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Novel frequency stability measurement method with whole sample time range.

Bayi Qu1, Fanxin Xue1, Dongsong Yu1

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This study presents a novel method for measuring frequency stability across a wide range of sample times. The technique achieves high precision for transient, short-term, and long-term stability measurements, offering improved phase noise analysis.

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Area of Science:

  • Metrology
  • Physics
  • Electrical Engineering

Background:

  • Accurate frequency stability measurements are crucial for advanced timing systems.
  • Existing methods may have limitations in covering a wide range of sample times.
  • Phase noise analysis often relies on frequency stability data.

Purpose of the Study:

  • To introduce a new method for measuring frequency stability over a broad spectrum of sample times.
  • To demonstrate the method's capability in achieving high precision across different stability regimes.
  • To enable more accurate phase noise index correlation and detection of subtle phenomena.

Main Methods:

  • Development of a measurement technique applicable to a nearly complete range of sample times.
  • Utilizing specific sample times (100 ns, 1 s, 1 day) to assess different stability types.
  • Correlating frequency stability measurements with phase noise characteristics.

Main Results:

  • Achieved precision of 10-5/100 ns for transient stability.
  • Attained short-term stability of 10-12/s with a 1 s sample time.
  • Reached long-term stability of 10-16/day with a 1 day sample time.

Conclusions:

  • The presented method offers a comprehensive approach to frequency stability measurement.
  • High precision is demonstrated across transient, short-term, and long-term measurements.
  • The method enhances the ability to detect phenomena not easily visible in standard phase noise curves.