System Overview
R&S
®
ZVA
86
Quick Start Guide 1145.1090.62 ─ 10
errors, the accuracy requirements of the measurement, on the test setup and on the types
of calibration standards available.
Due to the analyzer's calibration wizard, calibration is a straightforward, menu-guided
process. Moreover, it is possible to perform the entire calibration process automatically
using a Calibration Unit (accessories R&S ZV-Z5x).
The system error correction data determined in a calibration procedure are stored on the
analyzer. You can read these correction data using the remote control command
[SENSe<Ch>:]CORRection:CDATa
. You can also replace the correction data of the
analyzer by your own correction data sets.
A red label "Cal Off !" appears behind the trace list if the system error correction no longer
applies to one or more traces:
This may happen for one of the following reasons:
●
The sweep range is outside the calibrated frequency range.
●
The channel calibration is not sufficient for the measured quantity (e.g. a one-port
calibration has been performed, but the measured quantity is a transmission param-
eter).
●
The system error correction has been switched off deliberately ("Correction Off").
●
The analyzer provides other labels to indicate the status of the current calibration;
refer to the Help system for details.
3.4.1 Calibration Standards and Calibration Kits
A calibration kit is a set of physical calibration standards for a particular connector type.
The magnitude and phase response of the calibration standards (i.e. their S-parameters)
must be known or predictable within a given frequency range.
The standards are grouped into several types (Open, Through, Match,...) corresponding
to the different input quantities for the analyzer's error models. The standard type also
determines the equivalent circuit model used to describe its properties. The circuit model
depends on several parameters that are stored in the cal kit file associated with the cal-
ibration kit.
As an alternative to using circuit models, it is possible to describe the standards by means
of S-parameter tables stored in a file.
The analyzer provides a large number of predefined cal kits but can also import cal kit
files and create new kits:
●
A selection of predefined kits is available for all connector types. The parameters of
these kits are displayed in the "Add/Modify Standards" dialog, however, it is not pos-
sible to change or delete the kits.
Calibration
