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LDC-3916 16-Channel Laser Diode Controller

1. Figure 2 2 Display Controls Screen Hard Keys The menu structure is initiated using one of the primary Menu Control keys These keys provide direct access to the Main and Channel menus as well as movement within the screens used most often for instrument control They are located in the second column to the right of the display window They are labeled from top to bottom MAIN for Main Menu CHNL Channel Up Arrow and Down Arrow Depressing the Main key provides direct access to the Main Instrument screen The Chnl key provides direct access to the Channel screen where the instrument will display channel information on setpoints for the las and TEC modules The Chnl key also allows user access to complete las tec configuration screens The Up and Down Arrow keys in this section move the screen cursor around the screen to select operating parameters only Soft Keys The four keys closest to the display window are used as soft keys They perform menu specific functions within each menu When you have accessed a menu the soft key identification for this menu will appear on the right hand side of the display next to the corresponding pushbutton Soft keys may be used to initiate 07 15 LDC 3916 11 OPERATIONS LDC 3916 Front Panel Controls another menu or to change edit a parameter For example in the LAS section of the Chnl menu the word On designates the state of the output Depressing the associated soft key will change the
2. User s Guide Pm Laser Diode Controller Mainframe lii LDC 3916 LX Lihi A Newport Company ILX Lightwave 31950 Frontage Road Bozeman MT U S A 59715 U S 4 Canada 1 800 459 9459 International Inquiries 406 556 2481 Fax 406 586 9405 www newport com ilxlightwave 70025606 July 2015 TABLE OF CONTENTS E L L L L B H a El El L L El E a Ei Safety Information and the Manual llli vii General Safety Considerations 000 cece vii Safety Marking Symbols 2 ees ix Comments Suggestions and Problems liess xi Chapter 1 Introduction Product Overview 0 rn 1 Initial Inspection RR 2 Installing the LDC 3916 Laser Diode Controller 3 Grounding Requirements 2 3 AC Line Power Requirements eee 3 RS 232 Connectors ele 3 GPIB Connector s 3 The GPIB Address oa eee ea edhe GR Vah eee ee ae hdd EBA 4 Tilt Foot Adjustment llle eh 4 Rack Mounting i eR ei rug a ede 4 LDC 3916 Orientation AA nas 5 Specifications sso a pex e a LG es d PES E ER Jalan PG dans 7 Modules and Accessories e eee te eae 8 Chapter2 Operations Applying Power to Your Laser Diode Controller 9 The Power On Sequence 22 eee 9 The Power On State sic aaa Na eh he e ien tordai wend ec eh bed ees 10 07 15 LDC 3916 i Ld n dM LDC 3916 Front Panel C
3. Examples BEEP response 0 means the beeper is disabled Beep response 1 means the beeper is enabled for normal operation 07 15 LDC 3916 45 J COMMAND REFERENCE _ Device Dependent Command Reference CHANnel FRONT PANEL REMOTE The CHANnel command selects the modules that will receive subsequent channel based commands Parameters An nrf values a list of comma separated nrf values or ALL where the nrf value 1 16 represents an LDC 3916 channel number Notes The modules in the selected channels will receive all channel based commands until the next channel command Selecting a channel remotely does not affect the front panel display To change the front panel display remotely see Menu command If an invalid missing module is selected an E227 error will be generated and the channel will not be changed Examples chan 1 action selects the module in channel 1 for further channel based commands assuming a module exists in the channel Chan 1 3 4 8 action selects the modules in channels 1 3 4 and 8 for further channel based commands Channel all action selects all available modules for further channel based commands CHANne1 FRONT PANEL REMOTE The CHANnel query returns the channel numbers of the modules that have been selected to receive channel based commands Parameters None The response will be the channel numbers of the selected modules Notes If no channels are found by t
4. 2 Common Commands a na saaana cece ees 36 LDC 3916 Controller Specific Commands 0000 cece eee 37 Status Reporting 20 0 0 ccc tees 37 Event and Condition Registers 00c cee eee eee eee 37 Operation Complete Definition liliis 38 Command TIMING usc aes Ra ec ok a oe aT CR a ORC de 40 Sequential Overlapped Commands 00 cence eee eee 40 Query Response Timing llle ee 40 Error Messages s eee ie RERO ee ais e ea e Mas Se AER 41 ii LDC 3916 Ni ILX Lightwave Chapter4 Command Reference LDC 3916 Device Dependent Commands 200 44 Device Dependent Command Reference susu 45 IND OX esa hie hed thawed Se ad wae WENA ee ene ease Index i 07 15 LDC 3916 iii L 4 pee ens iv LDC 3916 IX Lightwave LIST OF FIGURES E L L L L B a B El Bl L E E El a El Figure 1 1 Controller Front View eere 5 Figure 1 2 Controller Rear View 0c eee eee eee 6 Figure 2 1 Initialization Screen llle 10 Figure 2 2 Display Controls Screen a a 11 Figure 2 3 Adjust Controls ics bark RREERR PER 12 Figure 2 4 Main Menu 22 2 BB 14 Figure 2 5 Channel Menu elei 15 Figure 2 6 System Configuration Menu lesse 15 Figure 2 7 Communications Configuration Menu 16 Figure 2 8 Display Configuration Menu sess 16 Figure 2 9 Calibration Me
5. 2 Controller Rear View M warnine Poientially lethal voltages exist within the LDC 3916 Laser Diode Controller To avoid electric shock do not perform any maintenance on the instrument unless you are qualified to do so Qualified service personnel are required to wear protective eyewear and anti static wrist bands while working on the LDC 3916 Laser Diode Controller circuit boards High voltages are present on and around the Controller s printed circuit boards There are no user serviceable parts in the instrument Contact ILX Customer Service see Comments Suggestions and Problems on page xi for contact information for information about servicing the instrument 8 N ENCA IDILX Lightwave 07 15 Specifications Table 1 1 General Specifications INTRODUCTION Specifications Specification Description Chassis Ground 4mm banana jack GPIB Connector 24 pin IEEE 488 RS 232 Connector 9 pin D sub Modulation Connector BNC Power Requirements Selectable voltage 110 130 VAC 60 Hz 210 240 VAC 50 60 Hz Size H x W x D 133mm x 482mm x 653mm 5 25 x 18 98 x 25 7 Weight Mainframe 34 4 kg 76 lbs Weight with Modules 41kg 91 Ibs Operating Temperature 0 C to 40 C Storage Temperature 40 C to 70 C Humidity 20 85 non condensing Laser Safety Features Keyswitch interlock output delay Meets CDRH US21 CFR 1
6. Notes The message may contain any ASCII character but will be terminated when a NULL terminator character is received If the message has less than 16 bytes the software will fill the remaining message space with the space character After 16 bytes have been entered the software will null terminate the string Examples MESSAGE This is a test action The string This is a test will be stored in non volatile memory Mes Test 3 action The string Test 3 Will be stored in non volatile memory MESsage REMOTE The MESsage query returns the previously stored message This message will always be 16 bytes long and enclosed in quotes The message is entered via the MESsage command Parameters None The response is a 16 byte long character string Notes The response data will be a 16 byte long string If there is no previously stored message the response will be all spaces Examples MES response Test 3 means the previously stored message was Test 3 Message response This is a test means the previously stored message was This is a test 48 LDC 3916 iU Jx Lightwave 07 15 COMMAND REFERENCE Device Dependent Command Reference MODERR REMOTE 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 number code which corresponds to the type of error whic
7. adaptor with the grounding wire connected to an electrical ground safety ground The LDC 3916 s power jack and supplied power cable meet IEC safety standards AC Line Power Requirements You can operate the LDC 3916 Controller from a single phase power source delivering nominal line voltages of 110 130 VAC at 60 Hz or 210 240 VAC at 50 or 60 Hz The line power voltage can vary 10 Maximum power consumption is 1440 Volt Amps with 16 modules LDC 3916376 1 5A 9W Controller modules The instrument s operational voltage is factory configurable and need not be changed before operating the instrument AA warnine Before connecting the LDC 3916 to an AC power source verify that the power source matches the voltage setting printed on the power entry module To avoid electrical shock hazard connect the instrument only to properly earth grounded three prong receptacles Failure to observe this precaution can result in severe injury or death RS 232 Connectors The RS 232 interface consists of two 9 pin D sub connectors located on the rear panel The A connector is used to connect to the host computer with a standard straight through cable see Figure 1 2 on page 6 The B connector is not enabled at this time GPIB Connector The GPIB interface connector is located on the rear panel directly to the left of the power input module See Figure 1 2 on page 6 Attach the GPIB cable to the 24 pin interface connector which is tapered t
8. be more easily read in BIN HEX or OCT RAD dec action the decimal radix is selected rad hex ESR action the hexadecimal radix is selected response H80 means power on was detected RADix REMOTE The RADix query allows the programmer to determine which radix type for status condition and event query response data is currently selected Decimal binary octal and hexadecimal are allowed None The response will be character data A response of DEC means decimal BIN means binary HEX means hexadecimal and OCT means octal DEC is the default type The LDC 3916 Laser Diode Controller 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 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 REMOTE The SECURE command allows the service technician access to the protected user data command PUD which is a common command This data is normally iU J Lightwave 07 15 COMMAND REFERENCE CU Device Dependent Command Reference changed only at the factory and therefore the SECURE command is not needed by the user SCRo11 Parameters Notes Examples REMOTE The SCRoll command enables or disables th
9. command may be sent TEC CONST 1 111 2 004 0 456 The LDC 3916 uses a terminator of lt NL gt lt END gt 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 51 For more information refer to your GPIB driver configuration manual Figure 4 1 lists some of the LDC 3916 s device dependent commands with the full path shown for each command and a brief explanation of its usage Device dependent commands for each module are listed in the module s instruction manual IU Jx Lightwave OPERATING IN REMOTE CONTROL Laser Diode Controller Command Set Command Tree Structure The LDC 3916 commands require the full path notation root Commands ALLCOND Generic Module Commands Module specific commands CAL ALLEVE MODERR see the module instruction manual CLS BEEP MODIDN ESE BEEP MODUD ESE CHAN MODPUD ESR CHAN IDN CHECKSUM OPC DELAY OPC ERR PSC MENU PSC MES PUD MES PUD RAD RCL RAD RST SECURE SAV SCR SRE SCR SRE TERM STB TERM TST TIME WAI TIMER 3916path Figure 3 3 Command Path Structure Syntax Summary GPIB commands must contain all of the letters shown in upper case in the command definition Optional letters shown in lower case for some device dependent commands in the command reference Chapter 4 are
