LASerLDV?, Las Ldv | Lightwave Communications LDX-3232 guide

COMMAND REFERENCE

LDX-3232 Device-Dependent Command Reference

C H A P T E R 4

LASer:LDV	FRONT PANEL
	FRONT PANEL
	REMOTE

The LASer:LDV command sets the laser voltage for calibration of the laser voltage measurement.

Syntax Diagram

:

LAS

:

LDV

<white

space>

<nrf

value>

Parameters	An <nrf value> that represents the (laser) output voltage, in volts.
Notes	setpoint is the same for both low and high bandwidth output modes and is entered only
	for LDV calibration.
Examples	"Las:LDV 4" -action: enters a value of 4.000 V.
	"LAS:ldv 1.025" -action: enters a value of 1.025 V.

LASer:LDV?	FRONT PANEL
	FRONT PANEL
	REMOTE

The LASer:LDV? query returns the value of the measured laser voltage. Syntax Diagram

	:	LAS	:	LDV	?
	- where the response is the measured laser output voltage for either low or high
	bandwidth modes.
Notes	This measurement is updated approximately once every 600 ms.
Examples	"LAS:ldv?"	-response: 3.03, means the measured laser output voltage is 3.03 V.

"Laser:LDV?" -response: 1.0, means the measured laser output voltage is 1.000 V.

