Advanced Qualification · A-006 Receivers · A-006-001-007
Which stage of a receiver has its input and output circuits tuned to the received frequency?
- A The local oscillator
- B The audio frequency amplifier
- C The detector
- D The RF amplifier
Correct answer: D — The RF amplifier. From the official ISED question bank, verified word for word.
Why
The RF amplifier is the correct choice because it is the first active stage in a receiver designed to boost weak incoming signals, and its circuits are specifically tuned to the exact frequency you are trying to hear. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.