10. no sections of the bar graph will be back lit indicating the level of display brightness You can adjust the brightness by either rotating the Adjust Knob or depressing the Adjust Up Down Arrow keys in the section Display brightness increases from right to left Each step increases the brightness 12 5 from minimum to maximum brightness Mk ILX Lightwave OPERATIONS Using the LDC 3916 Menu Structure If there is a problem with the graphic display a display self test can be initiated from this menu After selecting the Display Test function using the hard keys use either the Adjust Knob or the Adjust Up Down Arrow keys to display the word Yes Press Adjust Enter in the section to activate the test The display will be instructed to light up all pixels You can perform a visual inspection of the display to ensure that all of the pixels are illuminated You should see a rectangular grid If you find a display problem contact the Customer Service Department of ILX Lightwave See Comments Suggestions and Problems on page xi for more information Pressing the Main or Chnl keys will return you to those specific menus Pressing any other key returns you to the previous menu The Audible beep function allows you to enable or disable an audible beep tone heard when any key either hard key or soft key is pressed The On or Off enunciator depending on the current state of this function will be highlighted when selected Use the Adj
11. used by talkers to identify the end of a message O DIO1 DIO5 DIO2 DIO6 DIO3 DIO7 DIO4 DIO8 EOI REN DAV GND Twisted pair with DAV NRFD GND Twisted pair with NRFD NDAC LHH GND Twisted pair with NDAC IFC GND Twisted pair with IFC SRQ GND Twisted pair with SRQ ATN GND Twisted pair with ATN SHIELD SIGNAL GROUND Figure 3 2 GPIB Connector Diagram Reading the GPIB Address Press the Main key on the front panel to recall the Main Menu Then press the Sys Config soft key to reach the System Config menu Next press the Comm soft key to access the Config Comm menu The instrument will display the GPIB Address there Changing the GPIB Address Every device on the GPIB bus must have a unique address The default address from the factory is address 01 If it is necessary to change the address select the GPIB Address field of the Config Comm menu Turn the Adjust Knob until the desired address value is displayed The new GPIB address will then be stored in non volatile memory The allowable address range is 0 30 for primary GPIB addressing Extended GPIB addressing is not implemented on the LDC 3916 Laser Diode Controller at this time LDC 3916 27 28 LDC 3916 OPERATING IN REMOTE CONTROL GPIB Configuration RS 232 Configuration The instrument s baud rate setting must match the baud rate used by the serial RS 232 interface which is typically a serial COMM port on your PC This section describes read
12. while dual temperature control modules provide two independent 9W outputs for control of up to 32 laser diodes per mainframe Remote operation for independent control of all sixteen channels is provided through in IEEE 488 GPIB interface or RS 232 serial interface Detailed operation information for any of the control modules is provided in their respective operation manual IN ILX Lightwave LDC 3916 1 INTRODUCTION Product Overview Initial Inspection When you receive your LDC 3916 Controller verify that the following items were shipped with the instrument LDC 3916 Laser Diode Controller LDC 3916 Mainframe Instruction Manual Power Cord Note When unpacking the instrument be sure to save the packaging and the protective ESD caps on the rear of the instrument in case you have to return the instrument to ILX Lightwave or ship it elsewhere Shipping damage is not covered under the standard instrument warranty 2 LDC 3916 uix Lightwave INTRODUCTION Installing the LDC 3916 Laser Diode Controller Installing the LDC 3916 Laser Diode Controller This section provides information about the necessary requirements to install the LDC 3916 and how to begin operating the instrument Grounding Requirements The LDC 3916 Laser Diode Controller comes with a three conductor AC power cable The power cable must either be plugged into an approved three contact electrical outlet or used with a three contact to two contact
13. 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 LDC 3916 ix Ld ee 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 In the United States Online s ti sa a Dio eee Or mail to ILX Lightwave Corporation P O Box 6310 Bozeman Montana U S A 59771 www ilxlightwave com In Europe Optical Test and Calibration Ltd Listerhills Science Park Bradford BD7 1HR United Kingdom Phone 44 1274 393857 Fax 44 1274 393336
14. 040 10 Display Vacuum flourescent 64 x 128 pixels 83mm x 41mm 1 Based on the vacuum flourescent display specification This product has passed all CE requirements and bears the CE mark Detailed specifications for any of the control modules are provided in their respective operation manual In keeping with our commitment to continuous improvement ILX Lightwave reserves the right to change specifications without notice and without liability for such changes LDC 3916 7 INTRODUCTION CHAPTER 1 Specifications 8 El LDC 3916 Modules and Accessories Modules and accessories available for the LDC 3916 Laser Diode Controller include the following Table 1 2 Options and Accessories DESCRIPTION MODEL NUMBER 16 Channel Laser Diode Controller Mainframe LDC 3916 High TEC Resolution 500 mA 9W Controller Module LDC 3916371 500 mA 9W Controller Module LDC 3916372 1A 9W Controller Module LDC 3916374 1 5A 9W Controller Module LDC 3916376 500 mA 500 mA Dual Current Source Module 1A 1A Dual Current Source Module LDC 3916332 LDC 3916334 3A Current Source Module 9W 9W Dual Temperature TEC Controller Module LDC 3916338 LDC 3916550 3A 24W Temperature TEC Controller Module LDC 3916558 Rack Mount Kit 20 5 hole spacing RM 137 Rack Mount Kit 25 hold spacing RM 138 Current Source Laser Diode Moun
15. 18 LDC 3916 For specific calibration information see the Service Reference section of your LDC 3916372 or LDC 3916374 module instruction manual Figure 2 9 Calibration Menu Save and Recall The Save and Recall feature is useful for applications in which you may need to alternate between particular instrument configurations The Save feature allows you to store easily all front panel settings for any given configuration These settings which are stored in one of ten memory bins can be retrieved at any time with the Recall function This saves setup time and it reduces the chance of setup error for tests which are repeated periodically See the relevant module manual for information on instrument configuration setup Figure 2 10 Save and Recall Configuration Menu To access the Save Recall Config menu select Sav Rec from the System Configuration menu To save an instrument setup select the desired bin number your choice of 1 10 by rotating the Knob or using the Adjust Up Down Arrow keys Then press the Save soft key The instrument will save recall up to 16 channel settings in a bin location Each channel can be configured differently and saved recalled into from a bin for future use Remember a module must be present within the mainframe in order for the mainframe to save the settings Mk ILX Lightwave 07 15 OPERATIONS Using the LDC 3916 Menu Structure To recall an instrument setup select the desired bin number
16. 2 minutes 0 76 second have passed since the LDC 3916 Laser Diode Controller was powered up TIMER REMOTE The TIMER query allows the programmer to determine how much time has passed since the last TIMER query was issued Parameters None The response is character data in the form hours minutes seconds Notes Each time the TIMER query is issued the timer is reset to O and the elapsed time since the last TIMER query is returned Examples TIMER response 00 02 00 31 means the LDC 3916 Laser Diode Controller has been on for 2 minutes 0 31 seconds since the last TIMER query was issued TIMER response 00 00 12 03 means the LDC 3916 Laser Diode Controller has been on for 12 03 seconds since the last TIMER query was issued 52 LDC 3916 iU J Lightwave
17. Online www otc co uk Email sales otc co uk In China ETSC Technologies Co 9 F Building 1 SBI Street Dongxin Road East Lake High Tech Development Zone Wuhan Hubei 430074 PRC China Phone 86 27 8717 0152 86 27 8741 2681 86 27 8780 7925 Fax 86 27 8780 7133 Online www etsc tech com Email sales etsc tech com 800 459 9459 or 406 586 1244 m 406 586 9405 nire http ilx custhelp com support ilxlightwave com In Japan Kyosai Technos 424 Shimo Ongata Machi Hachioji Shi Tokyo 192 0154 Japan Phone 81 426 521 388 Fax 81 426 513 270 In China Kyosai Technos 3F Bldg G No 21 Changjiang Road Wuxi National Hi Tech Development Zone Jiangsu P R China Phone 86 510 522 1707 Fax 86 510 522 1679 Email ilx service china kyosaitec co jp iU Jx Lightwave When you contact us please have the following information Model Number Serial Number End user Name Company Phone Fax Description of what is connected to the ILX Lightwave instrument Description of the problem 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 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 contain
18. PIB controllers This termination will be sent with all output until the TERM 0 command is sent or the LDC 3916 Laser Diode Controller is powered off Term 1 temporarily sets lt CR gt lt NL gt lt END gt as the output terminator LDC 3916 b1 J COMMAND REFERENCE E _ Device Dependent Command Reference TERM REMOTE The TERM query allows the programmer to determine whether the default IEEE488 2 standard terminator has been altered to include a carriage return Parameters None The response is an nrf values 1 TRUE 0 FALSE Notes An altered terminator will be in the form CR NL END This termination will be sent with all output until the TERM 0 command is sent or the LDC 3916 Laser Diode Controller is powered off Examples Term response 1 means that the CR NL END terminator is temporarily being used Term response 0 means that the lt NL gt lt END gt terminator IEEE 488 2 standard is being used TIME REMOTE The TIME query allows the programmer to determine how much time has passed since the LDC 3916 Laser Diode Controller was last powered up Parameters None The response is character data in the form hours minutes seconds Notes The TIME clock is independent of the TIMER clock Examples Time response 00 01 02 36 means that 1 minute 2 36 seconds have passed since the LDC 3916 Laser Diode Controller was powered up TIME response 00 32 00 76 means that 3
