Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-002-011
Harmonics produced in an early stage of a transmitter may be reduced in a later stage by:
- Agreater input to the final stage
- Btransistors instead of tubes
- Ctuned circuit coupling between stages
- Dlarger value coupling capacitors
Correct answer: C — tuned circuit coupling between stages. From the official ISED question bank, verified word for word.
Why
Tuned circuit coupling between stages uses resonant circuits that act like filters, allowing only the desired frequency to pass while blocking unwanted harmonics generated earlier. 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