User guide

Marks the lower edge of the eye window boundary
• Right Boundary
Marks the higher edge of the eye window boundary
Set the criteria for eye width and eye height.
• Eye width at crossing point
This parameter gives the eye width at the crossover. Total is 100% of the display
screen.
• Eye width custom
This parameter gives the eye width at a specific percent of the eye amplitude.
(Starting from low level to high level).
• Eye height
This parameter gives the eye height at a specific percent of 1ui. (Starting from left
to right).
Set the criteria for the decimal placing in the return values.
• Decimal Places
This parameter sets the decimal placing for the Automated Eye Parameter
Measurement.
Set the criteria for the optical parameters. These are used to convert level values
to optical power values.
"power value" = ("level value" - "dark level") * "conversion gain"
• Dark Level
Internally generated offset signals.
• Conversion Gain
Is used to convert voltage level into power.
• dBm
Output will be displayed in dBm.
power value[dBm]=10*log(power value[W]/1mW)
• W
Output will be displayed in Watt
Set the criteria for the Extinction Ratio Unit
• Ratio
6 Advanced Analysis
334 Agilent J-BERT N4903B High-Performance Serial BERT
Eye Width/Height
Table Number format
Optical Parameters
Power Unit
Extinction Ratio Unit