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Model 1931/2931 Series Power Meters Manual Rev.B

1. To prevent damage to the equipment read the instructions in the equipment manual for proper input voltage e Adhere to good laser safety practices when using this equipment 1 3 Location of Warnings 1 3 1 Rear Panel Electrical Hazard CAUTION DO NOT REMOVE COVER REFER SERVICING TO QUAUFIED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT R MODEL NO XOX RKO _ S N XXXXX IN iine CA WBA WEEE 13AUG2005 Frame or Chassis Terminal Fuse info MAX Power 1931 C Shown Figure 13 Locations of warnings on the rear panel 2 2 1 General Information Introduction The 1931 2931 Series Optical Meters are designed to provide a powerful combination of features to measure optical power and energy of near monochromatic or monochromatic sources Use of the extensive measurement modes and features have been simplified with an intuitive menu driven structure that provides quick access to all modes features and settings Some of the prominent specifications and features that will simplify your calibrated measurement applications are in the following e Compatibility with low power photodiode detectors Si Ge InGaAs and GaN and photo multiplier tubes PMT e Up to 20 kHz repetition rates for photodiode detectors with signal sampling rates of up to 250 kHz e Multiple measurement modes for power measurements Single Continuous and Peak to Peak e Software suite including LabVIEW drivers N
2. Argument Type Description selection string 1 returns the single value specified 1 10 returns values in the range from 1 10 5 returns the oldest 5 values same as 1 5 5 returns the newest 5 values Note depending on the number of data points requested there may be several read operations required on the USB or RS 232 computer interfaces PM DS INTerval Description Data Store Interval Select Syntax PM DS INTerval lt interval gt Parameters The parameter lt interval gt is of type lt number gt that is an integer The parameter represents the interval in milliseconds for storing one measurement in the data buffer Function This command sets the interval in milliseconds to be used for data storing For example if DSINT 100 and DSSIZE 100 it will take 100 x 100ms to fill the buffer Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS INTerval Description Data Store Interval Query Syntax PM DS INTerval Parameters None Function This query returns the interval in milliseconds currently used for data storing Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS SAVEBUFFER Description Save the current Data Store data to a file Syntax PM DS SAVEBUFFER Remarks The PM DS SAVEBUFFER command saves the current user Data Store for the current channel to a file on the WinCE compatible USB Flash Disk plugged into the USB Host port on the front of the Power M
3. This query returns a value showing whether the external trigger input is enabled or disabled Returns lt state gt lt state gt is of type lt number gt that represents the integer 0 if the external trigger input is disabled If lt state gt is 1 2 or 3 the external trigger is enabled on channel A channel B or both respectively Related Commands PM TRIG EXTernal 98 8 3 3 80 8 3 3 81 8 3 3 82 Communication Command Reference PM TRIG EDGE Description External Trigger Edge Select Syntax PM TRIG EDGE lt edge gt Parameters The parameter lt edge gt is either 0 or 1 If lt edge gt is 0 then the external trigger is defined as a falling edge If lt edge gt is 1 then the external trigger is defined as a rising edge Function This command defines whether the external trigger input on the back panel is falling edge or rising edge active Related Commands PM TRIG EXTernal PM TRIG EXTernal PM TRIG EDGE PM TRIG EDGE Description External Trigger Edge Query Syntax PM TRIG EDGE Parameters None Function This query returns a value showing which external trigger edge 1s the active edge Returns lt edge gt lt edge gt is of type lt number gt and represents 0 if the external trigger is defined as a falling edge or 1 1f the external trigger is defined as a rising edge Related Commands EXT PM TRIG EXTernal PM TRIG EXTernal PM TRIG EDGE PM TRIG HOLDoff Description External Trigger Holdoff
4. 68 Computer Interfacing This page is intentionally left blank 8 1 8 2 Communication Command Reference Model 1931 2931 Series Remote Interface Commands A complete listing of the commands supported by 1931 2931 C series power meters is provided below Command Overview There are two types of commands commands that cause the power meter to take a desired action and queries that return a stored value or state of the power meter Queries must end with a question mark while commands may require parameter s to follow PM Lambda 810 For example the value 810 in the command PM Lambda 810 sets the wavelength for the currently selected channel to 810 The table below summarizes all the commands and queries supported by the 1931 2931 C series power meters The command query MUST contain all of the letters which are shown in upper case in this table The lower case letters shown with the commands are optional and may be used for clarity If any of the optional letters are used then all of the optional letters are now required for the current command The commands may be sent to the instrument in either upper or lower case or in any combination For example the following commands are equal PM Lambda 810 PM L 810 pm L 810 Pm L 810 COMMAND EXECUTION The controller interprets the commands in the order they are received and execute them sequentially Ifa set of commands have to be executed closer to each other
5. TELT R5232 Parameters Color Selection Brightness Measure Figure 44 System Settings screen 48 4 6 4 7 System Operation Pressing the About soft key will About bring a another screen with Firmware Version 1 0 6 Jul 9 2006 information about the unit Firmware Instrument S N P1001 Instrument Cal Date May 19 2008 version serial number calibration ooo d hadda h head Detector Model 918D SL ODS3 ate In addition the attache Detector S N 10095 detectors data is diplayed Figure Detector Cal Date Jan 23 2007 45 From here one can navigate Detector Model 918D IR OD2 Detector S N 10002 back to the Measurement Settings or Oct 17 2008 back to the System Settings Figure 45 About screen USB Address and RS232 Parameters The USB Address can be changed in the System Settings screen Figure 44 Navigate to the USB Address and hit Enter In the drop down menu select the desired USB address The RS232 Parameters are fixed at Baud Rate 38400 Data Bits 8 Stop Bits 7 Parity None Xon Xoff Xoff Statistics The 1931 2931 Series can display ll Statistics statistics for the measurement in Mode Fixed Meas 39 75 yw progress From the main screen tato i Max 39 977 uw press the Soft key labeled m ees N F gi ples Range 0 1042 yw Statistics The Statistics screen 1S ii Mean 39 928 uw displayed as in Figure 46 S
6. 58 5 3 Performing Basic Measurements Detector Family Mode CW Continuous CW Singe CW Single x Low Power Pk Pk single Single Table I Available Measurement Modes and Valid Units The following instructions assume familiarity with the meter s functions They also include steps to incorporate background correction and assume that the experimental setup under fills and does not saturate or damage the detector CW Measurements This section describes the procedure for making basic optical power measurements while properly removing the influence of ambient light and other drift effects e With a 918D Series Detector also 818 XX lower power detectors with proper adapters connected to the meter turn the meter on Press the Mode key and then select CW Continuous with the Navigation keys Use the ESC key to return to the Main screen Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Cover or otherwise block the light source being measured and then press the Zero key to turn the Offset on This effectively removes any background signal from subsequent measurements Uncover the source so that it illuminates the detector and note the displayed value This reading is the optical power observed by the detector due to the source This process assumes that the ambient signal is not changing between the time when the Zero key is pressed and when the measurement
7. Description Display brightness query Syntax DISP BRIGHT Remarks The BRIGHT query returns the display brightness setting Response Type Description Brightness int Display brightness in levels from 0 to 7 Related Commands DISP BRIGHT Power Meter Commands IDN Description Identification Query Syntax IDN Parameters None Function Remarks This query will cause the power meter to return an identification string Controller Serial Model Firmware Firmware name version date re a S o a sae NEWPORT XXXX vYYY mm dd yy SNZZZZ Examples NEWPORT 1931 C v1 0 0 12 12 05 SNOOO1 NEWPORT 2931 C v1 0 0 12 12 05 SNOOO1 RCL Description Recall Configuration Settings Syntax RCL bin Remarks The RCL command restores the power meter to the setup state saved in its non volatile flash memory Argument Value Description bin 0 Reserved I to 5 Valid configuration settings Related Commands SAV 74 8 3 3 3 8 3 3 4 8 3 3 5 Communication Command Reference SAV Description Syntax Remarks Argument bin Save Configuration Settings SAV bin The SAV command saves the present state of the power meter in its non volatile flash memory A particular state is then recalled using the RCL command If the display precision or any one of the custom wavelengths are changed the present state of the power meter will automatically be saved in configuration setting 1 When the power meter is reset the state of the me
8. and minimum readings in the statistics buffer lt mxmn gt lt mxmn gt is of type lt number gt in exponent notation PM STAT SDEViation Description Syntax Parameters Function Returns PM Temp Description Syntax Statistics Standard Deviation Query PM STAT SDEViation None This query returns the standard deviation of the readings in the statistics buffer lt stddev gt lt stddev gt is of type lt number gt in exponent notation 918 detector temperature query PM Temp Communication Command Reference 97 Remarks The PM Temp query returns the 918 detector s temperature as a float in degrees Celsius Response Type Description temp float Detector temperature in degrees Celsius C Related Commands PM ATT 8 3 3 78 PM TRIG EXTernal Description External Trigger Enable Syntax PM TRIG EXTernal lt enable gt Parameters The parameter lt state gt 1s either 0 1 2 or 3 If lt state gt is 0 then the external trigger is disabled If lt state gt is 1 then the external trigger is enabled on channel A If lt state gt 1s 2 then the external trigger is enabled on channel B If lt state gt is 3 then the external trigger 1s enabled on both channels Function This command enables or disables the external trigger input on the back panel Related Commands PM TRIG EXTernal 8 3 3 79 PM TRIG EXTernal Description External Trigger Enable Query Syntax PM TRIG EXTernal Parameters None Function
9. float Spot size cm Related Commands PM SPOTSIZE PM DETSIZE 8 3 3 71 PM SPOTSIZE Description Syntax Remarks Response Spot size Detector spot size query PM SPOTSIZE The PM SPOTSIZE query returns the detector spot size 2 in cm Type Description float detector spot size in cm Related Commands PM SPOTSIZE PM DETSIZE 8 3 3 2 PM STAT MAX Description Syntax Parameters Function Returns Statistics Maximum Value Query PM STAT MAX None This query returns the maximum value in the statistics buffer lt max gt lt max gt is of type lt number gt in exponent notation 8 3 3 73 PM STAT MEAN Description Syntax Parameters Statistics Mean Value Query PM STAT MEAN None 96 8 3 3 74 8 3 3 75 8 3 3 76 8 3 3 77 Communication Command Reference Function Returns PM STAT MIN Description Syntax Parameters Function Returns This query returns the mean or average of all the values in the statistics buffer lt mean gt lt mean gt is of type lt number gt in exponent notation Statistics Minimum Value Query PM STAT MIN None This query returns the minimum value in the statistics buffer lt min gt lt min gt is of type lt number gt in exponent notation PM STAT MAXMIN Description Syntax Parameters Function Returns Statistics Max Min Query PM STAT MAXMIN None This query returns the difference between the maximum
10. ge range The PM RANge command selects the gain stage when making readings from the detector head The range of this value depends on the detector being used 8 3 3 63 8 3 3 64 8 3 3 65 Communication Command Reference 93 Response Type Description range int Values range from 0 to 7 Related Commands PM RANge PM AUTO PM RANge Description Range query Syntax PM RANge Remarks The PM RANge query returns an integer that indicates the present range The range of this value depends on the detector being used Response Value Description range 0 Values range from 0 to 7 Related Commands PM RANge PM AUTO PM REF VALue Description Reference Value Define Syntax PM REF VALue lt val gt Parameters The parameter lt val gt is of type lt number gt Function This command provides a means of directly storing a reference value to be used in linear and logarithmic dB relative measurements The units of this value are the current units being used by the instrument Related Commands PM REF STOre PM REF VALue PM REF VALue Description Reference Value Query Syntax PM REF VALue Parameters None Function This query returns the user defined reference value The units of this value are the current units being used by the instrument Returns lt refval gt lt refval gt is of type lt number gt Related Commands PM REF STOre PM REF VALue 94 8 3 3 66 8 3 3 67 8 3 3 68 8 3 3 69 Communication
11. the instrument back to the main screen If the Enter key is pressed a selection is made and the instrument goes back to the main screen The digital filter values can be edited When one of the digital filter values is ae S selected the right most soft key 1 kHz becomes Edit Value Pressing this Soft key displays a cursor on top of the first digit of the edited filter value The Navigation Up Down keys modify the digit while the Left Right keys move the cursor to the next digit When finished press the Enter key to store the new digital filter value and press Enter again to select the new value and exit the Filter configuration screen Figure 36 Digital Filter editing Lambda A Key The Lambda A key brings the Default and Custom Wavelengths screen This screen allows the user to choose a default wavelength for the measurement in progress or to choose a custom wavelength See Section 4 4 for more details Present Wavelength 780 nm Hint Use arrow key s to select w avelength Figure 37 Wavelengths screen 42 4 2 4 2 1 System Operation Set Zero Offset Zero Key The Zero Offset key or short Zero key 1s used to temporarily zero the instrument for the measurement in Range 110 0 pW progress When the user presses this ae key the instrument takes the displayed 0 kiada May Can WIO de _yv Lor it numeric value as offset and subtracts it from all the subsequent measurements When the
12. 1931 2931 C Series Optical Meters optimized for your applications Newport will on occasion update existing and add new features to this instrument To utilize this new functionality will require an update to the instrument s firmware which can be easily accomplished by the user as described in the User s Manual As required Newport will also generate a new version of this User s Manual reflecting updates to the instrument Please check the product page on the Newport web site www Newport com for newer versions of the firmware and the User s Manual Call your local Newport application specialist if you need support with locating or downloading these files Enjoy your new instrument Preface Warranty Newport Corporation warrants that this product will be free from defects in material and workmanship and will comply with Newport s published specifications at the time of sale for a period of one year from date of shipment If found to be defective during the warranty period the product will either be repaired or replaced at Newport s option To exercise this warranty write or call your local Newport office or representative or contact Newport headquarters in Irvine California You will be given prompt assistance and return instructions Send the product freight prepaid to the indicated service facility Repairs will be made and the instrument returned freight prepaid Repaired products are warranted for the remai
13. A E T E E S ET 67 Model 1931 2931 Series Analog Signal Flow Diagram 105 Fuse Replacement actiscioistiacanneenatncaedatic a astasaehees 113 XIV Preface List of Tables Table 1 Available Measurement Modes and Valid Units 0 0 0 eeeeeee 58 Table 2 Root level Commands Queries Summary ccssesseeeeseseeeeeees 70 Table 3 Tree Level Commands Queries Summary cccsseeseeseeseeeeeeees I2 Table 4 Analog Signal Flow Paths cccccceececccceceeesssaeeeeessssseeeees 106 Table 5 Time Varying Signal Measurementts cccceceececeeeeeeeeeeeees 108 Table 6 Analog Output Range Table eenas EE E 108 Table 7 Common Measurement Errors cccccccsssessssseeeeeeeeeeeeeeeeeeaeaaaans 112 Table 8 Using a number as a command MNEMONIC ccceeeeeeeeeeeeeeeeeees 121 Table 9 Using the wrong parameter type ccccccccccceeceeeeeeeeeeeeeeeeeeees 121 Table 10 Using ASCII characters outside of a string constant that are not defined by the command language syntax ccccccccceeeeeeeeeees 121 Table 11 Missing or too many parameters cccccccccccceeeeeeeeeeeaeeseeeeeees 122 Table 12 Legacy Commands Reference oiccnenuii i E 126 Table 13 Disassembled 1931 2931 model ccc ceeeessssssssesessseseseeeseseees 130 1 1 1 Safety Precautions Definitions and Symbols The following terms and symbols are used in this documentation and also appear
14. Command Reference PM REF STOre Description Reference Value Store Syntax PM REF STOre Parameters None Function This command takes the latest reading and stores it as a reference reading to be used when making relative linear and dB measurements The units of this value are the current units being used by the instrument Related Commands PM REF VALue PM REF VALue PM RESPonsivity Description Responsivity query Syntax PM RESP Remarks The PM RESP query returns the responsivity currently used in making power calculations Response Type Description Responsivity float Power meter responsivity Related Commands PM RESP PM UNITS PM PWS PM RUN Description Run command Syntax PM RUN mode Remarks The PM RUN command disables or enables the acquisition of data Argument Value Description Mode 0 Stop l Run Related Commands PM RUN PM MODE PM RUN Description Run query Syntax PM RUN Remarks The PM RUN query returns an integer indicating the present run mode Response Value Description Mode 0 Stopped l Running Communication Command Reference 95 Related Commands PM RUN PM MODE 8 3 3 70 PM SPOTSIZE Description Syntax Remarks Argument Value Set detector spot size PM SPOTSIZE value This command sets the detector spot size By default the spot size is same as a detector s surface area This value is used to when measurement units are set to W cm J cm or Sun Type Description
15. Description none Communication Command Reference 85 8 3 3 38 PM DS Count Description Syntax Remarks Argument count 8 3 3 39 PM DS ENable Description Syntax Remarks Argument enable Data Store data item count query PM DS Count The PM DS Count query returns the number of measurements that have been collected in the Data Store Type Description int The number of measurements that have been collected Enable Data Store Collection PM DS ENable enable The PM DS ENable enables or disables the collection of measurements in the Data Store Value Description 0 Disabled i Enabled Data will be collected after the PM DS ENable command has been called with a parameter of 1 Data collection will stop when the PM DS ENable command has been called with a parameter of 0 or when a fixed size data buffer is full Related Commands PM DS ENable 8 3 3 40 PM DS ENable Description Syntax Remarks Argument enable 8 3 3 41 PM DS GET Description Syntax Remarks Enable Data Store Collection query PM DS ENable The PM DS ENable query returns the enabled status of the Data Store Type Description int See PM DS Enable for a description of the enable argument Retrieve Data Store data query PM DS GET num The PM DS GET command returns a number of measurements that have been collected in the Data Store 86 8 3 3 42 8 3 3 43 8 3 3 44 Communication Command Reference
16. OFF option Select the setting and hit Enter Analog and Digital Filter Selection With the Navigation Selection keys bring the cursor on top of the Analog or Digital field Hit the Enter key A drop down menu appears with the available filter settings Select the desired filter and hit Enter The Analog and Digital filter configuration can be accessed any time with the Filter dedicated key Refer to Section 4 1 6 for details Units Selection With the Navigation Selection keys bring the cursor on top of the Units field Hit the Enter key A drop down menu appears with the available units Select the desired units and hit Enter Mode Selection This setting allows the user to change the measurement mode The available modes are as follows Continuous Wave Continuous Run CW Cont e Continuous Wave Single Shot CW Single Peak to Peak Continuous Run Pk Pk Cont Peak to Peak Single Shot Pk Pk Single 44 4 2 2 4 3 System Operation RMS Measurements RMS Refer to Section 5 Performing Basic Measurements for detailed information regarding these modes Spot Size This setting allows users to change the spot size The default spot size 1s set to be same as the detector size The spot size can be modified by navigating the cursor to this setting and pressing the Setup Enter key The value then becomes editable each digit in the value can be changed by pressing Up Down arrow keys and different digits can be s
17. ON or OFF the echoing of commands sent to the power meter over RS 232 communication interface By default the echo is turned ON Response Value Description echo set 0 Echo OFF l Echo ON Related Commands ECHO 76 8 3 3 9 8 3 3 10 8 3 3 11 Communication Command Reference ECHO Description Echo query Syntax ECHO Remarks The ECHO query returns the echo status of the power meter Response Value Description status 0 Echo OFF i Echo ON Related Commands ECHO ERRors Description Error query Syntax ERRors Remarks The ERRors query returns a single error number that has occurred since the last query This error is indicated by a number that corresponds to the type of error that occurred This command also clears the read error from the Error buffer Response Type Description Error code int Error code number per Appendix B 0 1f no errors Related Commands ERRSTR ERRSTR Description Error string query Syntax ERRSTR Remarks The ERRSTR query returns a single error number along with the corresponding error text string that have occurred since the last error query Response Type Description Error code string Error code number and text for error code as text per Appendix B 0 if no errors Related Commands ERRors 8 3 3 12 8 3 3 13 8 3 3 14 Communication Command Reference TT PM ANALOGFILTER Description Analog filter select command Syntax PM ANALOGFILTER setting Remarks The PM ANALO
