The Marker Functions use the active marker to define the sweep range, scale the diagram and introduce an electrical length offset.
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The functions in the upper section are also provided in the Search submenu:
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.
Next Peak sets the active marker to the next maximum or minimum in the search range, depending on the current search criterion.
The following functions use the stimulus value of the active marker to define the sweep range:
Center = Marker sets the center of the sweep range equal to the marker value.
Start = Marker sets the beginning of the sweep range equal to the marker value.
Stop = Marker sets the end of the sweep range equal to the marker value.
Span = Marker sets the span of the sweep range equal to the active delta marker value.
The following functions use the response value of the active marker to scale the y-axis of the diagram:
Ref. Value = Marker sets the reference value equal to the marker value.
Max = Marker sets the upper edge of the diagram equal to the marker value.
Min = Marker sets the lower edge of the diagram equal to the marker value.
Zero Delay at Marker corrects the measurement result by adding or subtracting a constant group delay.
Sets the center of the sweep range equal to the stimulus value of the active marker, leaving the span unchanged. The active marker appears in the center of the diagram.
Using
marker functions for diagram scaling
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Remote control: |
Sets the beginning (start) of the sweep range equal to the stimulus value of the active marker, leaving the end (stop) value unchanged. The active marker appears at the left edge of the diagram.
Using
marker functions for diagram scaling
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Remote control: |
Sets the end (stop) of the sweep range equal to the stimulus value of the active marker, leaving the beginning (start) unchanged. The active marker appears at the right edge of the diagram.
Using
marker functions for diagram scaling
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Remote control: |
Sets the span of the sweep range equal to the absolute value of the first coordinate of the active delta marker, i.e. to the difference between the delta marker and the reference marker positions. The function is available only if the active marker is in Delta Mode. The reference marker appears at the right, the delta marker at the left edge of the diagram or vice versa, depending on which of the two markers has the smaller stimulus value.
Using
marker functions for diagram scaling
Sets the reference value equal to the response value of the active marker, leaving the values of the vertical divisions (Scale Div.) unchanged.
Using
marker functions for diagram scaling
Sets the upper edge of the diagram equal to the response value of the active marker, leaving the values of the vertical divisions (Scale Div.) unchanged.
Using
marker functions for diagram scaling
Sets the lower edge of the diagram equal to the response value of the active marker, leaving the values of the vertical divisions (Scale Div.) unchanged.
Using
marker functions for diagram scaling
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.
