Introduction
R&S
®
ZN-Z3x
5
User Manual 1177.6381.02 ─ 03
1
Introduction
The measurement accuracy of a Vector Network Analyzer (VNA) heavily depends
on a careful user calibration. Any deviation of the test setup after the calibration
process inevitably produces errors. In case of a massive system error correction
(e.g. if long RF cables with high damping or switch matrices are used), those
deviations can lead to strongly altered measurement results. Especially in remote
scenarios such as multiport measurements, a re-calibration using traditional cali-
bration kits or calibration units is a costly and time consuming process.
The Rohde & Schwarz Inline Calibration System R&S
ZN-Z3x allows re-calibrat-
ing a running measurement setup without mechanically changing the measure-
ment setup. For each DUT port an Inline Calibration Unit (ICU) is inserted
between the corresponding VNA test port and the DUT. The ICU remains within
the signal path throughout the measurement (low-loss through path) and, on
request of the VNA, performs a full one-port calibration (OSM) in-situ.
In order to perform full multiport measurements an initial calibration of the system
has to be done.
Figure 1-1: Inline Calibration Unit
Control connections are established via a central Inline Calibration Controller
(ICC) with
●
2 CAN bus interfaces towards the ICUs
●
LAN and USB interface for remote control
