O P E R A T I O N
Installation
01_04
LDX-3412
11
C H A P T E R
2
output current to the laser.
7
Switch the OUTPUT on (LED lit), and adjust the current to the desired DC level using the
main current setting knob.
Note: If there is no output current at this point, check to be sure that the proper interlock
connections have been made. If the interlock is enabled, Pins 1 and 2 of J105 must be
electrically connected before output current will flow.
In order to find the proper photodiode feedback gain for your laser (in CONST P mode), it
will be necessary to follow these additional steps:
8
With the output on, slowly turn the FINE control clockwise (CW) until the proper feedback
is reached. Turning the GAIN controls clockwise (CW) will increase the output current. If
the FINE control is turned fully clockwise but the proper gain has not been reached,
continue with Step 9.
9
Reset the FINE control to its fully counter-clockwise (CCW) position. Next, slowly turn the
COARSE control clockwise (CW) about 1/4 turn. If the LIMIT LED becomes lit, turn the
COARSE control back down (CCW) a bit. Then repeat Steps 8 and 9 as necessary.
Note: At any time during the operation of the LDX-3412, the output current limit setting
may be observed by selecting LIMIT DISPLAY mode. In this mode, the output current will
be off and the current limit setting will be displayed on the LED display.
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