19. SRQ programming setup 07 15 LDC 3916 37 OPERATING IN REMOTE CONTROL Status Reporting Command Timing This section describes for each device dependent command whether that command is performed in an overlapped or sequential manner In other words it states whether the next command may begin while this command is being executed or if the next command must wait until this command is completed before its execution begins See Operation Complete Definition on page 36 for conditions about setting the operation complete flag Sequential Overlapped Commands All device dependent commands are executed in an overlapped manner subsequent commands may begin before the current command is completed Some common commands are sequential the next command must wait until this command is completed All device dependent commands are executed in an overlapped manner except the DELAY command which is sequential The operation complete flag is set after the conditions outlined in the Operation Complete Definition have been satisfied The WAI common command is an example of a sequential command which forces the next command to wait until the no operation pending flag is true This is essentially the same as waiting for the OPC flag to become true because the no operations pending flag is used to set the OPC flag bit O of the Standard Event Status Register Commands which change the status of the instrument limits or change its mod
20. a 24 pin stackable connector The extra pins are used for some twisted pair wires There are eight data input output IO lines three handshake lines and five interface management lines Eight data input output DIO lines carry both data including device dependent commands and interface messages The ATN interface management line determines whether these lines contain data or interface messages Three handshake lines ensure that all data and messages are reliably transferred NRFD not ready for data indicates whether a device can receive the next byte of data or message NDAC not data accepted indicates whether a receiving device has accepted a byte of data or message DAV data valid indicates that the signal levels on the data lines are stable and available for the receiving device s to accept iU Jx Lightwave 07 15 OPERATING IN REMOTE CONTROL GPIB Configuration Five interface management lines control the flow of information ATN attention is set by the controller in charge to define the I O lines for data or interface messages IFC interface clear is set by the system controller to initialize the bus and assert itself as controller in charge REN remote enable is set by the controller to place addressed devices into remote or local front panel control mode SRQ service request can be set by any device in the system to request service from the controller EOI end or identify is
21. alled If the text is highlighted the output is on for that respective channel Blanks indicate that there is no module present in that slot LDC 3916 21 OPERATIONS Using the LDC 3916 Menu Structure 22 LDC 3916 Figure 2 16 Summary Screen Pressing the Status soft key while in the Status menu displays the Status page This page provides the user with instant access to multiple channel status information as outlined above With the Display Up Down Arrow keys you can scroll one channel at a time through all of the modules loaded in the mainframe The laser setpoint and TEC setpoint can be changed from this page The mode of operation of the laser and the TEC determines which setpoint adjustments can be made Press the top soft key F1 once and the top line will highlight changing from the laser measurement to the laser setpoint Adjust the setpoint with either the Adjust Knob or the numeric keypad Press the top soft key a second time and the second line will change from the TEC measurement to the TEC setpoint Adjust the setpoint as before Press the top soft key a third time and the laser output may be turned on by turning the Adjust Knob or by pressing Up Down Arrow keys nearest the numeric keypad Press the soft key again and the TEC can be turned on by using the Adjust Knob or Up Down Arrow keys When all adjustments are complete press the soft key a final time Soft keys F2 F3 and F4 similarly work the same for the second thi
22. annel 8 7 e 5 4 a 2 1 o 7 Power 8 Channel 9 Standard QUEUE 9 Channel 10 Ea Status NOT EMPTY 10 Channel 11 egister ESE lt nrf gt OUTPUT LOGICAL 11 Channel 12 ESE QUEUE OR 12 Channel 13 13 Channel 14 14 Channel 15 15 Channel 16 Status Byte 0 Channel 1 SERVICE l STB i 1 Channel 2 REQUEST rfs WLT 0 TEC Event Event Status Summary Register 2 Channel 3 GENERATION 1 TEC Cond 3 Channel 4 a 25 LASER Event 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 4 Channel 5 LOGICALE i i i 3 LASER Cond 5 Channel6 OR E tol 4 Message 6 Channel 7 i 5 Event Status 7 Channel 8 7P J5 4 3 2 1 0 6 Request Service Master Status 8 Channel 9 7 Error 9 Channel 10 Service Request Enable Available 10 Channel 11 QUEUE SES 11 Channel 12 NOT EMPTY SRE LOGICAL OR 12 Channel 13 13 Channel 14 ERROR 14 Channel 15 QUEUE 15 Channel 16 3916repo Figure 3 4 Status Reporting Schematic Diagram Note The LDC 3916 does not define operation completeness in the same way as earlier model ILX instruments Care must be taken when using the OPC OPC and WAI commands with the LAS OUT ON command due to the two second turn on delay In some cases operation completion may far exceed the standard GPIB time out setting If the GPIB times out while waiting for a response either set the GPIB time out to be longer or use SRQ generated interrupts in your program See your GPIB manual for time out configuration or
23. as above and press the Recall soft key To restore the instrument default settings from the factory simply press the Default soft key Bin O contains the factory default settings Note A checksum from each module is used to ensure that the recalled setup matches the user s expectation in case a module was changed or fails to restore properly A warning will be displayed if a checksum error is found The default setting may be retrieved by entering the Default display See Chapter 3 Operating In Remote Control for remote execution of the Save and Recall functions All Channel Menu The All Channel menu offers a unique and quick way to set up all 16 channels of the instrument or any number of channels from 2 to 16 simultaneously Once all the modules are set up all of the lasers and all of the TECs may be turned on simultaneously by pressing the On soft key All of the modules must be the same model number for this feature to operate for example all 500 mA laser drive modules model LDC 3916372 or all 1A laser drive modules model LDC 3916374 Figure 2 11 All Channel Menu For example suppose you have an LDC 3916 with sixteen LDC 3916372 modules and you wish to operate sixteen lasers in low bandwidth mode at 75 mA with a limit of 80 mA and a Vlim of 3 1V at 25 C with a temperature limit of 40 C and a gain of 30 in the 100 uA sensor range for measuring temperatures between 10 C and 50 C Within this menu you would do th
24. ating technician The response is in the form of arbitrary block data with the header 221 indicating twenty one characters Notes The serial number may also be found by removing the module from the mainframe and viewing the serial number information on the side of the module Examples MODPUD response 221037200020011120498grb LDC 3916 49 50 LDC 3916 J COMMAND REFERENCE E _ Device Dependent Command Reference RADix Parameters Notes Examples Parameters Notes Examples REMOTE The RADix command allows the programmer to select the radix type for status condition and event query response data Decimal binary hexadecimal and octal are allowed Character program data is expected as shown above DECimal is the default type Only the first three letters of the words decimal hexadecimal binary or octal are required When the RADIX is selected all status condition and event queries will return values in the new radix In cases where the radix is not DECimal the flexible numeric type nrf values as shown in the Command Reference diagrams will be replaced by HEX BIN or OCT representation All of the above radixes may be used to enter program data at any time without the need for issuing the RADix command The proper prefix must also be used with Hex H binary B or octal Q This command may be useful for setting up status reporting blocks The bit wise status representation may
25. condition Otherwise multiple interrupts would occur Typical use of the ALLCOND query would be in conjunction with the STB query For example if you first read the status byte with STB and find bit O is set then you can read the ALLCOND to find out which channel s generated the change If more information is still required then you can query the contributing channel s for the appropriate conditions e g CHAN 3 LAS COND or CHAN 12 TEC COND etc For more information see the appropriate condition enable commands e g LAS ENAB COND or 07 15 LDC 3916 43 44 LDC 3916 COMMAND REFERENCE v _ Device Dependent Command Reference Examples TEC ENAB COND Refer to the appropriate module instruction manual for details on each specific module ALLCOND response 0 means the no channels have any enabled conditions to pass to the Status Byte register allcond response 9 means that channels 1 and 4 have enabled conditions Bit O of the Status Byte register is set Rad bin Allcond response B10001 means that channels 1 and 5 have enabled conditions Bit 0 of the Status Byte register is set ALLEVE Parameters Notes Examples REMOTE The ALLEVE query returns the status summary of enabled events from each channel of the LDC 3916 Laser Diode Controller None The response is the sum of the following 1 Channel 1 events 256 Channel 9 events 2 Channel 2 events 512 Channel 10 ev
26. dressing or unaddressing devices In addition some individual bus lines are designated for this purpose Talkers Listeners and Controllers Every GPIB system consists of one or more talkers and listeners and often at least one controller Talkers supply data Listeners accept data A system can consist of simply a talker and listener for example a meter connected to a datalogger or chart recorder Controllers designate talkers and listeners A controller is necessary when the active talkers or listeners must be changed IN ILX Lightwave LDC 3916 25 26 LDC 3916 OPERATING IN REMOTE CONTROL GPIB Configuration When the controller is a computer it often also designates itself as a listener so it can collect data from designated talkers If there is more than one controller only one can be the Controller In Charge CIC Control can be passed from one controller to another In a multiple controller system there can be one System Controller capable of asserting control becoming CIC GPIB Cable Connections Standard GPIB connectors can be connected together stacked allowing you to configure the system linearly or in a star configuration Device B Device A Device B Device C Device C Device D linear configuration Device D star configuration Figure 3 1 GPIB Cable Connections The GPIB Connector The standard GPIB connector consists of 16 signal lines in
