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R E M O T E O P E R A T I O N

Basic GPIB Concepts

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MPS-8033

C H A P T E R

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Basic GPIB Concepts

The information in this basic concepts discussion is normally not necessary to successfully operate
the MPS−8033 through its GPIB interface, because your computer’s GPIB controller usually handles
them for you. However this is a useful perspective in understanding GPIB.

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 addressing 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.
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.

Figure 3.1

GPIB Cable Connections

Device A

Device B

Device C

Device D

Device A

Device B

Device C

Device D

linear configuration

star configuration

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Summary of Contents for MPS-8033 Series

Page 1: ...derutilized 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 own...

Page 2: ...ration 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 700352_7 01 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

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Page 4: ...hipping Damage xiii Comments Suggestions and Problems xiv Chapter 1 Introduction and Specifications Product Overview 1 MPS 8033 Precision Fiber Optic Sources 1 MPS 8033 Broadband 1550 nm ASE Fiber Optic Sources 1 Safety Considerations 2 Available Options and Accessories 3 MPS 8033 Precision Source Specifications 4 MPS 8033 Broadband Source Specifications 4 General MPS 8033 Series Specifications 5 ...

Page 5: ...tion 12 Linear mW display 13 Log dBm display 13 Relative Log dB display 13 Error Display 13 Back Panel Controls and Connections 14 TTL OUT Connector 14 GPIB Connector 14 AC Power Entry Module and Fuse 14 General Operating Procedures 15 Warm Up and Environmental Considerations 15 CW or Pulse Mode Operation 15 Calibration Operation 15 Set Reference Operation 16 TRIGGER OUT Operation 16 Chapter 3 Rem...

Page 6: ...ter Pair 27 Event Status Register Contents 28 Standard Event Status Register 29 Status Byte and Service Request Enable Register 30 Device Dependent Event and Condition Registers 30 Operation Complete Definition 30 ANSI IEEE 488 2 Definitions 31 Power on Conditions 31 Default Parameters 31 Advanced Programming 32 Error Messages 33 Command Timing 33 Sequential Overlapped Commands 33 Query Response T...

Page 7: ...enance Calibration Overview 76 Recommended Equipment 76 Environmental Conditions 76 Warm Up 76 Calibration Accuracy 76 Local Operation Optical Power Calibration 77 Calibrating from the Front Panel 77 Remote Operation Optical Power Calibration 78 Calibrating through the GPIB 78 Recalling the Factory Calibration 79 Cleaning the Internal Fiber Optic Connector 79 Fuse Replacement 80 Line Voltage Selec...

Page 8: ...on 88 Power on Conditions 88 More Information 88 Appendix C GPIB System Controller Configuration Configuring the National Instruments NI 488 2 GPIB Controller 89 GPIB Termination Characters 89 Index Index i Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

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Page 10: ... 2 4 GPIB Section 12 Figure 2 5 Display and Adjust Sections 13 Figure 2 6 Back Panel 14 Figure 3 1 GPIB Cable Connections 18 Figure 3 2 GPIB Connector Diagram 19 Figure 3 3 Command Path Structure 24 Figure 3 4 8033 Output Off Register 34 Figure 4 1 8033 Command Path Structure 41 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

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Page 12: ... Strings 25 Table 3 5 State of the 8033 after RST 31 Table 3 6 8033 Allowable GPIB Interface Messages 35 Table 3 7 Non Supported Interface Messages for the 8033 35 Table 4 1 Command Reference 39 Table 5 1 Recommended Test Equipment for Calibration 76 Table 5 2 Fuse Replacement 80 Table 6 1 Hardware Troubleshooting 81 Table A 1 Error Code Classifications 84 Table A 2 Error Code Descriptions 84 Arti...

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Page 14: ...mbols are similar to the safety marking symbols described on page xii and are used in conjunction with the safety symbols that appear on the instrument See page xii for a complete description of these safety symbols 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...

Page 15: ...perating temperature range of 0 C to 40 C Storage and transportation temperature of 40 C to 70 C Maximum altitude 3000 m 9843 ft This equipment is suitable for continuous operation Safety Marking Symbols This section provides a description of the safety marking symbols that appear on the instrument These symbols provide information about potentially dangerous situations which can result in death i...

Page 16: ... 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 band...

Page 17: ...es 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 place your instrument in a container with...

Page 18: ...ons These include active and passive component testing for high precision IL and ORL measurements environmental testing and power meter and detector calibration Instrument features include user adjustable light power output and internal modulation frequencies selected via front panel or remotely High output stability for all options is achieved by using ILX Lightwave s proven laser diode current a...

