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Model 1936/2936-C Series - UCSD Department of Physics

1. 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 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 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 Selects the units for readings Returns an integer indicating the selected units Sets the user reference value for use in relative or dB readings Returns the user reference value Sets the
2. 30 30 2 11 Choosing and Preparing a Suitable Work Surface 30 2 12 Electrical RK EQUITEIMEMIS onm Feel boves 30 DAS 31 3 System Overview 33 Sel Startup Procedure 33 Preface 24 WOME AM 33 SL PrOMmt 34 3 2 2 Understanding the Main Screen 34 9 34 3 3 1 Elements That Vary Model on back panel 34 3 9 35 3 3 3 Changing Voltage 37 3 4 Rack Mounting the 1936 2936 Series 38 4 System Operation 41 AE Front Panel KEYS andina e Et D 4 A Nek POWT SWIC 4 4 1 2 Enter Key oui ood co 42 dap ey ode pt 43 4 1 4 Navigation and Selection 43 4 1 4 1 Channel 5 43 E EN 44 ALD Sere 44 21 0 Dedicated 44 45 2 1 0 2 Mode 46 AEOS 46 46 4 10 5 tc ee Es 47 4 1 6 6 Set Zero Offset Zero 48 2 2 INIGASUPCMCNL 48 4 2 1 Changing the Measurement Settings eee 48
3. 98 PM MEAS TIMEOUT 98 PM MEAS DIMEQOUT 99 MODE aioe A oad 99 PM MODE eia 100 PVE ROW CE 100 100 PEM 101 RAN26 101 REF VADU 101 PM REF VALUE 102 PM REF STO 102 PNERESPOBSIVIU 102 103 Preface 103 PIV SPOUSE iti oerte d RUE emet eere 103 9 59712 PINE SRO US 103 8 3 9 79 PM STA LMAX P aive eu deb tet 104 9 9 9474 PMESTAT IMBADN 104 FEMIN 104 5 3 3 16 PMESTAT MAXMTIN aito tte 104 8 3 3 77 PM STAT SDEViation 105 105 8 33 79 PNETRIG EX Tefnal Litter tret eterne 105 6 5 2 00 PM TRIG EO Ternal one nS 106 8 3 3 8 PME TRIG EDGE 106 8 320 602 PM TRIG a 106 8 33 83 PM TRIGHOLDOTE eret teeth 107 9 04 PM TRIG HOLDO P 107 325 8 PMT RIG STAR T a 107 PM TRIG STAR D 108 PM TRIG STOP A bn ceat 108 108 5 3 3 89 PME TRIGSS DAE 109 3 5 90 PVETRIGISDANTE Idein 109 5 9 2520 ete Ernte 109 8 22 92 PMET RICE VALUE 110 5 2 9 09 PM TRIG TIME 110 TIME 110 5 9 9 95 PNE UNITS 110 S
4. CW Cont Range 110 0 pw A 4007 nm 37 89 Hint Press Setup to enter measurement setup Auto E Figure 29 j onfi 9 d Manual Range mode Mode Range Auto 400 37 89 Hint Press Setup to enter measurement setup MMC Contig Figure 30 Auto Range mode Figure 31 This screen is displayed after pressing the Config soft key 46 4 1 6 2 4 1 6 3 4 1 6 4 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 the 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 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 nam
5. ccccceccecceccccecceccececceccecescessececceseees 75 Preface 8 Communication Command Reference 77 8 1 Model 1936 2936 Series Remote Interface Commands 77 0 2 Command OVerview 77 8 2 1 Activate a Specific 78 5 9 Command DeScriplITOD 78 So Command CIOSSOIEV nacio e 78 8 3 2 Display Commands 80 o9 1 JIDISP BRIGHT 80 8 02 2 DISP BRIGHT EP acd et toad 81 8 3 3 Power Meter 81 ATON NN 81 81 MEC on rd 82 TADIDR a a 82 82 83 2205 5 83 5 9 9 0 ECH 83 5 5 999 84 8 25 54 10 ERROS 84 L ERRSTR T 84 8 3 3 2 85 8 3 3 13 PM ANALOGFILTER 85 14 PMEANASEOCEIMBD ete 85 5 9 9 l PM ANALOG 85 8 53210 PMEANALOG OWT eneee 86 0 9 9 17 PNEANA LOG 86 rev eR RP P a t ud 87 SaaS PM A TT irea cuntur ou 87 20 PM ATTS N A Eo RE 87 SS MM PNTA UNE S A E EEE 87 PM AUTO 88 PM CALDA TE 88 5 229 224 PM CALTE MP 88 Be Mi CHANA 89 8320 aenneren AN 89 5 5 5 2 PNM CORR 89 5 5 2428 PM CORR aarti acuta aA
6. TT 21 Frame or Chassis Terminal Symbol ccccccceccccceeeeeeeeeeeeeees 21 USB Connector S110 21 WEEE Directive 21 AC Receptacle Warning 23 Locations of warnings on the rear 24 Front Panel ay oae nO RED eec du 33 19536 C Rear Panel Layout cei etre eerte ir tea vi ied 35 2930 C Rear Pane Lay OU 36 PMI RACK mounting 38 PM2 RACK mounting kit 39 Mounting details for the PMI RACK mounting 40 41 PONE S WII leoni tena Eid 41 Navigation Selection and Setup Enter 42 IVT CCM EE T 42 Measurement Setin s 43 es EUR POEM 43 Channel 43 DOI Keys e a TE 44 Dedicated RR 44 Manual Range 110 UR PES paetos ber 45 Auto Range iode ba da bla 45 This screen is displayed after pressing the Config soft key 45 Mlode selectonsefe To uino doe abd dac om ho oM adn dod 46 Measurements on iuo esee asc an hau tia quon n ipd itia REE 46 46 Falter configuration SCreen s oe te AR ed ade 47 Digital Piet COIUTIB coe rri Et et eee te etis tentes 47 dite oni oup A brodo
7. 12 1 12 2 Appendix 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 1 disabled the errors are not returned immediately and the ERR 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 1 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 e Using a number as a command mnemonic e Using the wrong parameter type e Using ASCII characters outside of a string constant that are not defined by the
8. 90 83329 PM DETMODE L irienn toe Reo ted 90 5 2 2 90 PM DET SIZE 90 Preface 8 3 3 31 8 3 3 32 8 3 3 33 8 3 3 34 8 3 3 35 8 3 3 36 8 9 9 97 8 3 3 38 8 3 3 39 8 3 3 40 8 3 3 41 8 3 3 42 8 3 3 43 8 3 3 44 8 3 3 45 8 3 3 46 8 3 3 47 8 3 3 48 8 3 3 49 8 3 3 50 8 3 3 51 8 33 32 8 3 3 54 8 3 3 56 1 8 3 3 58 8 3 3 59 8 3 3 60 8 3 3 61 8 3 3 62 8 3 3 63 8 3 3 64 8 3 3 65 8 3 3 66 8 3 3 67 8 3 3 68 8 3 3 69 PM DE TSN eneen s 90 PNEDIGITAEBIE DER e 91 PM DIGITACHLIER uident toe th 91 PM 91 PM DS BUFI 92 PM DS BURIE aere EA ATO 92 PM DS C Eei aone d in ENA 92 DSF COON Gov uta 92 an sais abet 93 PM DS EN3SDIG ue hens 93 PNEDSAOET a use tlie eases 93 PM PS 94 PM DS UNG Cry al ossi ota apes 94 PM DS SAVEBUFFER a n etit eimi 94 PNEDS SIZE 95 DS SIZE 95 PM PDS nd tees 95 PESE FILI 96 DG TC 96 PMG FRE QUCHCY Enea 96 PM ame E E 97 PN 97 PM MAX Lambda Mt 97 MAX POWT ieget sieut epe verint tu uda 98 ain DG 98
9. Figure 70 Fuse Replacement 126 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 e Disconnect the power cord from the instrument e Pry out the fuse cover and remove the fuse holders e 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 e Reconnect the power and turn on the instrument e Ifthe problem persists contact Newport Corporation for service Obtaining Service Models 1936 2936 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 e Instrument model number on the rear panel e Instrument serial number on rear panel e 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 10 4 Service Form CN Newport Corporation U S A Office 800 2
10. Paene 47 E 48 Measurement Settings 48 Accessing the Trigger Setup Serec srein 51 Tris ser Delay WavelODitis uet on oet ota ei tete 51 Predetined color scheme S ia ele rie EE verfo ei 53 DE PUP SCL CI TT 53 Preface Figure 44 SOR CI di dei iei tional 53 Figure 45 uations 54 Figure 46 54 Figure 47 api ret eer ane e ae Re ace eee re entre ret 55 Figure 48 Matn TING 56 Figure 49 Ivfathi congiurati on Sete ello ee nn Pee utens 56 Figure 50 Measurement SeH IBS etas ad ond aed ads 57 Figure 51 C rrecHon SEIS uero 27 Figure 52 Mode SelecHon AER 58 Figure 53 CIS DIIS actae ota vU 58 Figure 54 ANJOS 58 Figure 55 AOZO O eu 59 Figure 56 Anoe Needle display astantes 60 Figure 57 Vertical chart with 3 measurements per 60 Figure 58 Vertical chart with 1 measurement per line 60 Figure 59 Measuring Laser Pulse Energy via a Thermopile in CW Integrate EUER EROR TENURE EU 68 Figure 60 Apphcation Iront Panel soie 71 Figure 61 Application Advanced Options Configuration 22 Figure 62 RS 232 9 Pin to 9 Pin Cable Connec
11. 640 kHz 1600 kHz 1600 kHz 1900 kHz 640 kHz 1900 kHz Maximum Pulse 10 kHz 10 kHz 10 kHz 10 kHz 10 kHz Repetition Rate RMS Measurement Maximum Pulse Repetition Rate 2 kHz 10 kHz General Information 29 Analog Output Output Output Range Full Scale Voltage Load gt 100 kQ Full Scale Voltage 0 5 V 1V 2 5 V Accuracy 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 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 Maximum Repetition Rate refers to the meter pulse by pulse measuring capability Due to its high bandwidth the 1936 2936 can take in signals with higher repetitive rates and outputs them undistorted at the Analog Output lhe Temperature Range is detector dependent The Frequency Measurement min max values are signal shape dependent The specified frequency measurement range and accuracy are defined for an amplitude of half full scale 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 7 Unpacking and Handling It is recomme
12. 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 keys to select wa velength BEEN Figure 37 Wavelengths screen 48 4 1 6 6 4 2 4 2 1 4 2 1 1 4 2 1 2 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 key the instrument takes the displayed numeric value as offset and subtracts it from all the subsequent measurements When the instrument 1s zeroed the offset value is displayed on the main screen above the numeric value see Figure 38 ET TB a WIE Wi d Lor it 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 Detector 818P 001 12 S N e One is the convenience the user has to change all the measurement settings within one screen Digital filter 4 Unit e The other is information presented Wa to the user about the detector used From the default screen when
13. For the purposes of this manual any string enclosed by lt gt 1s considered 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 74 7 2 5 7 2 6 7 2 7 7 2 8 7 3 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 CR 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 RS 232C Communication Before communicating with the 1936 2936 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
14. Thermopile Response Displayed Signal 1 sec 5 sec Figure 64 Thermopile Signals exhibit I to 10 second time constants Pulse Energy Detector Signals A Newport Energy detector will respond to a single radiant energy pulse with a voltage pulse at its BNC output This pulse exhibits a sharp voltage rise to a peak followed by a slower voltage decay that undershoots zero volts before settling back to zero volts When a detector is operated within its proper limits the voltage difference from immediately before the sharp rise to the peak is linearly proportional to the radiant energy If a second pulse arrives before the undershoot rises back to zero volts the voltage rise from this pulse will start from an initial negative value At sufficient energy pulse repetition rates a negative baseline voltage will develop from which the voltage rise must now be measured to achieve accurate energy readings The 1936 2936 Series contains baseline capture circuitry that maintains its accuracy specifications over rep rates ranging from single pulse to 10 KHz 9 7 Principles of Operation 117 1 0 0 5 hh VOLTS 0 4 0 2 i 0 02 0 04 0 06 0 05 0 10 TIME sec Figure 65 Typical Newport Energy Detector Signal Waveform An energy detector signal sharply rises to a peak value and then decays going somewhat negative before finally returning to zero The energy in the radiant pulse is proportional to the height of the
