Amateur Extra › E8 Signals and Emissions › E8D02
E8D02
What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?
Pick an answer to check it.
Answer: B. Direct sequence
Direct sequence spread spectrum uses a fast pseudorandom bit stream to shift the carrier phase. This spreads the signal over a wide bandwidth.
Tip: Direct sequence = fast bits flip the phase.