Page 19: ...siderations This is a Class 1 Laser Product Safety considerations are provided throughout this manual These must be complied with to ensure safe operation of the MPS 8033 Please read the warnings and cautions provided before operating the 8033 WARNING Laser Radiation is not visible to the human eye but can seriously damage eyesight Never look into the end of an optical cable attached to the optica...

Page 20: ... 980 nm Fabry Perot 1 mW laser option 05 1480 nm Fabry Perot 1 mW laser option 06 850 nm Fabry Perot multi mode 1 mW laser option C1 C Band 1527 98 1564 26 nm DFB laser option 10 mW C2 C Band 1527 98 1564 26 nm DFB laser option 20 mW L1 L Band 1564 26 1610 06 nm DFB laser option 10 mW L2 L Band 1564 26 1610 06 nm DFB laser option 20 mW 55 1550 nm ASE source option 10 mW 65 1550 nm ASE source optio...

Page 21: ... 0 C after one hour warm up with output on 0 030 dB Thermal Stability4 4 Over entire operating temperature range 0 C to 50 C 0 2 dB Optical Connector FC APC Fiber Type5 5 Option 06 850 nm is multi mode SMF MODULATION Type Internal digital Frequency 270 Hz 1 kHz 2 kHz front panel selectable 160 Hz 15 kHz GPIB selectable only Frequency Accuracy 0 01 Duty Cycle 50 2 Edge Jitter 0 01 OUTPUT Center Wav...

Page 22: ...dBm GENERAL Line Voltage 90 to 105 VAC 105 to 125 VAC 210 to 230 VAC 220 to 250 VAC Operating Temperature 0 C to 50 C Humidity 90 relative humidity non condensing Storage Temperature 40 C to 70 C Warm Up 1 hour Weight 4 7 kg 10 3 lbs DFB and FP sources 5 kg 10 5 lbs ASE broadband sources Size HxWxD 3 5 in x 8 4 in x 10 6 in 88 mm x 212 mm x 269 mm Remote Interface GPIB Standard Artisan Technology ...

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Page 24: ...ly with these precautions could result in severe injury or death These warnings also apply to the service and repair of the instrument The MPS 8033 is a Class 1 Laser Product Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure Do not enable the laser when there is no fiber attached to the optical output connector ...

Page 25: ...Mounting The MPS 8033 may be rack mounted by installing a rack mount flange on each side of the enclosure The rack mount accessory kits contain detailed mounting instructions Refer to Table 1 2 on page 3 for applicable rack mount accessory part numbers Power Up Sequence Connect the MPS 8033 to an AC power source Turn the KEYLOCK switch clockwise to the ON position to supply power to the instrument...

Page 26: ...r easy identification General Functions The POWER KEYLOCK switch is used to supply AC Power to the MPS 8033 The ADJUST KNOB is used for entering values such as the output power calibration values or setting the GPIB address To the left of the adjust knob are the display switches The DISPLAY MODE switch changes the display units between 1 linear milliwatts 2 log relative to one mW dBm and 3 relativ...

Page 27: ... select Continuous Wave operation When CW mode is selected the corresponding LED becomes lit and all modulation is disabled To switch from CW to pulse modulation the INT MODULATION switch must be pressed The first execution of the INT MODULATION switch will return modulation to the last selected frequency Subsequent executions of the INT MODULATION switch will sequentially cycle through the availa...

Page 28: ...s as described below LOCAL control The LOCAL ADR switch is used for several functions When the 8033 is in REMOTE all front panel controls are disabled except LOCAL ADR Press the LOCAL ADR switch to return the device to LOCAL control thus re enabling the front panel If the Local Lockout state has been activated by the host computer even the LOCAL ADR switch is disabled In this case the host compute...

Page 29: ... to select the desired GPIB address 4 Release the SET REFERENCE switch to set the address into memory Figure 2 4 GPIB Section ADJUST Section The ADJUST section is located on the right side of the 8033 front panel The ADJUST knob is used to change the light output power enter instrument calibration data or set the GPIB address Clockwise rotation of the knob increases the parameter value DISPLAY Sec...

Page 30: ...FERENCE switch sets the reference point to the current output power value and changes the display to the dB mode To view the reference power select the dB display mode and adjust the knob until the display denotes 0 00 dB Then change the display mode to mW or dBm to view the reference Error Display Execution and command errors are indicated on the seven segment display Errors are shown as Exxx whe...

