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O P E R A T I O N S

Using the LDC-3908 Menu Structure

03_02

LDC-3908

11

C H A P T E R

2

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configured). When either output is on, the display will indicate measured laser output current, LD
forward voltage, measured temperature, thermoelectric module current, and sensor resistance.

Figure 2.5

Channel Menu

System Configuration

The System Config. (System Configuration) menu is accessed from the Main menu. Pressing the
appropriate soft key provides access to:

•

Communications Configuration (Comm.) menu for GPIB and RS-232 setup

•

Display Configuration menu for interface settings

•

Calibration (Cal.) menu for module calibration

•

Save/Recall (Sav/Rec) menu for system-wide parameter storage and retrieval

Figure 2.6

System Configuration Menu

Communications Configuration

If you intend to operate your LDC-3908 LD Controller remotely via GPIB (General Purpose Interface
Bus) or through a serial RS-232 link, selecting Comm from the System Config. menu accesses the
Config. Comm menu. Here you can view and change the GPIB address and the RS-232 BAUD rate.

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Содержание LDC-3908

Страница 1: ...rutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective owner...

Страница 2: ...n P O Box 6310 Bozeman MT U S A 59771 1 800 459 9459 www ilxlightwave com U S Canada International Inquiries 406 586 1244 Fax 406 586 9405 E mail support ilxlightwave com 70031301 00_03 02 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 3: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 4: ...n Instrument xi Claims for Shipping Damage xi Comments Suggestions and Problems xii Chapter 1 Introduction and Specifications Product Overview 1 Initial Inspection 2 Installing Your LDC 3908 Laser Diode Controller 2 Grounding Requirements 2 AC Line Power Requirements 2 RS 232 Connectors 2 GPIB Connector 3 GPIB Address 3 Tilt Foot Adjustment 3 Rack Mounting 3 Artisan Technology Group Quality Instru...

Страница 5: ...oller 9 The Power On Sequence 9 The Power On State 9 Using the LDC 3908 Menu Structure 10 Main Menu 10 Channel Menu 10 System Configuration 11 Communications Configuration 11 Display Configuration 12 Calibration 13 Save and Recall 13 All Channel Menu 14 Setting All LAS 15 Setting All TEC 15 All TEC Page 1 15 All TEC Page 2 16 Status Menu 16 Mainframe Errors 17 Summary Menu 17 Status Page 2 18 Arti...

Страница 6: ...de Controller Command Set 21 Command Syntax 21 IEEE 488 2 Common Commands 22 LDC 3908 Mainframe Specific Commands 23 Status Reporting 23 Event and Condition Registers 23 Operation Complete Definition 24 Error Messages 25 Chapter 4 Command Reference LDC 3908 Mainframe Command Reference 29 Chapter 5 Functions and Features Saving and Recalling from the Front Panel 39 Modulating the Controller Laser C...

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Страница 8: ... Menu 13 Figure 2 9 Calibration Screen 13 Figure 2 10 Save Recall Configuration Screen 14 Figure 2 11 All Channel Menu 15 Figure 2 12 All LAS Menu 15 Figure 2 13 All TEC Page 1 Screen 16 Figure 2 14 All TEC Page 2 Menu 16 Figure 2 15 Status Menu 17 Figure 2 16 Mainframe Errors Menu 17 Figure 2 17 Summary Menu 18 Figure 2 18 Status Page 2 Menu 18 Figure 3 1 LDC 3908 Status Reporting Schematic Diagr...

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Страница 10: ...ons 6 Table 3 1 Substitute Parameter Names 22 Table 3 2 LCD 3908 Mainframe Error Code Classifications 25 Table 3 3 LDC 3908 Mainframe Error Message Codes 25 Table 4 1 LDC 3908 Mainframe Device Dependent Commands 27 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 11: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 12: ...esult in serious injury or death WARNING Visible and or invisible laser radiation Avoid direct exposure to the beam General Safety Considerations If any of the following conditions exist or are even suspected do not use the instrument until safe operation can be verified by trained service personnel Visible damage Severe transport stress Prolonged storage under adverse conditions Failure to perfor...

