Concepts and features
R&S
®
ZNB/ZNBT
98User Manual 1173.9163.02 ─ 62
sweep (implemented in hardware) has to be interrupted by the software regularly and
cannot proceed autonomously after the initial phase lock.
If the swept mode is selected and the R&S ZNB/ZNBT actually uses it (for at least one
segment), this is indicated in the status bar:
If on the other hand the swept mode is not used although it was selected, the underly-
ing reason is displayed in an information popup:
●
The specifications of the data sheet are stated for stepped mode; in swept mode
they are not guaranteed
●
Compared to stepped mode the trace noise in swept mode is generally higher
●
DUTs with long group delay cannot be measured correctly in swept mode
●
It is essential to perform the Calibration with the same stepped/swept mode set-
tings as for the actual measurement; otherwise the calibration is turned off (see
"Cal Off label" on page 163)
4.1.5 Data flow
The analyzer processes the raw measurement data in a sequence of stages to obtain
the displayed trace. The following subsections give an overview.
4.1.5.1 Channel data flow
The diagram below illustrates the data processing stages for the entire channel. All
stages are configurable.
Note that the channel data flow for S-parameters (and quantities derived from S-
parameters such as impedances, admittances, stability factors) differs from the chan-
nel data flow for wave quantities (and derived quantities such as ratios).
Basic concepts
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