Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-006-009
In most modern FM transmitters, to produce a better sound, a compressor and a clipper are placed:
- A in the microphone circuit, before the audio amplifier
- B between the audio amplifier and the modulator
- C between the multiplier and the PA
- D between the modulator and the oscillator
Correct answer: B — between the audio amplifier and the modulator. From the official ISED question bank, verified word for word.
Why
In modern FM transmitters, a compressor and clipper sit between the audio amplifier and the modulator to shape the sound before it changes the radio frequency. 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.