Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-003
Dans un émetteur élémentaire à ondes entretenues (CW) comportant deux étages, le transistor du deuxième étage sert :
- Ade multiplicateur de fréquence
- Bde maître oscillateur
- Cd'oscillateur audio
- Dd'amplificateur de puissance
Correct answer: D — d'amplificateur de puissance. Question tirée de la banque officielle d'ISDE.
Why
In a simple two-stage continuous wave transmitter, the first stage creates the steady radio signal, while the second stage takes that weak signal and boosts its strength so it can travel far; this boosting role is called a power amplifier. 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.
Drill A-005 — free, no account