Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-009-001
What term describes a wide-band communications system in which the RF carrier varies according to some predetermined sequence?
- AAMTOR
- BTime domain frequency modulation
- CSpread spectrum communication
- DAmplitude-companded single sideband
Correct answer: C — Spread spectrum communication. From the official ISED question bank, verified word for word.
Why
Spread spectrum communication is the right term because it describes a system where the radio frequency carrier hops or spreads across a wide band following a specific, predetermined sequence known to both sender and receiver. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account