Concepts and features
R&S
®
ZNB/ZNBT
181
User Manual 1173.9163.02 ─ 62
4.5.3
Calibration pool
The calibration "Pool" is a collection of correction data sets (cal groups) that the ana-
lyzer stores in a common directory
C:\Users\Public\Documents\Rohde-Schwarz\Vna\Calibration\Data
. Cal
groups in the pool can be applied to different channels and recall sets. Each cal group
is stored in a separate file named
<CalGroup_name>.cal
. The cal group name can
be changed in the "Calibration Manager" dialog.
One of the available cal groups can be set as "Preset User Cal", i.e. the user correction
data that should be restored after a user-defined preset.
If a new channel is created, the channel calibration of the active channel is also applied
to the new channel. See also
4.5.4
Calibration labels
The following labels in the trace list inform you about the status or type of the current
system error correction.
Table 4-10: Calibration labels (system error correction)
Label
Meaning
Cal
The system error correction is applied without interpolation. This means that a set of
measured correction data is available at each sweep point.
Cal int
The system error correction is applied, however, the correction data for at least one
sweep point is interpolated from the measured values. This means that the channel
settings have been changed so that a current sweep point is different from the cali-
brated sweep points. It is not possible to disable interpolation.
Cal Off
The system error correction is no longer applied (e.g. "User Cal Active" is disabled).
See also
4.5.5
Automatic calibration
A calibration unit is an integrated solution for automatic system error correction of vec-
tor network analyzers. Rohde & Schwarz offers a wide range of calibration units for dif-
ferent frequency ranges and connector types. The connector types of the calibration
unit should be selected according to the connector types of the DUT.
The calibration units contain calibration standards that are electronically switched when
a calibration is performed. The calibration kit data for the internal standards is also
stored in the calibration unit, so that the analyzer can calculate the error terms and
apply the calibration without any further input.
Calibration
