Eye Measurements, Jitter, and Timing in MATLAB

Measure eye diagram metrics, jitter, and timing metrics from waveform data in MATLAB^®

Create eye diagram from waveform data and measure performance metrics from generated diagram in MATLAB. You can also measure total, random, and deterministic jitter from waveform data. Also measure waveform quality metrics such as rise time, fall time, and duty cycle.

To measure the metrics in Simulink^®, see Eye Measurement, Jitter, and Timing in Simulink.

Functions

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Eye Measurements

`eyeHeight`	Measure vertical eye opening (Since R2024a)
`eyeWidth`	Measure horizontal eye opening (Since R2024a)
`eyeArea`	Measure eye area (Since R2024a)
`eyeAmplitude`	Measure eye amplitude (Since R2024a)
`eyeLevels`	Measure symbol level statistics from eye diagram (Since R2024a)
`eyeCenter`	Measure eye center point (Since R2024a)
`eyeCrossing`	Measure eye crossing points (Since R2024a)
`risetime`	Measure rise time from eye diagram (Since R2024a)
`falltime`	Measure fall time from eye diagram (Since R2024a)
`vec`	Measure vertical eye closure (Since R2024a)
`com`	Measure channel operating margin (Since R2024a)
`eyeLinearity`	Measure eye linearity (Since R2024a)
`upperContour`	Measure upper contour of eye diagram (Since R2024a)
`lowerContour`	Measure lower contour of eye diagram (Since R2024a)
`closedContour`	Measure closed contour of eye diagram (Since R2024a)
`margin`	Calculate margins of eye contour from mask (Since R2024a)
`plot`	Plot eye diagram, eye contour, or eye mask object (Since R2024a)
`bathtub`	Plot bathtub curves (Since R2024a)
`slice`	Extract slice from eye diagram (Since R2024a)

Jitter

`jitter`	Measure jitter metrics from waveforms (Since R2024b)
`jitterTotal`	Measure total jitter metric from waveform (Since R2024b)
`jitterRandom`	Measure random jitter from waveform (Since R2024b)
`jitterDeterministic`	Measure deterministic jitter from waveform (Since R2024b)
`jitterDataDependent`	Measure data-dependent jitter from waveform (Since R2024b)
`jitterDutyCycle`	Measure jitter correlated with duty cycle distortion (Since R2024b)
`jitterIntersymbol`	Measure jitter correlated with intersymbol interference (Since R2024b)
`jitterPeriodic`	Measure periodic jitter from waveform (Since R2024b)
`jitterSinusoidal`	Measure sinusoidal jitter from waveform (Since R2024b)
`timingError`	Measure timing error from waveform (Since R2024b)
`timeIntervalError`	Measure time interval error (Since R2024b)

Timing

`timeDomainSignal2RiseTime`	Measure rise time of time domain signal
`timeDomainSignal2FallTime`	Measure fall time of time domain signal
`timeDomainSignal2DutyCycle`	Measure duty cycle of time-domain signal

Objects

`eyeDiagramSI`	Create eye diagram from time-domain data (Since R2024a)
`eyeContour`	Contour of eye opening from eye diagram (Since R2024a)
`eyeMask`	Shape and size mask of eye opening (Since R2024a)

Featured Examples

Choose Extrapolation Method Based on Application

Choose the right extrapolation method based on your design. It also shows how to use extrapolation method to predict the values eye metrics at symbol error rates beyond those captured in an eye diagram. You can see the strengths and weaknesses of each extrapolation or interpolation method.

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