R&S SGT100A User Manual page 226

®
R&S SGT100A
c) Select "OK".
9. Select "Polynomial Coefficients > OK" to close the dialog.
Save/Recall
System
Polynomial
Polynomial
Apply,
Save/Recall Polynomial
Accesses the "Save/Recall" dialog, i.e. the standard instrument function for storing and
recalling the dialog-related settings in a file. The provided navigation possibilities in the
dialog are self-explanatory.
The file name and the directory it is stored in are user-definable; the file extension is
however predefined.
The polynomial files are files with extension *.dpd_poly, see
nomial file"
Remote command:
[:SOURce<hw>]:IQ:DPD:SHAPing:POLYnomial:COEFficients:CATalog?
on page 456
[:SOURce<hw>]:IQ:DPD:SHAPing:POLYnomial:COEFficients:LOAD
on page 456
[:SOURce<hw>]:IQ:DPD:SHAPing:POLYnomial:COEFficients:STORe
on page 457
System Coordinates
Defines whether the polynomial function is defined in Cylindrical (Polar) or in Cartesian
coordinates.
Remote command:
n.a.
Polynomial Order
Defines the polynomial order n, that is the number of polynomial coefficients (see
ynomial Function"
The polynomial order defines the degree, complexity, and the number of terms in the
polynomial function.
Remote command:
See
on page 456
Polynomial coefficients
Sets the polynomial coefficients a
In "System Coordinates > Cylindrical", the polynomial coefficients b
expressed in degrees.
The polynomial coefficients influence the shape of the predistortion function, see
ure 7-23
User Manual 1176.8674.02 ─ 07
Polynomial.............................................................................................. 195
Coordinates....................................................................................................195
Order........................................................................................................ 195
coefficients................................................................................................195
OK.................................................................................................................... 196
on page 181. The polynomial function is stored in Cartesian format.
on page 180).
[:SOURce<hw>]:IQ:DPD:SHAPing:POLYnomial:COEFficients
for an illustration of a polynomial function.
to a and b to b .
0 n 0 n
Signal Generator Settings
Applying Digital Predistortion
"File format of the poly-
to b are
0 n
"Pol-
Fig-
195