15. oldest 5 newest 5 Sets the size of the Data Store buffer Return the sizes of the Data Store buffer 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 calculating 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 138 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 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 UNITs PM UNITs PM REF VALue PM REF VALue PM REF STOre PM ZEROSTOre PM ZEROVALue PM ZEROVALue Number of Parameters NONE NONE NONE 1 NONE NONE NONE 1
16. 4 2 1 1 Wavelength Selection 48 4 2 1 2 Range Selection and Range Type Rng type 48 4215 Attenuator ect P EH et 49 4 2 4 Analog and Digital Filter Selection 49 22 1 5 le GLO 49 4 2 L0 Mode Selector sd e eta ren o tva d mendis 50 Z2 Lo tuis 50 4 2 1 8 Number of Digits Setting sss 50 AZAD Offset Field aderire 50 4 2 2 Detector Information ni EHE 50 51 4 5 1 51 2 5 2 edi 51 5 rieger SOPs 22 44 Mayelenpti Se Hio 32 ado MISA EUR A 53 4 6 USB Address and RS232 54 Preface DEST 54 d ol 55 AS PUNCHONS 56 4 9 Measurement Correction Settings 57 210 Display Modesa t teste pt I Uca moe atn 58 to de ets ati et cians 58 A 10 2 Analog alin E 58 Analos Needle 60 A 10 4 PRI 60 4 11 Firmware Upgrade Procedure ys ee om er pe etn 61 Performing Basic Measurements 63 Sb GUC ON tao i eeu eM 63 5 2 Measurement Modes and 63 5 3 CW Measurements with 918D or 818P Detectors 64 5 4 Peak to P
17. The display will display a new integrated energy measurement every second The readings will start decreasing rapidly after the first couple of measurements due to the decline in heat flow from the relatively slow thermopile detector When the displayed reading drops again to the point of essentially displaying the detector s noise component the individual stored readings may be retrieved via the USB interface Summing these readings will yield the pulse energy NOTE This method works best if the integrated result of the pulse signal is much larger than the integral of the detector s noise component If the integrated result of the pulse is not much larger then error in the measurement will arise due to the uncertainty generated by integration of the noise component terms NOTE The time constant of a thermopile detector determines the amount of time that one should expect to wait when making an integrated energy measurement of an optical pulse Typically an accurate value will be arrived at 5 time constants after the arrival of the optical pulse Refer to the detector s manual for the proper time constant 5 9 Performing Basic Measurements 69 Frequency Measurements 918D or 818E Detectors The Frequency Measurement in the 1936 2936 Series is a background task It runs all the time and the user can access it via the Statistics screen see Section 4 7 Because of this advanced way of measuring the frequency the user has the conv
18. 1 2 00 0001 2 0 120 2 12 1 2 lt number gt defined as binary The 1936 2936 Series recognizes unsigned binary numbers in the range of 0 to 65535 decimal or 0 to 1111111111111111 binary Binary numbers are represented using only the digits 0 and 1 A binary number has the following format B lt binary gt Where B mandatory binary number header binary binary digits 0 s 1 s 132 Appendix A Example All numbers below represent the decimal value 129 B 10000001 b010000001 b 10000001 3 lt number gt defined as octal The 1936 2936 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 9201 4 lt number gt defined as hexadecimal The 1936 2936 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 mandatory octal number header lt hexadecimal gt hexadecimal digits 0 9 and A F Example All numbers below represent the decimal value 127 7 HOO7F h7f 12
19. 3 3 1 System Overview Front Panel Elements On the front panel of the 1936 2936 Series there are the following elements e A faceplate with an active color liquid crystal display e USB A connector e Power switch Setup Enter and Esc keys e Rubberized horizontal left right and vertical up down arrow keys e 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 e Six rubberized buttons with dedicated functions Range Mode Hold Filter Lambda A Zero Understanding 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 mete
20. 3 71 8 3 3 72 Communication Command Reference 103 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 1 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 Related Commands PM RUN PM MODE PM SPOTSIZE Description Set detector spot size Syntax PM SPOTSIZE value Remarks This command sets the detector spot size By default the spot size is same as a detector s surface area This value is 2 2 used to when measurement units are set to W cm or Sun Argument Type Description Value float Spot size cm Related Commands PM SPOTSIZE PM DETSIZE PM SPOTSIZE Description Detector spot size query Syntax PM SPOTSIZE Remarks The PM SPOTSIZE query returns the detector spot size in cm 104 8 3 3 73 8 3 3 74 8 3 3 75 8 3 3 76 Communication Command Reference Response Type Description Spot size float detector spot size in Related Commands PM SPOTSIZE PM DETSIZE PM STAT MAX Description Statistics Maximum Value Query Syntax PM STAT MAX Parameters None Function This query returns the maximum value in the statistics buffer Returns lt max gt lt max gt is of type lt num
21. 99 yw Hint Press left right arrow key to switch channels Statistics Math Figure 56 Analog Needle display 0 678 uw 38 97 w 0 000 0 1 3 Avg Peak 3 997E 5 mui PL Figure 57 Vertical chart with 3 measurements per line 3 1989 0 000 Figure 58 Vertical chart with 1 measurement per line Figure 57 shows 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 same list 4 11 System Operation 61 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 1 an easy straight forward process Simply copy firmware files PM293xAPP EXE and XMLFILEx 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
22. Description Timeout int measurement timeout in milliseconds Related Commands PM MEAS TIMEOUT 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 DC Continuous DC Single Integrate Peak to peak Continuous Peak to peak Single Pulse Continuous Pulse Single RMS A A o N KF 100 8 3 3 60 8 3 3 61 8 3 3 62 Communication Command Reference Related Commands PM MODE PM MODE Description Syntax Remarks Response Mode Acquisition mode query M MODE The PM MODE query returns an integer indicating the present acquisition mode Value Description DC Continuous DC Single Integrate 0 1 2 3 Peak to peak Continuous 4 Peak to peak Single 5 Pulse Continuous 6 Pulse Single 7 RMS Related Commands PM MODE 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 1 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 sta
23. Ll Detimitions and Symbols odis vu ih 19 1 1 1 General Warning or Caution eeeeeeeeeeeeee 19 KEZ SNOEK sese ded 19 1 1 3 Protective Conductor 19 1 1 4 European Union CE 20 1 1 5 Alternating voltage symbol eeeeeeesesss 20 INK 20 EET OM CCP 20 Pals 21 LLS Fraime OF CHASSIS 21 USB Connector SVr DOl 21 1 1 11 Waste Electrical and Electronic Equipment WEEE 21 L2 CautlOrfisia oerte pter Ds iode phe te uH EVER 22 LA 22 1 2 2 AGEN ral CAUOflS utet 23 Lo Jbocattonot Wafrnilb95 oo 24 Pane ada 24 2 General Information 25 2l JT ttOGUCLOIT ooo HE 25 2 2 Optical Meter Functionality 55e ee etta 26 2 5 Model 1996 6 cet E toi 26 24 Model 2930 ono ep 26 2 9 Mna mute 26 2 07 259 DECTHICOUIOTIS cater ee ee 26 2 651 Physical Specifications ion oo e does Due 26 20 2 Electrical SDOCIIICOtlODS 2 Meni aC ane and EIandltig t tdeo Fe 29 2 5 Inspection Tor Damage 29 2 9 Available Options and
24. 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 1936 2936 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 1s entering commands the line may be edited by using the backspace key sending an ASCII decimal 08 code This mode is especially useful when a simple terminal application is used to communicate with the power meter When echo mode 1 disabled normal mode the power meter does not generate a prompt or echo character back over the interface This 1s the default state of the echo mode 7 3 1 7 3 2 7 3 3 7 4 Computer Interfacing 75 CABLE TERMINATORS RS 232 9 pin to 9 pin 9 PIN PIN 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 4 5 6 7 8 9 oon C X h C9 r2 Figure 62 RS 232 9 Pin to 9 Pin Cable Connections Cable terminators RS 232 Setting Echo Mode From the Keypad The echo mode can be turned ON OFF from w
25. 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 float Detector surface area Detector serial number query PM DETSN 8 3 3 32 8 3 3 33 8 3 3 34 Communication Command Reference 91 Remarks For example Response serial number The PM DETSN query returns the serial number of the detector 0001 Type Description string Detector serial number PM DIGITALFILTER Description Syntax Remarks Argument Value Digital filter select command PM DIGITALFILTER value The PM DIGITALFILTER command specifies the digital filter setting Type Description int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DIGITALFILTER Description Syntax Remarks Argument Value Digital filter query PM DIGITALFILTER The PM DIGITALFILTER query returns the present digital filter setting Type Description int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DPower Description Syntax Remarks Response Power Detector power query PM DPower 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 defaul
26. 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 2936 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 CHANnel 2 command was issued over USB interface all subsequent commands issued through RS 232 and USB interfaces will be addressed to channels A and B respectively Some commands do not apply to a particular channel such as BEEP The behavior of these commands is independent of the channel currently selected Command Description Command Glossary Root level Commands Queries Summary Function fk Parameters No NONE Identification query 81 1 Recall configuration settings 81 1 Save configuration settings 82 1 Sets the instrument s USB address 82 NONE Returns the instrument s USB address 82 1 Turns the beeper or off or beeps once 83 NONE Returns the status of the beeper 83 1 S
