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ILX Lightwave LDC-3926339 User Manual

6a current source module
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  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 User’s Guide 6A Current Source Module LDC-3926339 ILX Lightwave Corporation P. O. Box 6310 Bozeman, MT, U.S.A. 59771 · · · U.S. & Canada 1-800-459-9459 · International Inquiries: 406-586-1244 Fax 406-586-9405 · E-mail: support@ilxlightwave.com www.ilxlightwave.com 700358_02/03 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 4: Table Of Contents

    Front Panel Overview ..........11 LDC-3926339...
  • Page 5 Recommended Equipment ........68 LDC-3926339...
  • Page 6 Index ............Index-i 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 7 TA B L E O F C O N T E N T S LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 8: List Of Figures

    Figure 3.3 Event Registers ........32 Figure 3.4 LDC-3926339 Output Off Register ..... . 33 Figure 5.1 I...
  • Page 9 L I S T O F F I G U R E S LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 10: List Of Tables

    Table 5.7 Error Codes ......... 80 LDC-3926339...
  • Page 11 L I S T O F TA B L E S viii LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 12: Safety And Warranty Information

    • 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).

  • Page 13: Safety Symbols

    S A F E T Y S Y M B O L S 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.

  • Page 14: Warranty

    Returning an Instrument If an instrument is to be shipped to ILX Lightwave for repair or service, be sure to: Obtain a Return Authorization number (RA) from ILX Customer Service.

  • Page 15: Claims For Shipping Damage

    Shipping damage is not covered by this warranty. Secure the packing box with fiber reinforced strapping tape or metal bands. Send 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.

  • Page 16: Comments, Suggestions, And Problems

    W A R R A N T Y 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.
  • Page 17 W A R R A N T Y 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...

  • Page 18: Introduction And Specifications

    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.

  • Page 19: Initial Inspection

    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.
  • Page 20 Secure the module to the mainframe with two screws located at the top and bottom of the 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.

  • Page 21: Specifications

    0-8 V, 50 Ω Transfer Function: 750 mA/V ±10% High Bandwidth Mode, Large Signal DC to 100 kHz Bandwidth: Low Bandwidth Mode: DC to 27 kHz LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 22 Maximum output current transient resulting from normal operational situations (e.g., power on-off, current on-off), as well as accidental situations (e.g., power line plug removal). Maximum output current transient resulting from a 1000V power-line transient spike. Tested to ILX Lightwave Technical Standard #LDC-00196. Request ILX Application Note #3.
  • Page 23 I N T R O D U C T I O N A N D S P E C I F I C A T I O N S C H A P T E R Specifications LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 24: Chapter 2 Operations

    If an inadvertent open circuit occurs during laser operation (while the laser is on), your laser may be damaged by a momentary circuit break-and-remake before the final circuit break. The LDC-3926339 has circuitry designed to detect open circuits and shut the output off under most conditions. However, ILX recommends that LDC-3926339 Artisan Technology Group - Quality Instrumentation ...
  • Page 25 Use appropriately-shielded cabling to reduce coupling of potentially laser damaging transients. Do not bundle the current source cables with other cables in your system or laboratory. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 26: Figure 2.1 Laser Diode Connection Configurations

    Diode Earth Ground Module Output Bias Common Laser Anode Photodiode Anode A3,9 A2,4 Photo- Laser diode Diode Earth Ground Figure 2.1 Laser Diode Connection Configurations 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 27: Laser Diode Connection

    Four-Wire Voltage Sense The LDC-3926339 has a 4-wire voltage sense feature. The laser voltage is sensed through a pair of connections (pins 4 and 9) that are separate from the laser current drive connections (pins A2 and A3). This allows a more accurate laser voltage reading.

  • Page 28: Photodiode Connections

    Front Panel Overview This section describes how to operate the LDC-3926339 from the front panel of the LDC-3926 mainframe. For a more detailed explanation of the front panel keys, see the LDC-3926 User's Guide.

