Rohde & Schwarz SCV8000E/R - Page 156

Chapter 5 Operating
2104.6536.72 - 5.74 - E-1
 Curve Data Amplitude Read: Reads out the amplitude characteristic set in the nonlin-
ear precorrector and shows it in the display level.
 Edit History Amplitude Undo / Redo / Clear: History memory; settings in the drawing
level can be undone step by step and redone. The history memory can also be cleared.
Functions, area 2
The following settings are possible:
 Correction Phase > On/Off: Switches the phase precorrection on or off.
 Correction Phase Clear: Clears the data in the precorrector for the nonlinear phase
precorrection; you will be asked if you are sure you want to do this.
 Curve Data Phase Write: Writes the nonlinear precorrector with the phase characteris-
tic modeled in the drawing level.
 Curve Data Phase Read: Reads out the phase characteristic set in the nonlinear pre-
corrector and shows it in the display level.
 Edit History Phase Undo / Redo / Clear: History memory; settings in the drawing level
can be undone step by step and redone. The history memory can also be cleared.
Graphics area 1: Modeling of the amplitude characteristic
The NonLinear Amplitude diagram (in graphics area 1) has a coordinate system for dis-
playing and editing the amplitude characteristic.
The x axis is used to display the drive level A in %. Note that 100% corresponds to the max-
imum system drive level. The y axis is used to display the delta drive level dA in % relative
to the maximum drive level. The scale ranges from -50% to +50%.
The diagram has a drawing level and a display level.
In the drawing level, you can model the amplitude characteristic (red curve) locally. With the
mouse, the contextual menu and the navigator window, you can draw a new curve or load
and edit an existing curve. The characteristic data are then written into the precorrector us-
ing Curve Data Amplitude Write.
A curve read from the precorrector (Curve Data Amplitude Read) is shown in the display
level (blue curve). The Edit Read Curve contextual function you to transfer this curve to the
drawing level for editing. The contextual menu also lets you hide the display level.
The diagram indicates if nonlinear amplitude precorrection is switched off. The display and
drawing levels still remain active, however.
For further details, please see the "Characteristic Curves" section.
Graphics area 2: Modeling of the phase characteristic
The NonLinear Phase diagram (in graphics area 2) has a coordinate system for displaying
and editing the phase characteristic.
The x axis is used to display the drive level A in %. Note that 100% corresponds to the max-
imum system drive level. The y axis is used to display the delta phase dP in angular de-
grees [°]. The scale ranges from -45° to +45°.