Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-010
An apparatus with an oscillator and a class C amplifier would be:
- A a two-stage frequency-modulated transmitter
- B a two-stage regenerative receiver
- C a two-stage CW transmitter
- D a fixed-frequency single-sideband transmitter
Correct answer: C — a two-stage CW transmitter. From the official ISED question bank, verified word for word.
Why
An oscillator creates the radio signal and a Class C amplifier boosts it, but this amplifier distorts any changes in signal strength, making it useless for voice or complex data. 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.