Chapter 5 Operating
2104.6536.72 - 5.71 - E-1
Functions, area 1
The following settings are possible:
Correction Amplitude > On/Off: Switches amplitude frequency response precorrection
on or off.
Correction Amplitude Clear: Clears the data in the precorrector for the amplitude fre-
quency response precorrection; you will be asked if you are sure you want to do this.
Curve Data Amplitude Write: Writes the linear precorrector with the amplitude frequen-
cy response modeled in the drawing level.
Curve Data Amplitude Read: Reads out the amplitude frequency response set in the
linear 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 Groupdelay > On/Off: Switches group delay precorrection on or off.
Correction Groupdelay Clear: Clears the data in the precorrector for the group delay
precorrection; you will be asked if you are sure you want to do this.
Curve Data Group Delay Write: Writes the linear precorrector with the group delay
modeled in the drawing level.
Curve Data Groupdelay Read: Reads out the group delay set in the linear precorrector
and shows it in the display level.
Edit History Groupdelay Undo / Redo / Clear: History memory; settings in the draw-
ing level can be undone step by step and redone. The history memory can also be
cleared.
Graphics area 1: Modeling of the amplitude frequency response
The Linear Amplitude diagram (in graphics area 1) has a coordinate system for displaying
and editing the characteristic for the amplitude frequency response. The x axis is used to
show the frequency f in MHz relative to the carrier or to the center frequency. The y axis
shows the amplitude A in dB. The scaling on both axes is system-dependent.
The diagram has a drawing level and a display level.
In the drawing level, you can model the amplitude frequency response (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 precor-
rector using 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 allows 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 amplitude frequency response precorrection is switched off. The
display and drawing levels still remain active, however.
For further details, please see the "Characteristic Curves" section.
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