27. STANDOFF 4X MG PLASTIC SHOULDER RACK DRESS WASHER RACK MOUNT PANEL SINGLE CHANNEL SHOWN ZX SIDE RAIL 4X 8 42 x 5 15 UC PAM HO SCREW 4X X 12 HD PH SCREW 4X 16mm PAM HD RACK DRESS SCREW 4x M6 BELLEVILLE WASHER 45 T HUT 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 four groups see Figure 20 Navigation Keys Reconfigurable also called Soft Keys Dedicated Keys Escape ESC Key Besides these keys the front panel has a Power switch and a USB connector at the lower left corner of the instrument CAS Pevuport Power Mater Model 2936 0 Setup Enter Key Navigation Keys Ju sm A Escape Key USB Connector Power Switch D esp _ Stati TIN wy Dedicated Keys Reconfigurable Soft Keys Figure 20 Front Panel keys EM A Figure 21 Power Switch 4 1 1 Power Switch The power switch is a push button on the lower left corner of the chassis that turns the unit ON or OFF The power switch is distinguished from other keys 42 System Operation on the front panel its circular shape The power to the unit 15 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 T
28. Sine Wave Signal 250 kHz 2 kHz 8 kHz 80 kHz 200 kHz 200 kHz Frequency Measurement Peak Peak Current Measurement Low Power Semiconductor Photodiode Sgarra 30Hz 20Hz 20Hz 20Hz 20Hz 20Hz de 1kHz 1 kHz 8kHz 80kHz 160kHz 130 kHz ee EE 28 General Information D C Voltage Measurement Thermopile Signal Range 2 a Jales Full Scale Voltage 25 0 mV 250 mV 2 50V 25 0 V 130 V 76 3 nV 763 nV 7 63 uV 76 3 uV 763 uV 3 96 mV A 0 3 0 3 0 3 0 3 0 3 0 3 Filtered Accuracy Maximum 5 Frequency Measurement 130 Hz 20 Hz 0 5 Hz 0 5 Hz 0 5 Hz 220 0 5 Hz 200 Square Wave Signal 200 kHz 220 kHz 220 kHz 250 kHz kHz kHz Frequency Measurement 130 Hz 20 Hz 20 Hz 20 Hz 20Hz 220 20 Hz 200 Sine Wave Signal 200 kHz 220 kHz 220 kHz 220 kHz kHz kHz Frequency Measurement T B 5 8 Bandwidth 640 kHz 1600 kHz 1600 kHz 1900 kHz 640 kHz 1900 kHz Signal to Noise Ratio typ 80dB 90dB 108dB 108dB 108dB 108dB Pulse Voltage Measurement Energy Pyroelectric 3 2 8 o Full Scale Current 25 0 mV 250 mV 2 50 V 25 0 V 130 V 76 3 nV 763 nV 7 63 uV 76 3 uV 763 UV 3 96 mV ur 130 Hz 20 Hz 0 5 Hz 0 5 Hz 0 5 Hz 220 0 5 Hz 200 Pulsed Signal 200 kHz 220 kHz 220 kHz 250 kHz kHz kHz Frequency Measurement 1 0 1 0 1 0 1 0 1 0 1 0 Accuracy Bandwidth
29. 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 delay between an event at the trigger input e g rising edge and 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 1s an event that tells the system when to take a measurement or a group of measurements It can be set in different ways Continuous The system is always triggered External Trigger TTL Signal The system is triggered 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 Soft Key The system can be triggered with a Soft Key that appears in the main screen 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 52 4 3 3 4 4 System Operation Trigger Stop The Trigger Stop is an event that tells the system when to sto
30. 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 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 112 8 3 3 99 Communication Command Reference Related Commands PM ZERO PM ZEROSTO 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 9 1 9 2 Principles of Operation Introduction The 1936 2936 Series Power Meters electronics adapt to a number of signal measurement tasks DC current or voltage AC peak to peak current or pulse voltage or integrated DC current or voltage signals This versatility is required to handle the various signals that Newport s Low Power High Power Energy and other detector families generate These detector families are based on semiconductor thermopile pyroelectric as well as radiometric photometric and other detectors The detector data 1s introduced to the 1936 2936 Series by way of a calibration module specific to the detector in use
31. and Utilities CD Power cord 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 1936 2936 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 1f desired Provide adequate distance between the 1936 2936 Series Optical Power Meters and adjacent walls for ventilation purposes Approximately 2 inch spacing for all surfaces 1s 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 1s properly polarized and properly grounded 2 13 General Information 31 e Set the mains selector tumbler to the voltage that matches the power outlet AC voltage e 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 s
32. 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 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 Wuxi Co No 36 38 Xikun Road WSIP Wuxi Jiangsu 214028 China Telephone 86 510 8018 3000 Fax 86 510 8018 3289 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 clearly marked with the RMA and we will either repair or replace it at our discretion Newport is not respon
33. 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 loan rent lend or otherwise transfer the backup copy to another user End User Proof of L
34. 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 e 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 This license specifically prohibits any other use of the software programs or functi
35. 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 8 3 3 45 8 3 3 46 8 3 3 47 Communication Command Reference 95 Remarks The PM DS SAVEBUFFER command saves the current user Data Store for the current channel to a file named PM2936xxx dat on the WinCE compatible USB Flash Disk plugged into the USB Host port on the front of the Power Meter 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 1 to 250000 Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS UNITs Description Data store un
36. lambda for the last read detector is returned Type Description int Wavelength in nanometers nm Related Commands PM MAX Lambda PM MIN Power Description Syntax Remarks Response Power Minimum power query PM MIN Power The PM MIN Power returns current range s minimum readable power Type Description float Power in Watts Related Commands PM MAX Power PM MEAS TIMEOUT Description Syntax Remarks Measurement timeout set command PM MEAS TIMEOUT value 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 timeout period when the power meter 1s in Peak Peak Continuous mode 8 3 3 58 8 3 3 59 Communication Command Reference 99 2 Auto ranging 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 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
37. 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 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 links contained in third party sites or any changes or updates to third party sites MS or M
38. pressing 771 gger Correction the Setup Enter key the 1936 2936 Figure 39 Measurement Settings series displays the Measurement screen 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 Range Selection and Range Type Rng type The Range field has dual functionality 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 4 2 1 3 4 2 1 4 4 2 1 5 System Operation 49 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 Mod
39. query Syntax ECHO Remarks The ECHO query returns the echo status of the power meter Response Value Description status 0 Echo OFF 1 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 if 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 0 if no errors Related Commands 8 3 3 12 8 3 3 13 8 3 3 14 8 3 3 15 Communication Command Reference 85 PM ANALOGFILTER Description Analog filter select command Syntax PM ANALOGFILTER value Remarks The PM ANALOGFILTER command selects the analog filter setting Argument Value Analog Filter Value 0 None 1 250 kHz 2 12 5 kHz 3 1 kHz 4 5 Hz Related Commands PM ANALOGFILTER PM ANALOGFILTER Description Analog filter query Syntax PM ANALOGFILTER Remarks The PM ANALOGFILTER query returns an int
40. terms and symbols are used in this documentation and also appear on the Models 1936 2936 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 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 1s bonded to conductive accessible parts of the enclosure for safety purposes 20 Safety Precautions European Union CE Mark 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 fw Figure 5 Alternating Voltage Symbol This international symbol implies an alternating voltage or current On Figure 6 On Symbol Th
41. the right column has custom values When the user selects one of the predefined wavelengths in the left column the 1936 2936 Series looks up the wavelength in the responsivity table the detector calibration module If that exact value 1 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 4 5 System Operation 99 Display Color In a laboratory environment and 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 0706 7 Range Haa pw 400 39 87 tint Pres s ght anmo eyt swilc ch pte s i d a Ne egative black and White Positive black ind TE c Red screen r peter scree
42. 1936 2936 Series Optical Power Meters e 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 24 1 3 1 3 1 Safety Precautions Location of Warnings Rear Panel Electrical Hazard CAUTION DO NOT REMOVE COVER REFER SERVICING TO QUAUAED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT MODEL NO TRIG IN iine CA USA WEEE 13AUG2005 Frame or Chassis Terminal Fuse info TM MAX Power 1936C Shown Figure 13 Locations of warnings on the rear panel 2 1 General Information Introduction The 1936 2936 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 e Compatibility with Photodiode Thermopile and Pyroelectric detectors Low Power Semiconductor Family High Power Thermopile Family Energy Pyroelectric Family InGaAs Cooled Photometric PMT GaN PbS PbSe and HgCdZnTe e Measurement rate up to 10 kHz with internal sig
43. 22 6440 FAX 949 253 1479 NNevvport 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 return of goods please list any specific problems 128 Maintenance and Service This page is intentionally left blank 11 11 1 Appendix Syntax and Definitions Definition of lt string gt For convenience the 1936 2936 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 gt WY N lt string gt using double quotes this is a string lt string gt using single quotes this is a string lt string gt using no quotes thisisastring description of each type of lt string follows 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 CR ASCII decimal 1
