Справочник Пользователя для Rohde & Schwarz Inc SLV8000
Chapter 5
Operating
2100.4400.32
- 5.120 -
E-2
13.2.2
Graphics Areas
The graphics area basically consists of display and drawing levels. In many operating fields,
the drawing level is not necessary.
the drawing level is not necessary.
Display level (blue characteristic)
In the display level, the characteristic that is currently set in the precorrector is displayed. If
the precorrector function is switched off, a note to this effect will appear in the diagram.
the precorrector function is switched off, a note to this effect will appear in the diagram.
To display the characteristic, the database is read from the precorrector and the curve is
computed with the same function as forms the basis of computation for the setting param-
eters and the FPGA. This ensures that the display and the effect are exactly matched.
computed with the same function as forms the basis of computation for the setting param-
eters and the FPGA. This ensures that the display and the effect are exactly matched.
In addition, the display level also contains additional functions such as the position of the
carrier frequency or center frequency, notable drive level of the signal or the position of
thresholds relative to the display range.
carrier frequency or center frequency, notable drive level of the signal or the position of
thresholds relative to the display range.
Drawing level (red characteristic)
In the drawing level, you can create a new characteristic or edit an existing one.
You can access the database data for the characteristic for further processing from the dis-
play level. The curve is edited directly on the data from the database. The remainder of the
curve is computed with the same function as in the display level.
play level. The curve is edited directly on the data from the database. The remainder of the
curve is computed with the same function as in the display level.
A contextual menu provides support in the process of editing curves. A navigator window
can be used to make a fine setting.
can be used to make a fine setting.
Note
The drawing levels are supported only in the operating fields for linear precorrection and
nonlinear precorrection. Only the display level supports nonlinear frequency response pre-
correction. At this level it is not possible to edit characteristic curves.
nonlinear precorrection. Only the display level supports nonlinear frequency response pre-
correction. At this level it is not possible to edit characteristic curves.
13.2.3
Characteristic Curves
The following settings are necessary in the functional area to create characteristic curves
manually or edit them:
manually or edit them:
Corr > On (precorrection active)
Correction Amplitude > On (upper characteristic active) or
Correction Groupdelay / Phase > On (lower characteristic active)
There are two ways of modeling a characteristic:
– Draw a new characteristic and edit the points.
– Load an existing characteristic (predefined characteristic or a characteristic saved on
– Load an existing characteristic (predefined characteristic or a characteristic saved on
the hard drive) and edit the points.
Modeling a characteristic involves use of the mouse, contextual menu and navigator win-
dow.
dow.