ILX Lightwave LDC-3700B Series - Page 82

COMMAND REFERENCE
Command Reference
7/01 LDC-3700 Series 67
CHAPTER 4
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The LASer:DEC command decrements the selected laser control mode set point by one or more
steps. Optional parameters allow multiple steps to be decremented and the time (in milliseconds)
between decrements to be set, respectively.
Parameters 0, 1, or 2. The first optional parameter is the number of steps, and the second optional parameter is
the number of milliseconds between steps.
Notes The decremental default amount is one step. The step size can be edited via the LAS:STEP
command. LDC−3714B default values are 0.001/0.002 mA (50/100 mA range), 0.01 mW, or 1 µA (if
CALMD = 0), depending on the mode of operation. LDC−3724B default values are 0.01 mA, 0.01
mW, or 1 µA. LDC−3744B default values are 0.1 mA, 0.1 mW, or 1 µA.
If the first optional parameter is used, but not the second, the user may decrement the LASER set
point by a multiple of the LAS:STEP size, without changing the LAS:STEP size.
If the both optional parameters are used, the user may create an automated stepping ramp function
for the LASER output.
If the first optional parameter is entered as zero, "LAS:DEC 0", the command will do nothing.
The minimum time to complete one decrement is about 20 msec. Therefore, values for the second
optional parameter (time between decrements) have a practical minimum of 20.
Examples "LAS:MODE:I; LAS:STEP 3; LAS:DEC" −action: The laser source current set point is decremented
by 0.3 mA (LDC−3744B), or 0.03 mA (LDC−3724B), or 0.003 mA (LDC−3714B on 50 mA range), or
0.006 mA (LDC−3714B on 100 mA range).
"LAS:MODE:I; LAS:STEP 3; LAS:DEC 3" −action: The laser source current set point is
decremented by three times the amount described in the first example.
"LAS:MODE:I; LAS:STEP 3; LAS:DEC 3,5000" −action: The laser source current set point is
decremented by the amount described in the first example, three times, with 5 seconds between
decremental steps.
The LASer:DISplay command enables or disables (turns off) the LASER display and LASER
section’s indicator LEDs.SYNTAX DIAGRAM
Parameters An <nrf value>;−where 1 = on, 0 = off.
Notes Turning the LASER display and LEDs off means that a message of all blank spaces is sent to the
LASER display, and all of the LASER section’s indicator LEDs will be turned off.
Examples "las:dis 1" −action: turns the LASER display on and enables the LASER indicator LEDs.
"Laser:dis Off" −action: turns the LASER display and disables the LASER indicator LEDs.
The LASer:DISplay? query returns the value shown on the LASER display.
Notes Returns the actual (6−character) string from the output buffer to the LASER display. If the display is
disabled, it returns " .".
Examples "LAS:DIS?" −response: "− 99.9", means the LASER display shows " 99.9".
"Laser:DISp?" −response: " 0.6", means the LASER display shows " 0.6".
LASer:DEC <nrf value>,<nrf value>
COMMON
DEVICE DEPENDENT
FRONT PANEL
LASer:DISplay <nrf value>
COMMON
DEVICE DEPENDENT
FRONT PANEL
LASer:DISplay?
COMMON
DEVICE DEPENDENT
FRONT PANEL
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