  • Page 29: Laser Enable Key Switch

    Pressing the MAIN key provides direct access to the Main Instrument screen. The CHAN key provides direct access to the Channel screen, where the instrument displays channel LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 30: Adjust Section

    (digital encoder), and increment and decrement keys.. Enter and Adjust Clear Keys Knob Numeric Keypad Increment and Decrement Keys Figure 2.5 Adjust Section 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 31: Operating From The Front Panel

    • CAL PD = 0.0 µA/mW • PD Bias off • LASER STEP value = 0.1 mA • LASER Tolerance values = 10 mA, 1.0 seconds LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 32: Operating In Constant Current Mode

    The voltage limit protects your laser by shutting off the source driver if the laser voltage exceeds the Vlim value. Press PREV to select the current limit (Ilim) parameter. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 33: Figure 2.7 Modulation On/Off Screen, Laser

    Also, you can turn on the current source with the F1 soft key from the CHAN menu. For safety, the ON toggle has a two-second delay before the current source is enabled. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 34: Operating A Laser In Constant Power Mode (P)

    Operating from the Front Panel Operating a Laser in Constant Power Mode (P) The LDC-3926339 module allows you to operate the current source driver in Constant Optical Power (P) mode. In P mode, the module drives current to the laser to maintain a set power value (in mW).

  • Page 35: Figure 2.9 Power Limit Setup, Laser

    Figure 2.9 Power Limit Setup, Laser Page 2 Press PREV to select the power setpoint (Pset) parameter. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 36: Figure 2.10 Laser Page Three

    Also, you can turn on the current source with the F1 soft key from the CHAN menu. The ON toggle has a two-second delay before the current source is enabled. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 37: Setting Constant Photodiode Current Mode (Ipd)

    Press the PREV/NEXT softkeys to highlight the photodiode current setpoint (Ipdset) field. Using the INC/DEC keys, Adjust knob, or keypad, enter the photodiode current setpoint value. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 38: Turning On The Laser Current Source

    Each laser current source can be turned on or off independently, or you can turn on all channels of laser sources at the same time from the All Chnl menu. See the LDC-3926 mainframe manual for more information about all-channel operation. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 39 O P E R A T I O N S C H A P T E R Operating from the Front Panel LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 40: Remote Operations

    For instance, in remote mode you have access to commands for functions not found on the front panel. This chapter explains the fundamentals of operating the LDC-3926339 remotely through the General Purpose GPIB or RS-232 interfaces.

  • Page 41: White Space

    - EOI). A carriage return (<CR>) is read as a white space. The LDC-3926 terminates its responses with <CR><NL><^END>, unless you use the TERM command to change it. See LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 42: Command Separators

    For further clarity in programming, the (Boolean) values of one (1) and zero (0) may be used or their names as indicated in the following table. Table 3.1 Substitute Parameter Names SUBSTITUTE NAME VALUE TRUE FALSE RESET 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 43 The LDC-3926 uses a terminator of <NL><^END> (new line EOI). For users whose GPIB driver defaults expect a carriage return in the terminator, <CR><NL><^END>, the "TERM" command may be used for convenience (see TERM on page 50). LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 44: Laser Diode Current Source Command Set

    Remote Configuration Laser Diode Current Source Command Set The LDC-3926339 Series modules have their own module-specific command sets, separate from the commands for the mainframe (see the mainframe Instruction Manual). Figure 3.1 shows all of the commands that are usable by the LDC-3926339 Series modules in conjunction with the mainframe.

  • Page 45: Syntax Summary

    IEEE 488.2 Common Commands and Queries are distinguished by the "*" which begins each mnemonic. The diagrams below show the syntax structure for common commands, common command queries, and common commands with numeric data required. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 46: Command Timing

    The *TST? query returns "1" if all LDC-3926 modules that were working at power- up (or at the time of the last *TST? query) have responded to the LDC-3926339 within the past 15 seconds. If any modules fail to respond to the mainframe, *TST? returns "0", and those modules are no longer recognized by the system.

