Interpolation; Invert Correction Values - R&S SGT100A User Manual

®
R&S SGT100A
"Polynomial"
"Normalized"
Remote command:
[:SOURce<hw>]:IQ:DPD:SHAPing:MODE

Interpolation

Enabled in "Shaping > From Table/Normalized".
A predistortion function defined in a table contains a limited number of value pairs. This
parameter enables a linear interpolation between the defined values to prevent abrupt
changes.
Table 7-13: Effect of parameter "Interpolation"
"Interpolation > Off"
Remote command:
[:SOURce<hw>]:IQ:DPD:SHAPing:TABLe:INTerp

Invert correction values

Inverts the defined correction values.
Use this function to apply the exact invert predistortion coefficients without to change
the defined predistortion table.
This function is also useful to toggle between predistortions with corrections related to
the input power and to the output power.
User Manual 1176.8674.02 ─ 07
By a polynomial with configurable order and coefficients.
Select "AM/AM or AM/PM Polynomial Coefficients" to access the set-
tings, see Chapter 7.6.3.4, "Polynomial Coefficients
on page 193.
As a normalized data.
Select "Normalized Data" to access the settings, see
"Normalized Data Settings",
Signal Generator Settings
Applying Digital Predistortion
on page 196.
on page 454
"Interpolation > Linear (Power)"
on page 455
Settings",
Chapter 7.6.3.5,
189