Lightwave Communications LDX-3232 Manuel d'utilisateur télécharger pdf (Page 86)

COMMAND REFERENCE

LDX-3232 Device-Dependent Command Reference

70 LDX-3232

CHAPTER 4

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The LASer:MDP command sets the value of the optical power setpoint in mW if the

CALMD (CAL PD) responsivity is greater than 0.

Syntax Diagram

Parameters An <nrf value> that represents the photodiode feedback power in mW.

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

) setpoint would be used.

Examples "Las:Mdp 40" -action: The LASER output is controlled so that the photodiode feedback

power remains constant at 40 mW.

"Laser:MDP 200" -action: The LASER output is controlled so that the photodiode

feedback power remains constant at 200 mW.

The LASer:MDP? query returns the value of the laser photodetector power measurement

in mW.

- where the response is the most recent LASER power measurement.

Notes The response is in mW. 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:Mode:MDP; Las:Calmd 460; Las:MDp?" -response: 100.0, means 100 mW of

photodetector power. This feedback is controlling the laser current output.

"LAS:MODE:IHBW; LAS:MDP?" -response: 20.0, means 20 mW of photodetector

power, but photodiode monitor current is not controlling the laser output current.

LASer:MDP

FRONT PANEL

REMOTE

LASer:MDP?

FRONT PANEL

REMOTE

<white

space>

<nrf

value>

MDP

LAS

MDP

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Lightwave Communications LDX-3232 Manuel d'utilisateur Page 86