R&S SMJ100A, Руководство по эксплуатации

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Instrument Function
R&S
®
SMJ100A
223 Operating Manual 1403.7458.32 ─ 14
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.
Multi level measurements allow to take into account the changing VSWR for the differ-
ent attenuator settings.
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.
5.5.8.1 User Correction Menu
To open the "User Correction" menu, select "RF/A Mod > Configure User Correction"
or use the MENU key under "RF/A Mod".
The combined menu "ALC/UCOR" is divided into the several sections.
The top sections provide access to the level and attenuator settings, see Chap-
ter 5.5.6.2, "RF Level Dialog" , on page 216, and to the automatic level control settings,
see Chapter 5.5.7, "Automatic Level Control - ALC" , on page 220.
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.
RF Signal and Analog Modulations - RF Block