Страница 13: ...ng Operating temperature range of 0 C to 40 C Storage and transportation temperature of 40 C to 70 C Maximum altitude 3000 m 9843 ft This equipment is suitable for continuous operation Safety Marking Symbols This section provides a description of the safety marking symbols that appear on the instrument These symbols provide information about potentially dangerous situations which can result in dea...

Страница 14: ...ear 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 m...

Страница 15: ... information If ILX Lightwave determines that a return to the factory is necessary you are issued a Return Authorization RA number Please mark this number on the outside of the shipping box You or your shipping service are responsible for any shipping damage when returning the instrument to ILX Lightwave ILX recommends you insure the shipment If the original shipping container is not available pla...

Страница 16: ...s Failure to perform intended measurements or functions If necessary return the instrument to ILX Lightwave for service and repair to ensure that safety features are maintained Product Overview The LDC 3908 Laser Diode Controller is an instrument that holds up to 8 modules for controlling laser diode current and temperature The current source modules provide high stability output with fully redund...

Страница 17: ... can operate the LDC 3908 Controller from a single phase power source delivering nominal line voltages of 100 120 220 or 240 VAC all values RMS at 48 to 66 Hz The line power voltage can vary 10 to 6 but cannot exceed 250 VAC Maximum power consumption is 1750 Volt Amps with 8 modules LDC 3916376 1 5A 9W Controller modules The instrument s operational voltage setting is factory configurable and need...

Страница 18: ... found in Changing the GPIB Address on page 19 Tilt Foot Adjustment The LDC 3908 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...

Страница 19: ...to Chapter 2 for operating fundamentals of your controller Figure 1 1 LDC 3908 Controller Front View Vacuum Fluorescent Display Numeric Keypad Adjust Knob Parameter Adjust Keys Menu Control Hard Keys Menu Soft Keys F1 F2 F3 F4 Laser Enable Key Switch Power Switch Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 20: ... Diode Controller circuit boards High voltages are present on and around the Controller s printed circuit boards Fuse Replacement The LDC 3908 Controller has a line power fuse located on the rear panel inside the power input module to the right of the power cord connector Before replacing the fuses turn power off and disconnect the power cord With a small flat blade screwdriver gently pry up the f...

Страница 21: ... Blo Table 1 2 General LDC 3908 Specifications Specification Description Connectors External Modulation Connector BNC instrumentation amplifier input RS 232 Interface Input Output 9 pin D connector female 9 pin D connector male INACTIVE GPIB Interface Meets ANSI IEEE Std 488 1 1987 Meets ANSI IEEE Std 488 2 1987 General Size H x W x D Weight with 8 modules Power Requirements Temperature Humidity D...

Страница 22: ...r and Thermoelectric Module control is provided in the various Module Manuals This section also provides instructions on how to select each menu and how to perform the operations relevant to the menu selected LDC 3908 Front Panel Controls 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 mo...

Страница 23: ...s menu will appear on the right hand side of the display next to the corresponding key Soft keys may be used to initiate another menu or to change edit a parameter For example in the LAS section of the Channel menu the word on designates the state of the output Depressing the associated soft key will change the state from On to Off If the LAS soft key is depressed the laser set up menu will be dis...

Страница 24: ...e 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 3908 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 perfor...

Страница 25: ...he right of the display leads to Channel selection System configuration All Channel control features and system Status displays The Channel selection is a soft key path directly back to the Channel menu Figure 2 4 Main Menu Channel Menu Pressing the Chan key allows you to jump directly to the Channel Menu Shown here is the Channel display for a typical combination LAS and TEC module The Channel me...

Страница 26: ...ions Configuration Comm menu for GPIB and RS 232 setup Display Configuration menu for interface settings Calibration Cal menu for module calibration Save Recall Sav Rec menu for system wide parameter storage and retrieval Figure 2 6 System Configuration Menu Communications Configuration If you intend to operate your LDC 3908 LD Controller remotely via GPIB General Purpose Interface Bus or through ...

