ILX Lightwave LDC-3700 Series User Manual

2.15 RANGE Section
The PRESS TWICE switch is pressed to switch from the Low to High Laser Drive Current range, and vice versa. 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. See Figure 2.10.
If the LASER output is on when the
(RANGE) PRESS TWICE switch is pressed, the LDC-3700 Series Laser
Diode Controller will beep to indicate that the range cannot be changed while the LASER output is on.
2.16 MOD Section
The (MOD) EXTERNAL connector (BNC) allows a modulation signal to
be applied to the laser. The bandwidth
depends on the selected current range and bandwidth mode (see specifications, Chapter
1). Bandwidth
specifications are measured across a
1 R load. The modulation port input impedance is 10 W2. he transfer
function (mAN) in Figure
2.10 is shown for the LDC-3722B. This transfer function varies by model and Laser
Drive Current Output range. The transfer function for the low and
high current ranges of the LDC-3712 and LDC-
3742B are 5 mAN and 10 mAN, and 100 mAN and 300 mAN, respectively.
RANGE MOD-
I
0 200 mA I I EXTERNAL
I
PRESS TWICE
1 J 1 : J
Figure 2.10 LDC-3700 Series MOD Sections
2.17 SAVE and RECALL Parameter Functions
The
SAVE and RECALL parameter functions are used to store and retrieve the LDC-3700 Series Laser Diode
Controller's parameter configurations for hture use. For example, a speclfic test setup may
be saved for later use
via the
SAVE function, and then another setup may be used presently. Then, when the user desires to perform the
specific test again, its setup is simply recalled via the
RECALL function. This saves setup time, and it reduces the
chance of setup error for tests which are repeated periodically.
Refer to Figure
2.8 for the discussion of the SAVE and RECALL parameters.
Non-volatile memory is used for saving the instrument parameters. When a save operation is performed, all of the
parameters which are currently in effect on the unit are stored. The user selects a "bin" number
(1 - 10) for saving
the parameters. Then, when that "bin" number is recalled, the unit is restarted and the parameters are reconfigured
to the previously stored values.
To
enter the SAVEIRECALL mode, first exit both
TEC and LASER modes. If either TEC or LASER mode is
engaged, the corresponding LED indicator will be lit in the ADJUST section of the front panel. To exit, press the
switch of the indicated (lit) mode, so that both indicators are off. Then press the SELECT switch in the
PARAMETERS section of the front panel.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

ILX Lightwave LDC-3700 Series Specifications

General

Brand	ILX Lightwave
Model	LDC-3700 Series
Category	Controller
Language	English