Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-009
Parasitic oscillations would tend to occur mostly in:
- A high voltage rectifiers
- B mixer stages
- C RF power output stages
- D high gain audio output stages
Correct answer: C — RF power output stages. From the official ISED question bank, verified word for word.
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: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.