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1257 User Manual
Troubleshooting C-2
EADS North America Defense
Test and Services, Inc.
©
2001
Front-Panel Controls
PROBLEM
POSSIBLE CAUSES
WHAT TO DO
•
Power has been
interrupted.
•
Verify that the 1257 AC input is
connected to a live mains
outlet.
•
Verify that the 1257 power
switch is still in the ON
position.
Display goes blank
(was working).
•
1257 screen saver has
been activated.
•
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 CONTROL
S,
under the Settings heading.
Note that leaving the screen
saver enabled maximizes the
life of the fluorescent display.
•
Key is not currently
enabled. Enabled keys
have their LEDs
illuminated.
•
Read display options carefully.
Not all keys are valid for all
menus.
•
1257 is in remote mode
(local mode not locked out).
•
If display reads:
*REMOTE OPERATION*
(RS-232 is active)
<Local Mode
then press key 4 (bottom) to
restore display and controls.
No response to front-panel
controls.
•
1257 is in remote mode
(local mode locked out).
•
If display reads:
*REMOTE OPERATION*
(RS-232 is active)
Local Mode Lockout
then the 1257 is in Manual
Lockout mode. To restore
controls, send a
SYST:KLOCK OFF
command
to the 1257 via remote
interface.