Page 31: ...used to indicate output on GPIB Connector The GPIB connector is located at the top center of the back panel The 8033 GPIB connector meets IEEE 488 1 specifications The interface specifications are listed in Table 3 1 on page 17 AC Power Entry Module and Fuse The AC Power Entry Module and fuse are located at the right side of the 8033 s back panel The 8033 must be connected to a properly rated AC s...

Page 32: ...ameters to the state prior to the last power down The optical output power setting is indicated by the seven segment display with the corresponding enunciator in the display section of the front panel indicating which display mode mW dBm or dB is selected 3 Connect the fiber optic patch cord to the front panel output connector 4 Select the mode CW or INT MODULATION by pressing the appropriate mode...

Page 33: ...The reference power will be held in memory until a new reference is chosen 4 To view the reference power select the dB display mode and adjust the knob until the display indicates 0 00 dB Then change the display mode to mW or dBm to view the reference Alternatively the reference level may be calculated by subtracting the display value in dB from the display value in dBm TRIGGER OUT Operation The T...

Page 34: ...ble via GPIB whereas only four digits are shown on the front panel The MPS 8033 with the optional model 1231 complies with the IEEE 488 2 1987 standard to the extent shown in Table 3 1 Table 3 1 IEEE 488 Interface Specification GPIB Capability SH1 Source Handshake complete compatibility AH1 Acceptor Handshake complete capability T6 Talker Functions L4 Listener Functions SR1 Service Request complet...

Page 35: ...s 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 ...

Page 36: ...s are stable and available for the receiving device s to accept 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 device dependent 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 con...

Page 37: ...ow to use it for instrument control You should also be familiar with front panel operation of the MPS 8033 Manual Local operation of the 8033 is detailed in Chapter 2 Local Operation Changing Operation from Local to Remote When the 8033 is in REMOTE all front panel controls are disabled except LOCAL ADR Press the LOCAL ADR switch to return the device to LOCAL control thus re enabling the front pan...

Page 38: ...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 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 To enhance readability you can also use one or more ...

Page 39: ...rate them with a semicolon The semicolon can be preceded by one or more spaces Examples MODE DBM LASER POW 3 0 DBM DIS ON las mod freq Parameters Some commands require a parameter The parameter must be separated 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 int...

Page 40: ...acters following decimal data as a suffix without regard to upper lower case Default unit For more information on these definitions refer to the IEEE 488 2 standard Some commands expect a parameter For example if the output power is to be entered the command could be LAS POW 5 This would set the 8033 s output power to 500 mW If a single parameter is expected it should follow the command with at le...

Page 41: ...ace 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 NL END as a command line terminator Many compute...

Page 42: ...mnemonic then defines the actual command Following are examples of invalid syntax command strings that will produce errors Table 3 4 Invalid Syntax Command Strings COMMAND COMMENT MODE WATT Missing colon between program headers MODE DBM LAS DEC Missing semicolon between commands DIS Space not allowed before question mark LAS POW 777MW Space missing between the program data and the suffix unit Disp...

Page 43: ...EE 488 2 standard The status byte contains the summary of the other registers as well as reporting if the error and message available queues are active Each register has an ENABLE register associated with it The enable register works like a mask or filter when updating that register s contents to the Status Byte For example the Condition Register is filtered logically ANDed with the Condition ENAB...

Page 44: ...ay change often Querying the Condition Status Register does NOT change its contents Related commands See Chapter 4 Command Reference for details COND Query the contents of the Condition Status Register ENABle COND nrf Set an enable mask in the Condition Status Enable Register ENABle COND Query the Condition Status Enable Register mask settings 0 Output On 4 N A 8 N A 12 Calculation Error 1 Interlo...

Page 45: ...e Event Status Register resets its contents to zeros Related commands See Chapter 4 Command Reference for details EVEnt Query the contents of the Event Status Register ENABle EVEnt nrf Set an enable mask in the Event Status Enable Register ENABle EVEnt Query the Event Status Enable Register mask settings 0 Output Change 4 N A 8 N A 12 Calculation Error 1 Interlock Disabled 5 N A 9 N A 13 Hardware ...

Page 46: ...uest SRQ when current operations are completed before making a measurement To generate an operation complete SRQ follow this sequence ESE 1 Enable bit 0 of the Standard Event Status Enable Register SRE 32 Enable bit 5 of the Service Request Enable Register OPC Set bit 0 in the Event Status Register when all pending overlapped commands have been completed Related commands See Chapter 4 Command Refe...

