Advanced Qualification · A-006 Receivers · A-006-004-004
In a superheterodyne receiver with automatic gain control (AGC), as the strength of the signal increases, the AGC:
- A introduces limiting
- B reduces the receiver gain
- C increases the receiver gain
- D distorts the signal
Correct answer: B — reduces the receiver gain. From the official ISED question bank, verified word for word.
Why
Automatic gain control acts like an automatic volume knob that turns down the receiver's internal amplification when a strong signal arrives. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.