Advanced Qualification · A-003 Measurements · A-003-005-010
Quel est le meilleur instrument pour vérifier la qualité du signal d'un émetteur CW ou BLU?
- AUn oscilloscope
- BUn moniteur de manipulation ("sidetone monitor")
- CUn traceur de signal et un amplificateur audio
- DUn mesureur d'intensité de champ
Correct answer: A — Un oscilloscope. Question tirée de la banque officielle d'ISDE.
Why
An oscilloscope displays the radio wave as a moving line on a screen, letting you see the exact shape of the signal to spot distortions or improper filtering that ruin signal quality. 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