Page 47: ...te that bit 0 of the Standard Event Status Register contains the Operation Complete flag This bit may be used to signal an SRQ to the controlling software for more efficient interrupt driven software Enable the SRQ by setting bit 0 in the Standard Event Status Enable Register ESE and bit 5 in the Service Request Enable Register SRE This may be used to initiate service request routines which depend...

Page 48: ...ions may be recalled by using the RST command Default Parameters Except for suffixes there are no default values for omitted parameters If a command is expecting a parameter and none is entered an error is generated If a suffix is omitted the default suffix is assumed However if a reset is performed via a RST command the following parameters are set to the default state shown in Table 3 5 Table 3 ...

Page 49: ...path so the internal software looks for COND at the next higher level root level in this case The 8033 will proceed up the command tree looking for a command until it reaches the root level An error is generated if the command cannot be found Care must be taken to avoid errors which are caused by trying to implement commands from the wrong path or level For example the following command string is ...

Page 50: ...nt 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 c...

Page 51: ...l unless the GPIB controller takes a long time to request the response Output Off Register The Output Off Enable Register allows the user to determine which conditions and events cause the laser OUTPUT to be turned off This register is configured in a manner which is similar to the status reporting register However it s output is not reported in the Status Byte Register Rather it goes to the hardw...

Page 52: ... chapter are handled by the Texas Instruments 9914 GPIB interface IC and the 80C188 microprocessor in the 8033 and are transparent to the higher level commands However they may be explicitly used in some GPIB programs A list of the 8033 s allowable interface messages is shown in Table 3 6 Remote Messages The following list contains GPIB remote messages which are compatible with the 8033 GPIB drive...

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Page 54: ...hite space refers to ASCII characters such as Space Bar which are used as specific separators in the command syntax nrf value refers to the IEEE 488 2 standard for numeric format notation It is a generic label which means either integer floating point scientific notation number representation may be used suffix refers to the IEEE 488 2 standard for suffixes Legal suffixes used to command the MPS 8...

Page 55: ...ommand structure is similar to a directory path structure as found in DOS For example commands which deal with the 8033 s laser output have the path LAS as in the following command to set the laser power LAS POW 500 MW The command structure is illustrated in Figure 4 1 on page 41 Table 4 1 on page 39 lists all of the 8033 s commands with the full path shown for each command and a brief explanation...

Page 56: ... Conditions ENAB COND NONE Returns the value of the Conditions enable register ENAB EVE 1 Sets the enable register for Events ENAB EVE NONE Returns the value of the Event enable register ENAB OUTOFF 1 Sets the enable register for Conditions Events which turn the OUTPUT off ENAB OUTOFF NONE Returns the value of the Outoff enable register ERR NONE Returns errors generated since the last query ESE Us...

Page 57: ...s Output Queue when all pending operations have been finished PRE Sets the parallel poll register enable bits PRE Determine the contents of the PARALLEL POLL ENABLE REGISTER PSC Used to avoid any undesirable service requests when the 8033 is powered up PSC Queries the 8033 s power on status clear flag PUD Stores data unique to the 8033 PUD Retrieves the contents of the PUD storage area RST Perform...

Page 58: ...ath notation Once familiar with the paths shortcuts are available These shortcuts are described in Section 3 6 Figure 4 1 8033 Command Path Structure root CAL CLS ESE ESE IDN OPC OPC PRE PRE IST PSC PSC PUD PUD RST SRE SRE STB TST WAI DIS DIS ERR EVE MES MES MODE SECURE TERM TERM TIME TIMER COND USER1 USER2 START DB DBM DBM W W DB COND EVE EVE OUTOFF OUTOFF COND INC MOD OUT OUT POW POW REF REF STE...

Page 59: ...use of LASER POWER for clarity Command Types Command types are indicated in the descriptions by these check boxes Common commands and requests are defined by GPIB standards and have consistent meanings for various instruments Common commands start with For example IDN is a GPIB common query asking the instrument to identify itself For more information on GPIB common commands refer to an ANSI IEEE ...

Page 60: ... to the default calibration values A user calibration is recommended after this command is executed This command is available via the GPIB only Examples CAL RECALL The CAL START command will cause the 8033 to begin the three point calibration procedure Parameters None Notes This command will initiate the laser output power calibration The device will be forced to CW mode milliwatt display and the ...

Page 61: ...y This command must follow the CAL START and CAL USER1 commands and should not be used until the desired power level is achieved The proper test equipment should be set up in order for these commands to work Calibration is discussed in Chapter 6 Examples CAL USER2 The CAL USER3 command will cause the 8033 to set the third calibration point into memory SYNTAX DIAGRAM Parameters None Notes In local ...