  • Page 47: Query Response Timing

    In most cases this does not create a problem since the time between parsing a query and sending its response is small. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 48: Status Reporting

    Status Registers The LDC-3926339 module provides status registers which are summarized in the mainframe. These summaries are accessed using the ALLCOND? and ALLEVE? remote queries. Refer to the LDC-3926 User's Guide for details about remote status reporting.

  • Page 49: Figure 3.2 Condition Registers

    12 - n/a 5 - n/a 13 - n/a 6 - n/a 14 - n/a 7 - Open Circuit 15 - n/a Figure 3.3 Event Registers LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 50: Output Off Registers

    14 - n/a 7 - n/a 15 - n/a Figure 3.4 LDC-3926339 Output Off Register The default settings for the Output Off registers are shown in Table 3.3. These settings are not affected by the *PSC (Power-On Status Clear) command.

  • Page 51: Operation Complete Definition

    This is used to initiate service request routines that depend on the completion of all previous commands. The LDC-3926339 defines Operation Completeness as the state when all sequential and overlapped commands are completed. Most commands are sequential; only a few are overlapped. See Sequential/Overlapped Commands on page 29 and refer to your module instruction manual for a list of overlapped commands.

  • Page 52: Error Messages

    Error in conversion to unsigned 16-bit integer. E-208 Error in conversion to signed 32-bit integer. E-209 Error in conversion to unsigned 32-bit integer. E-210 Error in conversion to floating-point number. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 53 E-710 AC Power Low Error detected E-711 AC Power Low Error detected E-713 Power Brown-Out Error detected E-802 Calibration error: measurement entered before calibration was ready. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 54: Gpib Commands

    OMMAND EFERENCE This chapter is a guide to all of the commands for the LDC-3926339 6-Amp module. It contains an overview of the remote commands used by the module, shown in Table 4.1, as well as detailed command descriptions, listed in alphabetical order.
  • Page 55 Returns the constant I (current) set point. LASER:SET:LDI? NONE Returns the constant optical power set point. LASER:SET:MDI? NONE Returns the constant P (optical power) set point. LASER:SET:MDP? LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 56 *STB? Initiates an internal self-test and returns a response when *TST? complete. Prevents executing any further commands until the No- *WAI Operation-Pending flag is true. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 57: Gpib Command Reference

