in Pro.

Practise this section

Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.

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