ILX Lightwave LDC-3926339 User manual

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User’s Guide
6A Current Source Module
LDC-3926339
ILX Lightwave Corporation P.O. Box 6310 Bozeman, MT, U.S.A. 59771 :· · · 1-800-459-9459 · ·
www.ilxlightwave.com
U.S.& Canada International Inquiries: 406-586-1244 Fax [phone]
E-mail: [e-mail]
700358_02/03
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LDC-3926339 i
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T ABLE OF C ONTENTS
Table of Contents ................................................. i
List of Figures.................................................... v
List of Tables.................................................... vii
Safety and Warranty Information ................................... ix
SafetyInformationandtheManual.................................ix
GeneralSafetyConsiderations....................................ix
Safety Symbols................................................... x
SafetyMarkingSymbols ......................................... x
Warranty ....................................................... xi
Limitations ................................................xi
ReturninganInstrument ......................................xi
ClaimsforShippingDamage ..................................xii
Comments,Suggestions,andProblems ...........................xiii
Chapter 1 Introduction and Specifications
Product Overview ................................................ 1
InitialInspection ............................................... 2
InstallingtheModuleintotheMainframe ............................2
InstallingtheModule ........................................ 2
Specifications ................................................... 4
Chapter 2 Operations
Connecting to the Laser Current Source ............................. 7
LaserDiodeConnection ...................................... 10
InterlockConnections ....................................... 10
Four-WireVoltageSense .................................... 10
PhotodiodeConnections .................................... 11
GroundingConsiderations ................................... 11
Front Panel Overview ............................................ 11
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TABLE OF CONTENTS
ii LDC-3926339
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GeneralFrontPanelOperation ................................. 11
LaserEnableKeySwitch .................................... 12
DisplaySection............................................ 12
AdjustSection ............................................ 13
Operating from the Front Panel .................................... 14
LaserCurrentControllerDefaultConfiguration: ................... 14
OperatinginConstantCurrentMode............................. 15
OperatingaLaserinConstantPowerMode(P) .................... 17
SettingConstantPhotodiodeCurrentMode(Ipd) ................... 20
TurningOntheLaserCurrentSource ............................ 21
Chapter 3 Remote Operations
Remote Configuration ............................................ 23
CommandSyntax ............................................. 23
Letters .................................................... 23
WhiteSpace ............................................... 24
Terminators ................................................ 24
CommandSeparators ........................................ 25
Parameters ................................................ 25
LaserDiodeCurrentSourceCommandSet...................... 27
SyntaxSummary ............................................ 28
IEEE 488.2 Common Commands . . . . . . . . . ........................ 28
CommandTiming ............................................. 29
Sequential/OverlappedCommands.............................. 29
QueryResponseTiming ...................................... 30
Status Reporting ................................................ 31
StatusRegisters ............................................ 31
OutputOffRegisters ......................................... 33
OperationCompleteDefinition..................................34
Error Messages ................................................. 35
TestingforErrorsinRemoteOperation ......................... 35
Chapter 4 Command Reference
GPIB Commands ................................................ 37
GPIB Command Reference ........................................ 40
Chapter 5 Calibration and Troubleshooting
Calibration ..................................................... 67
RecommendedEquipment .................................... 68
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TABLE OF CONTENTS
02_03 LDC-3926339 iii
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Local Calibration ................................................ 70
CurrentSourceCalibration .................................... 70
IPDCurrentCalibration ....................................... 71
LaserForwardVoltageMeasurementCalibration ................... 72
Remote Calibration .............................................. 73
LDICalibration .............................................. 73
IPDCurrentCalibration ....................................... 74
LaserForwardVoltageMeasurementCalibration ................... 75
Troubleshooting Guide ........................................... 77
AutomaticShutOffConditions ................................... 78
ErrorCodes ................................................. 79
FrontpanelErrorIndicators .................................... 79
RemoteAccessibleErrorCodes ................................ 80
TestingforErrorsinRemoteOperation ......................... 80
Index .......................................................Index-i
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TABLE OF CONTENTS
iv LDC-3926339
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LDC-3926339 v
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L IST OF F IGURES
Figure 2.1 LaserDiodeConnectionConfigurations ................... 9
Figure 2.2 BackPanelLaserDiodeConnector...................... 10
Figure 2.3 FrontPanel ........................................ 12
Figure 2.4 DisplaySection ..................................... 13
Figure 2.5 AdjustSection ...................................... 13
Figure 2.6 ConstantCurrentModeSetup,LaserPage1 .............. 15
Figure 2.7 ModulationOn/OffScreen,LaserPage3 ................. 16
Figure 2.8 LaserPage1 ....................................... 17
Figure 2.9 PowerLimitSetup,LaserPage2 ....................... 18
Figure 2.10 LaserPageThree .................................. 19
Figure 2.11 LaserPage1 ...................................... 20
Figure 3.1 CommandPathStructure ............................. 27
Figure 3.2 ConditionRegisters .................................. 32
Figure 3.3 EventRegisters ..................................... 32
Figure 3.4 LDC-3926339 Output Off Register . . . . . . . . . . . ........... 33
Figure 5.1 IPD CalibrationCircuit ................................ 68
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LIST OF FIGURES
vi LDC-3926339
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LDC-3926339 vii
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L IST OF T ABLES
Table 3.1 SubstituteParameterNames............................ 25
Table 3.2 InvalidSyntaxCommandStrings......................... 28
Table 3.3 DefaultSettingsforOutputOffRegisters................... 34
Table 3.4 ErrorMessageCodes..................................35
Table 4.1 CommandSummary................................... 37
Table 5.2 RecommendedTestEquipment.......................... 68
Table 5.3 Required Photodiode Current Source Calibration (IPD)
CircuitComponents ................................... 68
Table 5.4 Required Laser Current Source Calibration Components . . . . . . 69
Table 5.5 Troubleshooting ...................................... 77
Table 5.6 Front Panel Error Codes. . . . . . . . ........................ 79
Table 5.7 ErrorCodes ......................................... 80
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LIST OF TABLES
viii LDC-3926339
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Safety and Warranty Information ix