Page 62: ...output is ON The DISplay command enables or disables turns off the front panel display and LED indicators Parameters The nrf value of 0 or OFF to disable the display 1 or ON to enable the display Notes When the display is enabled the value displayed will depend upon the present mode of operation When the display is disabled the display contains a blank message and all of the front panel LEDs will ...

Page 63: ...e value on the display is 3 33 DIS response E501 means the interlock broken error is displayed DISPLAY response means the display is blank Action Used to force the 8033 to cease being a listener Example DLF The ENABle command path is used to get to the MPS 8033 s status enable commands The following commands can be reached directly from the ENABle command path ENABle COND ENABle COND ENABle EVEent...

Page 64: ...output on and interlock broken conditions to set bit 1 in the Status Byte The ENABle COND query returns the value of the 8033 status condition enable register Parameters None Response The response data is the binary sum of the following Notes The condition enable register can be set by using the ENABle COND command The condition status can be monitored by the COND command Examples ENAB COND respon...

Page 65: ...nt query returns the value of the 8033 status event enable register Parameters None Response The response data is the binary sum of the following Notes The event enable register can be set using the ENABle EVEnt command The event status can be monitored by the EVEnt command Examples ENAB EVE response 7 means the output on off change interlock enable disable change and new measurements are allowed ...

Page 66: ...OFF response 0 means there are no conditions that will automatically turn off the laser output The ERRors query returns a list of command execution and device errors which have occurred since the last ERRors query These errors are indicated by a number which corresponds to the type of error which occurred The error numbers are decoded in Appendix A Parameters None Response Each response data consi...

Page 67: ...om overlapped commands as previous oper ations complete This may be useful for ensuring that an operation is complete before starting a measurement ESE nrf value Event Status Enable COMMON DEVICE DEPENDENT FRONT PANEL 0 Operation Complete 4 Execution Error 1 N A 5 Command Error 2 Query Error 6 User Request 3 Device Dependent Error 7 Power On 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Logical OR Standard Even...

Page 68: ... if any enabled conditions are true Response is the sum of the enabled bits ESE Event Status Enable COMMON DEVICE DEPENDENT FRONT PANEL 0 Operation Complete 4 Execution Error 1 N A 5 Command Error 2 Query Error 6 User Request 3 Device Dependent Error 7 Power On 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Logical OR Standard Event Status Register Standard Event Status Enable Register Artisan Technology Group Q...

Page 69: ... current state of the IEEE 488 1 ist local message in the 8033 Response 0 IST message is false 1 IST message is true ESR Standard Event Status Register COMMON DEVICE DEPENDENT FRONT PANEL 0 Operation Complete 4 Execution Error 1 N A 5 Command Error 2 Query Error 6 User Request 3 Device Dependent Error 7 Power On IST COMMON DEVICE DEPENDENT FRONT PANEL 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Logical OR Sta...

Page 70: ...OFF The LASer command path is used to get to the MPS 8033 s laser control commands The following commands can be reached directly from the LASer command path EVEnt COMMON DEVICE DEPENDENT FRONT PANEL 1 Output ON OFF change 4096 Calculation Error 2 Interlock enabled disabled 8192 Hardware Error 4 New measurement available 16384 Software Error 32768 Software Checksum Error LASer COMMON DEVICE DEPEND...

Page 71: ...p size may be edited via the LASer STEP command The default step size is 001 mW or 001 dB The step size can be queried via the LASer STEP command The step size for the linear and log scales are kept separately No conversion is done between display scales Examples LAS INC action Increments the output power by the amount of the step size for the present display mode The LASer MODulation command path...

Page 72: ...fix Legal modulation frequencies 160 Hz to 15 KHz GPIB only 270 Hz front panel 1000 Hz front panel 2000 Hz front panel Legal suffixes HZ Hertz KZ KHZ Kilohertz Notes This command has the same effect as pressing the INT MODULATION switch on the 8033 front panel If the suffix is not used the default is HZ If frequencies other than 270 1000 and 2000 Hz are selected the front panel MODE indicators wil...

Page 73: ... operating in the continuous wave mode The LASer OUTput command turns the laser output on or off Parameters The nrf value is 0 OFF and 1 ON Substitute values are shown in Table 3 4 Notes This command has the same effect as pressing the OUTPUT ON switch on the 8033 front panel Following the LAS OUT ON command a two second delay period begins indicated by the OUTPUT ON LED flashing After the delay t...

