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Concepts and Features
R&S
®
ZNB/ZNBT
226
User Manual 1173.9163.02 ─ 55
5.7.6
Frequency Resolution 1 mHz
Option R&S
ZNB/ZNBT-K19
This software option improves the frequency resolution of a R&S
ZNB/ZNBT to 1
mHz.
5.7.7
Measurement Uncertainty Analysis
Option R&S
ZNB-K50/R&S
ZNB-K50P
Measurement uncertainty analysis is available if option R&S
ZNB-K50 and METAS
VNA Tools (version 2.2.6 or higher) are installed on the instrument.
Option R&S
ZNB-K50
P
offers the same functionality as option R&S
ZNB-K50, but
comes with METAS VNA Tools
p
reinstalled. It can be shipped with new instruments or
installed at Rohde&Schwarz service.
The purpose of the METAS VNA Tools software is to compute uncertainties of S-
parameter measurements. After registration, you can download it from the VNA Tools
Internet site (
).
●
The uncertainty analysis of the METAS VNA Tools is limited to S-parameter mea-
surements. Uncertainty analysis of wave quantities is not supported.
●
The uncertainty calculations are in line with EURAMET Calibration Guide No. 12
Version 3.0 (03/2018).
●
For the R&S
ZNBT, the "Measurement Uncertainty Analysis" option is
not availa-
ble
.
METAS Calibration
The VNA firmware directly interacts with the DLLs of the METAS VNA Tools. During a
"METAS Calibration", the VNA firmware collects all data that are required to set up a
METAS VNA Tools project. After the "METAS Calibration"
is comple-
ted, the analyzer is ready for real-time uncertainty analysis: after each sweep it passes
the raw (uncalibrated) S-parameters to the VNA tools and receives the calibrated S-
parameters plus uncertainties (95% confidence ellipse in the complex plane) in return.
The calibrated S-parameter traces plus their uncertainty bands can be displayed in
magnitude, phase, real and imaginary
. The display of uncertainties in
complex diagrams (polar, Smith) is not supported.
Optional Extensions and Accessories