Advanced Qualification · A-006 Receivers · A-006-002-010
Which two stages in a superheterodyne receiver have input tuned circuits tuned to the same frequency?
- A IF and local oscillator
- B RF and IF
- C RF and local oscillator
- D RF and first mixer
Correct answer: D — RF and first mixer. From the official ISED question bank, verified word for word.
Why
In a superheterodyne receiver, the radio frequency stage and the first mixer stage both use tuned circuits set to the incoming signal frequency before any frequency conversion happens. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.