Страница 27: ...in this menu to execute the change in display brightness If you think there may be a problem with the graphic display a display self test can be initiated from this menu After selecting the Display Test function using the Prev Next keys use either the Adjust Knob or the Adjust INC DEC keys to display the word Yes Then depress Adjust Enter in the section to activate the test The display will be ins...

Страница 28: ... value Calibrate the instrument under laboratory conditions We recommend calibration at 23o C 1 0o C When necessary however the LDC 3908 Laser Diode Controller modules may be calibrated at their intended use temperature if this is within the specified operating temperature range of 0 to 40o C For specific calibration information see the Service Reference section of your module instruction manual F...

Страница 29: ...ult settings 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 Figure 2 10 Save Recall Configuration Screen All Channel Menu The All Channel menu offers a unique and quick way to set up all 8 channels of the instrument or any number o...

Страница 30: ...mit to 80 mA as described above Move down to Vlim and set the laser protection forward voltage limit to 3 1V Again move down to Mode and using the Adjust Knob or Adjust INC DEC keys select Ilbw for Low bandwidth mode i e lowest noise mode After the desired fields are set correctly you can turn on all 8 channel outputs with the On soft key If your lasers have TE coolers you should set the TEC contr...

Страница 31: ...ues and adjust if necessary When the desired fields are set correctly use the Display Up Arrow key to get back to the All TEC p 1 menu You can turn on all 8 channel TEC controllers with the On key Figure 2 14 All TEC Page 2 Menu Status Menu The Status menu provides summary information on individual module and mainframe status There are three status pages to choose from The Summary MF errors page l...

Страница 32: ...Status menu displays the Mainframe Errors page If any mainframe errors have been detected the appropriate error code will be displayed Table 3 2 on page 25 for a list of possible errors and their meanings Figure 2 16 Mainframe Errors Menu Summary Menu 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 3...

Страница 33: ... to the laser current setpoint Adjust the setpoint with either the knob or the number pad Press the top soft key a second time and the second line will change from the temperature measurement to the temperature 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 knob or by pressing INC DEC keys Press the soft key again and...

Страница 34: ...the front panel to recall the Main Menu 2 Press the Sys Config soft key to reach the System Configuration menu 3 Press the Comm soft key to access the Config Comm menu The mainframe displays the GPIB Address on the Config Comm menu Changing the GPIB Address Every device on the GPIB bus must have a unique address The default address from the factory is address 01 1 Press Main from the front panel t...

Страница 35: ...the serial port configuration of your PC if used for the appropriate baud rate Remote Communication The following sections describe some of the issues regarding Remote operation Before remote communications are initiated be sure to configure the GPIB or RS 232 as described above Changing Operation from Local to Remote Sending a command over the GPIB or RS 232 interface will automatically put the i...

Страница 36: ...3908 Command Path Structure Figure 3 1 However the Controller s command parser is NOT CASE SENSITIVE so any combination of upper or lower case letters may be used The lower case letters shown with the Device Dependent commands in Chapter 4 are optional letters and may be used for clarity For example the following commands are equivalent CHAN 1 Chann 1 channel 1 In this example only the first four ...

Страница 37: ...tion manual 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 15 SAV 1 to 10 see Save and Recall on page 15 ESE ...

Страница 38: ...ng 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 status reporting structures the LDC 3908 remote interface provides Event and Condition registers for module operations The ALLEVE register is used to report events that occur during the operation of the LDC 3908 ...

Страница 39: ...B 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 SRQ programming setup LOGICAL OR ALLCOND Condition Status Summary Register LOGICAL OR Standard Event Status Enable Register ESE ESE Service Request Enable Register SRE SRE LOGICAL OR 0 Operation Complete 1 Request Cont...

Страница 40: ...10 may be stored Reading the error queue via GPIB clears the error queue Table 3 2 LCD 3908 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 3 LDC 3908 Mainframe Error Message Codes Err...

