Advanced Qualification · A-002 Advanced components and circuits · A-002-011-003
For single-sideband phone emissions, what would be the bandwidth of a good crystal lattice filter?
- A 15 kHz
- B 500 Hz
- C 6 kHz
- D 2.4 kHz
Correct answer: D — 2.4 kHz. From the official ISED question bank, verified word for word.
Why
A good crystal lattice filter for single-sideband phone passes just enough audio to make speech clear while blocking unwanted signals, which requires a width of about 2.4 kHz. The full explanation — and one for every question — is in Pro.
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Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.