                 
S AFETY AND W ARRANTY I NFORMATION
The Safety and Warranty Information section provides details about cautionary
symbols used in the manual, safety markings used on the instrument, and
information about the Warranty including Customer Service contact information.
Safety Information and the Manual
Throughout this manual, you will see the words Caution and Warning indicating
potentially dangerous or hazardous situations which, if not avoided, could result in
death, serious or minor injury, or damage to the product. Specifically:
Caution indicates a potentially hazardous situation which can result in minor or
moderate injury or damage to the product or equipment.
Warning indicates a potentially dangerous situation which can result in serious injury or
death.
WARNING
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
•Prolonged 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 xiii).
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SAFETY SYMBOLS
x Safety and Warranty Information

All instruments returned to ILX Lightwave are required to have a Return
Authorization Number assigned by an official representative of ILX Lightwave
Corporation. See Returning an Instrument on page xi for more information.
S AFETY S YMBOLS
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: 3000 m (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.
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WARRANTY
Versi on 1 Safety and Warranty Information xi

W ARRANTY
ILX LIGHTWAVE CORPORATION warrants this instrument to be free from
defects in material and workmanship for a period of one year from date of
shipment. During the warranty period, ILX will repair or replace the unit, at our
option, without charge.
Limitations
This warranty does not apply to fuses, lamps, defects caused by abuse,
modifications, or to 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 Corporation shall not be liable for any incidental, special, or
consequential damages.
If a problem occurs, please contact ILX Lightwave Corporation with the
instrument's serial number, and thoroughly describe the nature of the problem.
ReturninganInstrument
If an instrument is to be shipped to ILX Lightwave for repair or service, be sure to:
1Obtain a Return Authorization number (RA) from ILX Customer Service.
2Attach 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.
3Attach the anti-static protective caps that were shipped with the instrument and place the
Caution,
refer to
manual
Earth
ground
Te r m i n a l
Alternating
current
Visible and/or
invisible laser
radiation
Caution, risk
of electric
shock
Protective
Conductor
Te r m i n a l
Caution, hot
surface
Frame or
chassis
Ter min a l
On: In position of a bistable push control.
The slash (I) only denotes that mains are on.
Off: Out position of a bistable push control.
The circle (O) only denotes that mains are off.
or
(I) or
(O)
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WARRANTY
xii Safety and Warranty Information

instrument in a protective anti-static bag.
4Place the instrument in the original packing container with at least 3 inches (7.5 cm) of
compressible packaging material. Shipping damage is not covered by this warranty.
5Secure the packing box with fiber reinforced strapping tape or metal bands.
6Send the instrument, transportation pre-paid, to ILX Lightwave. Clearly write the return
authorization number on the outside of the box and on the shipping paperwork. ILX
Lightwave recommends you insure the shipment.
If the original shipping container is not available, place your instrument in a
container with at least 3 inches (7.5 cm) 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
When you receive 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 you with a quotation for estimated costs of repair.
You must negotiate and settle with the carrier for the amount of damage.
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WARRANTY
Versi on 1 Safety and Warranty Information xiii

