Lightwave Communications LDX-3232 manual RADix?, Rad, Means hexadecimal, and OCT means octal, Term

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C H A P T E R 4

COMMAND REFERENCE

LDX-3232 Device-Dependent Command Reference

"rad hex; *ESR?" -action: the hexadecimal radix is selected; -response: #H80, means power-on was detected.

RADix?					FRONT PANEL
					REMOTE

	The RADix? query allows the programmer to determine that radix type for status,
	condition, and event query response data is currently selected. Decimal, binary, octal,
	and hexadecimal are allowed.
		:	RAD	?

	- where the character response data of DEC means decimal, BIN means binary, HEX
	means hexadecimal, and OCT means octal.
Notes	DEC is the default type. The LDX-3232 defaults to this radix at power-up.
	The RADix command is used to select the desired radix. Once it is changed, the new
	radix will remain in effect until the power is shut off or a new RADix command is issued.
Examples	"RAD?"		-response: Dec, means the selected radix is decimal.

"rad?" -response: Hex, means the selected radix is hexadecimal.

"RADIX?" -response: Oct, means the selected radix is octal.

SECURE

FRONT PANEL

REMOTE

The SECURE command allows the service technician access to the protected user data command, *PUD, that is a common command. This data is normally changed only at the factor, and therefore the SECURE command is not needed by the user.

TERM

FRONT PANEL

REMOTE

The TERM command allows the programmer to change the default (GPIB/IEEE488 standard) terminator to include the carriage return.

:TERM

<white

space>

<nrf

value>

Parameters	An <nrf value>, 0=FALSE, non-zero=TRUE
Notes	An altered terminator will be in the form <CR><NL><^END>. This technically takes the
	LDX-3232 out of GPIB/IEEE488 specification, but may be done for convenience when
	using non standard GPIB controllers. This termination will be sent with all output until the
	"TERM 0" command is sent or the LDX-3232 is powered off.
Examples	"Term 1" -temporarily sets <CR><NL><^END> as the output terminator.
	"Term 0" -sets the GPIB/IEEE488 standard <NL><^END>terminator. This is the
	LDX-3232 default value.