27. e or current range step value or status enable registers will not have their OPC flag set until all current writing to non volatile memory has been completed This ensures the OPC flag is never set prematurely Query Response Timing Query responses are evaluated at the time the query request is parsed and not at the time the response message is sent In most cases this does not create a problem since the time between parsing a query and sending its response is small iU qJx Lightwave OPERATING IN REMOTE CONTROL Error Messages Error Messages In the event of a hardware error condition error messages are displayed on the channel menu screens In addition to hardware errors GPIB errors from the channel module may be read via the MODERR query Mainframe Errors and a binary representation of channel errors may be read over GPIB using the ERR query For example a response from ERR might look like 0 0000000010001000 This indicates that there are no Mainframe Errors and that channel 4 and channel 8 both have errors Read those error codes by sending CHAN 4 ERR CHAN 8 ERR Table 3 3 lists the numerical error ranges by function Table 3 4 on page 39 contains all of the error messages which may be generated Not all of these messages may appear on the front panel displays Some refer to GPIB activities only In remote operation the errors can be read by issuing the ERR query When this is done all of the error me
28. e auto scrolling feature of the ALL status screen A Boolean value 0 FALSE disabled non zero TRUE enabled This command affects the Status screen only The scrolling rate is not adjustable When the auto scrolling feature is enabled it is in effect until it is disabled or the LDC 3916 is powered off Scr 1 action Enables the auto scrolling feature of the Status screen SCROL 0 action Disables the auto scrolling feature of the Status screen SCRo11 Parameters Notes Examples REMOTE The SCRoll query allows the programmer to determine the status of the auto scrolling feature for the Status Menu None The response is an lt nrf values 1 TRUE enabled O FALSE disabled In local operation the user must select the Status screen in order to determine if the auto scrolling feature is in use Scroll response 1 means that auto scrolling is enabled for the Status screen SCR response 0 means that auto scrolling is disabled for the Status screen TERM Parameters Notes Examples REMOTE The TERM command allows the programmer to change the default IEEE488 2 standard terminator to include the carriage return An lt nrf value gt 0 FALSE non zero TRUE An altered terminator will be in the form CR NL END Technically this takes the LDC 3916 Laser Diode Controller out of IEEE488 2 specification but this command may be used for convenience when using non standard G
29. e following Setting All LAS From the All Channel menu select Set LAS with the appropriate soft key This will display the All LAS Set p 1 menu Use the Display Up Down Arrow keys to select Iset which will be highlighted when selected Next program in the desired current set point using the Adjust Knob keypad or Adjust Up Down Arrow keys to enter 75 00 mA Use the Display Up Down Arrow keys to arrow down to Ilim Set the current limit to 80 mA as described above Arrow down to Vlim and set the laser LDC 3916 19 OPERATIONS Using the LDC 3916 Menu Structure 20 LDC 3916 protection forward voltage limit to 3 1V Again arrow down to Mode and using the Adjust Knob or Adjust Up Down Arrow keys select Ilbw for Low bandwidth mode i e lowest noise mode When the desired fields are set correctly turn on all 16 channel outputs with the On soft key Use the Up Arrow soft key to return to the All Channel menu Figure 2 12 Setting All LAS menu Setting All TEC Select SET TEC with the appropriate soft key This will display the All TEC Set p 1 menu As above set the Tset temperature to 25 9C Arrow down to Tlim and set the temperature limit to 40 9C Next set the mode to T for constant temperature mode by arrowing down to the Mode field and setting it as described above i LESS A a ka Figure 2 13 All TEC Menu page 1 To set the gain sensor range and sensor thermistor constants press the Down Arro
30. e recognized by the system A list of the IEEE 488 2 Common Commands supported by the LDC 3916 CAL CLS ESE ESE ESR IDN OPC OPC PSC PSC PUD PUD RCL RST SAV SRE SRE STB TST WAI For more information on these commands refer to an ANSI IEEE 488 2 1987 standards reference LDC 3916 Controller Specific Commands The LDC 3916 s command set can be divided into three categories 1 IEEE 488 2 common commands 2 LDC 3916 mainframe commands and 3 module dependent commands The IEEE 488 2 common commands and LDC 3916 mainframe commands are documented in this manual The commands which apply to each module are found in that module s instruction manual Status Reporting This section contains information for understanding instrument error and status reporting It also contains information regarding the use of the instrument status for generating interrupts for interrupt driven programs or subroutines Understanding the Operation Complete definition for the instrument is useful for programming synchronization The Output Off Register section also contains information on setting some of the conditions which will force the laser current source and or TEC output to turn off The following sections describe the Event and Condition registers Operation Complete flag Output Off registers and Error Messages Event and Condition Registers In addition to the required IEEE 488 2
31. e set An lt nrf values which represents the delay time in milliseconds Further commands are held off until the delay period elapses This command is useful for creating delays which do not require very much program code and do not tie up the GPIB during execution DELAY 500 action Further commands and queries are not executed until 0 5 second has elapsed from the time this command is executed Tec T 22 Delay 2000 Tec T actions The TEC is set to 22 0 C then the LDC 3916 Laser Diode Controller waits for about 2 0 seconds before displaying the measured temperature ERRors Parameters Notes Examples REMOTE The ERRors query returns a list of mainframe device and command errors followed by a binary representation of the occurrence of module device and command errors The mainframe errors are those which have occurred since the last ERR query The module errors are not cleared until the MODERR query is sent to each module which reports an error The errors are notated by a number code which corresponds to the type of error which occurred See Chapter 3 Error Messages for information regarding error handling None The response consists of one or more mainframe error code values separated by commas and a 16 bit binary representation of errors which exist on each channel A response of 0 0000000000000000 indicates that no errors were reported The first zero indicates no mainframe errors and t
32. ents 4 Channel 3 events 1024 Channel 11 events 8 Channel 4 events 2048 Channel 12 events 16 Channel 5 events 4096 Channel 13 events 32 Channel 6 events 8192 Channel 14 events 64 Channel 7 events 16384 Channel 15 events 128 Channel 8 events 32768 Channel 16 events Each channel s events which are summarized here represent that channel s contribution to the Status Byte Register All of the bits of the ALLEVE register are logically ORed to set or clear bit 1 of the Status Byte Register The value of the ALLEVE register is not cleared until it is read using the ALLEVE query Thus if an SRQ is generated from any of the event bits of the ALLEVE register it is necessary to use the ALLEVE query in the user s interrupt service routine to reset the interrupt enabled condition Otherwise multiple interrupts would occur Typical use of the ALLEVE query would be in conjunction with the STB query For example if you first read the Status Byte with STB and find that bit 1 is set then you can read the ALLEVE to find out which channel s generated the change If more information is required then you can query the contributing channel s for the appropriate events i e CHAN 11 LAS EVE or CHAN 3 TEC EVE etc For more information see the appropriate event enable commands e g LAS ENAB EVE or TEC ENAB EVE ALLEVE response 0 means the no channels have any enabled events to pass to the Status Byte registe
33. er is not available place your instrument in a container with at least 3 inches 7 5 cm of compressible packaging material on all sides We look forward to serving you even better in the future LDC 3916 xi BG et xii LDC 3916 IU Jx Lightwave CHAPTER 1 INTRODUCTION 5 B El a Bi a El El mH E Ej B B E El E E Ei This chapter is an introduction to the LDC 3916 Laser Diode Controller It contains unpacking information instructions on how to install and apply power and safety considerations It also contains some maintenance information specifications and a list of options and accessories Product Overview The LDC 3916 Multi Channel Laser Diode Controller accepts up to 16 channels of laser diode current source and temperature control modules in a space saving rack mountable instrument On board microprocessors in each module receive control data from the 3916 mainframe and handle control measurement and laser protection functions Sixteen independent isolated linear power supplies power each module providing per channel laser diode protection low noise and high current stability A wide variety of modules are available including laser controller modules dual channel laser current source and dual channel temperature control modules Controller modules source up to 1 5A of laser current with an integrated 9W temperature controller Dual laser current source modules with two isolated outputs source up to 1A per channel
34. eturns a value which is the checksum of the 3916 setup parameters DELAY 1 Used to create a delay in the execution of further commands ERR NONE Returns errors generated since the last query ENU 1 Selects a menu for the front panel display ES 1 Enters a string message of up to 16 bits ES NONE Returns a previously stored ASCII message ODERR NONE Returns the error codes of the selected channel s ODIDN NONE Returns the model number serial number and firmware version of the selected channel s ODPUD 1 Sets the module data factory use only ODPUD NONE Returns the module data RAD 1 Sets the radix for integer data Decimal binary octal or hexadecimal RAD NONE Returns the radix type for numerical data SECURE 1 Used to gain access to protected data SCR 1 Enables or disables auto scrolling in the status menu SCR NONE Returns the status of the auto scrolling feature E 1 Adds a carriage return to the device terminator ERM NONE Returns the status of the TERM command IME NONE Returns the elapsed time since the instrument was last powered up IMER NONE Returns the elapsed time since the timer was last reset 42 LDC 3916 iU mJx Lightwave COMMAND REFERENCE Device Dependent Command Reference Device Dependent Command Reference This section presents the mainframe device dependent commands for both local and remote operation of the LDC 3916 Laser Diode Controller listed in alphabetical o