Страница 41: ...y E 9xx Internal communications warnings 1 E 301 can occur if the controller the host computer attempts to read a query response after sending a command 2 E 302 can occur if the controller sends a query but sends a command before reading the query response Table 3 3 LDC 3908 Mainframe Error Message Codes Error Code Explanation Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOUR...

Страница 42: ...N 1 Selects a channel or all channels for further commands CHAN NONE Returns the selected channel CHECKSUM NONE Returns a value which is the checksum of the 3908 setup parameters DELAY 1 Used to create a delay in the execution of further commands ERR NONE Returns errors generated since the last query MENU 1 Selects a menu for the front panel display MES 1 Enters a string message of up to 16 bits M...

Страница 43: ...tatus of the TERM command TIME NONE Returns the elapsed time since the instrument was last powered up TIMER NONE Returns the elapsed time since the timer was last reset Table 4 1 LDC 3908 Mainframe Device Dependent Commands NAME PARAMETERS FUNCTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 44: ...t Panel A solid box means the command can be executed in that mode Command mnemonics in front panel local mode may vary Command Description Syntax Diagram For Remote Commands Parameters Tells what parameters are expected and their type An nrf value refers to a flexible numeric notation IEEE 488 2 Integer exponential or floating point may be used with the decimal radix Alternate radices may be sele...

Страница 45: ...ce routine to reset the interrupt enabled 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 0 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 ...

Страница 46: ... 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 7 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 Examples ALLEVE response 0 means that no channels have any enabled events to pass to the Status B...

Страница 47: ... the front panel display remotely see Menu command If an invalid missing module is selected an E227 error will be generated and the channel selection 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 C...

Страница 48: ...cuted Tec T 22 Delay 2000 Tec T actions The TEC is set to 22 0 C then the LDC 3908 Laser Diode Controller waits for about 2 0 seconds before measuring and returning the temperature 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 t...

Страница 49: ... 3 action The string Test 3 will be stored in non volatile memory 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 the character string that was entered using the MESsage command Examples MES response Test 3 means the previously stored message was T...

Страница 50: ...mainframe and viewing the serial number information on the side of the module Examples MODPUD response 221037200020011120498grb 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 Parameters Character program data is expected as shown above Notes DECimal is the default type Only the fir...

Страница 51: ...s 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 3908 is powered off Examples Scr 1 action Enables the auto scrolling feature of the Status screen SCROL 0 action Disables the auto scrolling feature of the Status screen The SCRoll query allows the programmer to determine the statu...

Страница 52: ...means that the NL END terminator IEEE 488 2 standard is being used The TIME query allows the programmer to determine how much time has passed since the LDC 3908 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 ...

Страница 53: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 54: ...or for tests which are periodically repeated To access the Save Recall mode select SAV REC from the System Configuration menu To save the existing settings of the LDC 3908 all settings on all channels will be saved select the bin for saving Then press the Save soft key To recall a previously saved instrument set up first select the recall bin Then press the Recall soft key A checksum from each mod...

Страница 55: ...de constant current low high bandwidth See the section Laser Current Source Specifications in Chapter 1 of the appropriate module s 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 a...

Страница 56: ...nications configuration menu 11 connector modulation 6 RS 232 2 6 connectors GPIB 3 controller specific commands 23 controls adjust 8 adjust knob 9 display 7 front panel 7 keypad 8 customer service contact information xii D default GPIB address 19 settings 14 definition operation complete 24 device dependent commands 27 dimensions 6 display controls 7 display menu 12 E error messages 25 errors 17 ...

Страница 57: ...7 system configuration 11 menus 10 modulation 40 mounting rack 3 O operation complete definition 24 P power 6 power on sequence 9 power on sequence 9 power on state 9 R rack mounting 3 rear panal 5 recall and save 39 recall and save menu 13 registers condition 23 event 23 remote communication 20 RS 232 connectors 6 RS 232 communication 21 RS 232 configuration 20 RS 232 connector 2 S save and recal...

Страница 58: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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