ILX Lightwave LDC-3700C Series, User Manual, Page: 39 / 176

O P E R A T I O N S
Operating from the Front Panel
04_09 LDC-3700C Series
23
C H A P T E R
2

circuitry is fully independent of the main current control, the current limit can be
adjusted safely, even while the LASER output is active.
Set Compliance Voltage Limit
A new feature of the 3700C Series instruments is an adjustable voltage limit. This
allows an extra level of laser protection in the event of an intermittent open circuit.
For maximum protection via the fastest open-circuit detection, the voltage limit
should be set to a value slightly greater than the intended operating voltage.
To set the LASER voltage limit, use the SELECT push button in the
PARAMETER / LASER section of the front panel to select LIM I (either range) and
then press and hold the (PARAMETER) SET push button. Then press the LASER
DISPLAY V push button. The LASER display will then indicate the LASER voltage
limit setting. While holding the (PARAMETER) SET push button, adjust the
voltage limit using the adjust knob.
In the LASER MODE section of the front panel, press the push button labeled
OUTPUT . The accompanying LED labeled ON will illuminate indicating that the
laser current source's output is enabled. The instrument drives the current source
to the value set by the corresponding
LASER MODE set point. The Output switch
has a toggling action. Pressing the switch again disables the current source
output. When the LASER output is off, an internal short is placed across the
LASER output and the Output Shorted
indicator illuminates. The default condition
for the current source output is off when the instrument is first powered up.
LIM I
TE
SAVE
CONST
GAIN
LIM T
HI
TEC
LIM I
CAL PD
LIM I
LIM P
RECALL
SET
SELECT
PARAMETER
LASER
L AS E R D IS P L AY
I I
P D
P
P D
V S ET
ON
OUTPUT
I
HBW
P
I
SELECT
LASER MODE