Concepts and Features
R&S
®
ZNB/ZNBT
214
User Manual 1173.9163.02 ─ 53
Eye mask tests are only available for NRZ modulated signals.
Rise Time Measurement
From the measured S parameters, the step responses can also be calculated using the
inverse Fourier transform. The rise time is the time the step response takes to rise from
x% to y% (0≤x≤y≤100) of the resulting step size, typically from 10% to 90%.
Figure 5-17: Rise Time Measurement
Skew Measurement
The skew measurement allows you to compare the step responses calculated from dif-
ferent 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 5-18: 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.
Optional Extensions and Accessories
