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Front-Panel Controls
PROBLEM
Display goes blank
(was working).
No response to front-panel
controls.
Appendix C-2
POSSIBLE CAUSES
•
Power has been
interrupted.
•
1256 screen saver has
been activated.
•
Key is not currently
enabled. Enabled keys
have their LEDs
illuminated.
•
1256 is in Automatic Local
lockout mode.
•
1256 is in Manual Lockout
mode.
1256 User Manual
WHAT TO DO
•
Verify that the 1256 AC input is
connected to a live mains
outlet.
•
Verify that the 1256 power
switch is still in the ON
position.
•
Screen saver activation is
normal after a period of no
front-panel control activity. To
restore the display, press any
key on the front panel.
•
To increase the delay time, or
disable the screen saver, refer
to Chapter 3: USING THE
FRONT-PANEL CONTROLS,
under the Settings heading.
Note that leaving the screen
saver enabled maximizes the
life of the fluorescent display.
•
Read display options carefully.
Not all keys are valid for all
menus.
•
If display reads:
*REMOTE OPERATION*
(RS-232 is active)
<Local Mode
then press key 4 (bottom) to
restore display and controls.
•
If display reads:
*REMOTE OPERATION*
(RS-232 is active)
Local Mode Lockout
then the 1256 is in Manual
Lockout mode. To restore
controls, send a
SYST:KLOCK OFF command
to the 1256 via remote
interface.
Racal Instruments © 2002
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