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Signal Generator Settings
R&S
®
SGT100A
191
User Manual 1176.8674.02 ─ 07
In "Level Reference > Before/After DPD" mode, the range is limited by the current PEP
of the signal, see
.
Remote command:
Shaping Table
Accesses the standard "Predistortion Select" dialog with functions to define a new
shaping table file, select, or edit an existing one.
The shaping table files are files with predefined extension and file format, see
mat of the correction table file"
You can create a shaping table externally or internally.
"Select"
Selects and loads an existing file
"New"
Creates a file
"Edit"
Access a standard built-in table editor, see
Remote command:
For AM/AM distortions:
[:SOURce<hw>]:IQ:DPD:SHAPing:TABLe:AMAM:FILE:CATalog?
[:SOURce<hw>]:IQ:DPD:SHAPing:TABLe:AMAM:FILE[:SELect]
For AM/PM distortions:
[:SOURce<hw>]:IQ:DPD:SHAPing:TABLe:AMPM:FILE:CATalog?
[:SOURce<hw>]:IQ:DPD:SHAPing:TABLe:AMPM:FILE[:SELect]
Polynomial Coefficients
Accesses a dialog to describe the predistortion function as a polynomial function, see
Chapter 7.6.3.4, "Polynomial Coefficients Settings"
Normalized Data
Accesses a dialog to describe the predistortion function as a normalized data, see
Chapter 7.6.3.5, "Normalized Data Settings"
7.6.3.3
Edit Predistortion Table Settings
The predistortion table is an internal editor where you define the correction values,
Δ
Power and
Δ
Phase, in form of a look-up table.
To access the internal table editor
1. Select "I/Q Mod > Digital Predistortion > AM/AM AM/PM".
2. Select "Digital Predistortion AM/AM AM/PM > Predistortion Settings".
3. Select "Shaping > From Table".
4. Select "AM/AM > Shaping Table > Predistortion AM/AM Shaping File > New"
5. Enter the "File Name", e.g.
My_DPD_AM-AM
The "Predistortion AM/AM Shaping File" dialog closes.
Applying Digital Predistortion