R&S ZVB - Lines

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 223
Max = Marker
Sets the upper edge of the diagram equal to the response value of the active marker, leaving its lower
edge unchanged. The vertical divisions (Scale Div.) are adjusted accordingly.
Min = Marker
Sets the lower edge of the diagram equal to the response value of the active marker, leaving its upper
edge unchanged. The vertical divisions (Scale Div.) are adjusted accordingly.
Zero Delay at Marker
Corrects the measurement result by adding or subtracting a constant group delay. This function must be
applied to a trace which is displayed in group delay format. The trace is shifted in vertical direction so that
the delay at the marker position vanishes.
The delay represents the propagation time of the wave across the DUT, so this operation corresponds to a
electrical length compensation, i.e. to a shift of the reference plane by adding to or subtracting from the
test port a simulated lossless transmission line of variable length. The correction must be carried out on
the Delay trace but has an impact on all trace formats.
A standard application of Zero Delay at Marker is correction of the constant delay caused by the
interconnecting cables between the analyzer test ports and the DUT (line stretch).
The Zero Delay at Marker function modifies the Offset parameters and therefore influences the entire
channel.
Lines
Trace - Lines
The commands in the Lines submenu define limits for the measurement results, visualize them in the
diagrams and activate/deactivate the limit check. The analyzer provides upper, lower, and ripple limits.
Besides the menu provides a horizontal line for each trace.
Limit Lines
A limit line is a set of data to specify the allowed range for some or all points of a trace. Typically, limit
lines are used to check whether a DUT conforms to the rated specifications (conformance testing).
 The upper limit line defines the maximum value for the trace points.
 The lower limit line defines the minimum value for the trace points.
 The ripple limit defines the maximum difference between the largest and the smallest response
value of the trace.
A limit check consists of comparing the measurement results to the limit lines and display a pass/fail
indication. An acoustic warning and a TTL signal at the USER CONTROL port can be generated in
addition if a limit is exceeded.
Upper and lower limit lines are both defined as a combination of segments with a linear dependence