18. PM MAX Lambda The PM MAX Lambda query returns the longest calibrated wavelength in nanometers If no detector is preset the max lambda for the last read detector is returned Type Description int Wavelength in nanometers nm Related Commands PM MIN Lambda 8 3 3 53 PM MAX Power Description Syntax Remarks Response Power Maximum power query PM MAX Power The PM MAX Power returns current range s maximum readable power Type Description float Power in Watts 8 3 3 54 PM MIN Lambda Description Syntax Remarks Minimum wavelength query PM MIN Lambda The PM MIN Lambda query returns the shortest calibrated wavelength in nanometers If no detector is preset min lambda for the last read detector is returned 90 8 3 3 55 8 3 3 56 Communication Command Reference Response Type Description Wavelength int Wavelength in nanometers nm Related Commands PM MAX Lambda PM MIN Power Description Minimum power query Syntax PM MIN Power Remarks The PM MIN Power returns current range s minimum readable power Response Type Description Power float Power in Watts Related Commands PM MAX Power PM MEAS TIMEOUT Description Measurement timeout set command Syntax PM MEAS TIMEOUT value Remarks This command sets the measurement timeout period This value is used for making the following measurements 1 Peak to peak measurements These measurements are updated once every tim
19. Set data store behavior select Returns data store behavior select Clear data store Returns data store count of items stored Set data store enable Returns data store enable Returns data store data 1 1 10 5 5 value range oldest 5 newest 5 Set data store interval Returns data store interval Saves the data store buffer to a WinCE compatible USB flash disk Sets the size of the Data Store buffer Returns the sizes of the Data Store buffer Returns data store units Selects the filtering operation no filtering analog filter digital filter or analog and digital Returns the filtering operation no filtering analog filter digital filter or analog and digital Sets the wavelength for use when calculating power Gets the selected wavelength in nanometers Returns the longest calibrated wavelength in nanometers Returns current range s maximum readable power Returns the shortest calibrated wavelength in nanometers Returns the minimum readable power in present range Sets the measurement timeout period Returns the measurement timeout period Acquisition mode select 71 Page No 2 73 77 11 77 78 77 78 79 79 79 80 80 80 80 81 81 81 82 81 82 82 83 83 83 83 84 84 85 85 85 85 86 86 86 87 87 87 88 88 88 89 89 89 89 90 90 91 91 Communication Command Reference Name Numper of Function Page Parameters No PM MODE NONE Returns the currently selected
20. a standard three prong socket and voltage setting switch The unit can also be grounded with a circular metal shell connector Markings on the rear panel identify electrical requirements for the Optical Power Meter and potential hazards associated with using it NOTE For the listed optional connectors some units may have a cover in place of the non functional connector CAUTION Change the voltage settings switch to the proper AC voltage supply Do not operate with a line voltage that is not within 10 of the line setting Too low of an input voltage may cause excessive ripple on the DC supplies Too high of an input voltage will cause excessive heating 3 3 3 System Overview 31 CAUTION There are no user serviceable parts inside the power meter Work performed inside the power meter by persons not authorized by Newport may void the warranty WARNING To avoid electrical shock hazard connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury Changing Voltage Settings The 1931 2931 C Series can operate on several different supply voltages Before powering up the unit check the facility AC voltage supply and select the appropriate setting according to the procedure below Use the following procedure to change the 1931 2931 Series voltage setting l Ensure that the 1931 2931 Series is turned OFF and disconnected from the AC
21. are assigned a default value of 1 when the system 1s first turned on The reference values are stored and displayed in the selected units The user can change the reference values with a remote command PM REF VAL value as described in Section 8 3 If the displayed units change then the user needs to update the stored reference value so that the system will store the new units in the reference The Math field can be turned off from the math configurations screen The second Soft key 1s labeled Display OFF If this key is pressed the system return to the default screen and the Math field disappears System Operation 51 4 9 Measurement Correction Settings The 1936 2936 Series power meters provide users the capability to correct actual measurements taken by it through a Correction Settings screen This screen can be accessed by pressing the Correction soft key in Measurement Settings screen Figure 50 The Measurement Settings screen as described earlier can be accessed by pressing the Setup key from main measurement screen The Correction Settings screen Measurement Settings Figure 51 allows users to enter Wavelength 57 two 2 multiplier values labeled Range 172 oF e 4 55 Range type oy Let amp Mo Therm Multiplier l M1 and E ii W i Responerty 1 555E 1 Multiplier 2 M2 besides an S Hel Ret vel O 0010 Sun Offset value The corrected ne ae Cty R measurement is arrived at usin
22. are recalculated for the new list and the process repeats with the new measurement The Clear Stats soft key can be used to clear statistics and the samples collected at any time The Display OFF soft key can be used to turn OFF the math display on the main measurement view The Graph soft key Section 4 7 1 can be used for the visualization of the measured values on a time graph The Statistics screen displays also the current measured value at the top of the right column Graph The Graph soft key displays the last V l 3 5216 mw a 10000 measurements on a time graph Figure 47 Due to the sample time interval of 100us the graph duration is second The graph width is 270 pixels and because of that the system has to decimate the 10000 samples to fit them in this fixed number of pixels Therefore the Gan T se fae graph might look choppy if the graph zoom is set on 1 Figure 47 Graph screen The user can zoom into the graph with the Soft keys Zoom and Zoom As the zoom changes the graph displays a finer picture of the measurements The zoom value is retained at the top of the screen Pressing the Zoom soft key will zoom in the graph 2 times the previous zoom value Pressing the Zoom soft key will zoom out 2 times the previous zoom value The maximum graph value is displayed in the upper left corner of the display If the Cursor soft key is pressed a vertical line cursor is displayed The user can d
23. eaoin a e e ee VD As Device ENO ninen a a 13 Appendix C Legacy Commands Reference 14 Appendix D Sample Programs 14 1 Progrimmine Sample Sere E WAZ LabVIEW merriami E EO 14 3 Microsoft Visual Basic cece ceeeeecseccessccssceesccessceeeces 14 4 Microsoft Visual Caches 2 e A A TAS Microsolt NE Treenari ea naa O cuchatebcnedaecgskamateSoned 15 Appendix E Disassembly Instructions 15 1 Disassembly InstrUCHONS iiaia E A EAEE List of Figures Figure 1 General Warning or Caution Symbol sssssseessesssssssrrrrreen Figure 2 Electrical Shock Symbol ssc sadsites an otniteheuteh ivontnnteatanes Figure 3 Protective Conductor Terminal Symbol cccceeeeeeeeeeeeee Figure 4 CEMI Kesra ae den een Geman tcl Ga Figure 5 Alternating Voltage Symbol cceccccccccceeeseeeeeeeeseeeseeeees Figure 6 Oi Sy DO lge O Figure 7 OEE Sy ta DO kenurna techeneasnceds aren ieoannned te tucbercaanced aren neee Figure 8 BUS C S VO haat oats hassles Gens asia ots vhs ested Figure 9 Frame or Chassis Terminal Symbol cccceeeeeeeeeeeees Figure 10 USB connector Symbol ccececccccccceceeceeeeeeeeeeeeeeeeeeeeeeeeees Figure 11 WEEE Directive SynDo lecim Figure 12 AC Receptacle Warning Label cccccccseeeeseseeeeeeees Figure 13 Locations of warnings on the rear panel cccceeeeeeeeeeees Figure 14 Promt P ane Layon inesi tial tieaen eesidduceeaeels Figure 15 1931C Rear Panel ay Out eicere
24. for each channel Analog output enables direct monitoring of a detector through an oscilloscope or voltmeter On the rear panel there are also trigger outputs one for each channel The user can use these outputs to synchronize external equipment with events related to the power meter measurements Panel Layout The rear panel is a brushed aluminum plate with input and output connectors for the following cable types 15 Pin D Sub Optical Detector Input Channel A 1931 C 2931 C BNC Analog Output Channel A 1931 C 2931 C BNC Trigger Output Channel A 1931 C 2931 C 15 Pin D Sub Optical Detector Input Channel B 2931 C BNC Analog Output Channel B 2931 C BNC Trigger Output Channel B 2931 C BNC Trigger Input USB Universal Serial Bus Device 9 Pin D Sub RS 232 CAUTION DO MOT REMOVE COVER REFER SERVICING TO QUAUAED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT amp MODEL NO XX0O0KX z XXXXX iine CA USA WEEE 13AUG2005 gt 100 120 0 8A T 250 220 240 0 44 T 290 Figure 15 1931 C Rear Panel Layout System Overview CAUTION DO MOT REMOVE COVER REFER SERVICING TO QUAUAED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT amp MODEL NO XXX REKO S N XXXXX IN kine CA USA WEEE 13AUG2005 100 120 0 8A T 2504 h 220 240 0 44 T 250 _ Figure 16 2931 C Rear Panel Layout The rear panel also has an AC input power connector IPC with
25. installs the USB drivers that are required to use USB communication The design of the software is to allow the user to remotely control basic functions of the instrument 6 2 Connection Start the application which will detect and connect the attached power meter File View Tools Help Newport Optical Power Meter Application O EJ CONE Channel A l Channel B Connect Button Mode DC CONT Mode DC CONT _Stop 47 758 nw Indicator 45 032 nw Range _0 1 2f3 4 5 6 7 3 Wavelength a00 nm Power Range o i 2 3 4 s5lel 7 A Wavelength FOO nm Power 0 o Connected ADDR 4 Err none 12 6 2005 9 38 AM Figure 59 Application front panel 64 Software Application 6 3 General Usage This software application allows the user to setup and monitor the instrument remotely The controls on the instrument are available in the software in a very easy to read and change format Application Options Connection Configuration Data Display Brightness 100 Channel A Channel B Attenuator iw Attenuator iw Wavelength eno Wavelength i700 Units w Units E Mode DC CONT Mode DC CONT Figure 60 Application Advanced Options Configuration Tab The application is designed to have menus similar to standard Windows applications like MS Word to ease usability 6 4 Menu Structure To Exit the application go to the File menu and select Exit The Edit Advanced Options menu has additional p
26. on the Models 1931 2931 Series Optical Power Meters where safety related issues occur General Warning or Caution A Figure 1 General Warning or Caution Symbol The Exclamation Symbol in the figure above appears in Warning and Caution tables throughout this document This symbol designates an area where personal injury or damage to the equipment is possible IN Figure 2 Electrical Shock Symbol Electric Shock The Electrical Shock Symbol in the figure above appears throughout this manual This symbol indicates a hazard arising from dangerous voltage Any mishandling could result in irreparable damage to the equipment and personal injury or death Protective Conductor Terminal Figure 3 Protective Conductor Terminal Symbol The protective conductor terminal symbol in the above figure identifies the location of the bonding terminal which is bonded to conductive accessible parts of the enclosure for safety purposes 16 Safety Precautions European Union CE Mark Ce Figure 4 CE Mark The presence of the CE Mark on Newport Corporation equipment means that it has been designed tested and certified as complying with all applicable European Union CE regulations and recommendations Alternating voltage symbol rw Figure 5 Alternating Voltage Symbol This international symbol implies an alternating voltage or current On Figure 6 On Symbol The On Symbol in the figure above represents a power switch posit
27. these commands can be sent to the controller simultaneously by creating a command string with semicolon used as a command separator The command string length should not exceed 50 characters In the example shown below a command string was created with semicolon 70 8 2 1 8 3 8 3 1 Name IDN RCL SAV ADDRess ADDRess BEEP BEEP ECHO ECHO ERRors ERRSTR Communication Command Reference separating 5 queries The controller responds to this command string with a response that has 5 values using a comma as a separator COMMAND STRING PM P PM ATT PM L ERR INSTRUMENT RESPONSE 1 2450 1 810 0 Activate a Specific Channel The command set of the power meter by default operates on channel A In case of 2931 C power meter where there are 2 channels the users can send commands for channel B after selecting this channel through PM CHANnel command Once a desired channel is selected using this command all subsequent commands sent to the power meter will be addressed to that channel until it is changed again The power meter defaults to channel A following a reset Note that the channel selected 1s specific to the communication interface over which the PM CHANnel command was issued For instance if PM CHANnel 1 command was issued over RS 232 interface and PM CHANnhel 2 command was issued over USB interface all subsequent commands issued through RS 232 and USB interfaces will be addre
28. to the user to improve the measurement precision for different detectors It is well known that white noise has large spectrum The noise level increases with bandwidth The higher the noise the higher the minimum signal that can be measured The quality of the measurement can be linked to the signal to noise ratio SNR the higher the SNR the better the measurement precision of very small signals In order to increase the SNR the user may choose to cut the bandwidth of the meter depending on the detector signal For example if the detector 1s modulated with a sine wave of 800Hz the user may choose to set the Analog filter to 1kHz to increase the SNR and be able to measure very small signals Also cutting the bandwidth at 1kHz does not affect the measurement However 1f the modulation frequency is 800Hz but the signal is a square the user may opt to cut the bandwidth higher at 12 5kHz to let the signal harmonics be unfiltered and minimize the distortion Of course in this case the noise in the system will increase with the square root of the bandwidth The user needs to asses the tradeoffs in his measurement taking advantage of the 1931 2931 Series high flexibility in setting the proper filters for the measurement Generally the 5Hz filter is used for CW Cont measurements However the 1931 2931 Series can measure the amplitude of AC signals down to 0 01Hz so the 5Hz filter can be used for any modulating signal below 5Hz The D
29. using two single quotes together Example this string contains a single quote All characters within the two outer single quotes are considered part of the string It 1s an error if the string does not terminate with a single quote The string cannot contain the lt CR gt ASCI decimal 13 lt LF gt ASCI decimal 10 or End or Identify characters 3 lt string gt defined using no quotes 118 Appendix A All strings using this format must start with an alphabetic character A through Z a through z All other characters must be either alphabetic digit 0 through 9 or the character Any other character will delimit the string Some examples are shown below Sent this is a string Interpreted this Ist string 1S 2nd string a 3rd string string 4th string Sent this isastring Interpreted this Ist string separator character isastring 2nd string Sent w cm Interpreted w Ist string ERROR unrecognized character cm 2nd string Definition of lt number gt 1931 2931 Series recognizes four types as lt number gt thus any format may be used 4 l lt number gt defined as floating point Js 2 lt number gt defined as binary 6 3 lt number gt defined as octal 7 4 lt number gt defined as hexadecimal Where necessary integers are converted to floating point numbers In all cases a number is terminated by any of the below characters lt NL gt lt EOI gt lt SPA
30. will only fit into 19 EIA style racks 19 00 2A 18 31 4 258 HOLES al 6 39 02 17 20 Figure 17 PMI RACK mounting kit System Overview 33 13 80 2X 35 28 18 5 48 a266 HOLES 5 94 02 AG 1750 Figure 18 PM2 RACK mounting kit To mount the units in these racks the user needs to remove the four feet at the bottom of the instrument With the hardware supplied with the rack mount kits the bottom of the unit s is secured to the bracket using all four original feet mounting positions Figure 19 After tightening the screws the unit s may be slid into a 19 rack and secured to the side rails 34 System Overview 4x M6 RACK DRESS NUT i 44 8 32 x 1 2 M F STANDOFF 4X MG PLASTIC SHOULDER RACK DRESS WASHER RACK MOUNT PANEL SINGLE CHANNEL SHOWN 2X SIDE RAIL 446 42 x 6 147 UC PAN HO SCREW 4x MG X 12MM PAN HO PH SCREW 46 Me s 16mm PAN HO FH RACK DRESS SCREW 44 M6 BELLEVILLE WASHER 4x ME T NUT Figure 19 Mounting details for the PMI RACK mounting kit 4 System Operation 4 1 Front Panel Keys The front panel keys are organized in three groups see Figure 20 e Navigation Keys Reconfigurable also called Soft Keys e Escape ESC Key Besides these keys the front panel has a Power switch and a USB connector on the left side of the instrument a gt Rimaport Power Meter Model 2931 0 Navigation Keys es Escape Key USB Connector Power S
31. 15 1 Appendix E Disassembly Instructions NOTE These disassembly instructions are intended only for recycling at the end of the product lifetime For troubleshooting or servicing users should contact the local Newport Corporation representative There are no user serviceable parts inside the equipment Attempting to self service the unit will void the warranty Disassembly instructions Table 13 shows an exploded version of the 1931 2931 Series For recycling purposes only the disassembly steps are as follows 1 Make sure the unit power cord is removed 2 Remove any other cables detectors trigger cables Analog Output monitor cables USB RS232 TEC cables ground cable Remove the bottom screws of the cover Remove the cover Remove all the screws on the rear panel except the fan screws 3 4 5 6 Remove the rear panel 7 Unplug PCBA 1 and 2 from the front panel 8 Remove the screws that secure the front panel on enclosure 9 Remove the front panel 10 Remove the screws that secure PCBA 3 to the front panel 11 Remove PCBA 3 12 Remove the screws that secure PCBA 4 to the bottom of the enclosure 13 Remove PCBA 4 Appendix E 130 Rear Panel wv M O oO PCB 3 Front Panel Enclosure Table 13 Disassembled 1931 2931 model End User License Agreement for Embedded Software Components You have acquired a device DEVICE that includes software licensed by Newport Corpo
32. 2 Pry out the fuse cover and remove the fuse holders 3 Replace the fuse s Use only Slo Blo fuses as indicated below Fuse Replacement Line Voltage 0 80Amp T 250V 100 120VAC 0 40Amp T 250V 220 240VAC 4 Reconnect the power cord and turn on the instrument If the problem persists contact Newport Corporation for service Obtaining Service Models 1931 2931 Series Optical Power Meters contain no user serviceable parts To obtain information regarding factory service contact Newport Corporation or your Newport representative Please have the following information available 1 Instrument model number on the rear panel 2 Instrument serial number on rear panel 3 Description of the problem If the instrument is to be returned to Newport Corporation you will be given a Return Number which you should reference in your shipping documents Please fill out a copy of the service form located on the following page and have the information ready when contacting Newport Corporation Return the completed service form with the instrument Maintenance and Service 115 10 4 Service Form QAS Newport Corporation U S A Office 800 222 6440 FAX 949 253 1479 Newport Name Return Authorization Please obtain RA prior to return of item Company Please obtain RA prior to return of item Address Date Country Phone Number P O Number FAX Number Item s Being Returned Model Serial Description Reason for
33. CE gt Any non valid characters detected in any number received are considered an error in format and an error condition will be generated in the system A description of each type of lt number gt follows I lt number gt defined as floating point Appendix A Any of the following characters as the first character of an ASCII sequence indicates that a number 1s being defined 0123456789 A floating point number is defined as follows 1 Optional sign This defines the sign of the number If missing positive is assumed 2 Optional 0 9 digits These digits define the integer portion of the mantissa 3 Optional decimal point This defines the end of the integer portion of the mantissa and indicates that the fractional portion of the mantissa follows 4 Optional 0 9 digits These digits define the fractional portion of the mantissa 5 Optional exponent indicator an ASCII E or e followed by a or optional followed by decimal digits Examples The numbers below all represent the value 1 2 1 2 1 2e0 01 2E 00000 120E 2 12e1 The numbers below all represent the value 1 2 1 2 1 2e 00 0001 2e 0 120e 2 12E1 2 lt number gt defined as binary The 1931 2931 Series recognizes unsigned binary numbers in the range of 0 to 65535 decimal or O to 1111111111111111 binary Binary numbers are represented using only the digits 0 and 1 A binary number has the followi
