R&S ZVL GUI Reference
Trace Menu
Operating Manual 1303.6580.32-06
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the delay at the marker position vanishes.
T
he del
ay 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.
Marker Search
The Marker Search menu uses markers to locate specific points on the trace.
Search functions
The search functions are tools for searching measurement data according to specific criteria. A search
consists of analyzing the measurement points of the current trace (or of a user-defined subrange termed
the Search Range) in order to find one of the following:
• Absolute or relative (local) maxima and minima (minimum/maximum search).
• Trace points with a specific response value (target search).
• Trace segments with a shape that is characteristic for bandpass or bandstop filters (bandfilter
search).
When the search is activated, the active marker is moved to the (next) point that meets the search criteria.
If the trace contains no markers, a Mkr 1 is created and used for the search. The search result is
displayed in the marker info field. If no search result can be found, the marker remains at its original
position.
Some search functions can be activated repeatedly in order to find all possible search results. Moreover
the analyzer provides a Tracking mode where the search is repeated after each sweep.
• Max Search sets the active marker to the absolute maximum in the search range.
• Min Search sets the active marker to the absolute minimum in the search range.
• Peak Search > sets the active marker to the next peak with higher stimulus value.
• < Peak Search sets the active marker to the next peak with lower stimulus value.
• Target opens a submenu to search for a specific value on the trace.
• Bandfilter opens a submenu to search for trace segments with characteristic bandfilter shape and
calculate the filter parameters.
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