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
16
LDX-3500 Series
C H A P T E R
2
compliance limit. If this occurs, the impedance of the output load is too high and
may cause the output to shut off if the output current is increased.
On the LDX-3565, the OPEN/V LIM indicator also becomes lit whenever the
internal overheating sense circuit senses an internal overheating condition and
shuts the output off.
The I LIMIT indicator will blink at 1 Hz whenever the output current tries to exceed
the I LIMIT value. A circuit is used to sense this condition, and the actual output
current is limited to the I LIMIT value, regardless of operating mode.
The P LIMIT indicator blinks at 1 Hz whenever the output (laser) power exceeds
the P LIMIT value while in the constant P mode. This indicator is just a warning
device. There is no actual hardware limiting to a P LIMIT value. Therefore, the
user should set I LIMIT appropriately to protect the laser.
Back Panel Controls and Connections
Refer to Figure 2.2 for the following discussions of back panel controls and
connectors. There are no user serviceable parts in the instrument,including the
external fuses in the AC power entry module.
Figure 2.2
LDX-3500 Series Back Panel
35XXbp_ 1
ANALOG
OUTPUT
PHOTODIO DE
ENABLE
0
1
Photodiode Bias
Adjust
9-pin Connector
(Current Output
Photodiode Input)
Fan
(LDX-3545 and LDX-3565)
AC Power Entry
Module
Chassis Ground
Post
Laser Enable
Key Switch
Auxiliary
Photodiode Input
Analog Output
Connector
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