34. ET programming capability and high speed data transfer utility e 250 000 of internal data point storage and external USB flash memory compatibility e Triggering features to synchronize measurements with external events USB and RS 232 Interfaces Rack Mountable in Single or Dual Set Configurations The full color TFT 5 6 LCD renders excellent visibility both with the naked eye and laser goggles for single screen rendering of plotted and enumerate results Measurements can be displayed in W Amps dBm dB or relative units either directly or as relative ratio measurements from present or stored values Statistical capabilities include the computation of Min Max Max Min Mean and Standard Deviation Additional features such as digital and analog filtering and data storage of up to 250 000 readings per channel are also offered Newport s experience with calibration together with N I S T calibration traceability and high precision optical power meters provide users with accurate measurements and exceptional inter instrument correlation In R amp D QA QC and manufacturing environments the 1931 2931 Series power meters enable users to benefit from high correlation between multiple 22 2 2 2 3 2 4 2 5 General Information locations at a price to performance ratio second to none Among all the other practical tools provided remote controlling with a computer and synchronization to other instruments are simplified with th
35. GFILTER command selects the analog filter setting Argument Value Filter Setting Setting 0 None l 12 5 kHz 2 1 kHz 3 5 Hz Related Commands PM ANALOGFILTER PM ANALOGFILTER Description Analog filter select query Syntax PM ANALOGFILTER Remarks The PM ANALOGFILTER query returns an integer indicating the present analog filter setting Response Value Filter Setting Setting 0 None l 12 5 kHz 2 1 kHz 3 5 Hz Related Commands PM ANALOGFILTER PM ANALOG IMP Description Analog output impedance select command Syntax PM ANALOG IMP value Remarks The PM ANALOG IMP command selects the analog output impedance Argument Value Output Impedance Value 0 50 Q l 100 kQ 2 1 MQ Related Commands PM ANALOG IMP 78 Communication Command Reference 8 3 3 15 PM ANALOG IMP Description Syntax Remarks Argument Value Analog output impedance query PM ANALOG IMP The PM ANALOG IMP query returns an integer indicating the present analog output impedance Value Output Impedance 0 50 Q l 100 kQ 2 1 MQ Related Commands PM ANALOG IMP 8 3 3 16 PM ANALOG OUT Description Syntax Remarks Argument Range Analog output range select command PM ANALOG OUT range The PM ANALOG OUT command selects the analog output range Value Max Output 0 1 V l 2 V 2 5V 3 10 V Related Commands PM ANALOG OUT 8 3 3 17 PM ANALOG OUT Description Syntax Remarks Response Range Analog output range
36. LTer PM Lambda PM Lambda PM MAX Lambda PM MAX Power PM MIN Lambda PM MIN Power PM MEAS TIMEOUT PM MEAS TIMEOUT PM MODE Number of Parameters l NONE l NONE l NONE l NONE NONE NONE NONE NONE NONE NONE NONE Function Sets the backlight level of the display and the keypad Returns the backlight level of the display and the keypad Sets the analog filter Returns the analog filter setting Sets the analog output impedance to desired value Returns the analog output impedance value Sets the analog output range to the desired level Returns the analog output range Selects if the attenuator s calibration data is included for power calculation Returns setting if attenuator data should or should not be used when calibrating the power meter Gets the attenuator serial number Sets the power meter ranging to manual or automatic Returns 1 if automatic power meter ranging is selected Returns the calibration date of the detector Returns the temperature at which the calibration was performed Selects the power meter channel to display and control Returns the power meter channel currently selected Sets the power measurement correction settings Power measurement correction settings query Returns the model number of the detector Returns the detector surface area Returns the serial number of the detector Sets the digital filter window size Returns the digital filter window size Detector Power query
37. M CHANnel Description Syntax Remarks Response channel Power meter channel query PM CHAN The PM CHAN query returns the power meter channel currently selected Value Description int Currently selected power meter channel l Related Commands PM CHAN PM CORR Description Syntax Remarks Argument value l value2 Power measurement correction settings PM CORR valuel value2 value3 The PM CORR command sets the power measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power 1s calculated using the formula provided below Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 82 8 3 3 28 8 3 3 29 8 3 3 30 Communication Command Reference value3 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM CORR Description Syntax Remarks Response value l value2 value3 Power measurement correction settings query PM CORR The PM CORR command returns the power measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power 1s calculated using the formula provided below Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 d
38. Model 1931 2931 Senes Single and Dual Channel Optical Meters Users Manual LD Newport Experience Solutions Preface Preface EU Declaration of GS Conformity Newport We declare that the accompanying product identified with the CE mark complies with requirements of the Electromagnetic Compatibility Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC Model Number 1931 C 2931 C Year CE mark affixed 2006 Type of Equipment Electrical equipment for measurement control and laboratory use Standards Applied Compliance was demonstrated to the following standards to the extent applicable BS EN61326 1 1997 A1 A2 A3 Electrical equipment for measurement control and laboratory use EMC requirements Performance criteria B was achieved during immunity tests This equipment meets the CISPR 11 Class A Group 1 radiated and conducted emission limits BS EN 61000 3 2 2001 Harmonic current emissions Class A BS EN 61000 3 3 2002 Voltage fluctuations and flicker BS EN 61010 1 2001 2 Edition Safety requirements for electrical equipment for measurement control and laboratory use Ps an LO PIREA a Bruno Rety Dan Dunahay Group Director of PPT Instrument and Motion Europe Director of Quality Systems Zone Industrielle 1791 Deere Avenue 45340 Beaune la Rolande France Irvine Ca USA Preface Firmware and User s Manual Updates Dear Customer In an effort to keep the
39. NE Returns external trigger edge select 98 PM TRIG HOLDoff l Set external trigger holdoff time 98 PM TRIG HOLDoff NONE Returns external trigger holdoff time 99 PM TRIG START l Set the optional start event 99 PM TRIG START NONE Returns optional start event 99 PM TRIG STOP l Set the optional stop event 100 PM TRIG STOP NONE Returns optional start event 100 PM TRIG STATE l Set the trigger state 100 PM TRIG STATE NONE Returns the trigger state 101 PM TRIG VALUE l Set the measurement level for trigger stop condition 101 PM TRIG VALUE NONE Returns the measurement set level for trigger stop condition 101 PM TRIG TIME l Set the time duration for trigger stop condition 102 PM TRIG TIME NONE Returns the time duration for trigger stop condition 102 PM UNITs l Selects the units for readings 102 PM UNITs NONE Returns an integer indicating the selected units 102 PM ZEROSTOre NONE Sets the zeroing value with the present reading 103 PM ZEROVALue l Sets the zeroing value 103 PM ZEROVALue NONE Gets the zeroing value 103 Table 3 Tree Level Commands Queries Summary 8 3 2 Display Commands 8 3 2 1 DISP BRIGHT Description Display brightness command Syntax BRIGHT brightness Remarks The BRIGHT command controls the brightness of the instrument display Argument Type Description 8 3 2 2 8 3 3 8 3 3 1 8 3 3 2 Communication Command Reference 73 Brightness int Brightness in levels from 0 to 7 Related Commands DISP BRIGHT DISP BRIGHT
40. PM AUTO command sets the power ranging to either manual or automatic Argument Value Description mode 0 Manual power meter ranging l Automatic power meter ranging Related Commands PM AUTO PM RANge 8 3 3 22 PM AUTO Description Auto range mode query Syntax PM AUTO Remarks The PM AUTO query returns a value to indicate if auto ranging is enabled or not Response Value Description mode 0 Manual power meter ranging l Automatic power meter ranging Related Commands PM AUTO PM RANG 8 3 3 23 PM CALDATE Description Detector calibration date query Syntax PM CALDATE Remarks The PM CALDATE query returns the calibration date of the detector For example 21JUN1999 Response Type Description Date string DDMMMYYYYY 8 3 3 24 PM CALTEMP Description Temperature at which detector was calibrated query Syntax PM CALTEMP Remarks The PM CALTEMP query returns the temperature degrees Celsius at which the detector was calibrated When no detector is present no detector is returned Response Type Description 8 3 3 25 8 3 3 26 8 3 3 27 Communication Command Reference 81 temperature PM CHANnel Description Syntax Remarks Argument Channel float Returns the temperature at which the detector was calibrated Select power meter channel PM CHAN channel The PM CHAN command selects the power meter channel for control Type Description int Power meter channel Related Commands PM CHAN P
41. TRIG STOP PM UNITs Description Units select Syntax PM UNITS units Remarks The PM UNITS command selects the units for readings Argument Value Description units 0 Amps 2 Watts 3 Watts cm 6 dBm Related Commands PM MODE PM UNITs Description Units query Syntax PM UNITS Remarks The PM UNITS query returns an integer indicating the units selected Response Value Description Communication Command Reference 103 units 0 Amps 2 Watts 3 Watts cm 6 dBm Related Commands PM UNITS 8 3 3 96 PM ZEROSTOre Description Zero value set command Syntax PM ZEROSTO Remarks The PM ZEROSTO command sets the zeroing value with the present reading Argument Type Description none Related Commands PM ZERO PM ZEROVAL 8 3 3 97 PM ZEROVALue Description Zero value set command Syntax PM ZEROVAL value Remarks The PM ZEROVAL command sets the zeroing value When enabled zeroing subtracts the stored zero value from readings before making measurement calculations Argument Type Description Value float Zeroing value Related Commands PM ZERO PM ZEROSTO 8 3 3 98 PM ZEROVALue Description Zero value query Syntax PM ZEROVAL Remarks The PM ZEROVAL query returns the zero value Response Type Description value float Zero exponent Related Commands PM ZEROVAL PM ZERO 104 Communication Command Reference This page is intentionally left blank 9 Principles Of Operation 9 1 Introduction The 1931 2931 S
42. This license specifically prohibits any other use of the software programs or functions or inclusion of additional software programs or functions that do not directly support the limited functionality on the DEVICE Notwithstanding the foregoing you may install or enable on a DEVICE systems utilities resource management or similar software solely for the purpose of administration performance enhancement and or preventive maintenance of the DEVICE e If you use the DEVICE to access or utilize the services or functionality of Microsoft Windows Server products such as Microsoft Windows Server 2003 or use the DEVICE to permit workstation or computing devices to access or utilize the services or functionality of Microsoft Windows Server products you may be required to obtain a Client Access License for the DEVICE and or each such workstation or computing device Please refer to the end user license agreement for your Microsoft Window Server product for additional information e NOT FAULT TOLERANT THE SOFTWARE IS NOT FAULT TOLERANT NEWPORT HAS INDEPENDENTLY DETERMINED HOW TO USE THE SOFTWARE IN THE DEVICE AND MS HAS RELIED UPON NEWPORT TO CONDUCT SUFFICIENT TESTING TO DETERMINE THAT THE SOFTWARE IS SUITABLE FOR SUCH USE e NO WARRANTIES FOR THE SOFTWARE The SOFTWARE is provided AS IS and with all faults THE ENTIRE RISK AS TO SATISFACTORY QUALITY PERFORMANCE ACCURACY AND EFFORT INCLUDING LACK OF NEGLIGENCE IS WITH YOU ALSO THERE IS NO
43. Time Command Syntax PM TRIG HOLDoff lt time gt Parameters The parameter lt time gt is of type lt number gt and is an integer from 0 to 1000 lt time gt is the delay in milliseconds for the trigger to take effect Function This command sets the delay interval before the trigger takes effect Communication Command Reference 99 Related Commands PM TRIG EXTernal PM TRIG EXTernal PM TRIG HOLDoff 8 3 3 83 PM TRIG HOLDoff Description External Trigger Holdoff Time Query Syntax PM TRIG HOLDoff Parameters None Function This query returns the delay in milliseconds before the trigger takes effect Related Commands PM TRIG EXTernal PM TRIG EXTernal PM TRIG HOLDoff 8 3 3 84 PM TRIG START Description This command sets the optional start event Syntax PM TRIG START option Parameters The parameter lt option gt is of type lt number gt and 1s an integer from 0 to 3 Argument Value Description option 0 Continuous measurement l Measurement starts when an external trigger occurs 2 Measurement starts when a designated Soft key is pressed 3 Measurement starts when PM TRIG STATE 1 command is issued Related Commands PM TRIG START 8 3 3 85 PM TRIG START Description Trigger START Query Syntax PM TRIG START Parameters None Function This query returns the TRIGGER START condition Related Commands PM TRIG START 100 Communication Command Reference 8 3 3 86 PM TRIG STOP Description This comman
44. WARRANTY AGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR AGAINST INFRINGEMENT IF YOU HAVE RECEIVED ANY WARRANTIES REGARDING THE DEVICE OR THE SOFTWARE THOSE WARRANTIES DO NOT ORIGINATE FROM AND ARE NOT BINDING ON MS e No Liability for Certain Damages EXCEPT AS PROHIBITED BY LAW MS SHALL HAVE NO LIABILITY FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES ARISING FROM OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE SOFTWARE THIS LIMITATION SHALL APPLY EVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PURPOSE IN NO EVENT SHALL MS BE LIABLE FOR ANY AMOUNT IN EXCESS OF U S TWO HUNDRED FIFTY DOLLARS U S 250 00 e Restricted Uses The SOFTWARE is not designed or intended for use or resale in hazardous environments requiring fail safe performance such as in the operation of nuclear facilities aircraft navigation or communication systems air traffic control or other devices or systems in which a malfunction of the SOFTWARE would result in foreseeable risk of injury or death to the operator of the device or system or to others e Limitations on Reverse Engineering Decompilation and Disassembly You may not reverse engineer decompile or disassemble the SOFTWARE except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation SOFTWARE as a Component of the DEVICE transfer This license may not be shared transferred to or used concurrently on different
45. a Figure 16 2931 C Rear Panel Pay Outs ictoseis haavetasataiianedovenietious wasevetaes Figure 17 PM1 RACK mounting kiteeseen xiii Preface Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 PM2 RACK momin RAL sentences tartoaaticcotsusauatcnteascSucdendaoatieses 33 Mounting details for the PM1 RACK mounting kit 0 34 Front Panel Key Steenen en R 35 POWE WUC Wh see E E 35 Navigation Selection and Setup Enter keys cccccccecsseeseeeeeeeees 36 Mams CEG Cte oh a hee atch dredges hana eselabnctated cn Geeta data ehoaand ea s hen leads oe 36 Measurement Stn OS Sree vise te caneses setae e E iae ees 327 Chamel A pimay eisir oei AA E OAE i 3l Channel B Primal yore eotetentabuan aaa ce eeanes 37 SOLLKEYS eriaren E EO 38 Dedicated KEYS crssrern iier E 38 Manua Range Mode coseno E So edosraaalatiateleskctiaaeheiae 39 AMERI e MOda E E E E 39 This screen is displayed after pressing the Config soft key 39 MOG selection SChe Cio 32 2 sss necin eehactees O 40 Measure
46. a minimum when adjusting the optical power Vertical Chart When the Vertical Chart is selected the numeric display is moved in the upper right corner just below the secondary channel display The vertical chart scrolls down representing a snapshot of the last measurements The chart can be cleared with the Clear soft key The maximum peak value of the chart is the maximum measurement of the entire chart since the last clear Below the chart there is a line with the chart maximum and minimum in major units On the same line in the middle there is information about the chart zoom level e g 1x and the number of samples processed per chart line e g 3 Avg Figure 57 The chart has 100 lines each line having a white and red color When the system fills up a line it looks at a number of samples defined by the number displayed below the chart Analog 0 704 Uv fyl T i E G A C oO nt n i 400 nm 40 34 0 0 54 09 pW 109 09 pw hint Press left right arrow key to Swit ch channe E Statistics Math Figure 56 Analog Needle display 0 678 uw Figure 57 Vertical chart with 10 measurements per line 3 1989 w Peak 0 000 Figure 58 Vertical chart with 1l measurement per line Figure 57 shows 1x 3 Avg which means that while painting a line the system looks at the previous 3 measurements It displays with white the minimum value in the 3 measurement list and with red the maximum value in the s
47. a store queue to be cleared 706 Digital Filter Interval changed must not be greater than Data Store interval The digital filter interval cannot be greater than the data store interval 707 Digital Filter Disabled with External Trigger Digital filter must be disabled during external trigger mode 708 There is no new data for a statistics update No new data has been stored in the data store since the last statistics update 709 Statistics are not calculated while Data Store is running User attempted to compute statistics while data store was active Turn off data store and compute 124 Appendix B This page is intentionally left blank 13 Appendix C Legacy Commands Reference Name DISP BRIGHT DISP BRIGHT PM ANALOGFILTER PM ANALOGFILTER PM ANALOG OUT PM ANALOG OUT PM ATT PM ATT PM ATTSN PM AUTO PM AUTO PM CALDATE PM CALTEMP PM CHANnel PM CHANnel PM DETMODEL PM DETSN PM DIGITALFILTER PM DIGITALFILTER PM DS BUFfer PM DS BUFfer PM DS CLear PM DS Count PM DS ENable PM DS ENable PM DS GET PM DS INTerval PM DS INTerval PM DS SAVEBUFER PM DS SIZE PM DS SIZE PM DS UNITs PM FILTer PM FILTer PM Lambda PM Lambda Number of Parameters l NONE l NONE l NONE Function Sets the backlight level of the display and the keypad Returns the backlight level of the display and the keypad Sets the analog filter Returns the analog filter setting Sets the anal
48. aa 763 7 63nA 76 3nA 381nA Bandwidth 170 kHz 140 kHz RMS Measurement Maximum Pulse Rate 10 kHz Accuracy racy ee Output Full Scale fete Load gt 100 kQ Full Scale Voltage Load 50 lt Accuracy 1 0 10 1 0 iok 1 0 O 10 1 0 O 10 Trigger Level Programmable Level 0 100 Full Scale Resolution 0 39 Full Scale With 5Hz filter on Listed signal ranges specify meter capability Available signal ranges are detector dependent s Maximum measurable signal is detector dependent While the maximum repetition range may equal the bandwidth it really depends on the signal duty cycle or the signal shape The instrument bandwidth is determined by the detector used Please refer to Newport Corporation s complete offering on detector type The specified bandwidth is measured from the instrument input detector to the Analog Output BNC 2 2 8 2 9 2 10 2 11 General Information 25 Unpacking and Handling It is recommended that the Models 1931 2931 Series Optical Power Meters be unpacked in a lab environment or work site Unpack the system carefully small parts and cables are included with the instrument Inspect the box carefully for loose parts before disposing of the packaging You are urged to save the packaging material in case you need to ship your equipment in the future Inspection for Damage The Models 1931 2931 Series Optical Power Meters are c
49. acquisition mode 9 PM Power NONE Returns the power in the selected units 92 PM PWS NONE Returns the power with status 92 PM RANge l Selects the gain stage when making readings with the detector 92 head within a range from 0 to 6 with zero being the highest PM RANge NONE Returns an integer indicating the current range 93 PM REF VALue l Sets the user reference value for use in relative or dB readings 93 PM REF VALue NONE Returns the user reference value 93 PM REF STOre NONE Sets the user reference value for use in relative or dB readings 94 as the present reading PM RESPonsivity NONE Gets the responsivity currently used for making power 93 calculations PM RUN l Disables or enables the acquisition of data 94 PM RUN NONE Returns the present acquisition mode 94 PM SPOTSIZE l Sets the detector spot size 95 PM SPOTSIZE NONE Returns the detector spot size 95 PM STAT MAX NONE Returns statistics buffer maximum value 95 PM STAT MEAN NONE Returns statistics buffer mean value 95 PM STAT MIN NONE Returns statistics buffer minimum value 96 PM STAT MAXMIN NONE Returns statistics buffer maximum minimum value 96 PM STAT SDEViation NONE Returns statistics buffer standard deviation value 96 PM Temp NONE Returns the 918 detector s temperature in degrees Celsius 96 PM TRIG EXTernal l Set external trigger enable 97 PM TRIG EXTernal NONE Returns external trigger enable 97 PM TRIG EDGE l Set external trigger edge select 98 PM TRIG EDGE NO
50. ame list 4 11 System Operation 55 The user can change the number of measurements by selecting the Average soft key and then pressing the Right or Left Navigation keys to increase respectively decrease the number of measurements If one measurement 1s selected the chart color is white because the maximum and minimum per line are the same Figure 58 Due to one measurement display per line the chart speed increases If the Zoom soft key is pressed the user can zoom into the chart with the Up and Down Navigation keys Firmware Upgrade Procedure Firmware Upgrade is an easy straight forward process Simply copy firmware files PM2931APP EXE and XMLFILE2 XML to a WinCE compatible USB Flash Drive and then plug it into the USB connector on the front of the instrument Then wait a few seconds for the instrument to recognize the USB Flash Drive The power meter will detect the new firmware files and will ask if you want to download the files Press the Yes softkey to start the upgrade process The power meter will instruct you to restart once the upgrade is successful Restart the power meter by turning it OFF and back ON The power meter will restart running the new firmware New firmware files may be available either through the Newport web site http www newport com at the product page or through your local Newport application specialist 56 System Operation This page is intentionally left blank 5 5 1 5 2 Per
