Advanced Qualification · A-006 Receivers · A-006-005-001
What part of a superheterodyne receiver determines the image rejection ratio of the receiver?
- A AGC loop
- B IF filter
- C RF amplifier pre-selector
- D Product detector
Correct answer: C — RF amplifier pre-selector. From the official ISED question bank, verified word for word.
Why
The RF amplifier pre-selector is the right answer because it acts as a tuned filter at the very front of the receiver, blocking unwanted signals that are spaced far away from your desired frequency before they can cause trouble. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.