Page 74: ...elative to 1 mW DB decibels relative to the user defined reference Notes This command has the same effect as using the ADJUST KNOB on the 8033 front panel to adjust the output power If the optional suffix is not used MW is assumed The output power can be set with the output on or off Setting the power does not effect the present display mode The following commands are equivalent and do not change ...

Page 75: ...tts DBM decibels relative to 1 mW Notes This command has the same effect as using the ADJUST KNOB on the 8033 front panel to adjust the output power then pressing the SET REFERENCE switch The display is not forced to the dB scale as it would be from a front panel local execution If the optional suffix is not used MW is assumed The reference power can be set with the output on or off Examples LAS R...

Page 76: ... with the increment and decrement commands Parameters The nrf value represents the step size power Legal step size power ranges Linear Scale 0001 to 1 0000 milliwatts Log Scale 0001 to 1 000 dBm Legal suffixes are UW microwatts MW milliwatts W watts DB decibels Notes The linear mW step and the log dB step are held in separate registers When the increment or decrement command is issued the display ...

Page 77: ...rminator character is received If the message has less than 16 bytes the 8033 will fill the remaining message space with the space character After 16 bytes have been entered the 8033 will null terminate the string Examples MESSAGE Thisisatest action The string Thisisatest will be stored in non volatile memory MES Test3 action The string Test3 will be stored in non volatile memory The MESsage query...

Page 78: ...hen the output is turned on the actual measured power is displayed Examples MODE DB action Sets the display mode to the decibels dB scale The MODE DB query returns the status of the DISPLAY mode switch with regard to the dB scale Parameters None Response The response of 1 means the dB scale is selected and 0 means the dB scale is not selected Notes In local operation the status of the dB display m...

Page 79: ... status of the dBm display mode is determined by visualizing the dBm LED indicator When the output is off the setpoint or desired power is displayed When the output is turned on the actual measured power is displayed Examples MODE DBM response 1 means the dBm display mode is selected MODE DBM response 0 means the dBm display mode is not selected The MODE Watt command activates the linear mW displa...

Page 80: ...meters None Response The response is a string of up to three bytes that represent the display units MW linear mW display is selected DBM log dBm relative to 1 mW is selected DB log dB relative to the user defined reference Notes In local operation the status of the display mode is determined by visualizing the display LED indi cators When the output is off the setpoint or desired power is displaye...

Page 81: ...ll Enable Register is logically ANDed with the Status Byte Register If the result is non zero the ist individual status message is set true Bit Reference OPC Operation Complete Query COMMON DEVICE DEPENDENT FRONT PANEL PRE COMMON DEVICE DEPENDENT FRONT PANEL 0 Event Summary 4 Message Available 8 N A 12 N A 1 Condition Summary 5 Event Status Summary 9 N A 13 N A 2 N A 6 Master Status Summary 10 N A...

Page 82: ...F ON The power on status clear flag see PSC is set false disallowing service request interrupts after power on In the enabled state the enable registers are cleared during power ON The power on status clear flag see PSC is set true allowing service request interrupts after power on Examples PSC 0 Disable automatic power on clearing of the enable registers PSC 1 Enable automatic power on clearing o...

Page 83: ...atus Enable Standard Event Status Enable See Chapter Three for more information on register structure Example PSC Request state of power on status clear flag Action Stores data unique to the 8033 such as calibration date and serial number This data is protected from change by the SECURE nrf command and is usually entered by the factory Notes The arbitrary block program data is exactly 25 bytes lon...

Page 84: ... is the same state as after OPC no further operations to complete These idle states allow the 8033 to complete its reset process no operations pending before con tinuing with other operations Example RST PUD COMMON DEVICE DEPENDENT FRONT PANEL RST Reset COMMON DEVICE DEPENDENT FRONT PANEL 2218210123413YN091201XXX Arbitrary block data string identifier 21 digits in this string Serial number GPIB en...

Page 85: ...5 Example SRE SRE nrf value Service Request Enable COMMON DEVICE DEPENDENT FRONT PANEL 0 Event Summary 4 Message Available 1 Condition Summary 5 Event Status Summary 2 N A 6 Request Service Master Status Summary 3 N A 7 Error Message Available SRE Service Request Enable COMMON DEVICE DEPENDENT FRONT PANEL 7 6 3 2 1 0 7 5 4 3 2 1 0 Logical OR Status Byte Service Request Enable Register 5 4 Service ...

