Advanced Qualification · A-006 Receivers · A-006-003-008
The noise generated in a receiver of good design originates in the:
- A IF amplifier and detector
- B RF amplifier and mixer
- C detector and AF amplifier
- D BFO and detector
Correct answer: B — RF amplifier and mixer. From the official ISED question bank, verified word for word.
Why
Noise in a well-designed receiver starts at the very front end, specifically in the RF amplifier and mixer, because these are the first components to handle the faint signal from the antenna. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.