44. 3 lt LF gt ASCII decimal 10 or End or Identify characters 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 15 terminated by another single quote A single quote may be embedded within the string by 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 is 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 lt string gt defined using no quotes 130 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 1st string 1S 2nd string a 3rd string string 4th string Sent this isastring Interpreted this 1st string separator character isastring 2nd string Sent w cm Interpreted w 1st string ERROR unrecognized character cm 2nd string Definition of number 1936 2936 Series recognizes four types as lt number gt thus any format may be used 1 number defined as floating poi
45. 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 50 4 2 1 6 4 2 1 7 4 2 1 8 4 2 1 9 4 2 2 System Operation Mode Selection This setting allows the user to change the measurement mode The available modes are as follows Continuous Wave Continuous Run CW Cont Continuous Wave Single Shot CW Single Continuous Wave Integral CW Integ Peak to Peak Continuous Run Pk Pk Cont Peak to Peak Single Shot Pk Pk Single Pulse Mode Continuous Run Pulse Cont Pulse Mode Single Shot Pulse Single 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 is 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 selected by pressing Left Right arrow keys The desired value can be accepted by pressing Setup Enter key Number of Digits Setting The 1936 2936 Series displays a default 4 number of digits To change these settings bring the cursor on top of the Num Digits field Hit the E
46. 90 PN 111 5 5 9 9 PNE ZEROS TOT 111 PM ZE ROV ALU 111 8 5 9 99 PM ZEROVA LCIS 75 112 9 Principles of Operation 113 DL 3inttoduCcHOll 113 22 cuite vta 113 9 3 JDivitized 114 94 Typical Detector Sienals cider dont een atone 115 9 5 Thermopile Detector Signals esee 116 9 6 Pulse Encrey Detector Signals er rien E eet torus 116 9 7 Peak to Peak Photodiode Detector Signals 117 9 8 Integration of Detector 51 15 118 ANOS om etd ta meminit ducat atat 119 Preface 10 11 12 13 14 15 9 10 Measurement Considerations 9 10 1 Detector Calibration and Accuracy 9 10 2 Quantum Detector Temperature Effects 9 10 3 Thermopile Detector Temperature Effects 9 10 4 Energy Detector Temperature Effects 2 10 5 ATubientand recs renal EWHeting saos oso oa OR ad Ves 9 11 Common Measurement Errors Maintenance and Service IO T Enclosure wcities chos eb LOD Fuse 10 Obliaimibs SCL UN TOA Appendix Syntax and Definitions PA Deintdonot Ste 25 De ni
47. Accuracy Newport Corporation calibrates its detectors using secondary standards directly traceable to the United States National Institute of Science and Technology NIST National Research Council NRC of Canada 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 is 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 response over its surface Therefore for the most reproducible measurements light should illuminate 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 is 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 a
48. At power up and RESET the 1936 2936 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 1936 2936 Series are discussed 1 Sections 3 Analog Signal Flow The detector signals can follow many different paths through the 1936 2936 Series input amplifier chain A block diagram of analog signal flow is shown in Figure 22 The actual flow path depends upon the detector type and the mode of measurement Analog Output Input C Programmable Programmable Voltage Bandwidth Amplifier Noise Filter Voltage Buffer Peak A Detector DC Baseline Detector Figure 63 Model 1936 2936 Series Analog Signal Flow Diagram Programmable Programmable Transimpedance Amplifier 114 9 3 Principles of Operation The analog signal flow path 1s primarily determined by the responsivity units of the detector The numerator of these units indicates 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 Responsivity units and signal flows for the various detector families are listed in Table 4 Detecto
49. EF STOre NONE Sets the user reference value for use in relative or dB readings 102 as the present reading PM RESPonsivity NONE Gets the responsivity currently used for making power 102 calculations PM RUN 1 Disables or enables the acquisition of data 103 PM RUN NONE Returns the present acquisition mode 103 PM SPOTSIZE 1 Sets the detector spot size 103 PM SPOTSIZE NONE Returns the detector spot size 103 PM STAT MAX NONE Returns statistics buffer maximum value 104 PM STAT MEAN NONE Returns statistics buffer mean value 104 PM STAT MIN NONE Returns statistics buffer minimum value 104 PM STAT MAXMIN NONE Returns statistics buffer maximum minimum value 104 PM STAT SDEViation NONE Returns statistics buffer standard deviation value 105 PM Temp NONE Returns the 918 detector s temperature in degrees Celsius 105 PM TRIG EXTernal 1 Set external trigger enable 105 PM TRIG EXTernal NONE Returns external trigger enable 106 PM TRIG EDGE 1 Set external trigger edge select 106 PM TRIG EDGE NONE Returns external trigger edge select 106 PM TRIG HOLDoff 1 Set external trigger holdoff time 107 PM TRIG HOLDoff NONE Returns external trigger holdoff time 107 PM TRIG START 1 Set the optional start event 107 PM TRIG START NONE Returns optional start event 108 PM TRIG STOP 1 Set the optional stop event 108 PM TRIG STOP NONE Returns optional start event 108 PM TRIG STATE 1 Set the trigger state 109 PM TRIG STATE NONE Returns the trigger state 109 P
50. IG EXTernal PM TRIG HOLDoff PM TRIG START Description This command sets the optional start event Syntax PM TRIG START option Parameters The parameter option is of type lt number gt and is an integer from 0 to 3 Argument Value Description option 0 Continuous measurement 1 Measurement starts when an external trigger occurs 2 Measurement starts when a designated Soft key 1s pressed 3 Measurement starts when PM TRIG STATE 1 command 15 issued 108 8 3 3 86 8 3 3 87 8 3 3 88 Communication Command Reference Related Commands PM TRIG START 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 PM TRIG STOP Description This command sets the optional stop event Syntax PM TRIG STOP lt option gt Parameters The parameter option is of type lt number gt and is an integer from 0 to 6 Argument Value Description option 0 The measurement never stops 1 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 PM TRIG STOP Descript
51. M Lambda Number of Parameters 1 1 1 NONE 1 Function Sets the backlight level of the display and the keypad Returns the backlight level of the display and the keypad Switches to the n screen display Returns displayed screen number 0 n a screen number 1 Main etc 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 Returns the model number of the detector Returns the serial number of the detector 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
52. M TRIG VALUE 1 Set the measurement level for trigger stop condition 109 PM TRIG VALUE NONE Returns the measurement set level for trigger stop condition 110 PM TRIG TIME 1 Set the time duration for trigger stop condition 110 PM TRIG TIME NONE Returns the time duration for trigger stop condition 110 PM UNITs 1 Selects the units for readings 110 PM UNITs NONE Returns an integer indicating the selected units 111 PM ZEROSTOre NONE Sets the zeroing value with the present reading 111 PM ZEROVALue 1 Sets the zeroing value 111 PM ZEROV ALue NONE Gets the zeroing value 112 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 8 3 2 2 8 3 3 8 3 3 1 8 3 3 2 Communication Command Reference 81 Argument Type Description Brightness int Brightness in levels from 0 to 7 Related Commands DISP BRIGHT DISP BRIGHT Description Display brightness query Syntax DISP BRIGHT Remarks The BRIGHT query returns the display brightness setting Response Type Description Brightness int Display brightness 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 Cont
53. Model 1936 2936 C Sene Single and Dual Channel Optical Meters Users Manual QAD NNevvport Experience Solutions Preface Preface EU Declaration of Conformity We declare that the accompanying product identified with the C mark complies with the requirements of the Electromagnetic Compatibility Directive 2004 108 EC and the Low Voltage Directive 73 23 EEC Model Number 1936 C 2936 C Year C mark affixed 2008 Type of Equipment Electrical equipment for measurement control and laboratory use in industrial locations Manufacturer Newport Corporation 179 Deere Avenue Irvine CA 92606 Standards Applied Compliance was demonstrated to the following standards to the extent applicable BS EN61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirements This equipment meets the CISPR 11 2006 A2 Class A Group radiated and conducted emission limits BS EN 61010 1 2001 2 Edition Safety requirements for electrical equipment for measurement control and laboratory use 2 Bruno Rety Daniel Cabbell Group Director of PPT Instrument and Motion Europe Director of Operational Excellence Zone Industrielle 1791 Deere Avenue 45340 Beaune la Rolande France Irvine Ca USA Preface Manual Updates Dear Customer In an effort to keep the 1936 2936 Series Optical Meters optimized for your applications Newport will on occasion update existing and add ne
54. NGEMENT 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 e SOFTWARE as a Component of the DEVICE transfer This license may not be shared transferred to or used concurrently on different computers The SOFTWARE is licensed with the DEVICE as a single integrated product and may
55. SB port The installation 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 Es Newport Optical Power Meter Application m o EJ File View Tools Help a p Channel A IChannelB is Connect Button DC CONT DC CONT Step Indicator 47 758 45 032 ow Range _0 1 2 3 4 5 6 7 range 0 1 2 3 4 5 6 7 Wavelength 800 nm Wavelength 700 nm Power Power 0 Connected ADDR 4 none 12 6 2005 9 38 Figure 60 Application front panel 72 6 3 6 4 Software Application 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 Attenuator m Attenuator m Wavelength 200 Wavelength 700 Units w Units A Mode DC CONT Mode CONT Figure 61 Application Advanced Options Configuration Tab The application is designed to have menus similar to standard Windows applications like MS Word to ease usability Menu Structure To Exit the application go t
56. VICING TO QUAUFRED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT MODEL TRIG S N XXXXX IN hie CA USA WEEE 12AUG2005 D 100 120 06A 1 250 AB 220 240 04A 1 250 TA Figure 15 1936 Rear Panel Layout System Overview CAUTION DO NOT REMOVE COVER REFER SERVICING TO QUAURED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE NEWPORT t MODEL NO TRIG S N IN hina USA WEE 13AUG 2005 MEE 100120054 250v NO 220 240 0 44 T 250v E S N N ae _ Figure 16 2936 C Rear Panel Layout The rear panel also has an AC input power connector IPC with 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 CAUTION There are no user serviceable parts inside the power meter Work perfor
