Agilent Technologies 86038A User Manual page 211

Base Commands Programming Commands
ByVal measurementType As
InstrumentObjects.ODACommon.eMeasurementType - The type of
measurement to display: CD, Gain/Loss, GD, PDL, or DGD.
VB.NET Syntax
odaClient.Display.DefineTrace(0, _
InstrumentObjects.ODACommon.eTraceLetter.TraceA, _
InstrumentObjects.ODACommon.eODAPort.One, _
InstrumentObjects.ODACommon.eMeasurementType.GD)
VB 6.0 Syntax
Call odaClient.Display.DefineTrace(0, _
eTraceLetter_TraceA, _
eODAPort_One, _
eMeasurementType_GD)
GDOffsetMode Property
The ODA normally sets the group delay at the center trace point to zero.
Writing a value to this property can change the point that is zeroed to the
minimum or maximum of the trace. Reading the value of the property
returns the current setting.
Property Value
InstrumentObjects.ODASensitivity.eGDOffsetMode
VB.NET Syntax
odaClient.Display.GDOffsetMode = _
InstrumentObjects.ODASensitivity.eGDOffsetMode.CenterPoint
VB 6.0 Syntax
odaClient.Display.GDOffsetMode = eGDOffsetMode_CenterPoint
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Agilent 86038A Optical Dispersion Analyzer, Third Edition