Advanced Qualification · A-006 Receivers · A-006-003-004
What is the primary purpose of an RF amplifier in a receiver?
- A To vary the receiver image rejection by using the AGC
- B To develop the AGC voltage
- C To provide most of the receiver gain
- D To improve the receiver noise figure
Correct answer: D — To improve the receiver noise figure. From the official ISED question bank, verified word for word.
Why
An RF amplifier sits at the very front of a receiver to boost weak signals before they reach later stages, which prevents those later parts from adding too much static hiss. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.