57. W Integrate Analog needle the Mode selection screen 1 displayed einst L Vertical chart k Pk Single Figure 52 the display mode can be BMS selected from the second column Numeric Display The numeric display is the default An Dig display of the 1936 2936 Series The a numeric display shows the current Range Auto measured value of the primary 400 nm channel 0 4 6 m Hint Press left right arrow key to switch channels uu Statistics Figure 53 The Numeric display Analog Bar The Analog Bar display mode brings a bar graph below the numeric Mode CW Cont display The bar graph is white and is follows the value showed by the y 6 Fi y numeric display The minimum and a m J VV maximum labels displayed just below Min 15 98 pW 40 59 pW the bar graph represent the input range the unit is currently set on For E O Oe eee 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 Figure 54 Analog Bar System Operation 59 The major ticks represent 10 of the range and the minor ticks represent 5 of the range If the Soft key labeled Show is selected the maximum value is retained and displayed in the bar graph with red color The red bar 1s updated with each measurement if the current measured value 1s larger than the largest of the
58. a 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 1 not corrected for temperature Thermopile Detector Temperature Effects Thermopile Newport High Power detectors are significantly affected by temperature fluctuations arising from airflow disturbances As the detector 15 a temperature measuring device airflow disturbances set a practical lower limit on the power that a detector can measure In order to get the most out of any thermopile detector be careful to shield the detector from airflow disturbances Common sources of disturbance are air conditioners and people walking past Energy Detector Temperature Effects Pyroelectric Newport Energy detectors are AC coupled devices and thus are not susceptible to temperature induced DC signal offsets or noise floor changes One generally does not need to take much precaution with pyroelectric detectors except to make sure that their damage threshold is not exceeded 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 e
59. alog filter digital filter or analog and digital Returns the filtering operation no filtering analog filter digital filter or analog and digital Returns the measured frequency value Sets the wavelength for use when calculating power Gets the selected wavelength in nanometers Returns the longest calibrated wavelength in nanometers Returns the maximum readable power in present range 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 79 No 80 81 85 85 85 85 85 86 87 87 87 87 88 88 88 89 89 89 90 90 90 90 91 91 91 92 92 92 92 93 93 93 94 94 94 95 95 95 96 96 96 97 97 97 98 98 98 98 99 Communication Command Reference Name Number of Function Page Parameters No PM MODE 1 Acquisition mode select 99 PM MODE NONE Returns the currently selected acquisition mode 100 PM Power NONE Returns the power in the selected units 100 PM PWS NONE Returns the power with status 100 Selects the gain stage when making readings with the detector 101 PM RANge 1 head within a range from 0 to 7 with zero being the highest gain PM RANge NONE Returns an integer indicating the current range 101 PM REF VALue 1 Sets the user reference value for use in relative or dB readings 101 PM REF VALue NONE Returns the user reference value 102 PM R
60. an see the detector active area as he she moves around then the detector registers this as a changing ambient DC signal For the 918D series detectors also 818 low 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 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 In case of higher power measurement with the 918D or 818 XX detector the attenuator should be used to avoid damage or saturation of the detector The attenuator use 15 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 1s no switch built into the detector head hence the user will have to manually select attenuator option status on the meter t
61. 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 and the main numeric field the middle of the screen shows the measurement in progress on channel A The secondary channel B in this case 1s displayed in the upper right corner Figure 25 SEES 40 460 CW Cont it AUTO CW Cont Range Auto 400 nm 40 46 Hint Press left right arrow key to switch channels ae sta tistics Figure 25 Channel primary 780 nm Weer Hint Press left right arrow key to switch channels Figure 26 Channel B primary 44 4 1 4 2 4 1 6 System Operation 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 scre
62. anged 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 data 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 136 Appendix B This page is intentionally left blank 13 Appendix Legacy Commands Reference Name DISP BRIGHT DISP BRIGHT DISP SCReen DISP SCReen 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 DS BUFfer PM DS BUFfer PM DS CLear PM DS Count PM DS ENable PM DS ENable PM DS GET PM DS SIZE PM DS SIZE PM DS INTerval PM DS INTerval PM DS SAVEBUFER PM DS SIZE PM DS SIZE PM DS UNITs PM Lambda P
63. ber gt in exponent notation PM STAT MEAN Description Statistics Mean Value Query Syntax PM STAT MEAN Parameters None Function This query returns the mean or average of all the values in the statistics buffer Returns lt mean gt lt mean gt is of type lt number gt in exponent notation PM STAT MIN Description Statistics Minimum Value Query Syntax PM STAT MIN Parameters None Function This query returns the minimum value in the statistics buffer Returns lt min gt lt min gt is of type lt number gt in exponent notation PM STAT MAXMIN Description Statistics Max Min Query Syntax PM STAT MAXMIN Parameters None 8 3 3 77 8 3 3 78 8 3 3 79 Communication Command Reference 105 Function Returns This query returns the difference between the maximum 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 Remarks Response temp 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 1in exponent notation 918 detectors temperature query PM Temp The PM Temp query returns the 918 detector s temperature as a float in degrees Celsius Type Description fl
64. ber 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 15 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 15 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 15 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 55 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 15 filled as the next sample comes the system drops the first measurement the list number 1 shifts the entire list down and places the next measurement on the 10000 level The statistics are recalculated for the new list and the process repeats with the new measurement The Soft keys offer the user the option to clear the statistics at any time with Clear Stats soft key The Graph soft key Sec
65. bly 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 Figure 71 shows an exploded version of the 1936 C 2936 C 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 and 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 142 Rear Panel co A Front Panel Enclosure Disassembled 1936 2936 model Figure 71 End User License Agreement for Embedded Software Components You have acquired a device DEVICE that includes software licensed by Newport Corporation Newport from an affiliate of Microsoft Corporation 5 Those
66. cation Command Reference 93 Argument Type Description count int The number of measurements that have been collected PM DS ENable Description Enable Data Store Collection Syntax PM DS ENable enable Remarks The PM DS ENable enables or disables the collection of measurements in the Data Store Argument Value Description enable 0 Disabled 1 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 1s full Related Commands PM DS ENable PM DS ENable Description Syntax Remarks Argument enable PM DS GET Description Syntax Remarks Argument selection 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 Type Description string returns the single value specified 1 10 returns values in the range from 1 10 4 5 returns the oldest 5 values same as 1 5 5 returns the newest 5 values 94 8 3 3 42 8 3 3 43 8 3 3 44 Communication Command Reference Note depending on the number of data points
67. command language syntax 134 12 3 Appendix B e 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 Execution 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 1s 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 if commands are not terminated correctly Input buffe
68. commends annual factory re calibration to ensure the continued accuracy of power meter measurements Please refer to the Maintenance and Troubleshooting section for contact information for re calibration of your power meter Specifications Physical Specifications Dimensions 5 25 12 11 x 8 50 in 133 x 308 x 216 mm Weight max 12 4 Ib 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 General Information 27 Power 100 120 220 240VAC 10 50 60 Hz 70 Watts Display Graphical LCD VGA 5 6 in diagonal TFT color 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 Pollution Degree 2 Use Location Indoor use only 2 6 2 Electrical Specifications DC Current Measurement Low Power Semiconductor Photodiode Signal Range RARE EARS ESS Full Scale Current Accuracy Filtered Accuracy Maximum 7 4 Measurement Rate 10kHz 1 0 1 0 1 0 1 0 1 0 Signal to Noise Ratio 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB Frequency Measurement 0 5 Hz 0 5 Hz 05Hz 05Hz 05Hz 0 5 Hz Square Wave Signal 500 Hz 8 kHz 8 kHz 80 kHz 200 kHz 200 kHz Frequency Measurement 30 Hz 20Hz 20Hz 20Hz 20Hz 20Hz
69. d or not Response Value Description mode 0 Manual power meter ranging 1 Automatic power meter ranging Related Commands PM AUTO PM RANG 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 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 temperature float Returns the temperature at which the detector was calibrated 8 3 3 25 8 3 3 26 8 3 3 27 Communication Command Reference 89 PM CHANnel Description Syntax Remarks Argument Channel 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 PM 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 1 Related Commands PM CHAN PM CORR Description Syntax Remarks Argument value l value2 value3 Power measurement cor
