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
. W
hen
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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