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Chapter 5, FRONT PANEL OPERATION
5.3.29 Double Graph Menu
5-46
SCALE keys
The top and bottom left-hand
limits of the vertical axis with a 1% resolution, the set maximum and minimum
values being shown adjacent to them.
AUTO SCALE keys
The upper and lower middle pairs of left-hand
are used to autoscale the upper and lower limits of the vertical axis to match the
range present in the visible section of the displayed curve.
There is no facility for adjusting the x-axis scale, which always shows up to 243
points. Hence if a curve of more than this number of points is acquired it will not be
possible to show all of the points on the display at the same time.
Curve Selection keys
The keys on the top right-hand side of the display are used to select the curve to be
shown from those stored in the curve buffer. For example, if only X DATA and Y
DATA curves were specified, using the Curve Select sub-menu, as being required
then these would be the only two selections available.
START/STOP keys
In the single graph display mode, acquisition to the curve buffer, and hence display
of data, can be controlled using the Start
CURSOR keys
The bottom right-hand
the displayed cursor, which is only active when data is not being stored, from side to
side. The present point number is shown in the bottom right-hand corner of the
screen and the value of the curve at its intersection with the cursor appears in the top
right-hand corner. Where applicable, values are given as 100 x percentage of full-
scale (e.g. a value of 5000 represents 50% f.s.), since there is no facility to display
them in floating-point format. If the cursor is moved fully to the left then the
displayed data scrolls to the right in groups of ten points, allowing earlier data to be
shown.
If acquisition is in progress then the cursor is automatically positioned at the right-
hand side of the display area and cannot be moved.
Pressing the Previous Menu key on the front panel exits the Single Graph menu and
returns to Main Menu 2.
When Main Menu 2 is displayed, pressing a key adjacent to the Double Graph item
accesses the Double Graph menu, which is shown in figure 5-37.
keys are used to adjust the upper and lower
and Stop
keys and the
and
cursor-movement keys move
keys (or the
and
keys.
keys)
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