Advanced Qualification · A-006 Receivers · A-006-001-010
A double conversion receiver designed for SSB reception has a beat frequency oscillator and:
- A two IF stages and two local oscillators
- B one IF stage and one local oscillator
- C two IF stages and three local oscillators
- D two IF stages and one local oscillator
Correct answer: A — two IF stages and two local oscillators. From the official ISED question bank, verified word for word.
Why
A double conversion receiver uses two separate frequency conversion steps to improve clarity, which requires two intermediate frequency stages and two local oscillators to shift the signal twice before it reaches the beat frequency oscillator for SSB decoding. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.