ILX Lightwave LDC-3700C Series, User Manual, Page: 53 / 176

O P E R A T I O N S
Functions and Features
04_09 LDC-3700C Series
37
C H A P T E R
2

Functions and Features
This section introduces you to the LDC-3700C Controller's functions and
operating features such as event triggering, analog modulation of laser injection
current, TEC boosting and Save and Recall.
Saving and Recalling from the Front Panel
For applications where you might need to alternate between particular instrument
configurations, the LDC-3700C Controllers offer a unique SAVE AND RECALL
feature. The SAVE feature allows you to easily store all front panel settings for
any given instrument configuration. These settings, which are stored in one of ten
memory bins, can be retrieved at any time with the RECALL function. This saves
setup time, and it reduces the chance of setup error for tests which are
periodically repeated. For example, using the configuration described in Chapter
2 where the controller is operating in Constant Current and Temperature modes,
the instrument parameters saved by using the SAVE function would be Constant
Current Mode, 200 mA range, a limit set point of 175 mA, a laser current set point
of 150 mA, Display Mode I, Constant Temperature mode, thermistor constants C1,
C2, and C3, a temperature set point of 35°C, a loop gain of 30, temperature limit
of 40°C, and a TE current limit of 2 A. Once this set up is saved, the LDC-3700C
Controller may be configured for another unique set up. You can recall the original
set up for the first experiment any time using the RECALL function.
To enter the SAVE / RECALL mode, first exit both TEC and LASER modes (both
TEC and LAS indicators in the ADJUST section off). Press the SELECT switch in
the PARAMETER section. The SAVE indicator LED becomes lit and the unit
displays the SAVE "bin" on the TEC display. If another bin number is desired,
press the SET switch and rotate the ADJUST knob until the desired bin number is
displayed. Releasing the SET switch completes the SAVE operation and all of the
instrument parameters are saved to the indicated bin number as they appear on
the front panel.
To recall a previously saved instrument set up, press the SELECT switch until the
RECALL indicator led becomes lit. The instrument will display a RECALL "bin"
number on the TEC display. If you desire to change the RECALL bin, press the
SET switch and rotate the ADJUST knob until the desired bin number is
displayed. Releasing the SET switch completes the RECALL operation. The
LIM I
TE
SAVE
CONST
GAIN
LIM T
HI
TEC
LIM I
CAL PD
LIM I
LIM P
RECALL SET
SELECT
PARAMETER
LASER