ILX Lightwave LDX-36000 Series User Manual page 118

5
C H A P T E R
LASer:INC <nrf value>,<nrf value>
Action
Parameters
Notes
Examples
LASer:IPD?
Action
Parameters
Notes
Examples
102
 LDX-36000 Series
C O M M A N D R E F E R E N C E
Command Reference
Increments the currently selected control mode setpoint by one or more steps. Optional
parameters allow multiple steps to be incremented and the time (in milliseconds)
between increments to be set, respectively.
Zero, one or two <nrf values> specifying the number of steps, and the number of
milliseconds between steps, respectively.
The incremental default amount is one step. The step size can be edited via the
LAS:STEP command. The LDX-36000 default step value is 100 mA when displaying
output current and 100 mW when displaying output power. A valid laser threshold and
slope efficiency value must be entered before variations based on power are allowed.
If the first optional parameter is used, but not the second, the user may decrement the
current setpoint by a multiple of the LAS:STEP size, without changing the LAS:STEP
size.
If both optional parameters are used, the user may create an automated stepping ramp
function for the current output.
Each time the output current is varied, an trigger pulse will be output corresponding to
the change in current.
If the first optional parameter is entered as zero, "LAS:INC 0", the command will be
ignored.
The minimum time to complete one increment is approximately 20 ms. Therefore, values
for the second optional parameter (time between increments) have a practical minimum
of 20.
"LAS:DIS:LDI; LAS:STEP 0.3; LAS:INC" -action: The current source setpoint is
incremented by 300 mA since the current display mode is output current.
"LAS:CALP 1.5, .75; LAS:DIS:P; LAS:STEP 0.1; LAS:INC 5, 1500" -action: The output
is incremented in a series of 5 100mW steps with an approximate 1.5 second delay
between each step. The actual current setpoint is varied by back-calculating from the
optical power by using the threshold and slope efficiency values entered via the
LAS:CALP command.
Returns the measured external photodiode photocurrent in amperes.
None.
The LAS:IPD? query will return the external photocurrent measurement in any case,
regardless of any photodiode responsivity value that has been entered using the
LAS:CALPD command.
"LAS:IPD?" -response: "2543", means the LDX-36000 is measuring 2.5423 mA from an
external photodiode.
"las:ipd?" -response: "14", means the LDX-36000 is measuring 14 µA from an external
photodiode.
C
OMMON
F P
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OMMON
F P
RONT ANEL
D D
EVICE EPENDENT