35. h occurred See the appropriate module instruction manual for information regarding error handling for each specific module Parameters None The response consists of one or more module error code values separated by commas Notes A response of 0 indicates that no errors were reported The response data is sent as character data Examples MODERR response 0 means no module errors reported Moderr response 501 means that the module has a LASER interlock error which prevented the LAS output from being turned on MODIDN REMOTE The MODIDN query returns the module s model name and serial number Parameters None The response consists of the module s model number serial number and version number separated by commas Notes The serial number may also be found by removing the module from the mainframe and viewing the serial number information on the side of the module Examples MODIDN response 3916374 03740001 v1 00 for example MODPUD REMOTE The MODPUD command allows the service technician to enter the protected user data This data is normally changed only at the factory and therefore the MODPUD command is not needed by the user MODPUD REMOTE The MODPUD query returns protected user data from a module This data is entered by factory personnel when the module is calibrated Parameters None The response consists of serial number hardware version option information calibration date and initials of the calibr
36. he mainframe the response will be 0 Examples CHAN response 12 means the module in channel 12 is selected for channel based commands CHan response 3 4 16 means the modules in channels 3 4 and 16 are selected for channel based commands channel response ALL means that channel based commands will be sent to all available modules CHECKSUM REMOTE The CHECKSUM query returns an integer value which is the summation of all pertinent parameters of the present configuration Parameters None The response consists of an integer value Notes The response value may be stored and compared at a later time to verify that the present configuration of the instrument is the same as expected This 46 LDC 3916 iU Jx Lightwave 07 15 Examples COMMAND REFERENCE Device Dependent Command Reference feature works well with the RCL recall command as a means of verifying a stored setup The checksum does not test the functionality of the instrument or which modules are present CHECKSUM response 3812 is the checksum of the present configuration of parameters on the instrument DELAY Parameters Notes Examples REMOTE The DELAY command causes the execution of commands to be delayed by a user defined time interval This command is similar to the WAI common command except that execution resumes after the specified number of milliseconds instead of waiting for the Operation Complete flag to b
37. he second 16 bit zero indicates no module errors The response data is sent as character data ERR response 0 0000000000000001 means no mainframe errors reported but channel 1 has an error Use Chan 1 MODERR to retrieve the error code s from channel 1 Errors response 219 1111111100000000 means that the LDC 3916 was unable to restore the setup parameters at power up because of a change in modules Also there are errors present on channels 9 16 LDC 3916 47 J COMMAND REFERENCE E _ Device Dependent Command Reference MENU REMOTE The MENU command causes the front panel display to switch to the Parameters An nrf values which represents the front panel menu selections 1 Channel Menu 2 Status Menu or 3 Summary Menu Notes This command is useful for visually monitoring activity from the front panel while in remote operation The channel used when the parameter is 1 is the remotely selected channel not the last front panel selected channel see Channel command Examples Menu 1 action sets the front panel display to the remotely selected channel s main menu MENU 2 action sets the front panel display to the Status menu MESsage REMOTE The MESsage command allows the user to enter an ASCII string of up to 16 non zero characters This command may be useful for storing messages which relate to a test or configuration Parameters An ASCII string that is 1 16 bytes in length
38. ing and changing the baud rate of the LDC 3916 The LDC 3916 s RS 232 is configured for 8 bit no parity This is not adjustable Only the baud rate may be altered Reading the Baud Rate Press the Main key on the front panel to recall the Main Menu Then press the Sys Config soft key to reach the System Config menu Next press the Comm soft key to access the Config Comm menu The instrument will display the baud rate there Changing the Baud Rate The factory default baud rate is 19200 If it is necessary to change the baud rate select the Baud rate field of the Config Comm menu Turn the Adjust Knob until the desired baud rate value is displayed The new baud rate will then be stored in non volatile memory The allowable baud rates are 1200 2400 4800 9600 and 19200 Refer to the serial port configuration of your PC if used for the appropriate baud rate Changing Operation from Local to Remote Sending a command over the GPIB or RS 232 interface will automatically put the instrument in REMOTE mode The REMOTE indicator on the lower right of the front panel will illuminate when the controller is in remote operation mode When the instrument is in REMOTE mode pressing the LOCAL switch on the front panel returns the instrument to LOCAL control mode unless a Local Lockout state has been activated by the low level GPIB command LLO from the host computer GPIB only Local Lockout disables all LDC 3916 front panel switches until th
39. inside of your rack enclosure to support your LDC 3916 along each side at the bottom of the instrument There are two kits available as mentioned above Kit number RM 137 is for rack enclosures 24 inches in depth RM 138 is for rack enclosures 30 or 36 inches in depth Each kit comes with the necessary hardware including fasteners and instructions for their use 4 LDC 3916 Mk ILX Lightwave 07 15 INTRODUCTION Installing the LDC 3916 Laser Diode Controller LDC 3916 Orientation Now that the LDC 3916 Laser Diode Controller is installed and ready for use you are ready to learn about its operation Figure 1 1 and Figure 1 2 show front and rear views of the instrument The figures identify such items as functional keypad groupings rear panel connectors and switches Use these figures to familiarize yourself with your new controller Please refer to Chapter 2 Operations for operating fundamentals of your controller Menu Control Laser Enable Keys Main Parameter Adjust Key Swicth Menu Soft Keys Chnl Up Down Keys F1 F2 F3 F4 Arrows Adjust Knob Power Switch Vacuum Fluorescent Numeric Keypad Display Figure 1 1 Controller Front View LDC 3916 5 INTRODUCTION Installing the LDC 3916 Laser Diode Controller 15 pin TEC Channel 1 GPIB Connector Modulation Input Channel 16 Connector BNC Connector Power Cord Connector 9 pin LD Connector RS 232 B Inactive RS 232 A Input Ground Connector Figure 1
40. is condition is changed by the host computer In this condition the REMOTE indicator will flash at a 1 Hz rate Menu changes are allowed by using the soft keys in Remote mode Changing channels is allowed by using the Adjust Knob or Arrow keys Other items in menus such as setpoint adjustments mode changes cursor movements or turning the TEC laser on or off are not allowed The TALK LISTEN indicator on the front panel is illuminated when the instrument is communicating over the GPIB or RS 232 interface For more information on low level commands such as LLO refer to the IEEE488 1 specification iU Jx Lightwave OPERATING IN REMOTE CONTROL GPIB Configuration GPIB Versus RS 232 Communications The LDC 3916 should not be run remotely via GPIB and RS 232 at the same time When using the RS 232 interface the remote GPIB command set is fully operable Command syntax does not vary between GPIB and RS 232 usage However the commands which affect GPIB hardware operation will not be useful For example the user could send the SRE command via RS 232 However any service request SRQ via GPIB would not be visible since RS 232 has no hardware to support it This is because SRQ is a function of the GPIB interface hardware and is not available via RS 232 07 15 LDC 3916 29 30 J OPERATING IN REMOTE CONTROL Laser Diode Controller Command Set Laser Diode Controller Command Set LDC 3916 This section contains information abo
41. mask has bit 5 set and the user issues an OPC command the SRQ signal will be generated upon completion of the currently processed commands This may be used to initiate service request routines which depend on the completion of all previous commands The LDC 3916 defines Operation Completeness to be the state when all sequential and overlapped commands are completed Most LDC 3916 commands are sequential only a few are overlapped Refer to your module s instruction manual for a list of overlapped commands 36 LDC 3916 I ILX Lightwave OPERATING IN REMOTE CONTROL Status Reporting Standard Event Status 0 Channel 1 ESR Condition Status Summary Register z s s s s e i o 9 Operation ALLCOND ry eg 1 Channel 2 1 1 Request 2 Channel 3 amp i S Query 1511413 1211 10 9 8 7 6 5 4 3 2 1 0 3 pa Channel 4 LOGICAL Hre T 3 Device Dependent 4 Channel 5 OR d h 4 Execution 5 Channel 6 5 Command 6 Channel 7 6 User 7 Ch
42. n each individual module Refer to the appropriate module manual for details on limit current settings and laser diode protection The allowable bandwidth of the modulated signal defined as the 3 GB roll off point is dependent on the current source module used the Laser current range and the Laser mode constant current low high bandwidth See the laser current source specifications in the appropriate module instruction manual for external analog modulation bandwidth specifications Modulation Setup Example For example assume you are using an LED that must be operated in constant current of 50 mA with a modulated injection current from 3 to 30 kHz The experiment requires an LDC 3916372 laser controller module to be configured for high bandwidth mode with a limit of 175 mA LDC 3916 23 OPERATIONS Using the LDC 3916 Menu Structure Set the LDC 3916372 module in Constant Current High Bandwidth Mode by selecting IHBW in the LAS menu on the front panel Set the current to 50 mA and set the current limit for the LDC 3916372 as desired Enable modulation by selecting On for the Modulation selection in the LAS p 3 laser page 3 menu Now you are ready to modulate the laser current From the LAS menu press the Off soft key to toggle the laser current output on The soft key indicator will change to On To turn the output off press the On soft key to toggle it Off again Note If the modulation signal attempts to drive the outp