51. an rent lend or otherwise transfer the backup copy to another user End User Proof of License If you acquired the SOFTWARE on a DEVICE or on a compact disc or other media a genuine Microsoft Proof of License Certificate of Authenticity label with a genuine copy of the SOFTWARE identifies a licensed copy of the SOFTWARE To be valid the label must be affixed to the DEVICE or appear on Newport s software packaging If you receive the label separately other than from Newport it is invalid You should keep the label on the DEVICE or packaging to prove that you are licensed to use the SOFTWARE Product Support Product support for the SOFTWARE is not provided by MS Microsoft Corporation or their affiliates or subsidiaries For product support please refer to the Newport support number provided in the documentation for the DEVICE Should you have any questions concerning this EULA or if you desire to contact Newport for any other reason please refer to the address provided in the documentation for the DEVICE Termination Without prejudice to any other rights Newport may terminate this EULA if you fail to comply with the terms and conditions of this EULA In such event you must destroy all copies of the SOFTWARE and all of its component parts Export Restrictions You acknowledge that SOFTWARE is subject to U S and European Union export jurisdiction You agree to comply with all applicable international and national laws that apply to
52. an be seen in Figure 30 where the range is 1 000 W indicating a manual mode If the instrument is in Auto Range Mode the left most key is labeled Manual The user may return to the main screen by pressing the ESC key e The other option is to press the right most Soft key which is labeled Config This action displays the Range Configuration screen Here the user can select a certain range or even Auto Range with the Navigation Enter keys Once a range is selected the instrument returns to the main screen While in Range Configuration screen the user may cancel the selection by hitting the ESC key 39 Node CW Cont R 3 ng a 4 1 T 0 uv H A AUD im 37 89 Hint Press Setup to enter measurement setup Auto 3 Figure 29 uE J C onfi g sal Manual Range mode Mode CW Cont Range Auto ADU nm 37 89 Hint Press Setup to enter measurement setup METI Contig Figure 30 Auto Range mode Figure 31 This screen is displayed after pressing the Config soft key 40 System Operation Mode The Mode key displays a screen as in Figure 32 Using Navigation Enter keys the user can select different measurement modes or display modes according to his application The ESC key cancels the selection and brings the instrument back to the main screen Hold The Hold key toggles between holding the current measurement or running freely When in Hold mode the numeric display freezes and th
53. ange Selection and Range Type Rng type The Range field has dual functionality System Operation 43 One is to display the current selected range whether it was selected by the user in Manual Range Mode or by the system in Auto Range Mode The other is to allow the user to change the range With the Navigation Selection keys bring the cursor on top of the Range field Hit the Enter key A drop down menu appears with the available ranges in the selected units Select the desired range and hit Enter If the unit was in Auto Range mode once a range 1s selected here it will switch the system to Manual Range Mode To bring it back to Auto Range Mode navigate to Range Type Rng type and change the range to Auto Range Mode Also the user has another option to bring the back into the Auto Range Mode This can be done from the default screen where the user can change the Range to Auto Range Mode with the Range Dedicated key see Section 4 1 6 Attenuator On Off If the detector 1s equipped with an integrated attenuator e g 918D Series the 1931 2931 Series detects its status ON or OFF and displays it in the Attenuator field The user has the option to manually set the attenuator to ON or OFF for detectors that have attenuators that can be manually mounted on the detector e g 818 Series To change the attenuator status bring the cursor on top of the Attenuator field Hit the Enter key A drop down menu appears with the ON
54. arefully packaged at the factory to minimize the possibility of damage during shipping Inspect the box for external signs of damage or mishandling Inspect the contents for damage If there is visible damage to the instrument upon receipt inform the shipping company and Newport Corporation immediately WARNING Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged Damaged equipment may present additional hazards to you Contact Newport technical support for advice before attempting to plug in and operate damaged equipment Available Options and Accessories Newport Corporation also supplies temperature controlled mounts lenses and other accessories Please consult with your representative for additional information Parts List The following is a list of parts included with the 1931 2931 Series Optical Power Meters 1 User s Manual Hardcopy or CD 2 Software Drivers and Utilities CD 3 Power cord 4 Two fuses If you are missing any hardware or have questions about the hardware you have received please contact Newport Corporation Choosing and Preparing a Suitable Work Surface The Models 1931 2931 Series Optical Power Meters may be placed on any reasonably firm table or bench during operation The front legs of the unit can be pulled out to tilt the unit at an angle if desired 26 2 12 2 13 General Information Provide adequate dista
55. at either 100 or 120VAC and applied power is above 180VAC RMS 3 System Overview 3 1 Startup Procedure WARNING To avoid electrical shock hazard connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury Provided that the power meter has been installed in an appropriate environment and its power cord is connected to a working electrical outlet power up the power meter by pressing the power button on the lower left corner of the front panel For precise accuracy 1931 2931 Series power meters should be allowed to warm up for one hour before being used for measurements 3 2 Front Panel Layout The front panel layout is the same for both 1931 C and 2931 C instruments eo Pdowoort Power Meter Model 2931 C Figure 14 Front Panel Layout 28 3 2 1 3 2 2 3 3 3 3 1 System Overview Front Panel Elements On the front panel of the 1931 2931 Series there are the following elements A faceplate with an active color liquid crystal display USB A connector Power switch Setup Enter and Esc keys Rubberized horizontal left right and vertical up down arrow keys Four rubberized blank keys below the display referred to as soft keys later in the manual as their function depends on the text on the screen above the key Six rubberized buttons with dedicated functions Range Mode Hold Filter Lambda A Zero Un
56. ate how the meter must be configured in order to obtain a calibrated optical measurement Analog signal flow is independent of whether single or continuous measurements are made 106 9 3 Principles of Operation Responsivity units and signal flows for the various detector families are listed in Table 4 Detector Family Resp Units Mode Amplifier Peak Path Baseine es Low Power A W Peak Peak a a eee ee Table 4 Analog Signal Flow Paths Digitized Signal Flow An analog to digital converter captures the input signal The input signal has the units of current or voltage depending upon how the input amplifier chain was configured Note In this manual the digitized signal may be referred as sampled signal or samples This digitized signal moves through a number of process steps that may or may not alter the digitized value depending upon the operating state of the meter Each of these possible processing steps is discussed further Digital Filter If the digital filter annunciator Dig or Digital is on Section 2 3 4 the filter output is the average of the most recent 10 100 1000 10000 samples The number of samples is selectable by the user with the Filter menu Also The user can change the number of samples When less than the selected number of samples has been acquired since the last reset of the digital filter the output is the average of all the values received The digital filter is reset when the Model 1931 2931 is
57. ce the user will have to manually select attenuator option status on the meter to obtain the proper power or signal readings Peak to Peak Power Measurements This section describes the procedure for making basic optical peak to peak power measurements With a 918D Low Power Detector connected to the meter turn the meter on Set the Mode to Pk Pk Continuous Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Illuminate the detector and note the displayed value This reading is the peak to peak optical power observed by the detector Accurate peak to peak power measurements can be made for pulse repetition rates up to 20 kHz Power Ratio and Power Reference measurements This section describes how to use the mathematical functions in the power meter to obtain dB Power or signal comparison or ratio measurements For single detector you can obtain a ration dB or other comparison in reference to a previously saved value Refer to Section 4 8 for information o setting the reference values For dual detectors you can obtain a live ratio or other comparison of the two channels displayed c Use soft key labeled Math to enter the math function screen 60 Performing Basic Measurements 5 6 d Select the channels and the functions by using the up down right and left arrow keys Use the Menu Enter key only after all your selections are made Example 1 In order
58. clearly marked with the RMA and we will either repair or replace it at our discretion Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA E mail rma service newport com When calling Newport Corporation please provide the customer care representative with the following information Your Contact Information Serial number or original order number Description of problem 1 e hardware or software To help our Technical Support Representatives diagnose your problem please note the following conditions Is the system used for manufacturing or research and development What was the state of the system right before the problem Have you seen this problem before If so how often Can the system continue to operate with this problem Or is the system non operational Can you identify anything that was different before this problem occurred yiii Preface IMPORTANT NOTE Before plugging the instrument into a PC via a USB communication port please make sure that the USB Drivers are installed Run Setup exe from the Software CD that came with your product The installation program will configure the PC with the 1931 2931 Series USB drivers Preface Table of Contents EU Declaration of Conformity eeeeeeeeeeeeeeeeeeesseeesessssssssssrrrrrrrrrees il VV CLI UII a casa sneteein esta aciag sak oe seated taehanindabadaciassalotiays V Tech
59. computers The SOFTWARE is licensed with the DEVICE as a single integrated product and may only be used with the DEVICE If the SOFTWARE is not accompanied by a DEVICE you may not use the SOFTWARE You may permanently transfer all of your rights under this EULA only as part of a permanent sale or transfer of the DEVICE provided you retain no copies of the SOFTWARE If the SOFTWARE is an upgrade any transfer must also include all prior versions of the SOFTWARE This transfer must also include the Certificate of Authenticity label The transfer may not be an indirect transfer such as a consignment Prior to the transfer the end user receiving the SOFTWARE must agree to all the EULA terms e Consent to Use of Data You agree that MS Microsoft Corporation and their affiliates may collect and use technical information gathered in any manner as part of product support services related to the SOFTWARE MS Microsoft Corporation and their affiliates may use this information solely to improve their products or to provide customized services or technologies to you MS Microsoft Corporation and their affiliates may disclose this information to others but not in a form that personally identifies you e Links to Third Party Sites You may link to third party sites through the use of the SOFTWARE The third party sites are not under the control of MS or Microsoft Corporation and MS or Microsoft are not responsible for the contents if any third party sites any l
60. ctor covered a reading of the dark current may be made Next remove the material that 1s covering the detector and take another reading The difference is the ambient light level NOTE Changes in ambient light levels can occur from such factors as turning room lights on or off or by moving people or equipment Remember if you can see your detector element then your detector can see the light bouncing off you The effects of ambient light are greatly reduced when using a fiber connectorized signal input to the detector If free space beam measurements are desired using an attenuator will often improve the signal to ambient signal noise level Wavelength specific filters such as optical cutoff band pass or spike filters can be used if the signal wavelength spectrum permits Other techniques to reduce stray light include using apertures placing the detector in a box or other housing to shield the surface from light or air currents and turning off room and other polluting light Sources 9 7 4 Principles of Operation 111 Signal Filtering The 1931 2931 Series offer the user the option to filter the detector signal There are two programmable filters that can be used individually or together to condition the detector signal the Analog Filter and the Digital Filter The Analog Filter is a hardware based programmable low pass filer The user can select the following settings 5Hz IkHz 12 5kHz and 250kHz This flexibility is offered
61. cution Errors Execution Errors are associated with the interpretation of the converted commands and parameters received Incorrect parameter values and numerical range errors are types of execution errors Any execution error will cause the Execution Error bit bit 4 in the Standard Event Status Byte to be set 1 Out of memory This error is caused by an internal program fault and may be followed by an automatic instrument reset 201 Value Out Of Range This error will occur if a parameter is out of a valid range or not in the set of valid parameters for a given command 214 Exceeds Maximum Length Generated when the command exceeds the maximum command length Try shortening the command string 217 No saved information in recalled bin Generated when the user attempts to recall a bin which has no previous stored data 301 Query Error The Query Error occurs when the instrument is in the midst of transmitting a message Over a communication bus and the instrument exits remote mode 303 Input Buffer Overflow Error generated when the system parser runs out of space during reception of command It may occur 1f commands are not terminated correctly Input buffer is 1 024 characters long 304 Output Buffer Overflow Error generated when the system parser runs out of space for query results It may occur if query results in too much data to be returned in a single response or if multiple command queries are issued but not
62. d sets the optional stop event Syntax PM TRIG STOP lt option gt Parameters The parameter lt option gt is of type lt number gt and is an integer from 0 to 6 Argument Value Description option 0 The measurement never stops l Measurement stops when an external trigger occurs 2 Measurement stops when a designated Soft key is pressed 3 Measurement stops when PM TRIG STATE 0 command is issued 4 Measurement stops when a pre specified measurement level PM TRIG VALUE is reached 5 Measurement stops when a pre specified time interval PM TRIG TIME from TRIGGER START has been reached Related Commands PM TRIG STOP 8 3 3 87 PM TRIG STOP Description Trigger STOP Query Syntax PM TRIG STOP Parameters None Function This query returns the TRIGGER STOP condition Related Commands PM TRIG STOP 8 3 3 88 PM TRIG STATE Description This command sets the trigger state Syntax PM TRIG STATE lt option gt Parameters The parameter lt option gt is of type lt number gt and is an integer 0 or 1 Argument Value Description option 0 Trigger is armed The system waits for a Communication Command Reference 101 trigger start event to occur in order to make a measurement l System 1s triggered and at least one measurement occurred Related Commands PM TRIG STATE 8 3 3 89 PM TRIG STATE Description Trigger STATE Query Syntax PM TRIG STATE Parameters None Function This query returns the TRIGGER STATE con
63. d to you by MS Microsoft Corporation or their subsidiaries then you will be licensed by such entity under the same terms and conditions of this EULA except that 1 MS Microsoft Corporation or their subsidiaries providing the Supplemental Components will be the licensor with respect to such Supplemental Components in lieu of Newport for the purposes of the EULA and 11 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW THE SUPPLEMENTAL COMPONENTS AND ANY IF ANY SUPPORT SERVICES RELATED TO THE SUPPLEMENTAL COMPONENTS ARE PROVIDED AS IS AND WITH ALL FAULTS ALL OTHER DISCLAIMERS LIMITATION OF DAMAGES AND SPECIAL PROVISIONS PROVIDED BELOW AND OR OTHERWISE WITH THE SOFTWARE SHALL APPLY TO SUCH SUPPLEMENTAL COMPONENTS MS Microsoft Corporation or their subsidiaries reserve the right to discontinue any Internet based services provided to you or made available to you through the use of the SOFTWARE Recovery Media If SOFTWARE is provided by Newport on separate media and labeled Recovery Media you may use the Recovery Media solely to restore or reinstall the SOFTWARE originally installed on the DEVICE Backup Copy You may make one 1 backup copy of the SOFTWARE You may use this backup copy solely for your archival purposes and to reinstall the SOFTWARE on the DEVICE Except as expressly provided in this EULA or by local law you may not otherwise make copies of the SOFTWARE including the printed materials accompanying the SOFTWARE You may not lo
64. derstanding the Main Screen The main screen is displayed after startup Figure 14 The middle portion of the main screen 1s a real time display of power measured in last used units and the lower half of the main screen is a row of four labels for actions that the keys below them will activate The top of this screen has the channel settings for the focus channel and a smaller reading for the non focus channel B in the figure When an annunciator label is visible its function is enabled If the annunciator appears on the display as an unlabeled key the function it represents 1s currently disabled Annunciators loosely correspond to keypad keys which are used either alone or in combination with the navigation and selection keys to control annunciator functions Rear Panel Layout Elements That Vary by Model on back panel Single channel power meters have the processing electronics installed on CH A while dual channel power meters have both CH A and CH B installed Input Connectors The input connectors are on the rear panel 1931 C and 2931 C power meter models support input from external detectors through DB15 detector connectors Input channels on dual channel power meters are labeled CH A and CH B A Trigger input offers the possibility of synchronizing the power meter measurements with external events 3 3 2 System Overview 29 Output Connectors Power meters in the 1931 2931 C series support one analog output
65. dition Related Commands PM TRIG STATE 8 3 3 90 PM TRIG VALUE Description This command sets the measurement level that indicates a trigger stop condition The power meter will stop taking further measurements if a measurement taken exceeds the value specified by this command and if trigger stop option 1s set to measurement level Syntax PM TRIG VALUE value Parameters The parameter lt value gt is of type lt number gt Argument Value Description value float Measurement level Related Commands PM TRIG STOP 8 3 3 91 PM TRIG VALUE Description This command returns the measurement level that indicates a trigger stop condition Syntax PM TRIG VALUE Parameters None Related Commands PM TRIG STOP 102 8 3 3 92 8 3 3 93 8 3 3 94 8 3 3 95 Communication Command Reference PM TRIG TIME Description This command sets the time duration that indicates a trigger stop condition The power meter will stop taking further measurements 1f the time from trigger start exceeds time duration specified by this command and if trigger stop option is set to time Syntax PM TRIG TIME value Parameters The parameter lt value gt is of type lt number gt Argument Value Description value int Time milli seconds Related Commands PM TRIG STOP PM TRIG TIME Description This command returns the time duration that indicates a trigger stop condition Syntax PM TRIG TIME Parameters None Related Commands PM
66. e upper left corner of the display reads Hold see Figure 33 Filter The Filter key allows the user to apply Analog or Digital Filters or both to the detector signal This key brings a screen as in Figure 34 The Soft keys are reconfigured for the filter selection Counting from left to right the first key applies only the Analog filter to the detector signal the second applies only the Digital Filter and the third applies both filters When the filters are selected the corresponding label above the soft key has a highlighted background and the filter name is displayed in the upper left corner EACW Continuous _ _ Measurement Mode _ Numeric CW Single Min Max bar CW Integrate Analog needle Pk Pk Continuous __Vertical chart Pk Pk Single RMS Figure 32 Mode selection screen 2 0 7 ff uw 8 81 228 uw Mode CW Cont Range Auto 2 Te E Ai ia A 400 nm 40 46 Hint Press lett nght arrow key to switch channels Figure 39 Measurement is on hold Mode CW Cont Range Auto A 400 nm 37 89 Hint Press Setup to enter measurement setup Digita An Dg Con fi g Ei Figure 34 Filter selection screen System Operation 41 The fourth Soft key is used for filter configuration When selected a screen as in Figure 35 is displayed Using the Navigation Enter keys the user can select the filter of choice If the Enter key is not pressed the ESC key cancels the selection and brings
