The lower center soft key controls the display inversion. Inverting the
display causes the letters to appear white, with a blue background,
instead of blue against a white background.
The upper right and lower right sections of the display, and the upper
right and lower right soft keys, control the step sizes used by the
FREQUENCY and AMPLITUDE INC and DEC keys.
Screen Saver
In order to extend the useful lifetime of the fluorescent backlighting of
the screen, the backlight is turned off whenever two hours pass without
any button being pressed.
To turn the backlight on again, press any key. The backlight will be
turned back on, and the normal function of that button will not be
executed.
For situations where the two hour time period is insufficient, the ATS-1
Dual Domain has an eight hour screen saver mode. This mode is
entered by pressing the BARGRAPH key and RECALL/SAVE key
simultaneously. The display will go dark to acknowledge that eight
hour mode has been invoked, and another keypress will be required to
turn the backlight back on.
If one key is released before the other, the display will relight, but eight
hour mode will still be invoked.
Turning power off and back on will return the unit to the normal two
hour screen saver.
3 Operation
Operational Overview Screen Saver
ATS-1 Dual Domain User's Manual 3-11
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