Advanced Qualification · A-002 Advanced components and circuits · A-002-009-011
What stage in a transmitter would change a 5.3-MHz input signal to 14.3 MHz?
- A A mixer
- B A linear translator
- C A frequency multiplier
- D A beat frequency oscillator
Correct answer: A — A mixer. From the official ISED question bank, verified word for word.
Why
A mixer is the correct choice because it combines two signals to create new frequencies that are the sum and difference of the originals. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.