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DSB-SC & SSB MCQs

Practice DSB-SC & SSB MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Communication SystemsDSB-SC & SSB

In a DSB-SC system, which component is suppressed?

  • ABoth sidebands
  • BCarrier
  • CMessage signal
  • DReceiver local oscillator
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Correct Answer: B. Carrier
Explanation: Double-sideband suppressed-carrier modulation transmits both sidebands while suppressing the carrier component.
Reference: Standard communication systems: dsb-sc & ssb
Question 4
Communication SystemsDSB-SC & SSB

One important advantage of SSB over conventional AM is?

  • ATwice the bandwidth requirement
  • BReduced bandwidth and improved power efficiency
  • CNeed for a much larger carrier
  • DComplete immunity to all noise
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Correct Answer: B. Reduced bandwidth and improved power efficiency
Explanation: SSB transmits one sideband and usually suppresses the carrier, saving both bandwidth and transmitted power.
Reference: Standard communication systems: dsb-sc & ssb
Question 6
Communication SystemsDSB-SC & SSB

The phase-shift method of SSB generation ideally requires two versions of the message signal differing in phase by?

  • A45 degrees
  • B90 degrees
  • C180 degrees
  • D360 degrees
Report an error
Correct Answer: B. 90 degrees
Explanation: The phase-shift method uses quadrature message components and quadrature carrier components so one sideband cancels while the other adds.
Reference: Standard communication systems: phase-shift SSB generation