70. e Remarks Indicates whether or not the attenuator for the 818 Series power detector is on the detector Argument Type Description Enable int Enable use of detector responsivity with attenuator available in the calibration module for 818 detectors Related Commands PM ATT PM ATT Description Attenuator enable query Syntax PM ATT Remarks The PM ATT query returns 1 when using attenuator calibration 0 when calculating power without attenuator data Response Value Description attenuator 0 Calibrating power without attenuator 1 Calibrating power using attenuator Related Commands PM ATT PM ATTSN Description Attenuator serial number query Syntax PM ATTSN Remarks The PM ATTSN query returns the serial number of the attenuator When no detector is found the power meter responds with no detector Response Type Description serialnumber string serial number of the attenuator Related Commands PM DETMODEL PM DETSN PM AUTO Description Auto range enable command Syntax PM AUTO mode Remarks The PM AUTO command sets the power ranging to either manual or automatic 88 8 3 3 22 8 3 3 23 8 3 3 24 Communication Command Reference Argument Value Description mode 0 Manual power meter ranging 1 Automatic power meter ranging Related Commands PM AUTO PM RANge PM AUTO Description Auto range mode query Syntax PM AUTO Remarks The PM AUTO query returns a value to indicate if auto ranging is enable
71. e 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 NOTE The Auto Range Mode is enabled for Pulse Energy Measurements 818E Detectors Attenuator On Off If the detector 1 equipped with an integrated attenuator e g 9180 Series the 1936 2936 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 NOTE The attenuator selection in the power meter is disabled and not supported for 818P or 818E detector The diffuser attenuator for 818E is sold separately 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 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
72. e Continuous Press the Lambda A key to set the measurement wavelength to the desired value Illuminate the detector and note the displayed value as the meter measures each laser pulse These readings represent the energies of the incident laser 5 7 5 8 Performing Basic Measurements 67 pulses The meter will display the last pulse energy measured until new pulse arrives Accurate measurements can be made for pulse repetition rates up to 10 kHz depending on the limitation of the specific detector use of course Signal Integration Measurements 918D or 818P Detectors This section describes the procedure for making a basic signal integration measurement while properly removing the influence of ambient light and other drift effects The 1936 2936 Series begins and ends the signal integration every second With 918D or 818P Detector connected to the meter turn the meter on Set the Mode to CW Continuous Set the Range to Auto and press the Lambda key to set the measurement wavelength to the desired value Cover or otherwise block the light source being measured turn Zero on and then set the Mode to CW Integrate Immediately upon entering the integration mode the meter will begin to acquire and integrate data The display value may reflect the integration of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors Uncover or trigger the s
73. e On Symbol in the figure above represents a power switch position on the 1936 2936 Series Optical Power Meters This symbol represents a Power On condition Figure 7 Off Symbol Off The Off Symbol in the figure above represents a power switch position on the 1936 2936 Series Optical Power Meters This symbol represents a Power Off condition 1 1 8 1 1 9 1 1 10 1 1 11 Safety Precautions 21 Fuses Figure 8 Fuse Symbol The fuse symbol in the figure above identifies the fuse location on the Models 1936 2936 Series Optical Power Meters Frame or Chassis Figure 9 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the 1936 2936 Series Optical Power Meters This symbol identifies the frame or chassis terminal USB Connector Symbol e Figure 10 USB connector Symbol The USB connector symbol in the above figure identifies the location of the USB communications connector 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 1s 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 22 1 2 1 2 1 Safety Precautions disposal will help to conserve natural resources and ensure that it 1s recycled in a manner that protec
74. e is displayed in the upper left corner Measurement Mode a Min Max bar Analog needle Vertical chart CW Single CW Integrate Pk Pk Continuous Pk Pk Single RMS CW Cont Dan ge uta 400 nm 40 46 Hint Press left right arrow key to switch channels Figure 33 Measurement is on hold Mode CW Cont Range Auto 37 89 Hint Press Setup to enter measurement setup Analog Digita E An Dg Confi g E Figure 34 Filter selection screen 4 1 6 5 System Operation 47 The fourth Soft key is used for filter any i IET SEX jl configuration When selected a screen as in Figure 35 1s 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 the instrument back to the main screen If the Enter key is pressed a selection 1s made and the instrument goes back to the main screen The digital filter values can be edited When one of the digital filter values 15 selected the right most soft key 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
75. e 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 to desired value Returns the digital filter setting Detector Power query 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 an
76. eak Power Measurements 918D Detectors 65 5 5 Power Ratio and Power Reference Measurements 65 5 6 Pulse Energy Measurements 818E Detectors 66 5 7 Signal Integration Measurements 918D or 818P Detectors 67 5 8 Measuring Laser Pulse Energy with an 818P Thermopile Detector SiG lS butt a beth este bu 67 5 0 Frequency Measurements 9180 or 818E Detectors 69 5 10 RMS Measurements 70 Software Application 71 CV CIVIC EP 71 02 HOD aestu 71 6 3 General Usai E E 72 0 4 Menu 12 Computer Interfacing 73 Pek 73 7 2 Computer Interface Terminology 73 7 2 1 lt gt Delimiting Punctuation 73 22 SOCR Caria OS 73 Fea PCC 73 cat ote an pis ette to bep dao xs 73 7 2 5 number Numerical 74 72 0 SUING TYPES 74 JT Command Temi a Om oed ooo Ioa tores 74 7 2 8 Response Termination essere 74 75 WS 232C Comin CaO E 74 7 3 1 Setting Echo Mode From the Keypad 75 7 3 2 Setting Echo Mode via Remote 75 Tos Serine the D SB AGS Sites eit E 75 7 4 USB Communication
77. econd With a 918D or 818P 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 and calculate RMS value of the data The display value may reflect the RMS of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors Uncover or trigger the source The displayed value should now reflect the detector signal RMS value The RMS value 1s calculated based on data acquired over a one second time period The formula used to calculate the RMS value is given below Where x 1s the signal measured n 1s the number of samples acquired over a one second period 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 6 Software Application 6 1 Overview The 1936 2936 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 1936 2936 Series using the U
78. eger indicating the present analog filter setting Argument Value Analog Filter Value 0 None 1 250 kHz 2 12 5 kHz 3 1 kHz 4 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 9 1 100 2 1 MO Related Commands PM ANALOG IMP PM ANALOG IMP Description Analog output impedance query 86 Communication Command Reference 8 3 3 16 8 3 3 17 Syntax PM ANALOG IMP Remarks The PM ANALOG IMP query returns an integer indicating the present analog output impedance Argument Value Output Impedance Value 0 50 9 1 100 2 1 MO Related Commands PM ANALOG IMP PM ANALOG OUT Description Analog output range select command Syntax PM ANALOG OUT range Remarks The PM ANALOG OUT command selects the analog output range Argument Value Max Output Range 0 IV 1 2V 2 SV 3 10 V Related Commands PM ANALOG OUT PM ANALOG OUT Description Analog output range query Syntax PM ANALOG OUT Remarks The PM ANALOG OUT query returns an integer indicating the present analog output range Response Value Max Output Range 0 IV 1 2V 2 SV 3 10 V Related Commands PM ANALOG OUT 8 3 3 18 8 3 3 19 8 3 3 20 8 3 3 21 Communication Command Reference 87 PM ATT Description Attenuator enable command Syntax PM ATT enabl
79. elect series or parallel connection of the transformer primaries for operation at 100VAC 120VAC 220V AC 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 220 VAC 240V AC settings CAUTION Permanent damage will occur to the power meter if the input power connector settings are at either 100 or 120VAC and applied power is above 180VAC RMS 32 General Information This page is intentionally left blank 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 1936 2936 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 the 1936 and 2936 products QA Pevuport Power Meter Model 2956 0 0 2300 cw 27021 mw 27 251 Figure 14 Front Panel Layout 34 3 2 1 3 2 2 3 3
80. ement Considerations Type of Error What should be done Radiometry Check that all of the light is actually hitting the detector Ambient 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 Check that the optical power density remains below damage the detector s saturation or damage Table 6 Common Measurement Errors 124 Principles of Operation This page is intentionally left blank 10 Maintenance and Service CAUTION There are no user serviceable parts inside the 1936 2936 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 1936 2936 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 CAUTION DO REMOVE COVER REPEL SEVITING FO CuAumes OGCONNECT POWER BEFORE REPLACING FUSE NEWPORT Pry open cover to remove fuses
81. en 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 26 Dedicated keys 4 1 6 1 System Operation Range Pressing this key reconfigures the Soft keys at the bottom of the screen as 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 can be seen in Figure 29 where the range is 1 000 W indicating a manual mode If the instrument is in Auto Range Mode the left most key 1s labeled Manual Figure 30 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 1s labeled Config This action displays the Range Configuration screen Figure 31 Here the user can select a certain range or even Auto Range with the Navigation Enter keys Once a range 1s selected the instrument returns to the main screen While in Range Configuration screen the user may cancel the selection by hitting the ESC key 45
