Advanced Qualification · A-006 Receivers · A-006-004-006
The low-level output of a detector is:
- A applied to the AF amplifier
- B grounded via the chassis
- C fed directly to the speaker
- D applied to the RF amplifier
Correct answer: A — applied to the AF amplifier. From the official ISED question bank, verified word for word.
Why
The detector extracts the audio information from the radio signal, but this low-level output is too weak to move a speaker on its own. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.