VNA Concepts and Features
R&S
®
ZNL/ZNLE
233
User Manual 1178.5966.02 ─ 07
Exception:
In a segmented frequency sweep with point-based x-axis, gaps between
the segments are minimized. To facilitate the interpretation, the R&S
ZNL/ZNLE dis-
plays only the limit line segments which provide the limit check criterion (the "tighter"
limit line at each point). In the example below, this rule results in a single, continuous
lower limit line.
8.4.1.2
Rules for Ripple Test Definition
The analyzer places few restrictions on the definition of ripple limit ranges.
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 does not have to be smaller than the "Start Stimu-
lus" 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.
Operations on Traces
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