Laser:step, Laser:tolerance – Lightwave Communications LDX-3232 User Manual
Page 93
C O M M A N D R E F E R E N C E
LDX-3232 Device-Dependent Command Reference
04_06
LDX-3232
77
C H A P T E R
4
The LASer:STEP? query is used to read back the LASer STEP value. This value is used
to increment or decrement the selected laser control mode setpoint by the given amount
when used with the LASer:INC or LASer:DEC command.
- where the response is an integer value.
Examples
"Las:Mode:LDI; Las:Step?" -response: 1 means the step size is 0.1 mA, since Const I
mode is in effect.
"LAS:MODE:MDP; LAS:CALMD 1; LAS:STEP?" -response: 10 means the step size is
1.0 mW, since Const P mode is in effect.
The LASer:TOLerance command allows the programmer to determine the LASER
current tolerance and time window for it to occur, in order that the operation complete flag
be set after a "LASer:OUTput 1" command is issued or the LASER setpoint is changed.
Parameters
Two
0.1 to 100.0 mA; and the second represents the time window, in seconds, with a range of
0.001 to 50.000 seconds.
Notes
The LDX-3232 defaults to a tolerance of 1.0 mA for three seconds, unless changed by
the LASer:TOLerance command.
If the LDX-3232 is operated in P mode, the current tolerance parameter is not used.
Instead a fixed value of 50 µA is used for the I
PD
current. A fixed value of 1 mW is used for
P
PD
power, and only the time window parameter may be adjusted.
Note: If the tolerance is set too tight it may never be achieved. This is due to the calibration
of the setpoint and measurement values.
Examples
"Las:Tol 0.5,10" -action: the LDX-3232's LASER current source will be in tolerance when
the LASER current is within 0.5 mA for 10.000 seconds.
LASer:STEP?
F
RONT
P
ANEL
R
EMOTE
LASer:TOLerance
F
RONT
P
ANEL
R
EMOTE
:
LAS
:
?
STEP
LAS
space> TOL : : , value> value>