Advanced Qualification · A-006 Receivers · A-006-001-010
A double conversion receiver designed for SSB reception has a beat frequency oscillator and:
- Atwo IF stages and two local oscillators
- Bone IF stage and one local oscillator
- Ctwo IF stages and three local oscillators
- Dtwo 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 is section A-006 of the Advanced exam: Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.
Drill A-006 — free, no account