Advanced Qualification · A-006 Receivers · A-006-004-007
The overall output of an AM/CW/SSB receiver can be adjusted by means of manual controls on the receiver or by use of a circuit known as:
- A automatic load control
- B automatic gain control
- C automatic frequency control
- D inverse gain control
Correct answer: B — automatic gain control. From the official ISED question bank, verified word for word.
Why
Automatic gain control keeps the sound volume steady even when the incoming signal strength changes wildly, acting like an automatic volume knob that adjusts itself so you do not have to. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.