ILX Lightwave LDX-36000 Series User Manual page 101

LASer:DEC <nrf value,<nrf value>
Action
Parameters
Notes
Examples
03_10
Decrements the output current by one or more steps based on the control mode.
Parameters allow multiple steps to be decremented and the time (in milliseconds)
between decrements to be set, respectively.
Zero, one, or two <nrf values>, representing the number of steps and the number of
milliseconds between steps, respectively.
The decremental 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:DEC 0", the command will be
ignored.
The minimum time to complete one decrement is approximately 20 ms. Therefore,
values for the second optional parameter (time between decrements) have a practical
minimum of 20.
"LAS:DIS:LDI; LAS:STEP 0.3; LAS:DEC" -action: The current source setpoint is
decremented by 300 mA since the current display mode is output current.
"LAS:CALP 1.5, .75; LAS:DIS:P; LAS:STEP 0.1; LAS:DEC 5, 1500" -action: The output
is decremented 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.
C O M M A N D R E F E R E N C E
Command Reference
5
C H A P T E R
C
OMMON
F P
RONT ANEL
D D
EVICE EPENDENT
85
LDX-36000 Series
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