Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-009
The purpose of a balanced modulator in an SSB transmitter is to:
- A suppress the carrier and pass the two sidebands
- B make sure that the carrier and both sidebands are 180 degrees out of phase
- C ensure that the percentage of modulation is kept constant
- D suppress the carrier and pass one sideband
Correct answer: A — suppress the carrier and pass the two sidebands. From the official ISED question bank, verified word for word.
Why
A balanced modulator takes the carrier signal and the voice information, mixes them, and cancels out the carrier wave while letting both the upper and lower sidebands pass through. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.