67. e CW Cont Num Digits 4 System Trigger__ Correction _ Figure 24 Measurement Settings screen Refer to Section 4 2 for more information about the measurement settings Esc Key The Esc key Figure 20 and Figure 22 is used to cancel the current action When in a secondary screen or menu it will close the current screen or menu and the instrument will return to the main screen Figure 23 Navigation and Selection Keys Navigation through and selection of data in the display is done with the top right group of four arrows keys and with the Setup Enter key Figure 22 Left and Right keys have dual functionality Channel Swapping and Navigation Channel Swapping When the instrument displays the main screen pressing the Left or Right keys will cause the displayed channels A and B to be swapped If the meter displays channel A as primary channel and B as secondary the top left corner shows A and the main numeric field in the middle of the screen shows the measurement in progress on channel A The secondary channel B in this case is displayed in the upper right corner Figure 25 An Dig 0 7747 WV Mode CW Cont Mode CW Cont Range Auto Range Auto i i 780 nmm 400 nm 40 46 Hint Press left right arrow key to switch channels Hint Press left right arrow key to switch channels Statistics Math Figure 25 Channel A primary Figure 26 Channel B primary OTET Statis
68. e continued accuracy of power meter measurements Please refer to the Maintenance and Troubleshooting section for contact information for re calibration of your power meter General Information 23 2 6 Specifications 2 6 1 Physical Specifications Dimensions 5 25 x 12 11 x 8 50 in 133 x 308 x 216 mm Weight max 12 4 lb Enclosure Metal case painted Connectors Optical Detector 15 Pin D Sub BNC Analog Output Trigger Output Trigger Input 9 Pin D Sub RS 232 USB Host USB Device Power 100 120 220 240VAC 10 50 60 Hz 70 Watts Display Graphical LCD 1 4 VGA 5 7 in diagonal Display Update Rate gt 20 Hz Operating Environment 5 C to 40 C lt 70 RH non condensing Storage Environment 20 C to 60 C lt 90 RH non condensing Altitude lt 3000m Installation Category H Pollution Degree 2 Use Location Indoor use only 2 6 2 Electrical Specifications DC Current Measurement Low Power Semiconductor Photodiode Full Scale Current 250nA 2 50pA 25 0uA 250A 2 50 mA Resolution 10 fA 100 fA 10 pA 100 pA 1 nA 100 nA Bandwidth Unfiltered 480 Hz 43 kHz 170 kHz 140 kHz Accuracy Maximum 5 5 X Signal to Noise Ratio 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 24 General Information Peak Peak Current Measurement Low Power Semiconductor Photodiode Signal Range ERENESESESESERED Full Scale Current 250nA 2 50pA 25 0uA 250uA 2 50mA 12 5 mA 76fA 763fA 7 63 ae 76 3
69. e inclusion of LabVIEW drivers tools to develop in the NET environment and a high speed software utility that fully utilized the optical meter s ability to sample at 250 kHz and transfer data via USB interface at 8 Mbps Optical Meter Functionality Optical meters in the 1931 2931 Series product line are designed to provide continuous wave CW and pulsed source measurements that support the testing and production needs of free space beams and fiber optics based sources These optical meters come in one or two channel configurations and with cooled detector controllers They require detectors having a 15 pin D Sub type Male connector Model 1931 C The model 1931 C optical meter is a 1 channel input optical meter compatible with all Newport detectors having a 15 pin D sub type connector All product features and capabilities described herein are included in this model except a second detector channel or built in detector cooler controller Model 2931 C The model 2931 C optical meter is a 2 channel input optical meter compatible with all Newport detectors having a 15 pin D sub type connectors All product features and capabilities described herein are included in this model except a built in detector cooler controller Calibration Calibration of the power meter is done at the factory by defining a slope and offset for all ranges as determined for each detector type Newport recommends annual factory re calibration to ensure th
70. ector responsivity and or additional unit conversions such as W to W cm NOTE Per area unit conversions such as W to W cm divide the measurement value by the active area of the detector This calculation assumes that the entire active area of the detector is uniformly illuminated Per area measurements where the entire detector active area is not uniformly lit are not accurate The user must insure that these conditions are met before utilizing per area units or make measurement corrections accordingly Typical Detector Signals The flexibility of the Model 1931 2931 Series analog signal flow is required in order that 1t may properly measure the signals that various types of detectors make Basic optical power or energy measurements are related to a measured detector signal S in the following way S Pan R Where R Detector responsivity at S Detector signal Semiconductor 918D 818 Series Low Power detectors provide a current signal The 1931 2931 Series is capable of 10fA resolution in order to provide the highest sensitivity performance with these detectors Peak to Peak Photodiode Detector Signals The 1931 2931 Series allows one to make peak to peak measurements of time varying signals from semiconductor photodiode detectors Since optical power is a zero bounded positive quantity signals from a detector observing such modulated light will similarly be zero bounded positive signals To make a peak to peak meas
71. efault 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM DETMODEL Description Syntax Remarks For example Response model PM DETSIZE Description Syntax Remarks Response Detector model query PM DETMODEL The PM DETMODEL query returns the model number of the detector 818 SL Type Description string Detector model number Detector surface area PM DETSIZE The PM DETSIZE query returns the surface area of the detector in cm Type Description 8 3 3 31 8 3 3 32 8 3 3 33 8 3 3 34 Communication Command Reference 83 Area float Detector surface area PM DETSN Description Detector serial number query Syntax PM DETSN Remarks The PM DETSN query returns the serial number of the detector For example 0001 Response Type Description serialnumber string Detector serial number PM DIGITALFILTER Description Digital filter setting command Syntax PM DIGITALFILTER value Remarks The PM DIGITALFILTER command specifies the digital filter window setting Argument Value Filter Setting Setting Oto 10000 Size of digital filter window Related Commands PM DIGITALFILTER PM DIGITALFILTER Description Digital filter setting query Syntax PM DIGITALFILTER Remarks The PM DIGITALFILTER query returns an integer indicating the present digital filter setting Related Commands PM DIGITALFILTER PM DPo
72. elated Commands PM MODE 92 8 3 3 60 8 3 3 61 8 3 3 62 Communication Command Reference PM Power Description Syntax Remarks Response Type Power query PM P The PM P query returns the power in the selected units Description power exp Exponential form 1 e 9 4689E 04 Related Commands PM UNITS PM PWS PM PWS Description Syntax Remarks Response Power reading 1 Status l Power reading 2 Status 2 Read with status query PM PWS The PM PWS query returns the status and values of the reading The status should be used to validate the reading The reading will be in units corresponding to the units field in the status word Type Description exp Power in present units for channel 1 int A bitfield in hexadecimal defining the current channel status exp Power in present units channel 2 if present 0 0 otherwise int A bitfield in hexadecimal defining the current channel status NOTE The bitfield is defined as follows Bits 9 7 Bits 6 4 Bit 3 Bit 2 Bit 1 Bit 0 Channel Units See PM UNITS Channel Range See PM RANge Detector Present Channel range change status Indicates if a measurement has been taken while the unit is ranging Detector Saturated reserved follows bit 0 Channel overrange Indicates that the current measurement is overrange for the current channel range Related Commands PM MODE PM RANge Description Syntax Remarks Range select PM RAN
73. elected by pressing Left Right arrow keys The desired value can be accepted by pressing Setup Enter key Number of Digits Setting The 1931 2931 Series displays a default 4 number of digits To change these settings bring the cursor on top of the Num Digits field Hit the Enter key A drop down menu appears with the option of 3 4 or 5 digits Select the desired number of digits and hit Enter Offset Field On the right column of the Measurement Settings the unit displays the Offset stored when the user hit the Zero dedicated key This value can be cleared or updated if the unit is in the default screen and Zero is pressed see Section 4 1 6 for more information Detector Information The Measurement Settings screen displays information about the detector used based on the data available in the detector calibration module or detector internal memory The available data are the detector model number Detector the detector serial number S N the detector temperature Det temp if the detector has an internal temperature sensor and the detector responsivity Responsivity Trigger Setup The Trigger Setup screen can be Measurement Settings accessed from the Measurement Wavelength 670 Detector 816 001 E e TTTS 1199 Sir ic uc ok Settings Figure 40 Pressing the Ranga ilhak A ih ru Runge type Ato ed temp Mo Therm Trigger soft key Lives the user a few All enude j Hespintcmty EF 1 choices to setup the trigger accord
74. ent light Check that any ambient light was ZEROed before the measurement was made Wavelength calibration Check that the calibration factor for the measurement wavelength is properly set Detector saturation or damage Check that the optical power density remains below the detector s saturation or damage Table 7 Common Measurement Errors 10 Maintenance and Service CAUTION There are no user serviceable parts inside the 1931 2931 Series Optical Power Meters Work performed by persons not authorized by Newport Corporation will void the warranty Calibration accuracy is warranted for a period of 1 year After 1 year the unit should be returned to Newport Corporation for recalibration and NIST trace ability re certification 10 1 Enclosure Cleaning WARNING Before cleaning the enclosure of the 1931 2931 Series Optical Power Meters the AC power cord must be disconnected from the wall socket The enclosure should only be cleaned with isopropyl alcohol or a mild soapy water solution applied to a damp lint free cloth 10 2 Fuse Replacement NEWPORT 1 MODEL MED wooo Pry open cover to remove fuses Figure 63 Fuse Replacement 114 10 3 Maintenance and Service WARNING To reduce the risk of electric shock or damage to the instrument turn the power switch off and disconnect the power cord before replacing a fuse If a fuse blows 1 Disconnect the power cord from the instrument
75. eout period when the power meter is in Peak Peak Continuous mode 2 Auto ranging in Pulse Continuous mode The power meter automatically shifts to a lower range once every timeout period when it determines that no pulse measurements could be taken in the existing range Users must set this timeout value to 250ms or larger than their pulse repetition rate in order to be able to perform measurements accurately Argument Type Description Value int Timeout value milliseconds Related Commands PM MEAS TIMEOUT Communication Command Reference 91 8 3 3 57 PM MEAS TIMEOUT Description Measurement timeout query Syntax PM MEAS TIMEOUT Remarks The PM MEAS TIMEOUT query returns the selected measurement timeout value in milliseconds Response Type Description Timeout int measurement timeout in milliseconds Related Commands PM MEAS TIMEOUT 8 3 3 58 PM MODE Description Acquisition mode select Syntax PM MODE mode Remarks The PM MODE command selects the acquisition mode for acquiring subsequent readings Argument Value Description Mode 0 DC Continuous i DC Single 3 Peak to peak Continuous 4 Peak to peak Single J RMS Related Commands PM MODE 8 3 3 59 PM MODE Description Acquisition mode query Syntax M MODE Remarks The PM MODE query returns an integer indicating the present acquisition mode Response Value Description Mode 0 DC Continuous l DC Single 3 Peak to peak Continuous 4 Peak to peak Single Ki RMS R
76. eries Power Meters electronics adapt to a number of signal measurement tasks DC current AC peak to peak current or integrated DC current This versatility is required to handle the various signals that Newport s Low Power semiconductor detector families generate The detector data is introduced to the 1931 2931 Series by way of a calibration module specific to the detector in use At power up and RESET the 1931 2931 downloads information about the detector from the calibration module or the detector internal memory Based on the calibration module preprogrammed data the meter learns the set of operating states available to the detector The user then selects among the available operating states when using the meter Front panel control and the operating states of the Model 1931 2931 Series are discussed in Sections 3 9 2 Analog Signal Flow The detector signals can follow many different paths through the 1931 2931 Series input amplifier chain A block diagram of analog signal flow is shown in Figure 62 The actual flow path depends upon the detector type and the mode of measurement Analog pe Input 2 Programmable Programmable Voltage Bandwidth Amplifier Noise Filter Programmable Voltage Buffer Programmable Transimpedance Amplifier Figure 62 Model 1931 2931 Series Analog Signal Flow Diagram The analog signal flow path 1s primarily determined by the responsivity units of the detector The numerator of these units indic
77. especially when one uses protective eyewear it may be desirable to change the meter display color to accommodate the eyewear color The instrument has predefined color schemes that can be changed any time Figure 42 Al Mode CW Cont Range 110 0 pW f 400 nm 30 87 Hint Press lefiinght arrow key to switch channels x inia Ae iii a Negative black and white Screen d Green screen Figure 42 To change the display colors first press the Enter Setup key This will bring the Setup screen and reconfigure the Soft keys Figure 43 Pressing the System soft key will bring a secondary setup screen Navigate to the Color Selection to change the screen color Figure 44 Also navigate to the Brightness field and hit Enter to change the screen brightness The default value is 100 Press the Measure soft key to go back to the Measurement Settings screen or press ESC to go back to the main screen b Positive biac and r Screen e Blue screen S i te c Red screen 400 nrm 39 8 Hint Press lebngh amra key to Sectch channels SA ac tant oo ata Me dealers z Stahistir Math f Color Blue screen Predefined color schemes Wovedendgth att Dadector AVE 1 12 Ponge Gils amp EN E ts Deel temp No Therm leE Ai Hesponeety 135E Analog Hia Ret wa Daio Sun Duggal fhar 3i Offpoi 0 0000 Sen Units Sunt Mager Dipit r lode Spal size l 11310 Mange type f
78. eter Related Commands PM DS SIZE PM DS SIZE PM DS INTerval 8 3 3 45 8 3 3 46 8 3 3 47 Communication Command Reference 87 PM DS SIZE Description Size of the Data Store query Syntax PM DS SIZE lt size gt Parameters The parameter lt size gt is of type lt integer gt in the range 1 to 250000 The parameter represents the size of the data buffer to be used for data storing Function This command sets the size of the buffer for the currently selected channel used for data storing NOTE The data buffer is cleared automatically when this command is used and all previously stored data will be gone Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS SIZE Description Data Store Buffer Size Query Syntax PM DS SIZE Parameters None Function This query returns the data store buffer size for the currently selected channel Returns lt size gt is of type lt number gt and represents an integer of the range to 250000 Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS UNITs Description Data store units query Syntax PM DS UNITS Remarks The PM DS UNITS query returns an integer indicating the units selected Response Value Description units 0 Amps 2 Watts 3 Watts cm 6 dBm 88 8 3 3 48 8 3 3 49 8 3 3 50 Communication Command Reference Related Commands PM UNITS PM UNITS PM FiLTer Description Syntax Remarks Argument Filter type Filter select c
79. forming Basic Measurements Introduction Many different types of optical measurements are possible using the 1931 2931 Series of Power Meters Most of these possible measurements are selected from within the MODE menu This chapter discusses these measurements Measurement Modes and Units The Model 1931 2931 provides a number of measurement modes for acquiring data At power on the meter checks the detector s calibration EEPROM to determine the available measurement modes supported by the detector Measurements can be displayed in various units The detector type and the measurement mode determine the set of units available at any given time Table 1 illustrates the measurement modes and units available for each detector family The measurement modes are grouped naturally into two categories CW and Peak to Peak Pk Pk Each will be discussed in the sections below The 1931 2931 Series sets the measurement to a detector specific default mode depending on the detector used All Newport detectors have internal logic or calibration modules Based on the data stored in detectors the instrument knows to auto configure itself and sets up the mode range filter rate etc The user in the setup screen can change the detector specific default mode The basic measurement techniques for using the 1931 2931 Series are covered in the following sections Refer to Table 1 for a review of the 1931 2931 s functions and measurement capabilities
80. g the Mod lesa see imaa formula shown below Corrected measurement Actual measurement M1 Offset Figure 50 Measurement Settings M2 Note that these settings are channel Correction Settings specific and apply to the primary Result Detector M1 Offset M2 channel viewed on the main Multiplier 1 1 0000 measurement screen i Offset 0 0000 W The default value for the two Multiplier 2 1 0000 multipliers is 1 0 and the offset is 0 0 If any one of these three parameters are changed from their default values the main measurement screen shows the Figure 51 Correction Settings corrected measurement A new field called Detector appears at the bottom of the main screen that displays 52 4 10 4 10 1 4 10 2 System Operation Display Modes The selection of various display modes can be done from the default screen by pressing the Mode soft key When the Mode selection screen is displayed Figure 52 the display mode can be selected from the second column Numeric Display The numeric display is the default display of the 1931 2931 Series The numeric display shows the current measured value of the primary channel Analog Bar The Analog Bar display mode brings a bar graph below the numeric display The bar graph is white and follows the value showed by the numeric display The minimum and maximum labels displayed just below the bar graph represent the input ran
81. ge the unit is currently set on For example if the unit is set on 109 99 UW range then the bar graph shows the same range of 0 to 109 99 UW In the middle of the bar graph the displayed number is the middle of the range _ Measurement Mode Display Mode F ICW Continuous umeric _ CW Single Min Max bar CW Integrate Analog needle Pk Pk Continuous Vertical chart Pk Pk Single RMS Mode CW Cont Pan ge Auto 400 nm 40 46 Mode CW Cont A 400 nm 20 2w Min 15 98 pW Max 40 59 pW z Li Pa l a CN e Pear oF 109 99 u vw Ke hannels Figure 54 Analog Bar System Operation 53 The major ticks represent 10 of the range and the minor ticks represent 5 of the range If the Soft key labeled Show Max is selected the maximum value is retained and displayed in the bar graph with red color The red bar is updated with each measurement if the current measured value is larger than the largest of the previous measurements Besides the maximum value being displayed with a red bar the actual value is displayed above the bar graph where Max shows the value If the Soft key labeled Show Min is selected the minimum value is retained and displayed in the bar graph with green color The green bar is updated with each measurement if the current measured value is smaller than the smallest of the previous measurements Besides the minimum value being displayed with a green bar the actual value is displayed abo
82. h an external command PM TRIG EDGE Section 8 3 3 e Soft Key The system can be triggered with a Soft Key that appears in the main screen e Command The system is triggered with an external command PM TRIG STATE Section 8 3 3 The Trigger Start can also be set with an external command PM TRIG START Section 8 3 3 Trigger Stop The Trigger Stop is an event that tells the system when to stop taking measurements In the case of a single measurement a trigger stop event arms the system for the next measurement It can be set in different ways Never Stop The system measures continuously e External Trigger TTL Signal The measurement stops when an external TTL signal is connected to the Trigger In BNC The edge choice is set with an external command PM TRIG EDGE Section 8 3 3 e Soft Key The system stops measuring when a Soft Key is pressed This key appears on the main screen e Command The system stops measuring when an external command PM TRIG STOP Section 8 3 3 is sent via USB or RS232 e Value The system stops measuring when the measured signal crosses a user programmed value 46 System Operation e Time The system stops measuring when a user programmed time passed between the Start event and the current measurement e Number of Samples The system stops measuring when a user programmed number of measurements passed between the Start event and the current measurement The Trigger Stop can a
83. ical Suppor C OMLACIS reproier a E TA ceasaitenss vii Tab Or ODEM eiie 1X LASUOF PI CURES ois ccs canes eed dae cen te eon ee ee anes xil E E 0 ek RENAE I A N EEP A EAE E see E T ee AEA er XIV 1 Safety Precautions 15 LL Definitions and Symbols cicussiusrasaiuivccetanrinidetiaaeenaeiuieiet 15 1 1 1 General Warning or Caution cccccccccccceeeeeeeeeeeeeeees 15 2 TIS CUIC SOC Kerra oa E aud dtaniaatnaiedeania 15 1 1 3 Protective Conductor Terminal ccccccccecseeeeeees 15 1 1 4 European Union CE Mark cccccccccsssseseeeeeeeeeeeees 16 1 1 5 Alternating voltage symbol ccccccccccceeeeeeeeeeeeeeees 16 BEG SOs ce toncactt at cere sen teas E selene aeeate 16 Dey SOM ee teat aetna cath ane chai a house setae eueniet etait 17 FeS USCS onie N Gama tate moe tenet Cae 17 EES Frane or CHASSIS arenei a A 17 I51 10 USB Connector Symbol iie5 20 c 2008 4ceees Ei 17 1 1 11 Waste Electrical and Electronic Equipment WEEE 18 1 2 Warnings and Cautions ccccccccccccccccceeeeeeeeesssssssseeeeeeeeeeeeeeees 18 eG ccitlereed Matec celiac meenmperre mere rrrer rte rr Treen mn rr Tree 18 L22 General AUTOM seein ane E a 19 1 3 Location of Warnings dcccssiainietcaaadid rida iis tyeldeesawianeenceasdieidadia vies 20 ksl Rear Pinoh a ae 20 2 General Information 21 Zak WO GUCH OM sicoar tices 3 cages tata saute N 21 2 2 Optical Meter Functionality sssceseeeeeeeeeecececeee
