Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-007
What is the reason for neutralizing the final amplifier stage of a transmitter?
- A To eliminate parasitic oscillations
- B To limit the modulation index
- C To cut off the final amplifier during standby periods
- D To keep the carrier on frequency
Correct answer: A — To eliminate parasitic oscillations. From the official ISED question bank, verified word for word.
Why
Neutralizing the final amplifier stops unwanted high-frequency signals, called parasitic oscillations, from building up inside the transmitter. 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.