Page 86: ...vent Summary 4 Message Available 1 Condition Summary 5 Event Status Summary 2 N A 6 Request Service Master Status Summary 3 N A 7 Error Message Available 7 6 3 2 1 0 7 5 4 3 2 1 0 Logical OR Status Byte Service Request Enable Register 5 4 Service Request SRQ Event Summary Condition Summary Not Used Not Used MAV Message Available Error Queue Not Empty Standard Event Summary ESB True Artisan Technol...

Page 87: ...mber 3 terminator is used other IEEE 488 2 devices may wait indefinitely for a message termination and hang the bus Examples TERM 5 action the NL new line terminator is selected The 8033 will terminate messages with the NL character The TERM query allows the programmer to determine which program message terminator is currently selected CR carriage return CR NL new line CR END EOI CR NL END NL END ...

Page 88: ...R query is returned The timer counter is initialized at power up The first time the TIMER is issued its response will be the same as the TIME query The clock turns over after about 1193 hours Examples TIME response 6 24 59 06 means that 6 hours 24 minutes 59 06 seconds have passed since the last TIMER query was issued Action Performs internal self test then reports results Response 0 test complete...

Page 89: ...eported by the 8033 on the display or via remote operation Programming Examples This section provides two simple examples of programming the 8033 over the GPIB Both examples are written in QuickBASIC for driving the National Instruments NI 488 2 GPIB card The first is an example of a driver for GPIB communications with the 8033 The second is an example of how to enable the 8033 laser source and wa...

Page 90: ...ND IF 120 130 IF INSTR Command THEN Is the command a query 140 CALL Ibrd Device_id Response Get the response 150 END 160 170 CALL Ibwrt Device_id STB Get the Status Byte 180 CALL Ibrd Device_id Status_byte 190 Err_bit Status_byte AND 128 Is the error queue active bit set 200 IF Err_bit 0 THEN 210 CALL Ibwrt Device_id ERR Get the Error queue 220 CALL Ibrd Device_id Err Report the Errors 230 PRINT E...

Page 91: ... Lightwave MPS 8033 Fiber Optic Source 30 40 CALL Mps8033dvr Device_id LAS OUT ON Response Err Turn on laser 50 On_ok 0 Initialize to laser off 60 70 WHILE On_ok 0 Loop until laser comes on 80 CALL Mps8033dvr Device_id LAS OUT Response Err Is laser on yet 90 On_ok VAL Response Convert string to integer 100 WEND 110 END SUB Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE w...

Page 92: ...HE MPS 8033 TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY OF THE PROCEDURES DESCRIBED IN THIS CHAPTER UNLESS YOU ARE QUALIFIED TO DO SO LASER DIODES ARE EXTREMELY SENSITIVE TO ELECTROSTATIC DISCHARGE QUALIFIED SERVICE PERSONNEL ARE REQUIRED TO WEAR PROTECTIVE EYEGLASSES AND ANTI STATIC WRIST BANDS WHILE WORKING ON THE MPS 8033 CIRCUIT BOARDS CAUTION HIGH VOLTAGES ARE PRESENT ON AND AROUND THE PRINTED...

Page 93: ...ever the MPS 8033 may be calibrated at its intended use temperature if this is within the specified operating temperature range of 0 to 50 C Warm Up The MPS 8033 should be allowed to warm up with the laser output enabled for at least one hour before calibration Calibration Accuracy The unit is calibrated at the factory using a 3 meter FC APC single mode fiber SMF optic patch cord The accuracy of t...

Page 94: ... ADR and MODE CW The display clears for two seconds before the output is turned on and the power is set to the first calibration value 7 Using the ADJUST KNOB change the power until the 8033 display exactly matches the power displayed on the power meter 8 Press SET REFERENCE to store the first calibration point into memory The 8033 then switches to the next calibration value 9 Use the ADJUST KNOB ...

Page 95: ...he Optical Power Meter Make sure the connections are clean and tight 5 Remotely configure the MPS 8033 by using the following GPIB commands CLS LAS STEP 0 0001 MW 6 Remotely configure the power meter for the following This example assumes the ILX Lightwave OMM 6810B is being used CLS POWER AUTO ON RATE SLOW WAVE xxxx Where xxxx wavelength of 8033 source in nanometers 7 Start the calibration by sen...

Page 96: ... When this command is issued the present calibration values are lost and the default calibration is reset ILX Lightwave recommends a user calibration after you execute this command Cleaning the Internal Fiber Optic Connector Occasionally the fiber optic output connector on the 8033 becomes dirty This section describes two procedures for cleaning the end of the output fiber The first method is the ...

