C O M M A N D R E F E R E N C E
Command Reference
7/01
LDC-3700 Series
75
C H A P T E R
4
CALMD = 0), depending on the mode of operation. LDC−3724B default values are 0.01 mA, 0.01
mW, or 1
µ
A. LDC−3744B default values are 0.1 mA, 0.1 mW, or 1
µ
A.
If the first optional parameter is used, but not the second, the LASER set point is incremented by a
multiple of the LAS:STEP size, without changing the LAS:STEP size. The second optional
parameter is the time, in msec, between steps.
If 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:INC 0", the command will do nothing.
The minimum time to complete one increment is about 20 msec. Therefore, values for the second
optional parameter (time between increments) have a practical minimum of 20.
Examples
"LAS:MODE:I; LAS:STEP 3; LAS:INC" −action: The laser source current set point is incremented 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:INC 3" −action: The laser source current set point is incremented
by three times the amount described in the first example.
"LAS:MODE:I; LAS:STEP 3; LAS:INC 3,5000" −action: The laser source current set point is
incremented by the amount described in the first example, three times, with 5 seconds between
incremental steps.
"LAS:STEP 1; LAS:Mode:P; Las:INC" −action: The power set point is incremented by 0.1 mW
(LDC−3744B) or 0.01 mW (LDC−3724B or LDC−3714B).
The LASer:LDI command sets the laser control current.
Parameters
An <nrf value> which represents the (laser) output current, in mA.
Notes
Set point is the same for both low and high bandwidth output modes.
Examples
"Las:LDI 400" −action: sets the laser output current to 400.00 mA.
"LAS:ldi 1000" −action: sets the laser output current to 1000.0 mA.
The LASer:LDI? query returns the value of the measured laser current.
Notes
Response is the measured laser output current, for either low or high bandwidth modes.
This measurement is updated approximately once every 600 msec.
Examples
"LAS:ldi?" −response: 30.0, means the measured laser output current is 30.0 mA.
"Laser:LDI?" −response: 100.0, means the measured laser output current is 100.0 mA.
LASer:LDI
I
LDI
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
LASer:LDI?
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
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