S820E UG PN: 10580-00343 Rev. H 6-15
VNA Mode 6-5 Active Trace and Markers
6-5 Active Trace and Markers
Notice on the Quad trace format that one trace has a red outline box on the
graph, and the trace number in the Instrument Settings Summary (on the
left side of the sweep window) is outlined with a red rectangle. This is the
active trace, and only one trace is active at a time. Any display or format
selection is applied only to the active trace.
You can change the active trace in two ways:
• In the Measure menu, press the Active Trace submenu key to select the
trace that you want to be active. After a selection, notice how the active
trace indicator on the display has changed. For example, if the active
trace changed from TR1 to TR3, then the red highlight box moved from
the upper left quadrant to the lower left quadrant.
Not only does the graph get highlighted in red, but the Instrument
Settings Summary legend on the left side of the sweep window also
highlights the active trace. This becomes more important when you are
trying to distinguish between active traces and other traces when they
are all overlaid on one graph.
• Touching a trace area or touching the trace data in the Instrument
Settings Summary causes that trace to become active.
Magnifying Glass
When Trace Format is Dual, Tri, or Quad, you can magnify the active trace by
touching the magnifying glass symbol in the upper-right corner of the
active trace.
Touching the magnifying glass symbol of a magnified trace reduces the
trace size to return the display to the selected trace format.
While a trace is magnified, you can still change the active trace selection by
touching the trace data in the Instrument Settings Summary.
Moving a Marker
When Trace Format is Single, Dual, Tri, or Quad, touching a trace can affect
a marker. After the trace is active, you can touch and hold a marker to make
it active. You can then move that marker by dragging with your finger. Your
touch point on the vertical red line of the active marker represents a location
on the x-axis, and this touch point may be anywhere on the y-axis (along the
vertical red line). You can also double-tap (quickly) anywhere within the
active trace window to bring the active marker to the x-axis location of your
touch point. For greater precision, you can maximize the trace (with the
“Magnifying Glass” icon) before moving the marker.
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