Newport LDX-3232 User manual

User’s Guide

High Compliance Current Source

LDX-3232

70037802 November 2017

November 2017 1 70037802 LDX-3232 Manual

09-FM030

1/30/13

Rev. 01

Table of Contents

Safety and Warranty Information .......................................................................... 5

Chapter 1 : Introduction and Specifications .......................................................... 9

Product Overview ................................................................................................................. 9

Initial Inspection ............................................................................................................................ 9

Installing the LDX-3232 High Compliance Current Source ................................................. 10

Grounding Requirements............................................................................................................ 10

AC Line Power Requirements .................................................................................................... 10

GPIB Connector.......................................................................................................................... 10

The GPIB Address...................................................................................................................... 10

Tilt-Foot Adjustment.................................................................................................................... 10

Operating the LDX-3232 Precision Current Source ............................................................ 11

Specifications...................................................................................................................... 12

Available Options and Accessories ............................................................................................ 14

Chapter 2 : Operation ......................................................................................... 15

Applying Power to the LDX-3232........................................................................................ 15

The Power On Sequence ........................................................................................................... 15

Connecting to the Laser...................................................................................................... 15

Interlock Connections ................................................................................................................. 17

Photodiode Connections............................................................................................................. 17

Setting the PD Bias..................................................................................................................... 18

Grounding Considerations .......................................................................................................... 18

Front Panel Operation ........................................................................................................ 18

The Display................................................................................................................................. 18

Setting Up the LDX-3232 Precision Current Source ........................................................... 19

Mode Selection ........................................................................................................................... 19

Range Selection ......................................................................................................................... 19

Display Selection ........................................................................................................................ 19

Adjust Knob ................................................................................................................................ 19

Parameter Selection ................................................................................................................... 20

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Using the LDX-3232 in Constant Power (P) Mode ..................................................................... 20

Error Indicators ........................................................................................................................... 20

Automatic Laser Output Shut Off Conditions.............................................................................. 21

Chapter 3 : Remote Operation............................................................................ 23

Reading the GPIB Address......................................................................................................... 23

Changing the GPIB Address....................................................................................................... 23

Changing Operation from Local to Remote ................................................................................ 23

LDX-3232 Current Source Command Set .......................................................................... 24

Command Syntax ....................................................................................................................... 24

Command Paths ......................................................................................................................... 26

IEEE488.2 Command Commands...................................................................................... 27

Status Reporting ................................................................................................................. 28

Event and Condition Registers ................................................................................................... 28

Operation Complete Definition.................................................................................................... 29

Output Off Register..................................................................................................................... 30

Command Timing and Completion ............................................................................................. 30

Error Messages .......................................................................................................................... 31

Chapter 4 : Command Reference ....................................................................... 33

LDX-3232 Device Dependent Command Reference .......................................................... 36

Chapter 5 : Functions and Features ................................................................... 51

Saving and Recalling from the Front Panel ........................................................................ 51

Saving and Recalling Under Remote Operation......................................................................... 52

Using the Laser Compliance Voltage Adjustment............................................................... 52

Using the LDX-3232 Current Source’s Trigger Function..................................................... 52

Using the LDX-3232’s BNC Interlock Connection............................................................... 53

BNC Interlock Usage Example ................................................................................................... 53

Entering Photodiode Responsivity Values .......................................................................... 53

Modulating the Laser Current Source ................................................................................. 54

Chapter 6 : Calibration and Troubleshooting ...................................................... 55

Calibration Overview........................................................................................................... 55

Recommended Equipment ......................................................................................................... 56

Calibration of the LDX-3232 Current Source ...................................................................... 57

Current Source Calibration ......................................................................................................... 57

PD Current Calibration ................................................................................................................ 59

Laser Forward Voltage Measurement Calibration ...................................................................... 61

Troubleshooting Guide ....................................................................................................... 62

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List of Figures

Figure 1.1 LDX-3232 Front View................................................................................................ 11

Figure 1.2 LDX-3232 Rear View ................................................................................................ 11

Figure 2.1 Common Laser Cathode & Photodiode Cathode...................................................... 16

Figure 2.2 Common Laser Cathode & Photodiode Anode ......................................................... 16

Figure 2.3 Common Laser Anode & Photodiode Cathode ......................................................... 16

Figure 2.4 Common Laser Anode & Photodiode Anode ............................................................ 17

Figure 2.5 Back Panel LD Connector......................................................................................... 17

Figure 2.6 LDX-3232 Front Panel .............................................................................................. 18

Figure 3.1 LDX-3232 Command Path Structure ........................................................................ 26

Figure 3.2 Common Command Structure .................................................................................. 27

Figure 3.3 LDX-3232 Status Reporting Schematic Diagram...................................................... 29

Figure 3.4 LDX-3232 Output Off Register & Defaults ................................................................ 30

Figure 6.1 IPD Calibration Circuit............................................................................................... 56

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List of Tables

Table 1.1 Specifications............................................................................................................ 12

Table 1.2 Accessories List ........................................................................................................ 14

Table 2.1 LDX-3232 Error Indicators ........................................................................................ 20

Table 3.1 Substitute Parameter Names .................................................................................... 25

Table 3.2 Error Code Classifications......................................................................................... 31

Table 3.3 LDX-3232 Error Codes.............................................................................................. 31

Table 4.1 Remote Command Summary Reference List ........................................................... 33

Table 5.1 LDX-3232 Default Settings (Bin 0)............................................................................ 51

Table 6.1 Recommended Test Equipment................................................................................ 56

Table 6.2 Calibration Circuit Components ................................................................................ 56

Table 6.3 Current Calibration Configuration Setup ................................................................... 57

Table 6.4 Power Calibration Configuration Setup ..................................................................... 59

Table 6.5 Voltage Calibration Configuration Setup................................................................... 61

Table 6.6 Troubleshooting Guide.............................................................................................. 62

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Safety and Warranty Information

The Safety and Warranty Information section provides details about cautionary symbols used in the manual,

safety markings used on the instrument, and the information about the Warranty including Customer Service

contact information.

