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A method for using a time interval counter to measure frequency stability
1Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA.
Summary
This study introduces a novel interval timer method for frequency stability measurements, overcoming dead-time issues for precise, low-cost results. The technique offers high precision but is susceptible to data loss.
Area of Science:
- Metrology
- Signal Processing
- Instrumentation
Background:
- Traditional frequency stability measurements often face challenges with timer dead-time, impacting accuracy.
- Existing methods may lack precision or be prohibitively expensive.
Purpose of the Study:
- To present a new method for frequency stability measurement using an interval timer.
- To address and overcome the dead-time problem in such measurements.
- To detail the associated algorithms and their advantages.
Main Methods:
- An interval timer replaces the conventional event timer in a single-mixer system.
- A reference pulse train and an ambiguity resolution algorithm are employed.
- The noise floor test and an unfolding algorithm are described.
Main Results:
- The proposed technique effectively avoids the dead-time problem.
- High precision in frequency stability measurements is achieved.
- The system demonstrates convenient interfacing and low cost.
Conclusions:
- The interval timer method offers a precise, cost-effective solution for frequency stability measurements.
- The technique's main limitation is its vulnerability to missing data.
- Further development may focus on mitigating data loss issues.
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