XT2640 Operating Manual
13 July 2016
Page 66 of 187
If no traces are enabled to be shown on the chart then NO TRACES SELECTED is displayed on the chart and the chart is
blank.
You may change the trace selections as required without having to capture further data. All signals within the VPA are
always captured with full resolution, allowing the trace colors, the trace signals, or the trace scaling and offset to be altered
at will after the capture.
The scaling for the traces may be altered to ensure the best fit on the chart by pressing the AUTOSCALE button on the SCOPE VIEW
screen. When pressed, the XT2640 changes the configured scaling to the optimum 1/2/5 scaling to just maintain each trace within
the extents of the chart.
12.10.2.4.1
Using
the
Cursor
and
Zooming
the
View
A vertically drawn cursor may be placed on to the chart by you. There are three ways of achieving this –
Pressing the CURSOR button at the top of the screen, this action places a cursor at the last used position of the cursor or at
the trigger position if the cursor has not been used before.
Or, pressing anywhere on the chart, this action places a cursor at the position pressed. You may drag the cursor in this
manner, or may reposition the cursor by pressing somewhere else on the chart.
Or, using the INRUSH capture mode. This automatically places a cursor at the maximum signal of trace 1.
The screen below shows the capture of an inrush current zoomed in on the initial inrush peak.
When the cursor is shown –
The CURSOR button is highlighted colored green
The time position of the cursor is shown above the cursor line
The textual data in the left side of the screen changes to show the signal level captured for each trace at the time of the
present cursor position.
You may zoom the chart horizontally by pressing the ZOOM button; when pressed you are prompted the select the zoom
timebase. While zoomed –
When the ZOOM button is pressed the cursor position is centered in the screen.
The ZOOM button is highlighted colored green.
The cursor remains set to the same time as it was prior to zooming, but it may still be moved within the timespan
of the zoomed chart by pressing at the desired location within the chart.
The cursor may be moved beyond the left and right ends of the timespan being viewed by dragging it beyond
those edges, in that case the cursor remains at the edge and the chart timespan being shown is changed. This
enables you to ‘drag’ the timespan being viewed without having to zoom back out.
Any zoom can be cancelled and the screen returned to the non‐zoomed state without a cursor at any time by pressing the
CURSOR button while it is highlighted.
12.10.2.5
EXPORTING
OR
RECORDING
SCOPE
VIEW
DATA
The methods for performing this are fully described in section 23.
The SCOPE VIEW data can be exported to a .CSV format textual file on an external USB drive attached to the front panel USB port.
This file contains a tabulation of the points in each SCOPE VIEW waveform for all channels.
Briefly, this is performed by –
1.
Insert the drive into the front panel USB port and wait for it to be READY.
2.
Press the DRIVE INFO area of the screen, the screen shows the file export/import screen.
3.
Press the SCOPE DATA button. The screen changes to allowing you to enter a file name.
4.
Enter the desired file name (the extension is automatically provided).
5.
If the file already exists then you are prompted to respond if you wish to overwrite it or not.
6.
The file is then written.