    GPIB Command Reference GPIB Command Reference This section presents the module commands for both local and remote operation of the LDC-3926339, listed in alphabetical order. Sub-sections for each path are presented, listing the commands which are legal for that path. *CAL? Action Adjusts the internal analog to digital (A/D) converter to reference points, then reports results.
  • Page 58 Power ON = Unused bits Notes Response is the sum of the enabled bits. This command allows you to determine which type of error has occurred. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 59 Returns a comma delimited standard format ASCII identification string, from information stored in the instrument during manufacture. LASER: The LASER: command path is used to access the LDC-3926339 current source commands. The following command paths may be reached from the LASER: command path: LASER:CAL:...
  • Page 60 None. Notes If this command is issued while the LDC-3926339 Series Laser Diode Current Source is in a Laser calibration, the calibration will be terminated and the module will operate with the same calibration values as before the calibration mode was started.
  • Page 61 See the Service Reference portion of this manual for complete calibration instructions. Examples Laser:CAL:MEAS 4.95-action: the module uses the value 4.95 for the required measurement value. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 62 Current Limit (1). LASER:COND?-response: 272, means that the Laser Output is shorted (turned off - 256) and its Interlock pins are not connected (16). 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 63 The LASER:ENABle: command path is used to access the laser status enable commands and queries. The following commands may be reached directly from the LASER:ENABle: command path. LASER:ENABle:COND • LASER:ENABle:COND? • LASER:ENABle:EVEnt • LASER:ENABle:EVEnt? • LASER:ENABle:OUTOFF • LASER:ENABle:OUTOFF? • LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 64 (in summarized form) to the LDC-3926's Status Byte: Output Shorted (256) and Voltage Limit (2). Note that the "Output Shorted" condition is the same as "Output Off". 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 65 Examples "LASER:ENAB:EVE?" -response: 256, means that the laser "Output Shorted Changed State" event is the only event that will be reported to the LDC-3926 Status Byte. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 66 LASER:EVEnt? query. Examples LASER:ENAB:OUTOFF?-response: 8, means that the Power Limit condition will cause the laser output to be turned off. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 67 This measurement is updated approximately once every 600 msec. Examples LASER:ldi?-response: 30.0, means the measured laser output current is 30.0 mA. Laser:LDI?-response: 149.6, means the measured laser output current is 149.6 mA. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 68 The current limit is in effect in all modes of operation. Examples LASER:LIM:I 80-action: the laser current limit is set to 80 mA. :Laser:Limit:I 160-action: the laser current limit is set to 160 mA. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 69 None. The response is an <nrf value>. Notes The voltage limit is valid for all modes of operation. Examples LASER:LIM:V?-response: 4.0, means the laser voltage limit is 4.0 volts. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 70 MDI by CalPD. If CalPD is 0, this query returns a -1.0. This measurement is updated approximately once every 600 msec. Examples Laser:MDp?-response: 100.0, means Laser's optical power is calculated to be 100 mW. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 71 Parameters None. Notes In high bandwidth mode the modulation bandwidth is increased. Examples Laser:mode:ihbw-action: enables the high bandwidth constant current mode for the laser current source. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 72 LASER:LDI 20; LASER:MOD ON-action: sets the laser output current to 20 mA and then turns the laser modulation switch on. Laser:Mod 0-action: disables modulation of the laser current source. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 73 The LDI set point is only in effect when the operating mode is IHBW or ILBW. Examples "LASER:SET:LDI?" -response: 50.0, means the laser output current set point value is 50.0 mA. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 74 In contrast, the laser:ldv? query returns immediately, but the measurement can be up to 600 msec old. Examples LASER:syncldv?-response: 3.03, means the measured laser output voltage is 3.03 volts. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 75 Laser:ldi 20; Laser:Step 10.0; Laser:Inc 2,50-action: sets the Laser setpoint to 20 mA, sets the step size to 10 mA, and performs two increments, separated by 50 mSec. After the increments, the setpoint is 40 mA. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 76 The MODERR? query returns a list of “module” device and command errors. The “module” errors are those which have occurred since the last “MODERR?” query. The errors are notated by a 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 77 Places an ASCII character 1 into the instrument's Output Queue when all pending operations have been finished. Response 1 - when all overlapped commands are complete. Example *OPC? LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 78 "SECURE <nrf>" command and is usually entered by the factory. Notes The arbitrary block program data is exactly 25 bytes long. *PUD? Action Requests the factory-stored identification string. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 79 Response is the sum of the enabled bits. Example *SRE 136-Enable the service request enable register condition summary and error message bits (8 + 128 = 136). LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 80 STATMENU:LINE1:IPD-response: photodiode current of laser 1 is displayed on line 1 of the STATMENU:LINE2:IPD-response: photodiode current of laser 2 is displayed on line 2 of the sta-tus menu. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 81 Example *STB?-Response 200 means the status byte condition and master status summary bits, and error message bits, are enabled. (8 + 64 + 128 = 200) LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 82 If more than 20 commands are sent before the delay or wait period is over, the additional commands will be ignored and an error E220 will be generated. Example *WAI-Wait until OPC status is true. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 83 C O M M A N D R E F E R E N C E C H A P T E R GPIB Command Reference LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 84: Calibration And Troubleshooting

    C H A P T E R ALIBRATION AND ROUBLESHOOTING This chapter describes calibration of the LDC-3926339 module. Descriptions of the required test instruments, calibration conditions, and detailed procedures for calibrating the current sources are included. A troubleshooting guide is also offered for some of the more common failure symptoms.

