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O P E R A T I O N
2
C H A P T E R
Installation
Front Panel
The LDX-3412 front panel is shown in Figure 2.1.
Power-up Sequence
With the LDX-3412 properly connected to an AC power source, pressing the AC
POWER off/on switch causes the unit to initiate its power-up sequence. During
this period the output terminals are unconditionally shorted and the OUTPUT
off/on switch is inhibited for two seconds. This is done to prevent transients from
reaching your laser diode.
Operating MODE Selection
The MODE select switch allows the user to select between the three modes of
operation by turning the MODE knob to the desired mode. CONST P selects
constant power mode for photodiode feedback control. CONST I selects constant
current mode for normal operation. LIMIT DISPLAY selects a display mode in
which the output is turned off and the current LIMIT is displayed on the LED
display. When the MODE select switch is turned between modes, the output is
turned off.
Current LIMIT Adjustment
The current LIMIT knob allows the user to set the upper limit on output current.
The user may adjust the output current from zero (LIMIT knob fully counter-
clockwise CCW) to 200 mA (LIMIT knob fully clockwise CW). This LIMIT knob is
recessed to prevent accidental readjustment of the output current during
operation.
4
LDX-3412
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Figure 2.1 LDX-3412 Front Panel
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