43. n more detail later in this chapter BIN 0 contains all of the default configurations The default configuration information for each module is found in the each module instruction manual Note If the instrument cannot successfully complete the power on test that is cannot identify a module or modules inserted into the mainframe that module or modules will not be identified in the Status Screen Power down the instrument and check to see if the modules are correctly seated and fastened to the mainframe If you continue to experience power up problems power down the instrument and contact an ILX Lightwave Customer Service Representative 10 LDC 3916 IU Jx Lightwave OPERATIONS LDC 3916 Front Panel Controls LDC 3916 Front Panel Controls All key operating parameters for the LAS laser and TEC modules can be set adjusted and displayed through established menus See the respective module manual for further information on each module Display Controls All key operating parameters for the LAS laser and TEC modules can be set adjusted and displayed through established menus See the respective module manual for further information on each module The menus on the display are controlled by using the keys pushbuttons to the right of the display box There are two kinds of keys the hard keys and soft keys The hard keys have only one function while the function of the soft keys varies with each menu on the display
44. normally puts the terminator at the end of each command string line this simply means that an extra space character at the end of your command line works OK iU Jx Lightwave 07 15 OPERATING IN REMOTE CONTROL Laser Diode Controller Command Set A query has no space between the mnemonic and the question mark For example Okay Not Okay TIMER TIMER Note that too many consecutive white spaces can overflow the 80 byte data I O buffer Terminators A program message terminator identifies the end of a command string These are the valid terminator sequences NL END lt NL gt lt END gt Many computers terminate with lt CR gt lt NL gt lt END gt Carriage Return New Line EOI A carriage return CR is read as white space The LDC 3700B terminates its responses with CR NL END unless you use the TERM command to change it If you encounter problems with GPIB communications the terminator string can sometimes be the cause Refer also to your GPIB interface controller manual Command Separators You can put more than one command on the same line same command string if you separate them with a semicolon The semicolon can be preceded by one or more spaces Examples EC DIS 1 tec set t EC MODE t TEC T 25 TEC Const 1 2 3 5 TEC OUT 1g1 Parameters Some commands require a parameter The parameter must be se
45. nu 00 eee 18 Figure 2 10 Save and Recall Configuration Menu 18 Figure 2 11 All Channel Menu 0200 0 eee 19 Figure 2 12 Setting All LAS menu 000055 20 Figure 2 13 All TEC Menu page 1 eee eee ee 20 Figure 2 14 All TEC Menu page 2 0 aa 21 Figure 2 15 Status Menu 2 21 Figure 2 16 Summary Screen 0000 cee eee eee ee 22 Figure 2 17 Status Screen page 2 22 Figure 2 18 LDC 3916 Controller Modulation Input 24 07 15 LDC 3916 v Figure 3 1 GPIB Cable Connections 000 eee 28 Figure 3 2 GPIB Connector Diagram 0000 eee eee 29 Figure 3 3 Command Path Structure 0 0000005 35 Figure 3 4 Status Reporting Schematic Diagram 39 vi LDC 3916 Ii ILX Lightwave 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 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 A CAUTION Caution indicates a potentially hazardous situation
46. o ensure proper orientation Finger tighten the two screws on the cable connector 07 15 LDC 3916 3 4 INTRODUCTION Installing the LDC 3916 Laser Diode Controller A total of 15 devices can be connected together on the same GPIB interface bus The cables have single male female connectors on each end so that several cables can be stacked This permits more than one cable to be attached to any one device However the maximum length of the GPIB cables must not exceed 20 meters 65 feet total or 2 meters 6 5 feet per device The GPIB Address The talk and listen addresses on the LDC 3916 Laser Diode Controller are identical The controller comes from the factory configured with the GPIB address set to 1 You can change the LDC 3916 s GPIB address locally via the front panel A procedure for changing the address can be found in Changing the GPIB Address on page 27 Tilt Foot Adjustment The LDC 3916 Laser Diode Controller comes standard with folding front legs and two rear feet for use as a benchtop instrument The front panel vacuum Fluorescent display may be easier to read if you extend the front legs so that the instrument front panel tilts upward Simply place the unit on a stable base and rotate the front legs downward until they lock into position Rack Mounting The LDC 3916 can be mounted in a standard 19 inch rack with two available Rack Mounting Kits These kits contain instrument support brackets which fasten to the
47. od 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 Returning an Instrument If an instrument is to be shipped to ILX Lightwave for repair or service be sure to 1 Obtain a Return Authorization number RA from ILX 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 5 cm 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
48. on in the Power section of the front panel to change the setting from zero 0 to one 1 This action will initiate the Power on sequence If the LDC 3916 does not appear to turn on verify that it is connected to line power If line power is not the problem remove the power cord and check the line power fuse The Power On Sequence When power is applied to the LDC 3916 the following takes place for about six seconds the initialization screen is displayed showing the company name and logo the name of instrument and firmware version in the lower left hand corner of the screen During this time a self test is performed to ensure that the mainframe processor is communicating with the processor s of any module s connected to the mainframe and identifying which module model is present After this test the instrument is ready to operate and is configured to the state it was in when the power was last shut off I Ix Lightwave LDC 3916 9 OPERATIONS Applying Power to Your Laser Diode Controller Initializins 1 01 Figure 2 1 Initialization Screen The Power On State The instrument is configured to the state it was in when power was last shut off and according to the type of module in each bay either a 500 mA or 1A combination module You can choose to clear the last saved instrument state by recalling the default values These values are stored in BINS which you can use to save or recall instrument configurations described i
49. ontrols 2 11 Display Controls een 11 Adjust Controls 2 2 rude eR pee EI de RE had 12 Using the LDC 3916 Menu Structure 0 0 c eee eee eee 14 Main Ment iss nah eh teed e ERE IR I kad PAG ee p ART ER ena uos 14 Channel MENU 2 co ce ata C Cue e a RC de a ahaa ac 14 System Configuration lisse 15 Communications Configuration liliis 15 Display Configuration nen 16 CallDEAOFE cei act cto cac aati a D RT a DR Pe Cac D Ga Rd e a e 17 Save and Recall aste KA rica ge DE i DR TUR wa 18 All Channel Menu 1 res 19 Setting All TEG uiii te tei sspe Cav uu yaa UR E wet 20 Status Ment sedrs soe icc da e a eoe ea a kt en t CC RR 21 Modulating the Controller Laser Current Sources 24 Chapter 3 Operating In Remote Control GPIB Configuration ee 27 Data and Interface Messages 00 e eee eee 27 RS 232 Configuration lisse 30 Changing Operation from Local to Remote 000 cece 30 GPIB Versus RS 232 Communications llli 31 Laser Diode Controller Command Set Luuuluusuuu 32 Command Syntax ees 32 LEETS cca toa e ee me Res oe ee ee Ee A eR 32 White Space 0 00 ccc tne eee 32 Terminators ovs ebbe ia UNA a whee eee e pad VET PARAAN 33 Command Separators tees 33 Parameters isses ke RUE G4 ee heed RR GR BALE we tle ee A 33 Syntax Summary asnasa uaaa aaaea 35 IEEE 488
50. ow E 711 AC power low E 712 Over temperature Error found on internal sensor E 713 Power Brown out Error detected E 714 Internal Error writing to display E 9xx Internal communications warnings 40 LDC 3916 iWILX Lightwave CHAPTER COMMAND REFERENCE 5 B El a Bi a El El mH Li El B ia a E Li E El This chapter is a guide to all of the mainframe device dependent commands for the LDC 3916 Laser Diode Controller The chapter is divided into two parts The first contains an overview of the remote commands used by the LDC 3916 as shown in Table 4 1 The second part contains all of the LDC 3916 command descriptions listed in alphabetical order iit ILX Lightwave LDC 3916 41 COMMAND REFERENCE LDC 3916 Device Dependent Commands LDC 3916 Device Dependent Commands Table 4 1 Device Dependent Commands Name Parameters Function ALLCOND NONE Returns the summary of all 16 channels condition bits which are further summarized in the Status Byte ALLEVE NONE Returns the summary of all 16 channels event bits which are further summarized in the Status Byte BEEP 1 Enables the beeper or beeps once BEEP NONE Returns the enable status of the beeper CHAN 1 Selects a channel or all channels for further commands CHAN NONE Returns the selected channel CHECKSUM NONE R
51. parated from the command by at least one space The syntax symbol nrf value refers to the flexible numeric representation defined by the GPIB standard It means that you can represent numbers in integer or floating point form or in engineering scientific notation The IEEE 488 2 standard uses the names NR1 NR2 and NR3 respectively to denote integer LDC 3916 31 32 LDC 3916 OPERATING IN REMOTE CONTROL Laser Diode Controller Command Set floating point and scientific notation For example the number twenty may be represented by any of the following ASCII strings Integer 20 20 NR1 Floating point 20 0 20 0 NR2 Scientific notation 2 0E 1 2 0E 1 NR3 2 0e 1 2 0e 1 For more information on these definitions refer to the IEEE 488 2 standard There are no default values for omitted parameters If a command is expecting a parameter and none is entered an error is generated 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 ON 1 OFF 0 OLD 1 NEW 0 TRUE 1 FALSE 0 SET 1 RESET 0 If multiple parameters are expected they must be separated with commas For example to set the Steinhart Hart constants C1 C2 and C3 on a TEC module in the LDC 3916372 Laser Diode Controller the following
52. r allEve response 19 means that channels 1 2 and 5 have enabled conditions Bit 0 of the Status Byte register is set Rad bin AllEve response B100001 means that channels 1 and 6 have enabled events Bit O of the Status Byte register is set iU mJx Lightwave COMMAND REFERENCE Device Dependent Command Reference BEEP REMOTE The BEEP command controls the LDC 3916 Laser Diode Controller s beeper The beeper can be used to signal error or warming conditions Parameters An lt nrf values 0 Off totally disabled 1 On enabled for normal operation and 2 beep once Notes Disabling the BEEP will prevent the audible beeper signal from working during front panel operation including calibration signals The parameter must be a numeric value 0 1 or 2 and not a character data substitute such as On or Off Examples BEEP 0 action The beeper is disabled BEEP 1 action The beeper is enabled for normal operation BEEP 2 action The beeper is beeped once BEEP ON REMOTE The BEEP query returns the enable status of the LDC 3916 Laser Diode Controller s beeper Parameters None A response of 0 Off totally disabled 1 On enabled for normal operation Notes Disabling the BEEP will prevent the audible beeper signal from working during front panel operation including calibration signals The beeper is normally enabled unless it is specifically disabled via the BEEP 0 remote command