84. igital Filter is a moving average filter that can be set at 10 100 1000 or 10000 measurements These values can be changed by the user If the digital filter is set on 10 the average value is computed on 10 measurements in a First In First Out FIFO fashion The Digital Filter helps the SNR the same way as the Analog Filter does With both filters on low level continuous signals can be measured with a high degree of accuracy The Analog Filter is always applied to the entire amplifier chain of the meter Therefore the user will see the detector signal filtered at the Analog Output BNC The Digital Filter 1s a digital signal processing filter and 1s only applied to the calculated measured values that are displayed on the meter screen While the displayed values may have both filters applied An Dg the Analog Output can only have the Analog Filter applied to the signal Because of that the user may see a difference in the way the signal is filtered between the displayed values and the Analog Output values 112 9 8 Principles of Operation When the system performes frequency measurements the analog filter 1s ignored Common Measurement Errors The most common sources of optical measurement error are listed in Table 7 below Other common errors are discussed in the preceding subsections of Measurement Considerations Type of Error What should be done Radiometry Check that all of the light is actually hitting the detector Ambi
85. ing Gne 65Hz Rel val CODIO Sun Daggal fhar Og Offset 0 0000 Sun to the measurement needs inte 5 The user has the option to send a totter trigger pulse at the Trigger Out BNC connector based on the Trigger In signal Trigger Out can be delayed Figure 40 Accessing the Trigger Setup relative to the trigger input with screen Trigger Delay 4 3 1 4 3 2 4 3 3 System Operation 45 The 1931 2931 Series has an advanced Trigger set that allows the user to synchronize measurements with external events Synchronization can be achieved with Trigger Start and Trigger Stop which can be set both from the trigger setup screen or with external commands Trigger Delay The Trigger Delay refers to the time amin delay between an event at the trigger input e g rising edge and a TRIGGER DELAY corresponding event at the Trigger Output The user has the possibility to Figure 41 Trigger Delay waveforms change the delay between 150 ns and 210 seconds Besides the setup screen the user has the option to change the delay with an external command PM TRIG HOLDoff Section 8 3 3 Trigger Start The Trigger Start is an event that tells the system when to take a measurement or a group of measurements It can be set in different ways e Continuous The system is always triggered e External Trigger TTL Signal The system is triggered when an external TTL signal is connected to the Trigger In BNC The edge choice 1s set wit
86. inks contained in third party sites or any changes or updates to third party sites MS or Microsoft Corporation is not responsible for webcasting or any other form of transmission received from any third party sites MS or Microsoft Corporation are providing these links to third party sites to you only as a convenience and the inclusion of any link does not imply an endorsement by MS or Microsoft Corporation of the third party site 132 Notice Regarding Security To help protect against breaches of security and malicious software periodically back up your data and system information use security features such as firewalls and install and use security updates No Rental Commercial Hosting You may not rent lease lend or provide commercial hosting services with the SOFTWARE to others Separation of Components The SOFTWARE is licensed as a single product Its component parts may not be separated for use on more than one computer Additional Software Services This EULA applies to updates supplements add on components product support services or Internet based services components Supplemental Components of the SOFTWARE that you may obtain from Newport MS Microsoft Corporation or their subsidiaries after the date you obtain your initial copy of the SOFTWARE unless you accept updated terms or another agreement governs If other terms are not provided along with such Supplemental Components and the Supplemental Components are provide
87. instrument is zeroed the offset value is displayed on the main screen above the numeric value see Figure 38 Figure 38 Zero Selection The Zero key toggles the offset on or off The ESC key has no effect on the Zero function Measurement Settings The Measurement Settings screen has Measurement Settings dual functionality Wavelength 570 Cetector 8P001 12 Ponce E T ai e One is the convenience the user has ICETA to change all the measurement Aabenuator 0 Ppa 19 PIZI ha wal DOO Spor settings within one screen iai al fias on oe NOON Ery Sun Mam Digi CW Cont_ Seat size EET e The other is information presented to the user about the detector used mz From the default screen when pressing the Setup Enter key the 1931 2931 Preso MASU Sings Series displays the Measurement TOEN Settings screen as in Figure 39 Changing the Measurement Settings Within the Measurement Settings screen the user can select the Wavelength Range Range Type Beam Attenuator Analog Filter selection Digital Filter selection Measurement Units Measurement Mode Spot Size and the Number of Digits displayed Wavelength Selection With the Navigation Selection keys bring the cursor on top of the wavelength field Hit the Enter key A drop down menu appears with the custom wavelength values see Section 4 4 for more information about the wavelength custom values Select the desired wavelength and hit Enter R
88. ion on the 1931 2931 Series Optical Power Meters This symbol represents a Power On condition 1 1 10 Safety Precautions 17 Q Figure 7 Off Symbol Off The Off Symbol in the figure above represents a power switch position on the 1931 2931 Series Optical Power Meters This symbol represents a Power Off condition Fuses tt Figure amp Fuse Symbol The fuse symbol in the figure above identifies the fuse location on the Models 1931 2931 Series Optical Power Meters Frame or Chassis Figure 9 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the 1931 2931 Series Optical Power Meters This symbol identifies the frame or chassis terminal USB Connector Symbol gt Figure 10 USB connector Symbol The USB connector symbol in the above figure identifies the location of the USB communications connector 18 1 1 11 1 2 1 2 1 Safety Precautions Waste Electrical and Electronic Equipment WEEE Figure 11 WEEE Directive Symbol This symbol on the product or on its packaging indicates that this product must not be disposed of with regular waste Instead it is the user responsibility to dispose of waste equipment according to the local laws The separate collection and recycling of the waste equipment at the time of disposal will help to conserve natural resources and ensure that it 1s recycled in a manner that protects human health and the environment For information about where the use
89. irect the cursor left or right with the Navigation Keys to read the measured values on the graph The current value is displayed in the upper right corner and marked on the screen with a red dot System Operation 4 8 Math Functions The Math function is displayed on A Analog Bebe the math field at the upper right re ry oo 40725 0795 ww side just below the secondary Range 110 0 eN i 4U 20 uw channel field Figure 48 To N 400 nm display the Math field the user selects the soft key labeled Math in 4 0 0 2 the main screen This in turn EW displays the math configuration Aa Hint Press left right arrow key to switch channels Statistics Math _ The Math function can be used to add subtract multiply or divide channels A and B in real time Figure 48 Math field Once in the Math configuration screen the user can use the Navigation keys to build the mathematical expression From the first column the user can select the first variable in the expression from the second column the operator and from the third column the second variable When the selection was made the system returns to the main Figure 49 Math configuration screen screen after the Enter key was pressed Hint Press Store Ref to use the latest reading store Ref AjStore Ref B Dis The same mathematical operations can be performed between either channel A or B current display and a stored value called Ref A or Ref B Ref A and Ref B
90. is made The user should remember that if he she can see the detector active area as he she moves around then the detector registers this as a changing ambient DC signal 5 4 5 5 Performing Basic Measurements 59 For the 918D series detectors also 818 XX lower power detectors with proper adapters you can decide whether to use the attenuator for your measurement or deactivate or physically remove on 818 low power series the attenuator a For very low power measurements pW to uW range in various ambient light environments you can elect to use the detector with no physical attenuator in the optical path This will increase the sensitivity and hence accuracy of the measurement b Incase of higher power measurement the attenuator should be used to avoid damage or saturation of the detector The attenuator use is recommended in mW to low Wattage range incident power Please refer to the specifications of the particular detector to make sure you do not exceed the saturation levels of the detector For the 918D series detectors with integrated non removable attenuators there is a switch built into the detector head sensing the position of the attenuator The power meter will then automatically use proper calibration data for presence or absence of the attenuator in front of the photo diode For models such as 818 low power series detectors which have a removable attenuator there is no switch built into the detector head hen
91. lative or dB readings Returns the user reference value Sets the user reference value for use in relative or dB readings as the present reading Sets the zeroing value with the present reading Sets the zeroing value Gets the zeroing value Table 12 Legacy Commands Reference Legacy Commands MODE n MODE n R_n RWS n RANGE n RANGE n RESP n RUN n STOP n RUN n STOP n STMAX n STMEAN n STMIN n STMXMN n STSDEV_n EXT EXT EXTEDGE EXTEDGE EXTHOLDOFF EXTHOLDOFF UNITS n UNITS n USRREF n USRREF n STOREF n STOZERO n ZEROVAL n ZEROVAL n 14 14 1 14 2 14 3 14 4 14 5 Appendix D Sample Programs Programming Samples The CD will install some simple programming samples to get computer interfacing started These are minimal samples and provided only for reference LabVIEW LabVIEW programming samples separated in folders based on version of LabVIEW compiled with SampleQuery vi demonstrates the use of the drivers Microsoft Visual Basic A zip file in the application folder contains a simple Visual Basic project for communicating with the meter Microsoft Visual C A zip file in the application folder contains a simple Visual C project for communicating with the meter Microsoft NET A zip file in the application folder contains a simple NET project for communicating with the meter 128 Appendix D This page is intentionally left blank 19
92. lso be set with an external command PM TRIG STOP Section 8 3 3 Wavelength Setting Newport detectors have a calibration module or internal memory which stores the Responsivity versus Wavelength Table If the Lambda key is pressed a wavelength screen is displayed with the most common values in nanometers nm see Figure 37 on page 41 The screen has two columns The left column displays the common wavelength values used in the industry while the right column has custom values When the user selects one of the predefined wavelengths in the left column the 1931 2931 Series looks up the wavelength in the responsivity table in the detector calibration module If that exact value is found the system will use the corresponding responsivity for that particular wavelength If the value is not found the system will calculate the responsivity using interpolation The right column in the Wavelength screen gives the user the option to set custom wavelengths To do so with the Navigation keys bring the cursor on top of one of the numbers The rightmost Soft key becomes Edit Value Hit this key to edit the custom number A white cursor appears on the first digit Press the Up Down navigation keys to change the number and the Left Right keys to move to the next digit When finished hit Enter The new custom wavelength will be stored Press Esc to return to the main screen System Operation Display Color 47 In a laboratory environment and
93. mation This section contains information regarding factory service for the source The user should not attempt any maintenance or service of the system or optional equipment beyond the procedures outlined in this manual Any problem that cannot be resolved should be referred to Newport Corporation Copyright and Trademark Information WINDOWS is a registered Trademark of Microsoft Corporation LabVIEW is a registered Trademark of National Instruments INC Visual Basic is a registered Trademark of Microsoft Corporation Visual C is a registered Trademark of Microsoft Corporation vii Preface Technical Support Contacts North America amp Asia Europe Newport Corporation Service Dept Newport MICRO CONTROLE S A 1791 Deere Ave Irvine CA 92606 Zone Industrielle Telephone 949 253 1694 45340 Beaune la Rolande FRANCE Telephone 800 222 6440 x31694 Telephone 33 02 38 40 51 56 Asia Newport Opto Electronics Technologies 253 Aidu Road Bld 3 Fir 3 Sec C Shanghai 200131 China Telephone 86 21 5046 2300 Fax 86 21 5046 2323 Newport Corporation Calling Procedure If there are any defects in material or workmanship or a failure to meet specifications promptly notify Newport s Returns Department by calling 1 800 222 6440 or by visiting our website at www newport com returns within the warranty period to obtain a Return Material Authorization Number RMA Return the product to Newport Corporation freight prepaid
94. ment 1900 NOM eriaren e EEEE aeons 40 Filter SCICCUOIM SCLC hearann a tetas 40 Filter CONM OUrallOl SCrEEN scosi oar e E TE 4 Dicital Biter CQ eraen a OT ai 41 W AVClEMOUNS SCIC Meeinoos rn A N 4 TO SC Me CUNO IG oa chet gre ses ticcemsataheragas T 42 Measurement Settings SCreen yc ais tcnctentiencsieas ewe A 42 Accessing the Trigger Setup SCLOCI vices ioare a E T 44 Trigger Delay Waveforms essre innri anr n KEE EENE EA 45 Predefined Color se henie Scenina A 47 SOUD SCLECN sja RE 47 System Settings SCTE Nieisen irag einai a eon eia 47 PRO OUG SCLC I serii E tre thaw teiadalac hem aut ane eiatetiiesondiaetiierdaleae nas 48 SAS UCS SOLEC uaaa n EE EEE E E sidemnsadaat eu iaee 48 EE E a E a E EAE A E E A T EE E TAT 49 INPUTS deena a a Acne Paces 50 Mathi connoura ion SCLCCM croite EEE E 50 Meas re ment 56 WINGS saci areeig erent ia untae canes 51 COTE CUION SCLIN Sangeet tots tata E ced edaata tl malian ilnaes ctu 51 Mode selection SCLC Marceneiro EEEE 52 Toe Numeri display aieeaa E E 52 PRTG OOS AT sosina a TA A EAA 52 AWO ZOOM ae E a a E A 53 Ando SNcedicdis play nerra bi a eee 54 Vertical chart with 10 measurements per line ccccceeeeeeeee 54 Vertical chart with 1 measurement per line ee eeeeeeeeee 54 Application front panel assiresnresoneisins io n E 63 Application Advanced Options Configuration Tab 0008 64 RS 232 9 Pin to 9Pin Cable Connections Cable terminators RS DD E EENES EAN A IS EEES
95. nce between the 1931 2931 Series Optical Power Meters and adjacent walls for ventilation purposes Approximately 2 inch spacing for all surfaces is adequate Electrical Requirements Before attempting to power up the unit for the first time the following precautions must be followed WARNING To avoid electric shock connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury e Have a qualified electrician verify the wall socket that will be used is properly polarized and properly grounded Set the mains selector tumbler to the voltage that matches the power outlet AC voltage Verify the correct rated fuses are installed according to the fuse marking on the rear panel Power Supplies AC power is supplied through the rear panel input power connector that provides in line transient protection and RF filtering The input power connector contains the fuses and the switch to select series or parallel connection of the transformer primaries for operation at lJOOVAC 120VAC 220VAC or 240VAC The product is shipped with the setting on 110V Please make sure you select the right setting according to your AC voltage level Also please make sure you insert the right fuses The product is shipped with a spare of fuses for the 220VAC 240VAC settings CAUTION Permanent damage will occur to the power meter if the input power connector settings are
96. nd other drift effects e With a 918D detector connected to the meter turn the meter on Set the Mode to RMS Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Cover or otherwise block the light source being measured turn Zero on Immediately upon entering the RMS mode the meter will begin to acquire Performing Basic Measurements 61 and calculate RMS value of the data The display value may reflect the RMS of noise due light fluctuations Uncover or trigger the source The displayed value should now reflect the detector signal RMS value e The formula used to calculate the RMS value is given below Where x 1s the signal measured n is the number of samples acquired over a moving time window 100ms by default and y is the RMS value NOTE This process assumes that ambient signals are not changing between the moments when the user zeros the display and when the measurement is made 62 Performing Basic Measurements This page is left intentionally blank 6 Software Application 6 1 Overview The 1931 2931 Series have a USB connector on the back of the unit that is used to connect to a computer for use with this application RS 232 connection for this application is not supported Provided on the CD that comes with the unit is an installation for this software application 1t communicates with the 1931 2931 Series using the USB port The installation
97. nder of the original warranty period or 90 days whichever first occurs Limitation of Warranty The above warranties do not apply to products which have been repaired or modified without Newport s written approval or products subjected to unusual physical thermal or electrical stress improper installation misuse abuse accident or negligence in use storage transportation or handling This warranty also does not apply to fuses batteries or damage from battery leakage THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS First printing 2008 2008 by Newport Corporation Irvine CA All rights reserved No part of this manual may be reproduced or copied without the prior written approval of Newport Corporation This manual has been provided for information only and product specifications are subject to change without notice Any change will be reflected in future printings Newport Corporation 1791 Deere Avenue Irvine CA 92606 USA Part No 44944 02 Rev B Firmware version 2 0 11 yi Preface Confidentiality amp Proprietary Rights Reservation of Title The Newport programs and all materials furnished or produced in connection with them Related Materials contain
98. nenens 22 2r Model 193 LAC eonen e a 22 DA Model MG aun e tind csendia onsets tinct verte caseeeess 22 Did AMM EAMONN eee E E E E 22 20 OIE C FNC AU ONG aa S AE O 23 206 Physical Specifications seinn 23 20 2 Electrical SpeciticationS wes ivacascswsiess tennctacaioiesnossnsstateawaeess 23 27 Unpack and TA AMG secos Utatede daria deatticeaes 25 28 Inspection tor Damage serrare T 29 2 9 Available Options and Accessories sssseseeennnnsseeeeeeesssssseee 25 DOT Pa So n TE E aan bredtecaseasseeuactod 25 2 11 Choosing and Preparing a Suitable Work Surface 25 2 12 TENCCHICAl TR CQUIPEINC MGs age ciees andaletvncs a a E weenie 26 2S POWT SUD DINGS orea a a a 26 3 System Overview 27 Sel Sarup Procedu eaan A A 27 Preface 32 oy 8 01 Gh eg Vc Os 620 Uae ee ce aR ee ee 32L Front Paine CMC ints meuo eeetiacesenncereneaeawaeess 3 2 2 Understanding the Main Screen cc cceeeeeeeeeeees So Rear Panel Way OU siscnrsxivacstnattaesat ed A 3 3 1 Elements That Vary by Model on back panel Pool Panek MAY OU bena e AT hed eeaasietit 55 5 Changing Voltage Seuin OS 12 200 na a aes 3 4 Rack Mounting the 1931 2931 Series ceceeeeesssseeseseeeeeeeens 4 System Operation Aol ROMP ae MIRC y See e ten nate nde E nese amen aenetes ALE lt POWEPR SWING Midadinsksocadisacsustactonedesaudatiaiecnnsdiawesactenetseens AD SCP Ener Key veritas caer irae teas S Med ESOR Oy raaraa E T E isisueeae
99. ng format B lt binary gt Where B mandatory binary number header lt binary gt binary digits 0 s or 1 s 120 Appendix A Example All numbers below represent the decimal value 129 B 10000001 b010000001 b 10000001 3 lt number gt defined as octal The 1931 2931 Series recognizes unsigned octal numbers in the range 0 to 65535 decimal or 0 to 177777 octal Octal numbers are represented using digits from 0 to 7 An octal number has the following format O lt octal gt Where Q mandatory octal number header lt octal gt octal digits 0 to 7 Example All numbers below represent the decimal value 129 Q201 q0201 q201 4 lt number gt defined as hexadecimal The 1931 2931 Series recognizes unsigned hexadecimal numbers in the range 0 to 65535 decimal or 0 to FFFF hexadecimal Hexadecimal numbers are represented using the digits 0 9 and the characters A F A hexadecimal number has the following format H lt hexadecimal gt Where H mandatory octal number header lt hexadecimal gt hexadecimal digits 0 9 and A F Example All numbers below represent the decimal value 127 H7f HOO7F h7f 12 12 1 12 2 Table 10 Appendix B Error Messages Introduction When using the RS 232 port the RS 232 Echo Mode controls when errors are returned When the Echo Mode is enabled the errors are returned immediately When the Echo Mode is disabled the errors are not returned immediatel
