Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-002-001
The output tuning controls on a transmitter power amplifier with an adjustable PI network:
- Aallow efficient transfer of power to the antenna
- Ballow switching to different antennas
- Creduce the possibility of cross-modulation in adjunct receivers
- Dare involved with frequency multiplication in the previous stage
Correct answer: A — allow efficient transfer of power to the antenna. From the official ISED question bank, verified word for word.
Why
The output tuning controls on a transmitter power amplifier with an adjustable PI network adjust the circuit to match the impedance of the amplifier to the antenna system. 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