  • Page 85: Recommended Equipment

    LDC-3926339 at its intended use temperature if this is within the specified operating temperature range of 0-40 °C. Note: Turn on and warm-up the LDC-3926339 for at least one hour before calibration. Recommended Equipment The recommended test equipment specifications for calibrating the module are shown in Table 5.2.

  • Page 86: Table 5.4 Required Laser Current Source Calibration Components

    Table 5.4 Required Laser Current Source Calibration Components Current Source Calibration: 1 Ω 50 W resistor, low TCR Voltage Measurement Calibration: 1 Ω 50 W resistor, low TCR 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 87: Local Calibration

    After you have entered the second value, the internal calibrations procedure calibrates the LD current measurement circuit, the LD current source for both low and high bandwidths, and the LD current limit circuit. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 88: Ipd Current Calibration

    (I=E/R) and enter the value (in µA) into the highlighted IPDReal field on the screen and press ENTER. The internal calibration procedure calibrates the I current measurement circuit. The screen then displays a message indicating that the calibration has finished. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 89: Laser Forward Voltage Measurement Calibration

    After you have entered the second value, the internal calibration procedure calibrates the laser forward voltage measurement circuit. The screen then displays a message indicating that the calibration has finished. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 90: Remote Calibration

    Remote Calibration Remote Calibration The LDC-3926339 Modules can be calibrated remotely via the GPIB Interface. All of the required calibration commands are listed in Table 4.1 on page 37. The remote calibration procedures are general guidelines for writing a program to calibrate the module.

  • Page 91: Ipd Current Calibration

    The calibration procedure is ready for a measurement if it returns the value 1. Query the status until the value that is returned is 1. Enter the measured current in µA by sending the command LASER:CAL:MEAS (current LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 92: Laser Forward Voltage Measurement Calibration

    For example: LASER1:CAL:MEAS 1.40 The calibration procedure sets the output current to approximately 75% of its output range. Allow the current to settle for at least 10 seconds. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 93 After you have entered the second voltage measurement, the internal calibration procedure performs the calibration. The calibration procedure sets the status to 2, indicating the calibration is finished. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 94: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide This section is a guide to troubleshooting the LDC-3926339. Some of the more common symptoms are listed here, and the appropriate troubleshooting actions are given. If problems persist, contact ILX Customer Service (see page xii for contact information).

  • Page 95: Automatic Shut Off Conditions

    GPIB interface. Most high limit responses are set to turn off the source or give a limit warning through the GPIB interface. See the LASER:ENAB:OUTOFF command on page 49 for more information. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 96: Error Codes

    The LDC-3926339 indicates general operational error conditions on the display or through the GPIB. This section contains descriptions of the errors that are specific to the LDC-3926339 module. Refer to the LDC-3926 Manual, for a list of mainframe error codes and descriptions.

  • Page 97: Remote Accessible Error Codes

    Error in conversion to unsigned 32-bit integer. E-210 Error in conversion to floating-point number. E-211 Error in conversion to character pointer. E-212 Error in conversion to byte pointer. LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 98 AC Power Low Error detected E-711 AC Power Low Error detected E-713 Power Brown-Out Error detected E-802 Calibration error: measurement entered before calibration was ready. 02_03 LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 99 C A L I B R A T I O N A N D T R O U B L E S H O O T I N G C H A P T E R Troubleshooting Guide LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 100: Index

    25, 28 terminator string 24, 28 white space query response timing I/O buffer IEEE standard 488.2 recall invalid syntax commands configuring registers status key switch LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 101 24, 28 white space terminator terminator string 24, 28 terminators timing query response sequential and overlapped commands 24, 28 white space LDC-3926339 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 102 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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