C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
Troubleshooting Guide
02_03
LDC-3926339
79
C H A P T E R
5
Error Codes
The LDC-3926339 indicates general operational error conditions on the display or
through the GPIB. This section contains descriptions of the errors that are specific
to the LDC-3926339 module. Refer to the LDC-3926 Manual, for a list of
mainframe error codes and descriptions.
Front panel Error Indicators
When an error occurs, the error code appears on the Status page, the Chan page,
or the respective channel's setup pages on the front panel display.
The error code clears when you exit any page where it appears. Error indicator
codes are summarized in Table 5.6. These are the only error codes that appear on
the display. See
Remote Accessible Error Codes
on page
80
for a complete list of
all possible error codes.
The output drive shuts off when any error in Table 5.6 occurs.
Table 5.6
Front Panel Error Codes
Error Condition
Explanation
E501 Interlock
Pins 1 and 2 (interlock pins) are not connected properly or the
LASER ENABLE key lock is turned off on the front panel.
E503 Voltage limit or open circuit
The laser current source pins are open, or some condition caused
the laser voltage to exceed the voltage limit (Vlim) setting.
E504 Current limit
The current limit (Ilim) was reached. This condition causes error
code E504 and shut down the source only when enabled through
the GPIB interface; otherwise, a current limit will only clip the drive
current at the Ilim value and indicate ILIM on the display.
E505 Voltage limit warning
The voltage on the laser current source is approaching the Vlim
value. This condition will cause Error Indicator Code E405 or E505
and shut down the source only when enabled through the GPIB
interface.
E507 Output power limit
Software calculated optical output power limit (Plim) was detected.
E511 Hardware error
Hardware has detected an error.
E529 Output off when controller thinks it is
on
Laser source is off without hardware or software indicating a
reason.
E535 Mode changed while output on
Operating mode was changed while the laser current source was
on.
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