Double Sideband Modulation and Demodulation (DSBSC)

In this lab, students will create a DSBSC signal and gain insight into the meaning of “Suppressed Carrier.” They will also use product demodulation to recover the message and examine the effect of phase and frequency errors on the recovery process.
by Emona Tims

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This is lab 6 of 22 in the course, Communications Principles.


After completing this lab, students will be able to:
  1. Generate a real DSBSC signal.
  2. Examine a real DSBSC signal with scope and compare it to its original message.
  3. Use multiple message sources in their DSBSC examination.
  4. Describe the term “depth of modulation.”
  5. Describe the effects and meaning of over and under modulation of the carrier.
  6. Compare original and demodulated signals.
  7. Describe distortion in the recovered signal.
  8. Identify the effect of phase and frequency errors on the demodulation process.
  9. Explain the term “product modulation.”


  • Basic proficiency using ELVIS III Instruments
  • Basic Circuits Knowledge


Engineering laboratory solution for project-based learning that combines instrumentation and embedded design with a web-driven experience, delivering a greater understanding of engineering fundamentals and system design.

Emona Communications Board for NI ELVIS III

Application board for the NI ELVIS III developed to teach introductory digital and analog communications topics using a completely hands-on approach.


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