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LDX-3232

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Image 79

Lightwave Communications LDX-3232 manual LASerLDV?, For LDV calibration, Las Ldv

Contents

User’s Guide Page Table of Contents Remote Operation Command Reference Iv LDX-3232 List of Figures Vi LDX-3232 List of Tables Viii LDX-3232 General Safety Considerations Safety Information and the Manual Safety Marking Symbols Safety Symbols Warranty Claims for Shipping Damage Description of the problem Comments, Suggestions, and ProblemsModel Number Serial Number End-User Name Company Phone Fax Xiv LDX-3232 Product Overview Introduction and Specifications Grounding Requirements Installing Your LDX-3232 High Compliance Current SourceAC Line Power Requirements Initial Inspection Operating the LDX-3232 Precision Current Source Gpib ConnectorTilt-Foot Adjustment Gpib Address LDX-3232 Front View Maintenance Specifications TTL Type Pulse Width Delay13 µs 12 ms Description Model Number Available Options and Accessories Power On Sequence Applying Power to Your LDX-3232 Power On State Connecting to the Laser Common Laser Cathode Photodiode Anode Interlock Connections Back Panel LD Connector Photodiode Connections Setting the PD BiasGrounding Considerations Front Panel Operation Operating a Laser in Constant Current I ModeDisplay Setting Up the Precision Current Source E R a T I O N Entering Photodiode Responsivity Values Operating a Laser in Constant Power P Mode Method to calculate the responsivity is suggested below LDX-3232 Error Indicators Error Indicators Error Indicators LDX-3232 Changing the Gpib Address Reading the Gpib Address Command Syntax LDX-3232 Current Source Command SetChanging Operation from Local to Remote OFF OLD NEW True False SET Reset LASLDI? LDX-3232 Command Path Structure Command Paths IEEE488.2 Command Commands None LDX-3232 Frequently Used CommandsLIM Event and Condition Registers Status ReportingOperation Complete Definition LDX-3232 Status Reporting Schematic Diagram Output Off Register Disabled 10 N/A Enabled 11 N/A 12 N/A 13 N/A 14 N/A 15 N/A LASerENABleOUTOFF nrf LASerENABleOUTOFF? Error Messages Command Timing and Completion Response Message Error Code Classifications Mode Used to enter the laser voltage calibration mode Used to create a delay in the execution of furtherCommands Used to enter the laser current calibration mode Returns the value of the LAS conditions enable register Returns status of photodiode monitor power displayEnables Laser display to show parameter values Sets the enable register for Laser conditions Or P optical power Used to return the optical power from monitorUsed to set the constant optical power setpoint, if Used to enable/disable the front panel modulation input Used to return the Laser setpoint tolerance value Returns the status of the Term commandPowered up Returns the elapsed time since the timer was last reset Command Description Format LDX-3232 Device-Dependent Commands Delay LDX-3232 Device-Dependent Command Reference LASerCALMD ERRors?Calmd LAS Calpd LASerCALMD? Responsivity CAL PD parameter setting Syntax Diagram LASerCALLDI Selected. This procedure is outlined in ChapterCalibration for that bandwidth LAS CAL LDV LASerCALLDI?LASerCALLDV LDI LAS CAL LASerCALLDV? True measured value. This procedure is outlined in ChapterLASerCALMDI LAS CAL IPD LASerCALMDI?LASerCOND? MDI LASerDEC LASDIS? LASerDISplayLASerDISplay? LAS DIS LDI LASerDISplayLDILASerDISplayLDI? Lasdisldi LASDISLDV? Voltage measurement Syntax DiagramLASerDISplayLDV LASerDISplayLDV? LAS DIS IPD LASerDISplayMDILASerDISplayMDI? LAS DIS MDI LAS DIS MDP LASerDISplayMDPLASerDISplayMDP? PPD LAS DIS SET LASerDISplayPARAMLASerDISplaySET LAS DIS Param LASerDISplaySET? LASerENABleCONDLASDISPLAYSET? Bit LASerENABleCOND?LAS Enab Cond Lasenabevent LASerENABleEVEntAn nrf value whose sum represents the bits that are enabled Action enables the Laser status event register so that LAS Enab EVE LASerENABleEVEnt? LASerENABleOUTOFF LAS Enab Outoff LASerENABleOUTOFF? LAS EVE LASerENABleEVEnt commandCommand while the condition status is constantly changing LASerEVEnt? Function for the Laser output LASerINC LAS LDI This measurement is updated approximately once every 600 msLASerLDI LASerLDI? LAS LDV LASerLDVLASerLDV? For LDV calibration LAS LIM LASerLIMitI2LASerLIMitI2? Limit in use depends on the Laser output range selection LASLIMI4? Displayed, and then releasing the SET switchLASerLIMitI4 LASerLIMitI4? LASerLIMitMDP? LASerLIMitMDPMDP LAS LIM LASerLIMitV? LASerLIMitV MDP P PD setpoint would be used LASerMDILASerMDI? MDI LAS IPD LASerMDLN? LASerMDLNLAS Mdln LASerMDP? LASerMDPMDP LAS LASerMODEIHBW LAS ModeLAS Mode Ihbw LASerMODE? Lasmodeilbw LAS Mode MDPLASerMODEILBW LASerMODEMDP LASerOUTput? LASerOUTputLAS OUT LASRAN? LASerRANgeLASerRANge? LAS RAN LASerSETMDI? Where the response is the constant I setpoint value, in mA30 µA, for use in constant P mode with Calpd = LASerSETLDI? 100 µA Where the response is the constand PPD setpoint, in mWLASerSETMDP? LASerSTEP LAS TOL LASerTOLerance commandLASerSTEP? LASerTOLerance MES LASerTOLerance?MESsage Second is the time window, in seconds RADix MESsage? Means hexadecimal, and OCT means octal Term 0 command is sent or the LDX-3232 is powered offRADix? RAD Time clock is independent of the Timer clock LDX-3232 was last powered upTime Seconds since the last TIMER? query was issued Since the last TIMER? query was issuedTimer Last TIMER? query is returned Saving and Recalling from the Front Panel Functions and Features Saving and Recalling Under Remote Operation Using the Laser Compliance Voltage Adjustment LDX-3232 Rear Panel Using the LDX-3232 Current Source’s Trigger Function BNC Interlock Usage Example Modulating the Laser Current Source Modulating the Laser Current Source Functions and Features Calibration Overview Calibration and Troubleshooting Recommended Equipment Description Manufacturer/Model SpecificationDMM Current Limit Local Calibration of the LDX-3232 Current SourceCurrent Source Calibration Range IPD Current Calibration IPD Setpoint Constant powerCAL PD Set equal to zero Set to FS full scale of range Laser ModeLaser Forward Voltage Measurement Calibration 2000 mA Remote Calibration of the LDX-3232 Current Source Gpib CommandLimit Lasldi nrf value command IPD Setpoint Function State Gpib Command Current source must be recalibrated Troubleshooting GuideGeneral EEPROM, Lllll will be displayed on the display the laser Command Feature can be defeated via the Lasenableoutoff 101 Response Message