82. ence Value Define Syntax PM REF VALue val Parameters 102 8 3 3 66 8 3 3 67 8 3 3 68 Communication Command Reference 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 number Related Commands PM REF STOre PM REF VALue 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 UNITS PM PWS 8 3 3 69 8 3 3 70 8 3
83. enience to take a look at the signal frequency as needed just by pressing a key By doing so the user does not need to change the current optical power measurement in progress just to know what the repetition rate is Moreover as explained in Section 4 7 when using the Statistics screen the user has an instant view of the input signal regarding Frequency instant measured value Minimum Maximum Mean Standard Deviation Signal Range The 1936 2936 Optical Meters have the capability of measuring the modulation frequency or repetition rate of the incoming optical signal with frequencies as low as 0 5 Hz on most ranges and up to 200 kHz Below 0 5 Hz the measurement error will increase and in some cases the measurement will freeze Frequencies below 0 5 Hz cannot be measured Refer to the Specifications table Section 2 6 for the actual frequency limits depending on range and mode of operation In order to perform an accurate frequency measurement the AC signal amplitude must be higher than 5 of the full scale of the range the meter is set on For example 1f the DC value of the incoming signal is 1 25 and the modulating AC signal amplitude is 50 mV the frequency measurement error might increase or the measurement might freeze This 1s due to the fact that for a DC signal of 1 25 V the meter sets the range at 2 5 V and the AC amplitude of 50 mV is 2 of the full scale range of 2 5 V The frequency measurement is based on the t
84. etector Model 318D SL OD3 ate In addition the attache Detector S N 10095 detectors data 15 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 Detector Cal Date __ Oct 17 2006 back to the System Settings E Measure 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 6 Stop Bits Parity None Xon Xoff Xoff Statistics The 1936 2936 Series can display Statistics statistics for the measurement in ixed Meas 39 75 yw progress From the main screen Rate 1 Max 39 977 uw press the Soft key labeled I Polis 2 Range 0 1042 pw Statistics The Statistics screen is Mean 39 928 uw displayed as in Figure 46 Std Dev 0 0216 The left column shows the UE statistics current setup The Hint Press Clear Stats to clear and start statistics Statistics function has two modes Graph Save ClearStas 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 num
85. ets the echo on or off 83 NONE Returns the status of echo 84 NONE Returns errors generated since the last query 84 NONE Returns errors and their corresponding error text generated since the last 84 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 FILTer PM FREQuency PM Lambda PM Lambda PM MAX Lambda PM MAX Power PM MIN Lambda PM MIN Power PM MEAS TIMEOUT PM MEAS TIMEOUT Number of Parameters 1 1 1 NONE 1 NONE 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 to desired value Returns the analog filter setting Sets the analog output impedance to desired value Returns the analog output impedance value Sets the analog output rang
86. ffected 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 9 10 3 9 10 4 9 10 5 Principles of Operation 121 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 Cooling a detector significantly lowers its dark current 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 1936 2936 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 vi
87. grammable low pass filer The user can select the following settings 5 Hz 1 kHz 12 5 kHz and 250 kHz This flexibility 15 offered 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 800 Hz the user may choose to set the Analog filter to 1 kHz to increase the SNR and be able to measure very small signals Also cutting the bandwidth at 1 kHz does not affect the measurement However if the modulation frequency 1s 800 Hz but the signal 1s a square the user may opt to cut the bandwidth higher at 12 5 kHz to let the signal harmonics be unfiltered and minimize the distortion Of course in this case the noise the system will increase with the square root of the bandwidth The user needs to asses the tradeoffs 1n his measurement taking advantage of the 1936 2936 Series high flexibility in setting the proper filters for the measurement 9 11 Principles of Operation 123 Generally the 5 Hz filter is used for CW Co
88. graph 4 1 6 Also the analog output signal 1s amplified and scaled to the selected analog output level see Table 5 The user can select the analog output level with a command PM ANALOG OUT see Section 8 3 The analog output maximum level corresponds to the maximum full scale input range the meter 1s set on For example if one selects the analog output level at 0 5 V into 50 O 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 input impedance and the user reads 0 25 V the detector power is 125 mW The selectable analog output levels are given in Table 5 Output Range Odfau 1 2 3 Full Scale Voltage Load gt 100 kQ 1V 2 5 10V Full Scale Voltage Load 50 Q 0 5V 1V 2 5 120 9 10 9 10 1 9 10 2 Principles of Operation Table 5 Analog Output Range Table 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
89. he 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 Figure 22 Navigation Selection and Setup Enter keys Mode CW Cont Range Auto 400 nm _ 40 46 Hint Press left right arrow key to switch channels Figure 23 Main screen 4 1 3 4 1 4 4 1 4 1 System Operation 43 Measurement Settings Wavelength 670 Detector 818P 001 12 Range 0 113 Sun S N 173952 Range type Auto Det temp Therm Attenuator Off Responsivity 1 959 1 Analog filter Ref val 0 0010 Sun Digital filter 1 Offset 0 0000 Sun Units Mode CW Cont oystem 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 20 and Figure 22 Left and Right keys have dual functionality Channel Swapping
90. icense 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 the SOFTWARE including the U S Export Administration Regulations as well as end user end
91. icrosoft 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 144 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 provided to you by MS Microsoft Corporation or their subsidiaries then you will be licensed by such
92. igure 55 shows the red bar in the Analog Bar is very small so with the Analog Zoom this bar 15 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 60 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 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 0 704 uw T d C Ww 400 40 34 0 0 54 99 pw 109
93. ion Trigger STOP Query Syntax PM TRIG STOP Parameters None Function 8 3 3 89 8 3 3 90 8 3 3 91 Communication Command Reference 109 This query returns the TRIGGER STOP condition Related Commands PM TRIG STOP PM TRIG STATE Description This command sets the trigger state Syntax PM TRIG STATE lt option gt Parameters The parameter option is of type lt number gt and is an integer 0 or 1 Argument Value Description option 0 Trigger 1s armed The system waits for a trigger start event to occur order to make a measurement 1 System 15 triggered and at least measurement occurred Related Commands PM TRIG STATE PM TRIG STATE Description Trigger STATE Query Syntax PM TRIG STATE Parameters None Function This query returns the TRIGGER STATE condition Related Commands PM TRIG STATE 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 15 of type lt number gt Argument Value Description value float Measurement level Related Commands PM TRIG STOP 110 8 3 3 92 8 3 3 93 8 3 3 94 8 3 3 95 Communication Command Reference PM TRIG VALUE Description This command return
94. 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 15 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 1f the external trigger is defined as a falling edge or 1 1f the external trigger is defined as a rising edge 8 3 3 83 8 3 3 84 8 3 3 85 Communication Command Reference 107 Related Commands EXT PM TRIG EXTernal PM TRIG EXTernal PM TRIG EDGE PM TRIG HOLDoff Description External Trigger Holdoff Time Command Syntax PM TRIG HOLDoff lt time gt Parameters The parameter lt time gt is of type lt number gt and 15 an integer from 0 to 1000 lt time gt 15 the delay in milliseconds for the trigger to take effect Function This command sets the delay interval before the trigger takes effect Related Commands PM TRIG EXTernal PM TRIG EXTernal PM TRIG HOLDoff 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 TR
95. ithin 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 1s 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 Before connecting the instrument to the USB interface the user should install the application included in the software CD that accompanies the Optical Meter The application automatically installs the right USB drivers 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 76 Computer Interfacing This page is intentionally left blank 8 1 8 2 Communication Command Reference Model 1936 2936 Series Remote Interface Commands A complete listing of the commands supported by 1936 2936 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
96. its query Syntax PM DS UNITS Remarks The PM DS UNITS query returns an integer indicating the units selected 96 8 3 3 48 8 3 3 49 8 3 3 50 Communication Command Reference Response Value units 0 1 2 3 4 5 6 7 10 11 Description Amps Volts Watts Watts cm Joules Joules cm dBm Reserved Sun Related Commands PM UNITS PM UNITS Description Filter select command Syntax PM FILT filter type Remarks The PM FILT command select the filtering operation to be performed on power readings Argument Value Description Filter type 0 No filtering 1 Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT Filter type query The PM FILT query returns an integer indicating the present filter mode Description Syntax PM FILT Remarks Response Value Filter type 0 1 2 3 Description No filtering Analog filter Digital filter Analog and Digital filter Related Commands PM FILT PM FREQuency Description Measured frequency query 8 3 3 51 8 3 3 52 8 3 3 53 Communication Command Reference 97 Syntax Remarks PM Lambda Description Syntax Remarks Argument Value PM FREQuency The PM FREQuency query returns a value indicating the present measured frequency Hertz Wavelength set command PM Lambda value The PM Lambda command selects the wavelength to use when calculating power The va
