Concepts and Features
R&S
®
ZNB/ZNBT
202
User Manual 1173.9163.02 ─ 38
Rise Time Measurement
From the measured S parameters also the step responses can be calculated using the
inverse Fourier transform. The rise time is the time the step response takes to rise from
x % to y % of the resulting step size – typically from 10% to 90%.
Figure 4-12: Rise Time Measurement
Skew Measurement
The skew measurement allows to compare the step responses calculated from differ-
ent traces measured on the same analyzer channel. The skew is calculated as the
"delta time" (or length) at user defined percentage of the step size.
Figure 4-13: Skew measurement
For instance, this can be used to evaluate the quality of a balanced transmission line
("intra-pair skew").
Limit Test
Testing against a user-defined skew limit is also supported.
DUT-centric setup
As far as possible the required settings are related to time domain properties of the
DUT, which might be more intuitive for users of digital oscilloscopes that are not famil-
iar with vector network analyzers.
The Automatic Harmonic Grid from the option R&S
ZNB/ZNBT-K2 "Time domain
Analysis" is used to ease setting up the frequency grid for all measurements provided
by the option R&S
ZNB/ZNBT-K20.
Optional Extensions and Accessories
