Editing Eye pattern (section)

==Measurements==
There are many measurements that can be obtained from an eye diagram:<ref>{{cite web
 | url = http://www.mathworks.com/access/helpdesk/help/toolbox/comm/index.html?/access/helpdesk/help/toolbox/comm/ref/commscope.eyediagram.html
 | title = Matlab's help file description of how to use the Eye Diagram Functions in the Communications Toolbox
}}</ref>

Amplitude measurements
*Eye amplitude
*Eye crossing amplitude
*Eye crossing percentage
*Eye height
*Eye level
*Eye signal-to-noise ratio
*Quality factor
*Vertical eye opening
Time measurements
*Deterministic jitter
*Eye crossing time
*Eye delay
*Eye fall time
*Eye rise time
*Eye width
*Horizontal eye opening
*Peak-to-peak jitter
*Random jitter
*RMS jitter
*CRC jitter
*Total jitter

===Interpreting measurements===
{| class="wikitable" 
!Eye-diagram feature!!What it measures
|-
|Eye opening (height, peak to peak)||Additive [[noise]] in the signal
|-
|Eye overshoot/undershoot|| [[distortion]] due to interruptions in the signal path
|-
|Eye width||Timing synchronization & [[jitter]] effects
|-
|Eye closure||Intersymbol interference, additive noise
|}