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2-3 Marker and Limit Capabilities
If multiple markers are displayed in the table, and if the marker data is displayed with
overlapping text, then the readout format can be set to Small with the Marker Text Size
soft key in the Readout Format menu. To see an example of overlapping test that is
made more clear with this feature, refer to
Setting Up Delta Markers
If the intent is to conduct a delta measurement, then two markers are necessary: one for the
reference and one for the delta. As an example:
1. Turn on Marker 1 (the Ref marker) and assign it to a trace.
2. Turn on Marker 2 and toggle the Marker Type from Ref to Delta.
3. Assign Marker 2 to Marker 1 by specifying the Avail Ref Mkr to Marker 1.
The third step allows you to specify marker delta on one trace, and it also allows you to
specify marker delta between two traces.
Note that the Select Marker list box includes the current location, readout style, and delta
status (if they exist). Otherwise, it indicates Off.
Setting Up Limits
The following description is a brief reminder. For a more detailed description of limits, refer
to section
"Limit Menus" on page
Each trace with a rectangular graph (not Smith Chart or Polar) can be assigned both an
upper limit and a lower limit. The limits can apply to the entire trace or to a portion of the
trace, as desired. To set up a simple limit, select the limit menu (refer to
on page
6-39) by pressing the Shift key and the Limit (6) key, and then select the active trace.
Choose Upper or Lower by pressing the Limit soft key. Next, press the Limit State soft key to
toggle the limit line from Off to On (Notice how the limit line is now displayed on the active
trace). Adjust limit values by using the Limit Edit submenu, which allows you to adjust the
entire limit line or each point of the limit line. Limit Alarm and Pass Fail Message can be
separately assigned for each limit line or for each limit point.
Markers on a Touch Screen
The touch screen marker placement feature is active only when the Marker menu is
displayed. If the Marker menu is not displayed, then the touch screen behavior differs (refer
to
"Touch Screen Trace Features" on page
Moving a Marker
In both VNA Measurements view and Field Measurements view on touch screen instruments,
whether Trace Format is Single, Dual, Tri, or Quad (VNA view) or whether Display Type is
Single, Dual or Overlay (Field view), you can move an active marker on the active trace by
touching anywhere on the sweep window of the active trace, but only when the Marker menu
is displayed.
If you touch an inactive trace (when more than one trace window is displayed), your first
touch selects the trace as the active trace. Lift your finger and touch again to move the active
marker.
2-8
Figure 12-4
6-38.
2-3).
PN: 10580-00289 Rev. K
VNA Display Overview
and
Figure 12-5 on page
"Limit Menu"
Vector Network Analyzer MG
12-5.
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