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93 SNA5000A Vector Network Analyzer User Manual
4 Data analysis
4.1 Marker
The marker can display defined measurement data of traces. Each trace can set nine
ordinary markers and one reference marker.
Ordinary marker:
Press the Marker button on the front panel, click Add Marker in the Marker submenu to
create a marker, then set the required test frequency. if there are many markers on the trace,
click Select to select the desired marker. After the marker is created, the measurement value
of the marker will be displayed at the top right of the window, and the value format is the same
as the format of the trace. We can click the Delete Marker command under the marker
submenu to delete the marker and select the marker to delete from the pop-up menu. When
a trace is deleted, all markers on the trace will be deleted. Click the All Off command under
the Marker submenu or the Marker Setup submenu to delete all markers on the current trace.
Reference marker:
Press the Marker button on the front panel, click Reference Marker in the Marker submenu,
make the On option selected then the Reference Marker will be created. By default, the
Reference Marker is created at the location of the current ordinary Marker. If there is no
ordinary Marker on the current trace, the Reference Marker will be created at the center of
the trace. Reference Markers are denoted by an R. After creating a Reference Marker, set
the Reference Marker as value discretization, fixed marker, and coupling, we can set the data
format of Reference Marker’s display value and view the Reference Marker’s value in the
marker table, but the Reference Marker cannot be set as a difference (delta) marker. Click
Reference Marker in the Marker submenu, select the Off option to delete the Reference
Marker.
Marker setting:
Press the Marker button on the front panel, set the current marker in the Marker Setup
submenu, we can make the following settings for the currently selected marker:
1. Difference (delta) display: The difference display mode is closed by default, to open the
difference display mode, click the Delta to select the On option,
then the marker’s value will display the difference between the
ordinary marker and the reference marker, and the marker’s
value is marked with "Δ". If a reference marker has not been
added to the trace, the reference marker will be automatically
set on the trace. To display the absolute value of the marker,
click the Delta again to select the Off option.
2. Value discretization: The value discretization mode is closed by default. Due to the
limited number of sampling points set on the trace, the data of
other points except the sampling points are based on the
interpolation value of the sampling point data, which is approximate
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