Rohde & Schwarz SCV8000E/R, Системное руководство

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Chapter 5 Operating
2104.6536.72 - 5.72 - E-1
Graphics area 2: Modeling of the group delay
The Linear Groupdelay diagram (in graphics area 2) has a coordinate system for display-
ing and editing the characteristic for the amplitude frequency response. The x axis is used
to display the frequency f in MHz relative to the carrier or to the center frequency. The y axis
shows the group delay time t in ns. The scaling on both axes is system-dependent.
Otherwise, this works analogously to graphics area 1 except that the corresponding func-
tions (e.g. for Read/Write) are found in area 2.
The diagram indicates if group delay precorrection is switched off. The display and drawing
levels still remain active, however.
In the contextual menu for the group delay precorrection, you can use the Reduce Delay
Range and Enlarge Delay Range commands to select between the two scalings for the y
axis. It is possible to display the following ranges of values:
For further details, please see the "Characteristic Curves" section.
5.4 Setting Nonlinear Precorrection
The Nonlinear operating field is for setting nonlinear precorrection defaults to equalize non-
linearities in the output stage.
Nonlinear precorrection is a significant factor in the shoulder distance that is achieved.
Linear Precorrection
Reduced 0 ns to 750 ns
Enlarged 0 ns to 1500 ns