80 LDX-3232

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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 Safety Information and the Manual General Safety ConsiderationsSafety Symbols Safety Marking SymbolsWarranty Claims for Shipping Damage Comments, Suggestions, and Problems Description of the problemModel Number Serial Number End-User Name Company Phone Fax Xiv LDX-3232 Introduction and Specifications Product OverviewInstalling Your LDX-3232 High Compliance Current Source AC Line Power RequirementsInitial Inspection Grounding RequirementsGpib Connector Tilt-Foot AdjustmentGpib Address Operating the LDX-3232 Precision Current SourceLDX-3232 Front View Maintenance Specifications Type Pulse Width Delay TTL13 µs 12 ms Available Options and Accessories Description Model NumberApplying Power to Your LDX-3232 Power On SequenceConnecting to the Laser Power On StateCommon Laser Cathode Photodiode Anode Back Panel LD Connector Interlock ConnectionsSetting the PD Bias Photodiode ConnectionsGrounding Considerations Operating a Laser in Constant Current I Mode Front Panel OperationDisplay Setting Up the Precision Current Source E R a T I O N Operating a Laser in Constant Power P Mode Entering Photodiode Responsivity ValuesMethod to calculate the responsivity is suggested below Error Indicators LDX-3232 Error IndicatorsError Indicators LDX-3232 Reading the Gpib Address Changing the Gpib AddressLDX-3232 Current Source Command Set Command SyntaxChanging Operation from Local to Remote OFF OLD NEW True False SET Reset LASLDI? Command Paths LDX-3232 Command Path StructureIEEE488.2 Command Commands LDX-3232 Frequently Used Commands NoneLIM Status Reporting Event and Condition RegistersOperation Complete Definition LDX-3232 Status Reporting Schematic Diagram Disabled 10 N/A Enabled 11 N/A 12 N/A 13 N/A 14 N/A 15 N/A Output Off RegisterLASerENABleOUTOFF nrf LASerENABleOUTOFF? Command Timing and Completion Error MessagesError Code Classifications Response MessageMode Used to create a delay in the execution of further CommandsUsed to enter the laser current calibration mode Used to enter the laser voltage calibration modeReturns status of photodiode monitor power display Enables Laser display to show parameter valuesSets the enable register for Laser conditions Returns the value of the LAS conditions enable registerUsed to return the optical power from monitor Used to set the constant optical power setpoint, ifUsed to enable/disable the front panel modulation input Or P optical powerReturns the status of the Term command Powered upReturns the elapsed time since the timer was last reset Used to return the Laser setpoint tolerance valueLDX-3232 Device-Dependent Commands Command Description FormatLDX-3232 Device-Dependent Command Reference DelayERRors? LASerCALMDCalmd LAS Calpd Responsivity CAL PD parameter setting Syntax Diagram LASerCALMD?Selected. This procedure is outlined in Chapter LASerCALLDICalibration for that bandwidth LASerCALLDI? LASerCALLDVLDI LAS CAL LAS CAL LDVTrue measured value. This procedure is outlined in Chapter LASerCALLDV?LASerCALMDI LASerCALMDI? LASerCOND?MDI LAS CAL IPDLASerDEC LASerDISplay LASerDISplay?LAS DIS LASDIS?LASerDISplayLDI LASerDISplayLDI?Lasdisldi LDIVoltage measurement Syntax Diagram LASerDISplayLDVLASerDISplayLDV? LASDISLDV?LASerDISplayMDI LASerDISplayMDI?LAS DIS MDI LAS DIS IPDLASerDISplayMDP LASerDISplayMDP?PPD LAS DIS MDPLASerDISplayPARAM LASerDISplaySETLAS DIS Param LAS DIS SETLASerENABleCOND LASerDISplaySET?LASDISPLAYSET? LASerENABleCOND? BitLAS Enab Cond LASerENABleEVEnt An nrf value whose sum represents the bits that are enabledAction enables the Laser status event register so that LasenabeventLASerENABleEVEnt? LAS Enab EVELASerENABleOUTOFF LASerENABleOUTOFF? LAS Enab OutoffLASerENABleEVEnt command Command while the condition status is constantly changingLASerEVEnt? LAS EVELASerINC Function for the Laser outputThis measurement is updated approximately once every 600 ms LASerLDILASerLDI? LAS LDILASerLDV LASerLDV?For LDV calibration LAS LDVLASerLIMitI2 LASerLIMitI2?Limit in use depends on the Laser output range selection LAS LIMDisplayed, and then releasing the SET switch LASerLIMitI4LASerLIMitI4? LASLIMI4?LASerLIMitMDP LASerLIMitMDP?MDP LAS LIM LASerLIMitV LASerLIMitV?LASerMDI LASerMDI?MDI LAS IPD MDP P PD setpoint would be usedLASerMDLN LASerMDLN?LAS Mdln LASerMDP LASerMDP?MDP LAS LAS Mode LAS Mode IhbwLASerMODE? LASerMODEIHBWLAS Mode MDP LASerMODEILBWLASerMODEMDP LasmodeilbwLASerOUTput LASerOUTput?LAS OUT LASerRANge LASerRANge?LAS RAN LASRAN?Where the response is the constant I setpoint value, in mA 30 µA, for use in constant P mode with Calpd =LASerSETLDI? LASerSETMDI?Where the response is the constand PPD setpoint, in mW LASerSETMDP?LASerSTEP 100 µALASerTOLerance command LASerSTEP?LASerTOLerance LAS TOLLASerTOLerance? MESsageSecond is the time window, in seconds MESMESsage? RADixTerm 0 command is sent or the LDX-3232 is powered off RADix?RAD Means hexadecimal, and OCT means octalLDX-3232 was last powered up Time clock is independent of the Timer clockTime Since the last TIMER? query was issued TimerLast TIMER? query is returned Seconds since the last TIMER? query was issuedFunctions and Features Saving and Recalling from the Front PanelUsing the Laser Compliance Voltage Adjustment Saving and Recalling Under Remote OperationUsing the LDX-3232 Current Source’s Trigger Function LDX-3232 Rear PanelModulating the Laser Current Source BNC Interlock Usage ExampleModulating the Laser Current Source Functions and Features Calibration and Troubleshooting Calibration OverviewDescription Manufacturer/Model Specification Recommended EquipmentDMM Local Calibration of the LDX-3232 Current Source Current Source CalibrationRange Current LimitIPD Current Calibration Constant power CAL PDSet equal to zero IPD SetpointLaser Mode Laser Forward Voltage Measurement Calibration2000 mA Set to FS full scale of rangeGpib Command Remote Calibration of the LDX-3232 Current SourceLimit Lasldi nrf value command IPD Setpoint Function State Gpib Command Troubleshooting Guide GeneralEEPROM, Lllll will be displayed on the display the laser Current source must be recalibratedFeature can be defeated via the Lasenableoutoff Command101 Response Message