Concepts and Features
R&S
®
ZNC
62
User Manual 1173.9557.02 ─ 13
The following rules ensure a maximum of flexibility:
●
Ranges do not have to be sorted in ascending or descending order (e.g. the "Start
Stimulus" value of range no. n doesn't have to be smaller than the "Start Stimulus"
value of range no. n+1).
●
Overlapping ranges are allowed. The limit check in the overlapping area is related to
the tighter limit (the pass test involves a logical AND operation).
●
Gaps between ranges are allowed and equivalent to switching off an intermediate
ripple limit range.
●
Ripple limit ranges can be partially or entirely outside the sweep range, however, the
limits are only checked at the measurement points.
The following figure shows a ripple limit test involving 3 active ranges.
The limit line rules for logarithmic sweeps and segmented frequency sweeps with point
based x-axis also apply to ripple limit lines (see
chapter 3.4.1.1, "Rules for Limit Line
3.4.1.3
Circle Limits
A circle limit is a special type of
upper
limit line which is defined by its center coordinate
in the diagram and its radius. Depending on the diagram type, circle limit can serve dif-
ferent purposes:
●
With a circle limit line centered around the origin of a polar diagram, you can check
whether the magnitude of the measurement results exceeds a limit, defined by the
radius of the limit line.
Operations on Traces
