ILX Lightwave LDX-32420, Руководство пользователя

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C O M M A N D R E F E R E N C E
LDX-32420 Device-Dependent Command Reference
60
LDX-32420
C H A P T E R
4

The LASer:MDI command sets the value of the optical power setpoint, in µA, if the
CALMD (CAL PD) responsivity is 0.
The LASer:MDI? query returns the value of the laser photodetector current measurement
in µA.
Parameters

Amps: represents the photodiode feedback current, in µA.
Notes If the CALMD (CAL PD) parameter is not set to 0, the LAS:MDI value will not be used. In
this case, the measured MDI would be converted to MDP (P
PD
, by the CAL PD factor),
and the MDP (P
PD
) setpoint would be used.
The response is in µA. The response is valid, even when the unit is not in constant P
mode.
This measurement is updated approximately once every 600 ms.
Examples "Las:Mdi 40" - action: The LASER output is controlled so that the photodiode feedback
current remains constant at 40 µA.
"Las:Mode:MDP; Las:Calmd 0; Las:MDi?" - response: 100.0, means 100 µA of
photodetector current. This feedback is controlling the laser current output.
The LASer:MDP command sets the value of the optical power setpoint in W if the
CALMD (CAL PD) responsivity is greater than 0.
The LASer:MDP? query returns the value of the laser photodetector power measurement
in W.
Parameters Watts: represents the photodiode feedback power in W.
Notes If the CALMD (CAL PD) parameter is set to 0, the LAS:MDP value will not be used. In
this case, the measured MDP would be invalid, and the MDI (I
PD
) setpoint would be used.
The response is in W. The response is valid, even when the unit is not in constant P
mode. This measurement is updated approximately once every 600 ms.
Examples "Las:Mdp 40" - action: The LASER output is controlled so that the photodiode feedback
power remains constant at 40 W.
"Las:Mode:MDP; Las:Calmd 46; Las:MDp?" - response: 20, means 20 W of
photodetector power. This feedback is controlling the laser current output.
The LASer:MODE? query returns the selected laser control mode.
Notes I
HBW
mode is the same as I mode (low bandwidth), except that the output low bandpass
filter is disabled in I
HBW
mode.
Examples "LAS:MODE?" - response: ILBW, means that constant I (current) mode is in effect for
the laser output.
LASer:MDI <

Amps>
LASer:MDI?
F
RONT
P
ANEL
R
EMOTE
LASer:MDP <Watts>
LASer:MDP?
F
RONT
P
ANEL
R
EMOTE
LASer:MODE?
F
RONT
P
ANEL
R
EMOTE