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An automatic tracking system for phase-noise measurement.

Chung Ming Yuen, Kim Fung Tsang

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |July 29, 2005
    PubMed
    Summary
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    A new, affordable automatic tracking system for phase noise measurement uses a phase-locked loop with a digital spectrum analyzer. This system accurately measures phase noise in voltage-controlled oscillators, proving its practical feasibility.

    Area of Science:

    • Electronics
    • Signal Processing
    • Measurement Science

    Background:

    • Phase noise measurement is critical for high-frequency electronic systems.
    • Traditional methods can be costly and complex.
    • A need exists for accessible and automated phase noise analysis.

    Discussion:

    • An automatic tracking system for phase noise measurement was successfully developed.
    • The system integrates a charge pump phase-locked loop (PLL) as an external reference for a digital spectrum analyzer.
    • This approach simplifies the measurement setup and enhances automation.

    Key Insights:

    • The implemented system offers a low-cost solution for phase noise analysis.
    • Successful measurement of a 2.5 GHz voltage-controlled oscillator (VCO) validated the system's tracking accuracy.

    Related Experiment Videos

  • The charge pump PLL effectively synchronizes with the signal under test.

    • Outlook:

    • This technology can be applied to various RF and microwave applications.
    • Further optimization could lead to enhanced measurement precision.
    • The system's cost-effectiveness promotes wider adoption in research and industry.