O P E R A T I O N S
Functions and Features
40
LDC-3700C Series
C H A P T E R
2
Set the LDC-3700C in Constant Current High Bandwidth Mode by selecting
I
HBW
in the
LASER MODE
section of the front panel. Do this by toggling the
SELECT
push button until the
I
HBW
indicator is illuminated. Repeatedly pressing the
(
LASER MODE
)
SELECT
switch cycles through the current (
I
), light power (
P
), or
high bandwidth current (
I
HBW
) control modes.
Set the laser controller's current source range by selecting the 200 mA range
indicated by the accompanying LED. You will need to press the select push
button twice to change the range. It must be pressed twice quickly (within less
than 1 second) to switch between modes, and the LASER output must be off
(LASER MODE ON indicator unlit) in order to change ranges.
The limit clamp function for DC output current applies to the modulated current as
well protecting your laser in any mode. To accomplish setting the current source
limit, use the
SELECT
push button in the
PARAMETER
/
LASER
section of the
front panel to select
LIM
I
. You will notice there are two
LIM
I
selections, one in
blue text and the other in black text. These limit selections correspond to the
current source range as indicated in the
RANGE
section. When the blue
LIM
I
is
indicated by the accompanying LED, the
LASER
display will be indicating the limit
set point in mA for the controller's low range. Press the (
PARAMETER
)
SET
push
button and rotate the adjust knob, clockwise to increase the limit set point value,
or counterclockwise to decrease the limit set point value. Set the limit to 175 mA.
Once the
SET
push button is released, the new parameter value is stored in non-
volatile memory.
When the laser current limit is reached, the
CURRENT
LIMIT
error indicator
flashes. The current limit setting is independent of the voltage drop of the device
ON
OUTPUT
I
HBW
P
I
SELECT
LASER MODE
PRESS TW ICE
2 0 0 m A
5 0 0 m A
RANGE
LIM I
TE
SAVE
CONST
GAIN
LIM T
HI
TEC
LIM I
CAL PD
LIM I
LIM P
RECALL
SET
SELECT
PARAMETER
LASER
Summary of Contents for LDC-3700C Series
Page 2: ......
Page 8: ...L I S T O F FIG U R E S vi LDC 3700C Series...
Page 10: ...L I S T O F TA B L E S viii LDC 3700C Series...
Page 78: ...RE M O T E O PE R A T I ON Command Syntax 62 LDC 3700C Series C H A P T E R 3...
Page 150: ...C O M M A N D RE F E R E N C E Command Reference 134 LDC 3700C Series C H A P T E R 4...