Instrument Function
R&S
®
SMBV100A
181
Operating Manual 1407.6062.32 ─ 08
"Off (Table)"
Deactivates internal level control.
For each change in the level or frequency, the instrument adjusts the
level using an attenuation setting in a predefined table (ALC table).
The table values are measured in advance and saved with function
on page 181. The table is stored in the
memory of the instrument. Level attenuation between two table values
is done by means of linear interpolation.
This functionality enables faster level adjustments, since the output
signal is not interrupted by the measurement, and also not disturbed.
SCPI command:
SCPI command:
Search Once - ALC
Forces the generator to execute level adjustment once, although the "Sample & Hold"
mode is active.
SCPI command:
Adjust ALC Table - ALC
Saves ALC readings in an ALC table.
The R&S SMBV performs ALC adjustments according to these predefined values whith
the function
> "Off (Table)".
SCPI command:
5.4.10 User Correction
The "User Correction" function is used to create and activate lists in which level correction
values predefined by the user are freely assigned to RF frequencies. Correction is per-
formed 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 predefined
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 separators for table col-
umns 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
RF Signal and Analog Modulations - RF Block
Summary of Contents for SMBV100A
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