Advanced Qualification · A-006 Receivers · A-006-001-003
One of the greatest advantages of the double-conversion over the single-conversion receiver is that it:
- A produces a louder signal at the output
- B greater reduction of image interference for a given front end selectivity
- C is much more stable
- D is much more sensitive
Correct answer: B — greater reduction of image interference for a given front end selectivity. From the official ISED question bank, verified word for word.
Why
A double-conversion receiver mixes the incoming signal twice, using a first intermediate frequency that is high enough to make it easy for the front end to block unwanted mirror signals, known as image interference. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.