Comments, Suggestions, and Problems
To ensure that you get the most out of your ILX Lightwave product, we ask that
you direct any product operation or service related questions or comments to ILX
Lightwave Customer Support. You may contact us in whatever way is most
convenient:
Phone ........................... [phone]or(406)586-1244
Fax............................................. [phone]
Onthewebat: ....................................ilx.custhelp.com
Or mail to:
ILX Lightwave Corporation
P. O . B o x 6 3 1 0
Bozeman, Montana, U.S.A 59771
www.ilxlightwave.com
When you contact us, please have the following information:
If ILX Lightwave determines that a return to the factory is necessary, you are
issued a Return Authorization (RA) number. Please mark this number on the
outside of the shipping box.
Model Number:
Serial Number:
End-user Name:
Company:
Phone:
Fax:
Descriptionofwhatis
connected to the ILX
Lightwave instrument:
Description of the problem:
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WARRANTY
xiv Safety and Warranty Information

You or your shipping service are responsible for any shipping damage when
returning the instrument to ILX Lightwave; ILX recommends you insure the
shipment. If the original shipping container is not available, place your instrument
in a container with at least 3 inches (7.5 cm) of compressible packaging material
on all sides.
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LDC-3926339 1
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CHAPTER 1
                 
INTRODUCTION AND SPECIFICATIONS
This chapter is an introduction to the LDC-3926339 6-Amp Laser Diode Current
Source module for the LDC-3926 mainframe. This chapter contains unpacking
information, installation instructions, applying power, and safety considerations
and instructions. It also contains maintenance information and specifications.
If any of the following symptoms exist, or are even suspected, remove the LDC-3926339
Module from service. Do not use the module until trained service personnel can verify
safe operation.
Visible damage
Severe transport stress
Prolonged storage under adverse conditions
Failure to perform intended measurements or functions
If necessary, return the LDC-3926339 to ILX Lightwave for service and repair to ensure
that safety features are maintained.
Product Overview
The LDC-3926339 contains a laser diode current source. The current source
provides high stability output up to 6 Amps, with fully redundant current limits and
multiple laser protection features such as contact bounce detection, voltage limit
adjust, and 4-wire voltage measurement for precise laser diode forward voltage
measurement.
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INTRODUCTION AND SPECIFICATIONS
Product Overview
2 LDC-3926339
CHAPTER 1

Initial Inspection
When you receive your LDC-3926339 module, check for shipping damage
immediately. Shipping damage is not covered under warranty. Contact ILX
Customer Service (see page xii for contact information) if the module appears to
have shipping damage.
Verify that the module has an ESD protective hood on the combo-D connector
and that it is enclosed in an ESD safe handling bag (when shipped separately
from the mainframe). Remember to follow proper ESD safe handling procedures
before handling the module.
Installing the Module into the Mainframe
These instructions are for installing the LDC-3926339 module into the LDC-3926
mainframe.
Static discharge can damage your new Laser Diode Controller Module. Be certain you
use proper grounding procedures before unpacking and installing your module(s) into
the LDC-3926 mainframe.
Inspect the module for any visible shipping damage that may have occurred
before inserting the module into the mainframe. Pay special attention to the
copper shielding material on the right edge of the rear panel of the module.
Be sure that the LDC-3926 mainframe power is off before inserting or removing any
module. Inserting or removing a module while the mainframe power is on is known as
hot-swapping.
Hot swapping may cause hardware, calibration data, and memory damage or loss. Module
damage from hot-swapping is NOT covered under warranty.
Installing the Module
1Unwrap the module from the anti-static bag.
2Make sure the LDC-3926 mainframe is turned off.
3Align the top and bottom edges of the module with the plastic guides in the desired slot on
the mainframe. Make sure the copper shielding is facing the power entry side of the rear
panel.
4Carefully slide the module, 40-pin connector first, into the LDC-3926 mainframe until the
connector is seated. Make sure to seat the module. The rear panel of the module is flush
with the mainframe when properly inserted.
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INTRODUCTION AND SPECIFICATIONS
Product Overview
02_03 LDC-3926339 3
CHAPTER 1
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5Securethemoduletothemainframewithtwoscrewslocatedatthetopandbottomofthe
module rear panel.
The LDC-3926339 module can be installed in only the LDC-3926 mainframe; it will not fit
into the LDC-3900, LDC-3908, or LDC-3916 mainframes.
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