Safety Information and the Manual

Throughout this manual, the words Caution and Warning indicate potentially dangerous or hazardous situations

which, if not avoided, could result in death, serious or minor injury, or damage to the product. Specifically:

Indicates a potentially hazardous situation which can result in minor or moderate injury or damage to the

product or equipment.

Indicates a potentially dangerous situation which can result in serious injury or death.

Indicates visible and/or invisible laser radiation. Avoid direct exposure to the beam.

General Safety Considerations

If any of the following conditions exist, or are even suspected, do not use the instrument until safe operation can

be verified by trained service personnel:

Visible damage

Severe transport stress

Prolong storage under adverse conditions

Failure to perform intended measurements or functions

If necessary, return the instrument to ILX Lightwave, or authorized local ILX Lightwave distributor, for service or

repair to ensure that safety features are maintained (see the contact information on page 6).

All instruments returned to ILX Lightwave are required to have a Return Material Authorization (RMA) number

assigned by an official representative of ILX Lightwave Corporation. See “Returning an Instrument” on page 5 for

more information.

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Safety Symbols

This section describes the safety symbols and classifications.

Technical specifications including electrical ratings and weight are included within the manual. See the Table of

Contents to locate the specifications and other product information. The following classifications are standard

across all ILX Lightwave products:

Indoor use only.

Ordinary protection: This product is NOT protected against the harmful ingress of moisture.

Class I Equipment (grounded type).

Mains supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage.

Pollution Degree II

Installation (overvoltage) Category II for transient overvoltages

Maximum Relative Humidity: <80% RH, non-condensing

Operating temperature range of 0°C to 40°C

Storage and transportation temperature of -40°C to 70°C

Maximum altitude of 3000m (9843 ft).

This equipment is suitable for continuous operation.

Safety Marking Symbols

This section provides a description of the safety marking symbols that appear on the instrument. These symbols

provide information about potentially dangerous situations which can result in death, injury, or damage to the

instrument and other components.

Caution:

Refer to

manual

Earth Ground

Terminal

Alternating

Current

Visible and/or

invisible laser

radiation

Caution:

Risk of Electric

Shock

Protective

Conductor

Terminal

Caution:

Hot Surface

Frame or

Chassis

Terminal

On: In position of push control.

The (I) denotes that the mains

are on.

Of: Out position of push control.

The (O) denotes that the mains

are on.

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Warranty

ILX Lightwave warrants this instrument to be free from defects in material and workmanship for a period of one

year from the date of shipment. During the warranty period, ILX Lightwave will repair or replace the unit, at our

option, without charge.

Limitations

This warranty does not apply to fuses, lamps, defects cause by abuse, modifications, or use of the product for

which it was not intended.

This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of

merchantability or fitness for any particular purpose. ILX Lightwave shall not be liable for an incidental, special, or

consequential damages.

If a problem occurs, please contact ILX Lightwave with the instrument’s serial number, and thoroughly describe

the nature of the problem.

Returning an Instrument

If an instrument is to be shipped to ILX Lightwave for repair or service, be sure to:

1. Obtain a Return Material Authorization number (RMA) from ILX Lightwave Customer Service.

2. Attach a tag to the instrument identifying the owner and indicating the required service or repair. Include

the instrument serial number from the rear panel of the instrument.

3. Attach the anti-static protective caps that were shipped with the instrument and place the instrument in a

protective anti-static bag.

4. Place the instrument in the original packing container with at least 3 inches (7.5cm) of compressible

packaging material. Shipping damage is not covered by this warranty.

5. Secure the packing box with fiber reinforced strapping tape or metal bands.

6. Send the instrument, transportation pre-paid, to ILX Lightwave. Clearly write the Return Material

Authorization number on the outside of the box and on the shipping paperwork. ILX Lightwave

recommends the shipment be insured.

If the original shipping container is not available, place the instrument in a container with at least 3 inches

(7.5cm) of compressible packaging material on all sides.

Repairs are made and the instrument returned transportation pre-paid. Repairs are warranted for the

remainder of the original warranty or for 90 days, whichever is greater.

Claims for Shipping Damage

Upon receiving the instrument, inspect it immediately for any damage or shortages on the packing list. If the

instrument is damaged, file a claim with the carrier. The factory will supply a quotation for estimated costs of

repair. The customer is responsible for negotiation and settlement with the carrier for the amount of damage.

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Comments, Suggestions, and Problems

To ensure getting the most out of ILX Lightwave products, direct any product operation, service related

questions, or comments to ILX Lightwave Customer Support. Contact ILX Lightwave in whatever way is most

convenient:

Phone (800) 459-9459 or (406) 586-1244

Fax (406) 586-9405

Email [email protected]

Mailing Address:

ILX Lightwave

31950 Frontage Road

Bozeman, Montana, USA 59715

When contacting ILX Lightwave, please have the following information:

Model Number

Serial Number

End-User Name

Company

Phone Number

Email Address

Description of the problem

If ILX Lightwave determines that a return to the factory is necessary, a Return Material Authorization (RMA) will

be issued. Please mark this number on the outside of the shipping box.

The customer or carrier is responsible for any shipping damage when returning an instrument to ILX Lightwave.

ILX Lightwave recommends insuring the shipment. If the original shipping container is not available, place the

instrument in a container with at least 3 inches (7.5cm) of compressible packaging material on all sides.

Table of contents

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