SignalPrep
Advanced Qualification · A-003 Measurements · A-003-002-009

Quelle est la puissance en crête de modulation ("PEP") d'un émetteur si un oscilloscope indique qu'il y a 400 volts crête à crête qui circulent dans la charge fictive de 50 ohms reliée à la sortie de l'émetteur?

  1. A400 watts
  2. B200 watts
  3. C600 watts
  4. D1 000 watts

Correct answer: A — 400 watts. Question tirée de la banque officielle d'ISDE.

Why

To find the power, first turn the 400 volts peak-to-peak reading into a peak voltage by dividing by two, giving 200 volts. The full explanation — and one for every question — is in Pro.

Practise this section

Measurements is section A-003 of the Advanced exam: Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.

Drill A-003 — free, no account

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