Frequency Stability & Precision Timing Toolset™Perform allan deviation, power oscillation, phase noise measurement, and more.
EZL’s Time Domain Frequency Stability and Precision Timing Toolset™ includes the most widely used statistical analysis tools for frequency stability and precise time and time interval (PTTI) data.
The time domain stability of a frequency source is measured as a statistic of its phase or frequency fluctuations, as a function of time. Because the noise types commonly associated with time and frequency sources are divergent, common metrics – such as the standard variance, which assumes a constant mean – cannot be applied. Therefore, other variances have been developed for the time and frequency metrology, which provide far better characterization.
The Allan Variance (typically presented as its square-root – the Allan Deviation) is the most common time domain measure of frequency stability.
The National Institute of Standards and Technology (NIST) provides a great report of time domain frequency stability analysis in their Handbook of Frequency Stability Analysis.
- Allan Deviation1 (ADEV) – Allan Variance (AVAR)
- Modified (MDEV)
- Hadamard (HDEV)
- Time (TDEV)
- Power Oscillation
- Phase noise measurement
- Built-in Noise generator
- Generate statistically accurate noise data sets of unlimited size
- Model your noise sets with one or more weighted noise types, including
- Random Walk Frequency Modulated (FM)
- Flicker FM
- White FM
- Flicker Phase Modulated (PM)
- White PM
1 Visit the wikipedia page on Allan Variances for some great details on this very useful statistic!