53. rd and fourth channels displayed Figure 2 17 Status Screen page 2 The default measurements on the status menu are laser current on the first line and TE temperature on the second line These two lines may be configured to display any laser or TEC measurement by sending a GPIB command For example send the command STATMENU LINE2 IPD and the status menu will ILX Lightwave 07 15 OPERATIONS Using the LDC 3916 Menu Structure display the photo diode monitor current on the second line as well as the laser diode current on the first line See your module instruction manual for more information To exit either the Summary or Status page use the Main or Chnl key depending on your next action Modulating the Controller Laser Current Sources The LDC 3916 Laser Diode Controller allows a modulated signal to be superimposed on the Laser current of any or all current source modules The Modulation connector BNC on the back panel is the input for the modulated signal This input is terminated into 50W Modulation input Figure 2 18 LDC 3916 Controller Modulation Input Each module uses an instrumentation amplifier to buffer the modulation signal This signal may be applied to more than one module channel at a time The transfer function mA V varies by model and laser drive current output range Typically it is mA full scale 10 V Laser protection is assured even while modulating via the limit current parameter set o
54. rder Also included in this section are the descriptions of the Generic Module Commands see Figure 3 3 on page 33 Refer to the appropriate module instruction manual for details on each specific module Sub sections for each path are presented listing the commands which are legal for that path ALLCOND REMOTE The ALLCOND query returns the status summary of enabled conditions from each channel of the LDC 3916 Laser Diode Controller Parameters None The response is the sum of the following 1 Channel 1 conditions 256 Channel 9 conditions 2 Channel 2 conditions 512 Channel 10 conditions 4 Channel 3 conditions 1024 Channel 11 conditions 8 Channel 4 conditions 2048 Channel 12 conditions 16 Channel 5 conditions 4096 Channel 13 conditions 32 Channel 6 conditions 8192 Channel 14 conditions 64 Channel 7 conditions 16384 Channel 15 conditions 128 Channel 8 conditions 32768 Channel 16 conditions Notes Each channel s conditions that are summarized here represent that channel s contribution to the Status Byte Register All of the bits of the ALLCOND register are logically ORed to set or clear bit 0 of the Status Byte Register The value of the ALLCOND register is not cleared until it is read using the ALLCOND query Thus if an SRQ is generated from any of the condition bits of the ALLCOND register it is necessary to use the ALLCOND query in the user s interrupt service routine to reset the interrupt enabled
55. ssages which are resident in the error queue are returned up to 10 may be stored Reading the error queue via GPIB clears the error queue Table 3 3 Mainframe Error Code Classifications Error Code Range Area of Operation E 100 to E 199 Parser Errors E 200 to E 299 Execution Control Errors E 300 to E 399 GPIB Errors E 700 to E 799 Mainframe Errors E 900 to E 999 Mainframe to Module Communication Errors Table 3 4 Mainframe Error Codes Error Code Explanation E 124 Command not recognized by mainframe E 125 Common command not recognized by mainframe E 126 Too few or too many program data elements E 201 PROGRAM DATA Value out of range E 202 lt PROGRAM DATA gt Will not convert to valid type E 203 Security violation command is not available without clearance E 225 No modules are present E 226 Arbitrary Block data header not valid E 227 Invalid channel selection 07 15 LDC 3916 39 OPERATING IN REMOTE CONTROL Error Messages Table 3 4 Mainframe Error Codes Error Code Explanation E 228 String delimiter not found E 229 Channel All command not valid all modules in mainframe must be the same model E 301 A RESPONSE MESSAGE was ready but the controller failed to address the device to talk E 302 Device was addressed to talk but controller failed to read all of the message E 710 AC power l
56. state from On to Off If the LAS soft key is depressed the laser setup menu will be displayed Full descriptions of each menu are provided later in this chapter Adjust Controls The Adjust section of the front panel provides various means of entering or modifying instrument parameters These include a 10 key numeric keypad a rotary knob digital encoder and Up Down Arrow keys Figure 2 3 Adjust Controls Numeric Keypad The numeric keypad provides direct entry of values for set points and numeric data When an editable field is highlighted or selected from the menu screens the desired value can be typed into the keypad and then accepted by pressing the Enter key If the value entered is in error the Clear key can be used to reset the field to its previous value The keypad supports decimal entry as well as negative values for some constants and temperature set points Adjust Knob When the cursor in a menu is positioned on a parameter which can be adjusted the Adjust Knob can be used to increase or decrease the parameter values When the Adjust Knob is turned the new values are updated automatically The Adjust Knob input may be disabled under the System Configuration menu 12 LDC 3916 Mk ILX Lightwave 07 15 OPERATIONS LDC 3916 Front Panel Controls Arrow Keys The two Adjust Up Down Arrow keys also can be used to adjust values on any of the screens where a numeric value is required Holding down either of the ke
57. status reporting structures the LDC 3916 remote interface provides Event and Condition registers for module operations The ALLEVE register is used to report events which occur during the operation of the LDC 3916 and which are enabled to be passed up to the status byte The ALLEVE register contains summary bits from each of the sixteen modules 07 15 LDC 3916 3b OPERATING IN REMOTE CONTROL Status Reporting Likewise the ALLCOND register is used to report conditions which occur during the operation of the LDC 3916 and which are enabled to be passed on to the status byte The ALLCOND register contains summary bits from each of the sixteen modules The bits in the ALLCOND and ALLEVE registers are logically ORed to form a summary message in the status byte for that particular register Events are different from conditions Events signal one time occurrences and are not reset until either the corresponding module s Event Register s is queried the CLS command is issued or the LDC 3916 is powered off Conditions reflect the current state of the device and therefore may change many times during operation Figure 3 2 shows the status reporting scheme of the LDC 3916 Laser Diode Controller Operation Complete Definition Note that Bit O of the Standard Event Status register contains the status of the Operation Complete flag Enabling this bit via the ESE command allows the user to update Bit 5 of the status byte Then if the SRE
58. syntax command strings that will produce errors Table 3 2 Invalid Syntax Command Strings COMMAND COMMENT EC MODE T Missing colon MODE expected EC MODE R DEC Missing semicolon DEC command generates an error LAS DIS Space not allowed before question mark DIS command expected Las LDI33 dis Space missing between LDI command and the parameter value 33 IEEE 488 2 Common Commands 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 Numeric data is required with PSC 1 on 0 off RCL 0 to 10 see Save and Recall on page 18 SAV 1 to 10 see Save and Recall on page 18 ESE 0 to 255 see Table 3 3 on page 33 SRE 0 to 255 see Table 3 3 on page 33 and PUD used at factory only The CAL query returns 1 if all LDC 3916 modules self calibration routines are completed properly otherwise O is returned The TST query returns 1 if all LDC 3916 modules which were working at power up or at the time of the last TST query have responded to the LDC 3916 mainframe within the past 15 seconds If any modules fail to respond to the iU Jx Lightwave OPERATING IN REMOTE CONTROL Status Reporting mainframe TST will return O and those modules will no longer b
59. t Interconnect Cable CC 305S Current Source Unterminated Interconnect Cable CC 306S Laser Current Cables Bundle of 8 CC 316M TE Controller Unterminated Interconnect Cable CC 501S TE Controller Laser Diode Mount Interconnect Cable CC 505S TE Controller Cables Bundle of 8 CC 516M Low Noise Filter LNF 320 16 Channel Laser Diode Mount DIL and Butterfly available LDM 4616 Unipolar Heater Control Adapter UCA 350 LabVIEW Instrument Driver Please contact ILX Lightwave for information on additional options for your applications iU JJx Lightwave CHAPTER 2 ATIONS OPER 5 B El a Bi a El El mH E Ej El ja 5 Ej z E El This chapter introduces you to the operation of the LDC 3916 sixteen channel laser diode controller It offers instructions for connecting your laser to the current source and temperature controller modules and describes powering up the instrument The chapter also provides a description of the front panel controls including both display and adjust controls The bulk of the chapter provides a description of the LDC 3916 Menu Structure This section provides pictures of the display screen associated with each menu for the LDC 3916 Mainframe related to general operation of the instrument This section also provides instructions on how to select each menu and how to perform the operations relevant to the menu selected Applying Power to Your Laser Diode Controller To turn on the LDC 3916 push the butt
60. the LAS or TEC soft key calls up the menu for editing Laser or TEC control parameters for each of active modules For further information on this procedure see the LDC 3916370 Series Controller Module Manual The output state for each module can be changed by depressing the associated soft key Off or On which is accompanied by an audible beep if configured When either output is on the display will indicate measured laser output current and forward voltage and measured temperature thermoelectric module current and sensor resistance iU Jx Lightwave 07 15 OPERATIONS Using the LDC 3916 Menu Structure Figure 2 5 Channel Menu System Configuration The System Configuration menu is accessed from the Main menu Pressing the appropriate soft key provides access to Comm Communications Configuration menu for GPIB and RS 232 setup Display Config Display Configuration menu for interface settings Cal Calibration menu for module calibration Sav Rec Save Recall menu for system wide parameter storage and retrieval Figure 2 6 System Configuration Menu Communications Configuration If you intend to operate your LDC 3916 LD Controller remotely via GPIB General Purpose Information Bus or through a serial RS 232 link selecting Comm from the System Configuration menu accesses the Config Comm menu Here you can view and change the GPIB address and the RS 232 BAUD rate Pressing the Up Arrow soft key returns you
