R&S
®
ZVL System Overview
Basic Concepts
Quick Start Guide 1303.6538.62-01 74
The settings correspond to the most common commands in the Trace – Trace Select,
Trace – Trace Funct, Trace – Meas, Trace – Format and Trace – Scale menus.
A red label Cal Off ! appears behind the trace list if the system error correction no
longer applies to one or more traces; see Calibration Overview.
3.1.5.5 Markers
Markers are tools for selecting points on the trace and for numerical readout of
measured data. The analyzer provides three different basic marker types.
E A (normal) marker (Mkr 1, Mkr 2, ...) determines the coordinates of a measurement
point on the trace. Up to 10 different normal markers can be assigned to a trace.
E A reference marker (Ref) defines the reference value for all delta markers.
E A delta marker (
) indicates the coordinates relative to the reference marker.
E The stimulus value of a discrete marker always coincides with a sweep point so
that the marker does not show interpolated measurement values.
The markers 1 to 4 are also used for bandfilter search mode. The examples below
show a bandpass search and a bandstop search, respectively.
E Mkr 1 indicates the maximum (minimum) of the peak.
E Mkr 2 and Mkr 3 indicate the lower and upper band edge where the trace value
has decreased (increased) by a definite Level value.
E Mkr 4 indicates the center of the peak, calculated as the arithmetic mean value of
the LBE and UBE positions.
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