Agilent Technologies 86038A User Manual page 117

Display Menu
Define Trace
GD Options Area
Agilent 86038A Optical Dispersion Analyzer, Third Edition
Assigns a measurement on a specified port to a specific trace on the
graph. Up to two measurement traces can be assigned to each of the four
graphs.
The following example will show you how to assign the CD trace and the
DGD trace for Port 2.
1 From the Navigation area, press Change View until all four traces are shown on
the display.
2 From the Navigation area, press Next Trace until the desired graph and trace tab
are highlighted (that is, shown in white).
3 From the Display area, press Define Trace.
4 In the Define Trace setup panel, select Port 2 and CD as the Measurement type.
5 From the Navigation area, press Next Trace to highlight the second trace tab on
the graph.
6 In the Define Trace setup panel, select Port 2 and DGD as the measurement type.
7 Press Close to save the trace definitions.
For each trace you can specify either Port 1 or Port 2 measurement traces
and one of five measurement types.
GD (Group Delay)
CD (Chromatic Dispersion)
DGD (Differential Group Delay)
PDL (Polarization Dependant Loss)
Gain Loss
Show DGD Contribution
Displays error bars on the group delay trace to show how much the GD
varied do to polarization scanning. This option only applies when DGD data
exists. See "CD/PMD''.
GD Source
By default, the CD trace is calculated using the slope of the actual GD
trace. If a GD trace has been smoothed or curve fitted, selecting that trace
as the GD Source may provide a lower noise CD trace.
Function Reference
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