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Chapter 5, FRONT PANEL OPERATION
5.3.30 User Settings Menu
5-48
SCALE keys
The keys to the left-hand side of the display are used to set the upper and lower
limits of the vertical axis in 1% increments, with the top and upper-middle
keys being used for the upper curve (Curve 1) and the lower-middle and bottom
keys for the lower curve (Curve 2). Pressing both sides of one of the key pairs
simultaneously automatically sets the relevant limit to match the range present in the
visible section of the displayed curve.
As in single graph mode, there is no facility for adjusting the x-axis scale, which
always shows up to 243 points. Furthermore both the upper and lower curves are
shown over the same range of points; it is not possible, for example, to show Curve 1
for data points 1 to 243 and Curve 2 for points 243 to 486.
Curve Selection keys
The keys on the top right-hand side of the display are used to select the curve to be
shown in the upper half of the display, Curve 1, from those stored in the curve
buffer. The lower-middle right-hand keys perform an equivalent function for
Curve 2, which is shown in the lower half of the display. All curves that can be
stored may be selected for display, except for EVENT, frequency, and the curve
recording instrument sensitivity settings.
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
As with the single graph mode, the bottom right-hand
cursor-movement keys control the position of the cursor. The current point number is
displayed in the bottom right-hand corner of the display and the value of the curves
at their intersection with the cursor appear above the relevant Curve 1 and Curve 2
data types. Where applicable, values are always given as a percentage of full-scale,
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.
Pressing the Previous Menu key exits the Double Graph menu and returns to Main
Menu 2.
When Main Menu 2 is displayed, pressing a key adjacent to the User Settings item
accesses the User Settings menu, which is used to save and recall up to eight
complete instrument settings from memory. This feature is particularly useful when a
number of users share an instrument since it allows each user to quickly reset the
instrument to a known setting.
When the menu is first displayed, the Memory keys on the display are not shown.
Pressing the
Save settings, Restore settings or Delete memory keys causes
Select Memory Number and the Memory keys to be displayed. For example, when
the Save settings key is pressed, the menu changes to that shown in figure 5-38.
and Stop
keys.
keys and the
and
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