O P E R A T I O N S
Operating from the Front Panel
14
LDC-3926339
C H A P T E R
2
Operating from the Front Panel
The current source in the module must be programmed before operation. If all the
modules in the mainframe are the same model, configure the control parameters
using the All Channel menu (see the LDC-3926 mainframe User’s Guide).
Alternatively, the control parameters for each individual channel can be set
independently using the laser channel setup menus, which are accessed through
the CHAN menu. Move between multiple pages of any setup menu by pushing the
up and down arrow soft keys (F3 and F4) while in the setup menu. Use the
Previous and Next keys (PREV/NEXT) to highlight different fields. Generally,
adjust the highlighted parameter value with the numeric keypad, the Adjust knob,
or the Increment and Decriment keys (INC/DEC).
Note:
The ENTER key must be pressed within three seconds of entering a numeric value
with the keypad, or the value reverts to the previous value.
Laser Current Controller Default Configuration:
•
LASER output off
•
I
SET
= 50 mA
•
I
LIM
= 150 mA
•
V
LIM
= 5.0 V
•
Constant I, low bandwidth mode
•
I
PD
Set Point = 100
µ
A
•
Modulation off
•
P
PD
Set Point = 3.0 W
•
P
LIM
= 500 mW
•
CAL PD = 0.0
µ
A/mW
•
PD Bias off
•
LASER STEP value = 0.1 mA
•
LASER Tolerance values = 10 mA, 1.0 seconds
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