100. nput impedance and the user reads 0 25V the detector power 1s 125 mW The selectable analog output levels are given in Table 6 OutputRange 0 1 2 3 Full Scale Voltage Load 50 Q osv aw 25v o Table 6 Analog Output Range Table 9 7 9 7 1 9 7 2 Principles of Operation 109 Measurement Considerations This section describes detector characteristics optical and electrical considerations and environmental influences on optical measurements In general measurement accuracy is limited by the accuracy of the detector calibration Accurate measurements however are also dependent upon proper set up control of temperature and illumination conditions and understanding the factors that affect optical measurements Detector Calibration and Accuracy Newport Corporation calibrates its detectors using secondary standards directly traceable to the United States National Institute of Science and Technology NIST or to Great Britain s National Physical Laboratory NPL The details and accuracy of the calibration procedure vary with each detector model but a detailed description of the calibration results 1s supplied with each individually calibrated detector In general detector calibration accuracy varies from 2 to 5 in absolute terms and varies with wavelength Each detector will also have some variation in response over its surface Therefore for the most reproducible measurements light should illuminate
101. nt and dark current noise The observed dark currents can also be zeroed at any moment via the ZERO function Since dark currents drift with temperature the ZERO should be adjusted just prior to taking any measurements If the detector temperature 1s constant sensitivity changes and dark current drifts are significantly reduced The 1931 2931 Series of optical power meters can measure the detector temperature and correct the power readings accordingly The power correction happens automatically only for those detectors which are equipped with a thermistor Newport offers detectors with thermistors for temperature compensation See Newport web site www newport com for more details The thermistor signal is read via the detector DB 15 connector and the displayed power is adjusted continuously depending on the detector temperature The analog output signal shows the detector signal and is not corrected for temperature Ambient and Stray Light Ambient and stray light striking the detector should be considered when making a measurement Ambient light can be distinguished from dark current or the detector meter noise floor by either turning off or blocking the source and covering the detector face with opaque material such as a piece of black rubber Using the human hand to cover the detector is not advised because it emits a significant amount of infrared radiation and radiates a temperature significantly different from ambient With the dete
102. og output range to the desired level Returns the analog output range Selects if the attenuator s calibration data is included for power calculation Returns setting if attenuator data should or should not be used when calibrating the power meter Gets the attenuator serial number Sets the power meter ranging to manual or automatic Returns 1 if automatic power meter ranging is selected Returns the calibration date of the detector Returns the temperature at which the calibration was performed Selects the power meter channel to display and control Returns the power meter channel currently selected Returns the model number of the detector Returns the serial number of the detector Sets the digital filter window size Returns the digital filter window size Set data store behavior select Return data store behavior select Clear data store Return data store count of items stored Set data store enable Return data store enable Return data store data 1 1 10 5 5 value range oldest 5 newest 5 Set data store interval Return data store interval Saves the data store buffer to USB flash disk Set data store max size Return data store max size Return data store units Selects the filtering operation no filtering analog filter digital filter or analog and digital Returns the filtering operation no filtering analog filter digital filter or analog and digital Sets the wavelength for use when calcula
103. ommand PM FILT filter type The PM FILT command select the filtering operation to be performed on power readings Value Description 0 No filtering l Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM FILTer Description Syntax Remarks Response Filter type Filter type query PM FILT The PM FILT query returns an integer indicating the present filter mode Value Description 0 No filtering l Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM Lambda Description Syntax Remarks Argument Value Wavelength set command PM Lambda value The PM Lambda command selects the wavelength to use when calculating power The value must fall within the calibrated wavelength of the detector Type Description int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda Communication Command Reference 89 8 3 3 51 PM Lambda Description Syntax Remarks Response Wavelength Wavelength query PM Lambda The PM Lambda query returns the selected wavelength in nanometers This is the wavelength used to look up the responsivity from the calibration data Type Description int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda 8 3 3 52 PM MAX Lambda Description Syntax Remarks Response Wavelength Maximum wavelength query
104. on the equipment Only qualified service personnel should replace fuses e To avoid explosion do not operate this equipment in an explosive atmosphere Qualified service personnel should perform safety checks after any service 1 2 2 General Cautions Observe these cautions when operating or servicing this equipment e Before applying power carefully read the warning label placed over the AC power input receptacle in back of the instrument WARNING Before powering on device verify voltage setting is correct and proper fuses are installed as indicted on rear panel Failure to do so may resultina safety hazard or equipment damage CY Newport PN 41189 01 Figure 12 AC Receptacle Warning Label If this equipment is used in a manner not specified in this manual the protection provided by this equipment may be impaired e To prevent damage to equipment when replacing fuses locate and correct the problem that caused the fuse to blow before re applying power e Do not block ventilation openings e Do not position this product in such a manner that would make it difficult to disconnect the power cord Use only the specified replacement parts Follow precautions for static sensitive devices when handling this equipment This product should only be powered as described in the manual 20 Safety Precautions There are no user serviceable parts inside the 1931 2931 Series Optical Power Meters
105. power source Disconnect the power cord from the AC power input connector on the back of the 1931 2931 Series Using a small screwdriver insert and press down into the notch at the top of the power entry module to pry the door open Carefully remove the voltage selector drum Rotate the voltage selector until the appropriate voltage will be viewed through the voltage window CAUTION Do not rotate the voltage selector drum while the drum is inserted in its location By doing so you may bend the contacts behind the drum making the unit inoperable 6 Reinsert the voltage selector drum 7 Ifnecessary change the fuses according to the procedure found in Section 10 2 Replacing Fuses CAUTION Match the voltage setting to fuse sizing Failure to do so may result in damage to the power meter Do not exceed 250VAC on the line input 32 system Overview 8 Close the power entry module 9 Verify the correct voltage is displayed through the voltage window 10 Connect the AC power input cord to the AC power input connector on the back of the 1931 2931 Series 3 4 Rack Mounting the 1931 2931 Series Newport Corporation offers two rack mounting kits for the 1931 2931 Series PM1 RACK Figure 17 and PM2 RACK Figure 18 The PM1 RACK can house one unit from the 1931 2931 Series In the PM2 RACK two units either Model 1931 C or Model 2931 C or one of each may be mounted side by side PM1 RACK and PM2 RACK kits
106. query PM ANALOG OUT The PM ANALOG OUT query returns an integer indicating the present analog output range Value Max Output 0 1 V l 2V 2 5V 3 10 V Related Commands PM ANALOG OUT 8 3 3 18 8 3 3 19 8 3 3 20 Communication Command Reference 79 PM ATT Description Syntax Remarks Argument Enable Attenuator enable command PM ATT enable Indicates whether or not the attenuator for the 818 Series power detector is on the detector Type Description int Enable use of detector responsivity with attenuator available in the calibration module for 818 detectors Related Commands PM ATT PM ATT Description Syntax Remarks Response attenuator Attenuator enable query PM ATT The PM ATT query returns 1 when using attenuator calibration 0 when calculating power without attenuator data Value Description 0 Calibrating power without attenuator i Calibrating power using attenuator Related Commands PM ATT PM ATTSN Description Syntax Remarks Response serial number Attenuator serial number query PM ATTSN The PM ATTSN query returns the serial number of the attenuator When no detector is found the power meter responds with no detector Type Description string Serial number of the attenuator Related Commands PM DETMODEL PM DETSN Communication Command Reference 8 3 3 21 PM AUTO Description Auto range enable command Syntax PM AUTO mode Remarks The
107. r can drop off the waste equipment for recycling please contact your local Newport Corporation representative See Section 15 for instructions on how to disassemble the equipment for recycling purposes Warnings and Cautions The following are definitions of the Warnings Cautions and Notes that are used throughout this manual to call your attention to important information regarding your safety the safety and preservation of your equipment or an important tip WARNING Situation has the potential to cause bodily harm or death CAUTION Situation has the potential to cause damage to property or equipment NOTE Additional information the user or operator should consider General Warnings Observe these general warnings when operating or servicing this equipment e Heed all warnings on the unit and in the operating instructions e Do not use this equipment in or near water Safety Precautions 19 e This equipment is grounded through the grounding conductor of the power cord Route power cords and other cables so they are not likely to be damaged Disconnect power before cleaning the equipment Do not use liquid or aerosol cleaners use only a damp lint free cloth Lockout all electrical power sources before servicing the equipment To avoid fire hazard use only the specified fuse s with the correct type number voltage and current ratings as referenced in the appropriate locations in the service instructions or
108. ration Newport from an affiliate of Microsoft Corporation MS Those installed software products of MS origin as well as associated media printed materials and online or electronic documentation SOFTWARE are protected by international intellectual property laws and treaties Manufacturer MS and its suppliers including Microsoft Corporation own the title copyright and other intellectual property rights in the SOFTWARE The SOFTWARE is licensed not sold All rights reserved This End User License Agreement EULA is valid and grants the end user rights ONLY if the SOFTWARE is genuine Certificate of Authenticity for the SOFTWARE is included For more information on identifying whether your software is genuine please see http www microsoft com piracy howtotell IF YOU DO NOT AGREE TO THIS EULA DO NOT USE THE DEVICE OR COPY THE SOFTWARE INSTEAD PROMPTLY CONTACT NEWPORT FOR INSTRUCTIONS ON RETURN OF THE UNUSED DEVICES S FOR A REFUND ANY USE OF THE SOFTWARE INCLUDING BUT NOT LIMITED TO USE ON THE DEVICE WILL CONSTITUTE YOUR AGREEMENT TO THIS EULA OR RATIFICATION OF ANY PREVIOUS CONSENT GRANT OF SOFTWARE LICENSE This EULA grants you the following license You may use the SOFTWARE only on the DEVICE e Restricted Functionality You are licensed to use the SOFTWARE to provide only the limited functionality specific tasks or processes for which the DEVICE has been designed and marketed by Newport
109. read Output buffer is 4 096 characters long 305 Parser Buffer Overflow Error generated when the system parser runs out of space for commands A command is received into the input buffer then transferred to the parser buffer 12 4 Appendix B This error is generated if the command in the input buffer is too large to fit into the available space in the parser buffer It is usually generated when commands are sent to the instrument faster than it can process Parser buffer 1s 2 048 characters long Device Errors Device Errors are associated with some system condition that affects the operation of the meter Errors associated with data reading will set the appropriate bit but will not generate an error message to avoid jamming the error queue or the interface 701 Detector Calibration Read or Write Failed An error was encountered during a read write operation to the calibration EPROM in the detector If problem persists contact the factory 703 Power Meter set to defaults due to Firmware update After upgrading the firmware in some cases the changes are significant enough to require resetting the instrument to factory defaults 704 User reference cannot be changed stored while you are in units of Watts or dBm Change to dB or Rel to set the user reference value User reference can only be stored in dB or Rel mode 705 Illegal data store parameter change Queue cleared An action that affects the data store caused the dat
110. red to be a command a string or numerical argument The punctuation lt gt 1s used to symbolize the typographic limits of the command string or argument in question lt CR gt Carriage Return The ASCII encoded byte 13 in decimal OD hex lt LF gt Line Feed The ASCII encoded byte 10 in decimal OA hex Semicolons Semicolons are used to separate commands within a single transmission concatenation 66 7 2 9 7 2 6 7 2 1 7 2 8 7 3 7 4 Computer Interfacing lt number gt Numerical Types Numerical parameters are passed and returned as the actual ASCII characters in the string representation of the number See section 11 2 for more detailed information lt string gt String Types See the section 11 1 for a detailed description of lt string gt Command Termination When the power meter receives a command from the RS 232 port it interprets a lt CR gt in the command string as the command terminator USB does not need a termination character Response Termination RS 232 responses from the power meter are terminated by a lt CR gt lt LF gt sequence Entering Remote Computer Interface Mode When the power meter receives a command through either USB or RS 232 communication interface it will automatically go into remote interface mode In this mode of operation users will not be able to make any operational changes to the power meter through its front panel They will only be able to na
111. return of goods please list any specific problems 116 Maintenance and Service This page is intentionally left blank 11 Appendix A Syntax and Definitions 11 1 Definition of lt string gt For convenience the 1931 2931 Series recognizes double quoted single quoted and unquoted strings with certain restrictions as detailed below Any of these forms may be used where a lt string gt parameter is required l lt string gt using double quotes this is a string 2 lt string gt using single quotes this is a string 3 lt string gt using no quotes thisisastring A description of each type of lt string follows l lt string gt defined using double quotes A double quote indicates that a string follows and the string 1s terminated by another double quote A double quote may be embedded within the string by using two double quotes together Example this string contains a double quote All characters within the two outer double quotes are considered part of the string It is an error if the string does not terminate with a double quote The string cannot contain the lt CR gt ASCII decimal 13 lt LF gt ASCII decimal 10 or End or Identify characters 2 lt string gt defined using single quotes This form is similar to double quoted string A single quote indicates that a string follows and the string is terminated by another single quote A single quote may be embedded within the string by
112. roperty settings including channel settings and data logging options The Help About will show information about the application including firmware version when an instrument 1s connected and communicating l 7 1 7 2 7 2 1 7 2 2 7 2 3 7 2 4 Computer Interfacing General Guidelines The 1931 2931 C Series power meters have two computer interface ports USB and RS 232 These communication interfaces can be used to send commands to the power meter from a host PC The commands supported by the power meter can be divided into the following two categories commands that cause the power meter to take a desired action and commands queries that return a stored value or state of the power meter Query commands are always terminated by a question mark It is recommended that when a query command is sent the response to that command from the power meter be read before issuing any other command Set commands on the other hand are used to configure setup the power meter for a desired mode of operation These commands take at least one parameter The subsequent sections in this chapter detail the RS 232 and USB communication protocols supported by the power meter Computer Interface Terminology Listed below are the key abbreviations and concepts used in the command reference section Section 8 of this manual lt gt Delimiting Punctuation For the purposes of this manual any string enclosed by lt gt 1s conside
113. s 4 1 4 Navigation and Selection KeyS cccecesesssseeeeeeeeeeees BND DOER S a aaa a ead teed AAG Dedicated KEYS seasscnanntccacsvesdannisevenedensesiwasuoyeauitatenadeewederes 4 2 Measurement SeN GS a 2 5i525 acters nays ce nec tdsoeatentarieniesteuaaieesees 4 2 1 Changing the Measurement Settings ccccccceeees 4 2 2 Detector Information cc cccccsssseesseeeseeeseeeeeees BS TIO OCT CUD enan isto tunnel tetas a alae toate aasstiapeiees A Sel VHC CC Delay aenea ae eee aren do Tregor Sa en ne eee en Ne ern Eee ene eee Re AS AMC CCl SOP vee tae ee eee AA NV AN CUCM OUD CLUIVO 95 2c 5 35 ENE aaeeeBeemenweceel AD Display Col ar min eigen abit bate heat amin eats dees 4 6 USB Address and RS232 Parameter ccccesesseeeeeeeeeeeeeees Ad SSALIS ICS sisean a E ATE Kata p ea a E E aes Ae Mat I VAC COINS eirinn a A 4 9 Measurement Correction Settings cccsssssssssseeeeeeeeeeeees AAO Wisplay MOC S eer seo cease ees AAO Numeric Display ericeira nenene e EE NEANS ALO Z Andoe Baren E winehat acuseiniii 4 10 3 Analor Needle azcss cated taesscnileten aad sientiaenaeulete ATOA Norica CN ATU epora a 4 11 Firmware Uperade Procedure cis iczsessccoscativessini n 5 Performing Basic Measurements Del AMEFOGUCHON sonen ae T E 32 Measurement Modes and Units 0 05522 cad sete naga as yet 593 CW Meds romentS rnern eaen na aE aT A RANEE 5 4 Peak to Peak Power Measurements cccccccccccs
114. s not generate a prompt or echo character back over the interface This is the default state of the echo mode alll CABLE TERMINATORS RS 232 9 pin to 9 pin 9 PIN PINNO CODE DESCRIPTION DCD CARRIER DETECT RXD RECEIVE DATA TXD TRANSMIT DATA DTR DATATERM READY GND SIGNAL GROUND DSR DATASET READY RTS REQUEST TO SEND CTS CLEAR TO SEND Rl RING IND 1 2 E 4 5 6 T amp 9 oon Mok wh Figure 61 RS 232 9 Pin to 9Pin Cable Connections Cable terminators RS 232 Setting Echo Mode From the Keypad The echo mode can be turned ON OFF from within the menu structure Setting Echo Mode via Remote Interface To set the echo mode use the ECHO command Use the ECHO to see if the echo mode is enabled or disabled Setting the USB Address The USB Address can be set remotely with the ADDRess command USB Communication The instrument is designed to communicate with standard USB interfaces When the instrument is first connected to a PC the user will be prompted by the computer to install software drivers These drivers are included in the software CD that accompanies the power meter Communication can be done through this interface by using the application contained in the CD or by developing software in the user s preferred programming language The software CD contains drivers and example programs in the following programming languages LabVIEW Visual Basic and Visual C
115. ssed to channels A and B respectively Some commands do not apply to a particular channel such as BEEP The behavior of these commands 1s independent of the channel currently selected Command Description Command Glossary Root level Commands Queries Summary Number of Page Parameters punetion No NONE Identification query 73 l Recall configuration settings 73 l Save configuration settings 74 l Sets the instrument s USB address 73 NONE Returns the instrument s USB address 74 l Turns the beeper on or off or beeps once 15 NONE Returns the status of the beeper 75 l Sets the echo on or off ID NONE Returns the status of echo 76 NONE Returns errors generated since the last query 13 NONE Returns errors and their corresponding error text generated since the last 76 query Table 2 Root level Commands Queries Summary Communication Command Reference Tree Level Commands Queries Summary Name DISP BRIGHT DISP BRIGHT PM ANALOGFILTER PM ANALOGFILTER PM ANALOG IMP PM ANALOG IMP PM ANALOG OUT PM ANALOG OUT PM ATT PM ATT PM ATTSN PM AUTO PM AUTO PM CALDATE PM CALTEMP PM CHANnel PM CHANnel PM CORR PM CORR PM DETMODEL PM DETSIZE PM DETSN PM DIGITALFILTER PM DIGITALFILTER PM DPower PM DS BUFfer PM DS BUFfer PM DS CLear PM DS Count PM DS ENable PM DS ENable PM DS GET PM DS INTerval PM DS INTerval PM DS SAVEBUFER PM DS SIZE PM DS SIZE PM DS UNITs PM FILTer PM FI
116. sssesesseeeeeeeees 5 5 Power Ratio and Power Reference measurements 666 5 6 RMS Measurements ccccccccssssssseececeeeeeeeessseecceeeeeeaesseseeeees 6 Software Application Xi Preface OIL OVCO ene eer eee cen a a ee ee O COMME CHO Mpc ia treacle aster T OS General USA GS sedsnincscadesmsosaslsavaxaddeuadedsnsawsadeusesacivniewaddeudeds 64 Menu SIMIC UIC ec oeiceseeeicieiceiccocortinticeinaieoeiaeeeenieenek 7 Computer Interfacing LE General Gde HNES raer a E ienaeeaeeeiees 7 2 Computer Interface Terminology cccc ccc eeseeesseeeeeeeeeeeees 7 2 1 lt gt Delimiting Punctuation cccecccceeeeees Ved SCR aide REMI rn coin heat tar ett centres Peer SLEA Eme Feedin a EER G24 A SEmMColONS soraa E 7 2 5 lt number gt Numerical Types ccccccceeeeeeeeeeees G26 SSIs SMAS PY PCS wasececcesessm ass rg instal aia 7 2 7 Command Termination ccccccccssssesesseseeeeeeeeeeees 72 55 Response Terminati oNeireonsi en 7 3 Entering Remote Computer Interface Mode 0 TA IRS 25Z2C COMMUN CaliOm ase scsse iin a has 7 4 1 Setting Echo Mode From the Keypad 0 7 4 2 Setting Echo Mode via Remote Interface T43 Setting the USB Address ic csticteeeuteieiiinseenddiae n3 USB Communica Ones sisiane aae T EEN 8 Communication Command Reference 8 1 Model 1931 2931 Series Remote Interface Commands 8 2 Command OVELVICW 0cee
