I N S T A L L A T I O N A N D O P E R A T I O N
Introduction to the LDX-3500 Series Front Panel
3_03
LDX-3500 Series
19
C H A P T E R
2
Figure 2.6
Common Laser Anode - Photodiode Cathode
Figure 2.7
Common Laser Anode - Photodiode Anode
The cable connections to the laser must be secure enough that they won’t open-circuit,
should they be jostled or bumped. Should an open circuit occur during laser operation,
the LASER output will be turned off (ON LED unlit) automatically.
Experience indicates that should an open circuit occur during laser operation (while the
LASER is on, the lasr may be damaged by a momentary circuit break-and-remake before
the final circuit break. Therefore, although the LDX-3500 Series Precision Current Source
provides a proprietary debounce protection circuit for LASER output, secure cabling is
important.
It is recommended that the connections to the LDX-3500 Series Precision Current
Source output be made using twisted wire pairs with an earth-grounded shield
(see Figures 2.4 - 2.7). The output terminals of the unit are left floating relative to
earth ground to suppress AC power-on/power-off transients that may occur
+
-
+
Bias
OUTPUT
7
6
8, 9
4, 5
3
P. D.
L. D.
Earth Ground
3500 Series Precision Current Source
+
-
+
Bias
OUTPUT
7
6
8, 9
4, 5
3
P. D.
L. D.
Earth Ground
3500 Series Precision Current Source
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