61. to the Sys Config menu Chapter 3 in both the Mainframe and Module manuals provides complete information on remote control operation LDC 3916 15 OPERATIONS Using the LDC 3916 Menu Structure 16 LDC 3916 G address Mi Confis Comm RS 232 Baud rate 96808 Figure 2 7 Communications Configuration Menu Display Configuration If you intend to operate your LDC 3916 LD Controller remotely via GPIB General Purpose Information Bus or through a serial RS 232 link selecting Comm from the System Configuration menu accesses the Config Comm menu Here you can view and change the GPIB address and the RS 232 BAUD rate Pressing the Up Arrow soft key returns you to the Sys Config menu Chapter 3 in both the Mainframe and Module manuals provides complete information on remote control operation Figure 2 8 Display Configuration Menu Selecting Display from the System Configuration menu accesses the Display Config menu Here you can adjust the display brightness initiate a display self test enable or disable an audible beep whenever pushbuttons are pressed and enable or disable the Adjust Knob Use the Display Up Down keys to select the desired function which will be highlighted Pressing the soft key to the right of the Arrow shown in the display window returns you to the previous menu You can adjust the display brightness in four levels A bar graph will be displayed next to the Bright enunciator One two three or
62. useful for clarity but must be in the correct sequence A single white space must separate a command from its parameters or data White space is normally the space character space bar Other control characters are also interpreted as white space Do not use white space before the question mark in a query command If you encounter problems with GPIB communications the terminator string can be the cause Refer also to your GPIB interface controller manual The instrument accepts NL or END or lt NL gt lt END gt as a command line 07 15 LDC 3916 33 OPERATING IN REMOTE CONTROL Laser Diode Controller Command Set terminator Many computers terminate with CR NL lt END gt Carriage Return New Line EOI The instrument ignores CR Carriage Return as white space The LDC 3916 terminates its responses with lt CR gt lt NL gt lt END gt unless you use the TERM command to change it You can put more than one command on the same line same command string if you separate them with a semicolon GPIB uses a flexible representation for numeric parameters integer floating point or engineering scientific notation There are no default values for omitted parameters Some device dependent GPIB commands are compound commands in which the first mnemonic opens a path to a set of commands relating to that path The second mnemonic then defines the actual command Following are examples of invalid
63. ust Knob or Adjust Up Down Arrow keys to change from off to on or on to off You must press Adjust Enter after making the desired selection to execute the change The Adjust Knob also can be enabled or disabled from this menu Once the Lockout dial function is selected the On or Off enunciator will be highlighted depending on the current state of this function Use the Adjust Knob or Adjust Up Down Arrow keys to change from off to on or on to off Press Adjust Enter after making the desired selection to execute the change Calibration The Calibration Menu allows you to calibrate from the front panel all Laser and TEC functions for each of the modules 16 max you have loaded in the LDC 3916 Mainframe Remote calibration through the IEEE488 2 GPIB or serial RS 232 interface is provided as well See Chapter 3 ILX Lightwave recommends that the instrument be calibrated every 12 months or whenever performance verification indicates that calibration is necessary such as any difference between the displayed Laser current and the actual laser current which exceeds the specified value Calibrate the instrument under laboratory conditions We recommend calibration at 23 C 1 0 C When necessary however the LDC 3916 Laser Diode Controller may be calibrated at its intended use temperature if this is within the specified operating temperature range of 0 C to 40 C 07 15 LDC 3916 17 OPERATIONS Using the LDC 3916 Menu Structure
64. ut above the LAS ILIM laser current limit setting the output will be clipped at the ILIM value 24 LDC 3916 IU Jx Lightwave CHAPTER 3 OPERATING IN REMOTE CONTROL B B Ei a El a El El Ei El El El E E a E Ei GPIB General Purpose Interface Bus is the common name for ANSI IEEE Standard 488 2 1987 an industry standard for interconnecting test instruments in a system Everything you can do from the front panel can also be done remotely and in some cases with more flexibility For instance in remote mode you have access to commands for functions not found on the front panel The following sections show you the fundamentals of operating your LDC 3916 Laser Diode Controller remotely through the GPIB and RS 232 interfaces GPIB Configuration Before you can operate the LDC 3916 from a remote location with GPIB you need to know its GPIB address The following sections describe reading and changing the GPIB address of the LDC 3916 Data and Interface Messages GPIB devices communicate with each other by sending data and interface messages Data contains device specific information such as programming instructions measurement results and instrument status Each device has an address number and ignores all data traffic not addressed to it Depending on its content data is often called a device dependent message or a device dependent command Interface messages manage the bus with functions such as initializing the bus and ad
65. ut the LDC 3916 s mainframe command set command syntax and error and status registers For the most efficient and effective remote control of your controller we recommend you study the following sections For module specific commands refer to the GPIB section of the instruction manual for that module Command Syntax This section describes command syntax and structure You need this information to effectively write GPIB control programs The syntax of GPIB commands follow the rules difined in the ANSI IEEE 488 2 1987 standard Letters Any GPIB command or query must contain all of the letters which are shown in upper case in the command definition Some of the device dependent commands include additional optional letters shown in lower case in the command reference Chapter 4 Command Reference Upper lower case does not matter it is used in this manual to identify optional letters The optional letters must be in the correct sequence Some examples of what works and what does not Okay Not Okay DIS DS Disp dsp Displ dply Displa DSPLY Display disply White Space White space is normally the space character space bar A single white space must separate a command from its parameters or data For example Okay Not Okay DELAY 500 DELAY500 To enhance readability you can also use one or more white spaces before a comma semicolon or terminator Since your computer
66. w soft key to display the All TEC Set p 2 menu Highlight Gain with the Adjust Knob or Display Up Down Arrow keys and set the gain to 30 with the Adjust keypad Adjust Knob or Adjust Up Down Arrow keys Arrow down to the Sensor field and change the field to 100 uA Check for the proper sensor constant values and adjust if necessary When the desired fields are set correctly use the Display Up Arrow soft key to get back to the All TEC p 1 menu and turn on all 16 channel Mk ILX Lightwave 07 15 OPERATIONS Using the LDC 3916 Menu Structure outputs with the On soft key Now all channels are controlling the temperature of your laser to 25 C Figure 2 14 All TEC Menu page 2 Status Menu The Status menu provides summary information on individual module status There are two status pages to choose from The Summary status page lists all channels up to sixteen present in the mainframe and the condition of the output on a single screen The Status page lists four channels at a time up to a total of sixteen This page indicates the LAS measured current the TEC measured temperature if the either of the outputs is active LAS TEC and any errors respective to a channel The Up Arrow returns you to the Main menu Eunnaru fa Figure 2 15 Status Menu Summary Pressing the Summary soft key while in the Status menu displays the Summary page Next to each channel number are the words LAS and TEC if you have 3916370 Series Modules inst
67. which can result in minor or moderate injury or damage to the product or equipment AY warning Warning indicates a potentially dangerous situation which can result in serious injury or death 24 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 e 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 x 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 ix for more information iit ILX Lightwave LDC 3916 vii Ld ob 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 onl
68. y Ordinary Protection This product is NOT protected against the harmful ingress of moisture Class Equipment grounded type Pollution Degree Il Installation overvoltage Category Il for transient overvoltages Maximum Relative Humidity 8096 RH non condensing Operating temperature range of 0 C to 40 C Storage and transportation temperature of 40 C to 70 C e 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 Caution L Earth refer to ground manual Terminal Visible and or invisible laser radiation Alternating current Caution risk Protective of electric Conductor shock Terminal On In position of a bistable push control The or slash lI only denotes that mains are on I Caution hot Pid surface Terminal Off Out position of a bistable push control or The circle O only denotes that mains are off O viii LDC 3916 iU qJ Lightwave WARRANTY 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 peri
69. ys will increase or decrease the number via a simple time based acceleration algorithm When the Arrow keys are pressed the new values are updated automatically LDC 3916 13 14 OPERATIONS Using the LDC 3916 Menu Structure Using the LDC 3916 Menu Structure LDC 3916 This section describes the menus how they are structured and how to navigate through them Main Menu Once you have pressed the Main key the following screen appears This is the primary set up and configuration screen for the instrument Pressing the soft keys to the right of the display leads to Channel selection System configuration All Channel control features and system Status displays It also allows a soft key path directly back to the Channel menu Main Menu Figure 2 4 Main Menu Channel Menu Pressing the Chnl key allows you to jump directly to the default Channel menu Shown here is the Channel display for a typical combination LAS and TEC module The Channel menu provides standard user information along with soft key assignments for configuring the module further or for turning the output On Off Initially the cursor waits at the channel number indicator The channel number can be changed either by entering the desired channel number from the keypad rotating the Adjust Knob or by using the Up Down Arrow keys in the Adjust section of the front panel Pressing the Enter key causes the display to change to the selected channel Pressing

LDC-3916 16-Channel Laser Diode Controller

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