117. sssssseececceeeeeeeseeaaaaaeeseessseeees 8 2 1 Activate a Specific Channel cccceeeeeeeee 8 3 Command DeScripuon saaneeni aa 8 3 1 Command Glossary cccccccccccccceeeeeeeeeesseseeeeees 8 3 2 Display Command S osnesiei a Het eek 8 3 3 Power Meter Commands esssseeennsssssseeeeeessss 9 Principles Of Operation Dak Mrod c ion areen E oats 92 Pavaloe Siena FlOWeciira e n een eeancteneihes 93 Digitized Signal FlOWnersesriccernnrsne AA 94 Typical Detector Signals arren cies 9 5 Peak to Peak Photodiode Detector Signals 00000000 90 Anal O OUD E a a tla EA 9 7 Measurement Considerations ccccccccsssssssssseeeeeeeeeeeeeees 9 7 1 Detector Calibration and Accuracy cccccceeees 9 7 2 Quantum Detector Temperature Effects 9 7 3 Ambient and Stray Light ce eeeccceeeeeceeeeeeees OF D1 Ciial FINEN eener naar N aerate 9 8 Common Measurement Errors cc ceeeceeeccceeeeeeseeeeeeees 10 Maintenance and Service xii Preface IOT Enclosure C eann ee N N 102 Fuse REpICEMIENT oiua O 10 3 ODLaININS SOTVIC E vasa cassacusscecadseniwsacsuadeasusarocedeedistnedestovesaviaes IOA Service ON cac a stacris trae N 11 Appendix A Syntax and Definitions Pied Denimo Stine cin a E N 11 2 Dei nIMOn OL numb aae a a eas 12 Appendix B Error Messages 121 iroddu HO Nes ct aetenidaueteiasutaeaeeosencnanueets 122 Omnia ETON eana aa 12 Fxecuton ETOS
118. td Dev 0 0216 uw The left column shows the statistics current setup The Statistics function has two modes Graph Fixed and Continuous Figure 46 Statistics screen When in Fixed mode the Statistics engine calculates the minimum Min maximum Max Range Mean Standard Deviation Std Dev for a fixed number of samples and displays them in the right column The number of samples is displayed in the left column on the Samples line As Figure 46 shows the number of samples is 10000 with a time interval between samples of 100 us This means that the statistics values are calculated over 1 second interval If the Mode is Fixed at the end of the 10000 samples the statistics values are cleared and the calculation starts again with the next measurement The user can change the Mode with the Navigation keys When the Enter key is pressed a drop down menu allows the user to select Fixed or Continuous Mode By using the Up and Down navigation keys followed by Enter the user can change the Mode to Continuous In Continuous Mode the statistics calculations are done over the same number of samples 10000 but these samples are updated in real time in a 4 7 1 System Operation 49 first in first out FIFO fashion The system starts filling up the list of 10000 and calculates the statistics with the available number of samples at hand When the list is filled the oldest measurement is replaced with the latest measurement The statistics
119. ter defaults to configuration setting 1 Value Description 0 Reserved Ito 5 Valid configuration settings Related Commands RCL ADDRess Description Syntax Remarks Argument Value USB address command ADDRess value The ADDRess command sets the power meter USB address After changing USB address the communication with the power meter has to be re initialized Value Description 0 Reserved l to 31 Valid USB address range Related Commands ADDRess ADDRess Description Syntax Remarks Response address USB address query ADDRess The ADDRess query returns the power meter s USB address Value Description 0 Reserved I to 31 Valid USB address range Related Commands ADDRess Communication Command Reference 15 8 3 3 6 BEEP Description Beep command Syntax BEEP beep set Remarks The BEEP command controls the power meter s beeper The beeper can be used to signal error or warning conditions Response Value Description beep set 0 Disable beeper l Enable beeper 2 Beep for 100 ms Note The beeper is enabled at power on Related Commands BEEP 8 3 3 7 BEEP Description Beep query Syntax BEEP Remarks The BEEP query returns the enable status of the power meter s beeper Response Value Description beep set 0 Beeper disabled l Beeper enabled Related Commands BEEP 8 3 3 8 ECHO Description Echo command Syntax ECHO echo set Remarks The ECHO command is used to turn
120. the SOFTWARE including the U S Export Administration Regulations as well as end user end use and destination restrictions issued by U S and other governments For additional information see http www microsoft com exporting Newport Corporation Worldwide Headquarters 1791 Deere Avenue Irvine CA 92606 In U S 800 222 6440 Tel 949 863 3144 Fax 949 253 1680 Internet sales newport com Newport Visit Newport Online at www newport com
121. the detector as uniformly as possible over as large an area as practical CAUTION Avoid focusing a light source onto the detector surface Inaccurate readings and possible detector damage may result Consult the detector manual for saturation or damage thresholds NIST trace ability requires that detectors be recalibrated on one year intervals As individual detector responses change with time especially in the ultraviolet recalibration 1s necessary to assure confidence in the accuracy of the measurement For the most reproducible measurements the same detector should always be used for measurements that are to be directly compared Quantum Detector Temperature Effects Semiconductor Newport Low Power detectors are affected by temperature At long wavelengths quantum detectors typically lose sensitivity with increasing temperature Additionally detector dark current increases exponentially with temperature Observed dark current is often dominated by the interaction between the detector and a meter s amplifier and 1s typically larger than the theoretical dark current limit Silicon detectors are inherently quieter than germanium detectors due to their higher internal resistance and lower capacitance The noise or drift in the dark current sets a lower bound on the measurement resolution that can be achieved with any given detector 110 9 7 3 Principles of Operation Cooling a detector significantly lowers its dark curre
122. the power in the selected units Returns the power with status Selects the gain stage when making readings with the detector head within a range from 0 to 5 with zero being the highest Returns an integer indicating the current range Specifies the responsivity of detector at desired wavelength Gets the responsivity currently used for making power calculations Disables or enables the acquisition of data Returns the present acquisition mode Return statistics buffer maximum value Return statistics buffer mean value Return statistics buffer minimum value Return statistics buffer maximum minimum value Return statistics buffer standard deviation value Returns the 918 detector s temperature in degrees Celsius Set external trigger enable Return external trigger enable Set external trigger edge select Return external trigger edge select Set external trigger holdoff time Return external trigger holdoff time Set the optional start event Returns optional start event Set the optional stop event Returns optional start event Set the trigger state Returns the trigger state Set the measurement level for trigger stop condition Returns the measurement set level for trigger stop condition Set the time duration for trigger stop condition Returns the time duration for trigger stop condition Selects the units for readings Returns an integer indicating the selected units Sets the user reference value for use in re
123. ti ez Math 38 System Operation 4 1 6 Pressing the Left or Right key of the Navigation and Selection group will make channel B primary and channel A secondary as in Figure 26 Navigation If the instrument is in Setup mode or in any configuration screens pressing the arrow keys will select different setup modes as displayed by the current screen NOTE When a channel is selected as primary the main screen shows the primary channel and all the function keys whether dedicated or soft keys apply to the primary channel Soft Keys Below the screen are a group of four keys Their function varies depending on the measurement mode or the setup screen They are designed to provide context sensitive functionality to the user The label displayed above each key indicates their function Figure 27 Soft keys Dedicated Keys Six dedicated function keys are at the bottom right portion of the front panel Each of these keys can be used for quick access to the given function Figure 28 Dedicated keys System Operation Range Pressing this key reconfigures the Soft keys at the bottom of the screen as in Figure 29 From this screen the user has two options e One is to toggle Auto Manual Range mode This is accomplished by pressing the left most Soft key If the meter current configuration is Manual mode the left most Soft key 1s labeled Auto to allow the user to change the Range selection in Auto Range Mode This c
124. ting power Gets the selected wavelength in nanometers Legacy Commands ATTN n ATTN n ATTNSN n AUTO n AUTO n CALDATE n CALTEMP n DETMODEL n DETSN n DSBUF n DSBUF n DSCLR n DSCNT n DSE n DSE n DS _ n SFREQ SFREQ DSSIZE n DSSIZE n DSUNITS n FILTER n FILTER n LAMBDA n LAMBDA n 126 Appendix C Name PM MAX Lambda PM MAX Power PM MIN Lambda PM MODE PM MODE PM Power PM PWS PM RANge PM RANge PM RESPonsivity PM RESPonsivity PM RUN PM RUN PM STAT MAX PM STAT MEAN PM STAT MIN PM STAT MAXMIN PM STAT SDEViation PM Temp PM TRIG EXTernal PM TRIG EXTernal PM TRIG EDGE PM TRIG EDGE PM TRIG HOLDoff PM TRIG HOLDoff PM TRIG START PM TRIG START PM TRIG STOP PM TRIG STOP PM TRIG STATE PM TRIG STATE PM TRIG VALUE PM TRIG VALUE PM TRIG TIME PM TRIG TIME PM UNITs PM UNITs PM REF VALue PM REF VALue PM REF STOre PM ZEROSTOre PM ZEROVALue PM ZEROVALue Number of Parameters NONE NONE NONE l NONE NONE NONE l NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE l NONE NONE NONE l NONE Function Returns the longest calibrated wavelength in nanometers Returns current range s maximum readable power Returns the shortest calibrated wavelength in nanometers Returns the currently selected acquisition mode Returns
125. to select dB ratio of channel A to channel B While in the Math function screen select channel A by using the up or down arrow keys There will remain a black border around the highlighted selected channel as you leave the column for the next selection Move to the next column by using the right arrow key and select dB option Move to the last column by using the right arrow key and use the up or down keys to select channel B Press the Menu Enter key to accept the selections and exit the Math function screen The result of A B in units of dB will appear in the designated window on the screen Example 2 in order to get differential values of channels A and B J From the main screen of the meter select soft key labeled Math to enter the math function screen If you cannot see the label Math press the ESC key Use the direction keys to highlight channel A in the first column Using the direction keys navigate to the column sign in the center Using the direction key move the final column such that Ch B is highlighted Press the Menu Enter key to retain the settings and exit the screen at the same time The result of A B will be displayed in the designated window of the main display screen RMS Measurements This section describes the procedure for making a basic signal AC RMS Root Mean Square measurement while properly removing the influence of ambient light a
126. trade secrets of Newport and are for use only in the manner expressly permitted Newport claims and reserves all rights and benefits afforded under law in the Programs provided by Newport Corporation Newport shall retain full ownership of Intellectual Property Rights in and to all development process align or assembly technologies developed and other derivative work that may be developed by Newport Customer shall not challenge or cause any third party to challenge the rights of Newport Preservation of Secrecy and Confidentiality and Restrictions to Access Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation Customer shall not at any time disclose Newport s trade secrets to any other person firm organization or employee that does not need consistent with Customer s right of use hereunder to obtain access to the Newport Programs and Related Materials These restrictions shall not apply to information 1 generally known to the public or obtainable from public sources 2 readily apparent from the keyboard operations visual display or output reports of the Programs 3 previously in the possession of Customer or subsequently developed or acquired without reliance on the Newport Programs or 4 approved by Newport for release without restriction Service Infor
127. turned on and whenever the UNITS or the range changes or when the MODE of operation changes NOTE When using the digital filter in CW Single acquisition mode each measurement is the average of the last 10 100 1000 10000 acquisitions independent of how old any of the measurements are Gain Gain processing accounts for the signal gain of the input amplifiers The output is the product of the digitized value and the amplifier gain Zero Offset Zero offset is active whenever the Offset annunciator is lit The zero offset output is equal to the input value less the zero reference value Responsivity Map s This process scales the input value in accordance with current calibration wavelength and the responsivity map downloaded from the detector calibration module The output of this process 1 e the measurement value is the digitized input value divided by the responsivity associated with the current calibration wavelength or the user defined calibration value Different 9 4 9 5 Principles of Operation 107 responsivities are used depending upon if the attenuator is on as shown in the Setup Menu Units Correction Unit s correction adjusts a measurement value to account for the display units selected When the display units are equal to the detector signal units 1 e equal to the numerator of the responsivity units Table 1 the measurement value is not adjusted Otherwise the digitized value is adjusted to account for det
128. urement the 1931 2931 Series must be able to capture both the maximum and minimum values of a detector signal This is accomplished by sampling 108 Principles of Operation Table 5 Time Varying Signal Measurements Many different measurements can be made on different portions of a time varying signal The most common are DC power peak power and peak to peak power 9 6 Analog Output The Model 1931 2931 Series provides an analog output for signal monitoring The analog output is the actual amplified detector signal and is uncorrected for the effects of the detector s responsivity calibration and ZERO The analog output signal is a representation of what the meter sees at its input However the analog output signal may be filtered if the user selects any cutoff frequency from the drop down menu of the analog filter see paragraph 4 1 6 Also the analog output signal 1s amplified and scaled to the selected analog output level see Table 6 The user can select the analog output level also called Output Range from the Setup menu The analog output maximum level corresponds to the maximum full scale input range the meter is set on For example 1f one selects the analog output level at 0 5 V into 50 Q and the meter is set on 250 mW maximum full scale input range the analog output signal will have a transfer function of 250 mW 0 5 V Therefore if the analog output BNC is connected to an oscilloscope or voltmeter with 50 Q i
129. ve the bar graph where Min shows the value The maximum and minimum bars can be reset with the Reset m M soft key For users who would like to fine B 0 697 w adjust a maximum or a minimum the Ee 1931 2931 offer the Auto Zoom j 400 nr function When the Auto Zoom soft 4 3 0 4 key is pressed another bar appears WV above the Analog Bar The bar length Min 8 25 pW Max 40 16 pW is 2 of the Analog Bar It is a display of the region around the end of the 54 00 uw 10 9 va s left righ to switch c ha analog bar Ss lene iaht arrow Rey to switch channels Figure 55 Auto Zoom The Auto Zoom bar displays with white the current measured value as the Analog Bar does However its trip is more sensitive because the maximum trip is 1 of the Analog Bar If the Show Max or Show Min soft keys are pressed the system behaves the same as with the Analog Bar displaying with red the maximum value and with green the minimum value As an example as Figure 55 shows the red bar in the Analog Bar is very small so with the Analog Zoom this bar is extended giving the user the convenience to see better small signal variations Pressing the Reset m M soft key clears the minimum and maximum bars from both the Analog Bar and the Auto zoom graphs 54 4 10 3 4 10 4 System Operation Analog Needle The Analog Needle displays a vertical marker that moves with the displayed numeric value It is useful for users who look for a maximum or
130. vigate through the various menus to read verify the meter s settings In order to put the power meter back in a state where operational changes can be made locally users may send either a LOCAL command through either USB or RS 232 interface or navigate to the System Setup menu and press the LOCAL soft key RS 232C Communication Before communicating with the 1931 2931 C series power meters through the RS 232 port proper cable connections must be made Figure 32 shows the cable connection for communicating with the power meter over RS 232 interface Straight through cable Once cable connections are made the baud rate and echo mode need to be set The baud rate parity data bit and stop bits are fixed at Baud rate 38400 bits sec Parity No parity Data bits 8 data bits Stop bits 1 stop bit RS 232 communication with the 1931 2931 C series power meters can be performed with either echo ON or OFF When the echo mode is enabled the power meter generates a gt prompt for every new line and all characters sent to the power meter are echoed back over the interface As the user is entering commands the line may be edited by using the backspace key sending an 7 4 1 7 4 2 7 4 3 7 9 Computer Interfacing 67 ASCII decimal 08 code This mode is especially useful when a simple terminal application 1s used to communicate with the power meter When echo mode is disabled normal mode the power meter doe
131. wer Description Detector power query Syntax PM DPower Remarks The PM DPower returns the actual power measurement This measurement does not include any correction settings specified using PM CORR command When the correction settings are set to default values the power 84 8 3 3 35 8 3 3 36 8 3 3 37 Communication Command Reference measurement returned by this command is same as the measurement returned by PM P command Response Type Description Power float Power in Watts Related Commands PM Power PM DS BUFfer Description Data Store buffer behavior selection Syntax PM DS BUFfer behavior Remarks The PM DS BUFfer command selects the behavior mode for control of the Data Store buffer Argument Value Description Mode 0 Fixed Size l Ring Buffer The behavior of the ring buffer is to allow continual data collection after the buffer is full where the oldest values will be overwritten when new measurements are taken Related Commands PM DS BUFfer PM DS BUFfer Description Data Store buffer behavior selection query Syntax PM DS BUFfer Remarks The PM DS BUFfer query returns the value of the Data Store buffer behavior Argument Type Description Behavior int See PM DS BUFfer for a definition of the behavior status PM DS CLear Description Clear the Data Store of all data Syntax PM DS CLear Remarks The PM DS CLear command resets the data store to be empty with no values Argument Type
132. witch a Dedicated Keys Reconfigurable Soft Keys Figure 20 Front Panel keys 4 1 1 Power Switch a 2 Figure 21 Power Switch The power switch is a push button on the bottom left corner of the chassis that turns the unit on or off The power switch is distinguished from other 36 System Operation keys on the front panel by its circular shape The power to the unit is OFF when the push button is fully extended and ON when latched This symbol represents the IN position of the power ON OFF push button switch This represents the OUT position of the power ON OFF push button switch Setup Enter Key The Setup Enter key is placed to the right of the display Figure 22 This key has dual functionality From the main screen Figure 23 press this key to display the Measurement Settings screen Figure 24 Also use this key while any secondary menu is displayed to complete entering data or to exit the current secondary screen Setup Enter Figure 22 Navigation Selection and Setup Enter keys an Dig Mode CVV Cont Range Auto 400 nm 4 Hint Press left right arrow key to switch channels Statistics Figure 23 Main screen 4 1 4 System Operation 37 Measurement Settings Detector 916D SL OD3 S N 10095 Det size 1 0000 cm Attenuator Ref val 0 0000 py Analog filter 5 Hz Offset 40 464 TEA Digital filter ofi Det temp 23 2 degC Units Watts Responsivity 2 273E 1 Mod
133. y and the ERR or ERRSTR commands must be used to retrieve the errors Command Errors Command Errors are associated with the conversion of the data received into the commands and their parameters parsing Incorrect syntax incorrect parameters and improper command format will generate these errors Any command error will cause the Command Error bit bit 5 in the Standard Event Status Byte to be set 104 Numeric Type Not Defined Generated during the parsing of a number and an undefined number type is encountered 106 Digit Expected Generated during the parsing of a number and the parser encounters a non number when a number is expected 107 Digit Not Expected Generated during the parsing of a number and the parser encounters a number when a different character 1s expected 115 Identifier Not Valid Generated when a parameter is not valid or not properly formed 116 Syntax Error Occurs when an error in command structure or parameter type is detected Some typical causes are Table Using a number as a command mnemonic Table 9 Using the wrong parameter type Using ASCII characters outside of a string constant that are not defined by the command language syntax 122 Appendix B 12 3 Table 11 Missing or too many parameters The above list in not exhaustive but does give the basic idea of what to look for 126 Too Many Or Few Arguments Generated when command arguments are missing or too many Exe

Model 1931/2931 Series Power Meters Manual Rev.B

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