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
.