Page 97: ... into the bulkhead connector 7 Reattach the connector assembly to the front panel Inspect the routing of the optical cable located at the bottom of the unit The fiber must not be kinked in any way or power stability will suffer Dress the cable as necessary to make sure that all bends are gradual 8 Replace the bottom cover and secure with the two screws Fuse Replacement For continued protection rep...

Page 98: ...er on the 8033 Analog Board E529 through E975 indicates that there is an internal hardware software communication problem which prevents the output from being enabled If GPIB is used it is possible the Outoff register has been intentionally set to disable the output on certain conditions or events Refer to the ENAB OUTOFF command in Chapter 4 It is possible an error condition occurred which turned...

Page 99: ...the bus Slow or unexpected responseto GPIB commands Make sure no two devices have the same GPIB address Check that there are less than 15 devices on the bus and there is less than 20 meters of total cable Make sure the GPIB controller card in the host computer is configured properly Try isolating the 8033 by removing all other instruments from the bus Device does not respond to command remote ligh...

Page 100: ... string will be returned containing all of the error messages which are currently in the error message queue Error Message Reference Table A 2 contains all of the error messages which may be generated by the 8033 Not all of these messages may appear on the front panel display Some refer to GPIB activities only Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg ...

Page 101: ...M DATA digit not expected E 108 DECIMAL PROGRAM DATA more than one decimal point E 109 DECIMAL PROGRAM DATA more than one exponent indicator E E 110 SUFFIX PROGRAM DATA must have digit following sign E 111 SUFFIX PROGRAM DATA must have alpha character following operator E 113 ARBITRARY BLOCK PROGRAM DATA length less than digit count E 114 DEFINITE LENGTH BLOCK PROGRAM DATA premature end of data E ...

Page 102: ...floating point value E 211 PROGRAM DATA will not convert to a character value E 212 PROGRAM DATA will not convert to a byte array pointer E 213 PROGRAM DATA is incorrect block data length E 214 PROGRAM DATA length exceeds maximum E 301 A RESPONSE MESSAGE was ready but controller failed to read it Query error E 501 Interlock disabled output E 511 Control error disabled output E 516 Incorrect Config...

Page 103: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 104: ...f procedures other than those specified herein may result in hazardous radiation exposure Do not enable the laser when there is no fiber attached to the optical output connector The optical output connector is at the bottom right on the MPS 8033 front panel The laser is enabled by pressing the OUTPUT ON switch to the left of the optical output connector The laser is on when the green LED indicator...

Page 105: ...oggle between the three available internal modulation frequencies SET REFERENCE Use the knob to set any desired reference power Then press the SET REFERENCE switch to establish that power as the reference for the dB scale When the SET REFERENCE switch is pressed the display automatically changes to the dB scale OUTPUT Connect a fiber optic patch cord to the FC connector on the front panel of the 8...

Page 106: ...ites Yes Type of Compare on EOS 7 Bit EOS Byte 00h Send EOI at end of Write Yes Enable Repeat Addressing Yes GPIB Termination Characters The default termination characters for the 8033 are CR NL END This does not truly comply with the IEEE 488 2 specification However the CR character is ignored treated as a white space so this terminator may be used with other IEEE 488 2 compliant instruments Sett...

Page 107: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 108: ...ice contact information xiv CW 10 55 CW LED 10 D default calibration 79 parameters 31 settings 8 34 termination charaters 89 device dependent commands 19 21 24 37 device dependent message 18 disassembly 75 80 display 9 12 13 E enable register 26 29 environmental conditions 76 error display 13 error message 33 error messages 72 83 errors 25 32 81 88 event status register 52 F front panel 9 adjust 1...

Page 109: ...on 10 88 LOCAL 11 pulse 15 modulation 10 15 88 N nrf value 22 37 numeric parameters 25 O OCIS 67 operating 7 15 operation complete 30 63 71 OQIS 67 output off 49 enable register 34 forced 33 overlapped sequential commands 33 overview calibration 76 product 1 P parameters commands 22 default 31 multiple 23 substitute 38 Power 4 power AC 8 on switch 15 output 4 88 stability 4 power level 16 Power up...

Page 110: ...5 precision source 4 standard event status register 29 status byte 26 29 30 suffix 37 suffix unit 23 syntax command 21 37 invalid command strings 25 nrf value 22 37 suffix 37 summary 24 white space 21 24 37 T talkers 18 19 terminators 22 24 trigger out TTL OUT 16 trigger output 5 troubleshooting 81 82 W warm up 5 15 76 white space 21 24 37 Artisan Technology Group Quality Instrumentation Guarantee...

Page 111: ...I N D EX iv MPS 8033 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 112: ...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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