User Correction - R&S SMB100A Operating Manual

®
R&S SMB100A
Refer to the manual of the connected R&S NRP-Zxx power sensor for a description on
how to use the SParameter table.
Remote command:
:SENSe<ch>[:POWer]:CORRection:SPDevice:STATe
5.3.5.6

User Correction

The "User Correction" function is used to create and activate lists in which level correc-
tion values predefined by the user are freely assigned to RF frequencies. Correction is
performed by the user-defined table values being added to the output level for the
respective RF frequency.
With frequencies which are not contained in the list, the level correction is determined
by interpolation of the closest correction values.
The lists are created in the "List Editor". Each list is stored in its own file with the prede-
fined file extension *. uco. The name of the User Correction file can be freely
selected. The files are loaded from the "Lists..." file manager. Externally created tables
with pairs of frequency and level values can be converted into User Correction files
using the import function. The external files must have the file extension *.txt or
*.csv. These file formats are provided e.g. by the Microsoft Excel program. The sepa-
rators for table columns and for decimal floating-point numerals can be set. In addition,
internally created User Correction data can be exported into ASCII files using the
export function.
The amplitude can also be linearized automatically by means of an R&S NRP power
sensor connected to one of the generator output signals. With the aid of the "Fill with
Sensor" function, a table with correction values for external test assemblies can be
automatically determined, e.g. for compensating the frequency response of cables.
The User Correction list with the correction values acquired by the sensor is generated
in the "Edit User Correction List" menu. The correction values can be acquired any
time irrespective of the modulation settings of the generator.
If user correction is activated, the "UCOR" display (User Correction) is shown in the
header together with the "Level" display. The RF output level is the sum of both values.
"Level" + "UCOR" = Output level
If activated, user correction is effective in all operating modes.
User Correction Menu
To open the "User Correction" menu, select "RF > Configure > User Correction" or use
the MENU key under "RF".
The combined menu "ALC/UCOR" is divided into the several sections.
User Correction Settings
The "User Correction" settings are set in the most lower section of the combined dia-
log; this section is used to activate/deactivate user correction, and to create, select and
activate the lists.
Operating Manual 1407.0806.32 ─ 21
Instrument Function
RF Block
on page 317
158