97. lue 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 PM Lambda Description Wavelength query Syntax PM Lambda Remarks The PM Lambd2 query returns the selected wavelength Response Wavelength in nanometers This 1s 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 PM MAX Lambda Description Syntax Remarks Response Wavelength Maximum wavelength query PM MAX Lambda The PM MAX Lambda query returns the longest calibrated wavelength in nanometers If no detector 1s preset the max lambda for the last read detector 1s returned Type Description int Wavelength in nanometers nm Related Commands PM MIN Lambda 98 8 3 3 54 8 3 3 55 8 3 3 56 8 3 3 57 Communication Command Reference 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 PM MIN Lambda Description Syntax Remarks Response Wavelength Minimum wavelength query PM MIN Lambda The PM MIN Lambda query returns the shortest calibrated wavelength in nanometers If no detector 1s preset min
98. measurement screen The Correction Settings screen Measurement Settings Figure 51 allows users to enter Detector 818 001 12 two 2 multiplier values labeled ec NR E et temp Multiplier l M1 and Attenuator 1 Responsivity Multiplier 2 M2 besides an Analog filter Ref val Offset value The corrected wc ani Units Num Digits measurement is arrived at using the Bootes 1 1310 cm formula shown below Corrected measurement Actual ystem Trigger Correction 1 measurement M1 Offset M2 Figure 50 Measurement Settings Note that these settings are channel Correction Settings specific and apply to the primary Result Detector 1 Offset 2 channel viewed on the main Multiplier 1 1 0000 measurement screen Offset 0 0000 W The default value for the two Multiplier 2 1 0000 multipliers is 1 0 and the offset 15 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 58 4 10 4 10 1 4 10 2 System Operation Display Modes The selection of various display modes 272027 Display Mode a be done from the default screen 22201 a e CW Single Min Max bar by pressing the Mode soft key When C
99. med inside the power meter by persons not authorized by Newport may void the warranty 3 3 3 system Overview 37 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 1936 2936 C Series can operate at 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 1936 2936 Series voltage setting 1 Ensure that the 1936 2936 Series 15 turned OFF and disconnected from the AC power source 2 Disconnect the power cord from the AC power input connector on the back of the 1936 2936 Series 3 Using a small screwdriver insert and press down into the notch at the top of the power entry module to pry the door open 4 Carefully remove the voltage selector drum 5 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 change the fuses according to the procedure found in Section 10 2 Replacing Fuses CAUTION Match the voltage se
100. mits a significant amount of infrared radiation and radiates a temperature significantly different from ambient With the detector covered a reading of 122 9 10 6 Principles of Operation the dark current may be made Next remove the material that is 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 Signal Filtering The 1936 2936 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 hardware based pro
101. n he 0706 40 nm EJ of Hint Pre s left right imm d Green screen e Blue screen f Color Blue screen Figure 42 Predefined color schemes To change the display colors first Measurement Settings press the Enter Setup key This will Wavelength 670 Detector 818P 001 12 bring the Setup screen and a 0 113 funi ange type 0 Det temp Therm reconfigure the Soft keys Figure 43 Attenuator M Responsivity 1 959 1 Analog filter Ref val 0 0010 Sun Digital filter 1 Offset 0 0000 Sun Units Num Digits 5 Mode CW Cont Spot size 1 1310 cm Trigger Correction Figure 43 Setup screen Pressing the System soft key will system Settings bring a secondary setup screen Navigate to the Color Selection to RS232 Parameters change the screen color Figure 44 ae Also navigate to the Brightness field and hit Enter to change the screen brightness The default value is 80 Press the Measure soft key to go back to the Measurement Settings i screen or press ESC to go back to the main screen Figure 44 System Settings screen 54 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 2008 information about the unit Firmware Instrument S N P1001 Instrument Cal Date 19 2008 version serial number calibration a d I den h kea D
102. nal sampling rate of 250 kHz e Multiple measurement modes for power and energy measurements Single Continuous Integrated Peak to Peak and Frequency e Software suite including LabVIEW drivers and Windows application e 250 000 internal data point storage e Triggering features to synchronize measurements with external events e USB and RS 232 Interfaces e 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 Watts Joules Amps Volts Hertz dBm dB Sun 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 1936 2936 Series power meters enable users to benefit from high correlation between multiple 26 2 2 2 3 2 4 2 5 2 6 2 6 1 General Information locations at a price to performance rati
103. nded that the Models 1936 2936 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 2 8 Inspection for Damage The Models 1936 2936 Series Optical Power Meters are carefully 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 30 2 9 2 10 2 11 2 12 General Information 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 1936 2936 Series Optical Power Meters User s Manual Hardcopy or CD Software Drivers
104. nfiguration screen screen after the Enter key was pressed A sample list of operators is shown in adjacent figure please review this screen on your power meter for the actual choice of operators available H Store Ref Ret 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 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 returns to the default screen and the Math field disappears 4 9 System Operation 57 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
105. nt 2 lt number gt defined as binary 3 lt number gt defined as octal 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 SPACE gt Any non valid characters detected 1 any number received are considered error in format and an error condition will be generated in the system A description of each type of lt number gt follows 1 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 followed by a or optional followed by decimal digits Examples The numbers below all represent the value 1 2 1 2 1 2 0 01 2E 00000 120E 2 12el The numbers below all represent the value 1 2 1 2
106. nt measurements However the 1936 2936 Series can measure the amplitude of AC signals down to 0 01 Hz so the 5 Hz filter can be used for any modulating signal below 5 Hz The Digital 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 1s 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 is 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 1s filtered between the displayed values and the Analog Output values When the system performs frequency measurements the analog filter 1s ignored Common Measurement Errors The most common sources of optical measurement error are listed in Table 6 below Other common errors are discussed in the preceding subsections of Measur
107. nter 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 1s in the default screen and Zero 1s 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 1f the detector has an internal temperature sensor and the detector responsivity Responsivity 4 3 4 3 1 4 3 2 System Operation 51 Trigger Setup The Trigger Setup screen can be Measurement Settings accessed from the Measurement Detector 818 001 12 Settings Figure 40 Pressing the T Trigger soft key gives the user a few i Reeponsivity choices to setup the trigger according to the measurement needs Digital filter Units Mode The user has the option to send a 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 The 1936 2936 Series has an advanced
108. o obtain the proper power or signal readings Peak to Peak Power Measurements 918D Detectors 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 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 66 5 6 Performing Basic 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 on setting the reference values For dual detectors you can obtain a live ratio or other comparison of the two channels displayed 1 Use soft key labeled Math to enter the math function screen 2 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 to select dB ratio of channel A to channel 1 While in the Ma
109. o second to none Among all the other practical tools provided remote controlling with a computer and synchronization to other instruments are simplified with the 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 a Full Speed USB interface 11 Mbps Optical Meter Functionality Optical meters the 1936 2936 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 They require detectors having a 15 pin D Sub type Male connector Model 1936 C The model 1936 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 Model 2936 C The model 2936 C optical meter 1s 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 Calibration Calibration of the power meter 1s done at the factory by defining a slope and offset for all ranges as determined for each detector type Newport re
110. o the File menu and select Exit The Edit Advanced Options menu has additional property settings including channel settings and data logging options The Help About will show information about the application including firmware version when an instrument is connected and communicating 7 1 7 2 7 2 1 7 2 2 7 2 3 7 2 4 Computer Interfacing General Guidelines The 1936 2936 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 1s recommended that when a query command i1s 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
111. oat Detector temperature in degrees Celsius C Related Commands PM ATT PM TRIG EXTernal Description Syntax Parameters External Trigger Enable PM TRIG EXTernal lt enable gt 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 then the external trigger is enabled on channel A If lt state gt 1s 2 then the external trigger is enabled on channel If lt state gt is 3 then the external trigger is enabled on both channels Function This command enables or disables the external trigger input on the back panel Related Commands PM TRIG EXTernal 106 8 3 3 80 8 3 3 81 8 3 3 82 Communication Command Reference PM TRIG EXTernal Description External Trigger Enable Query Syntax PM TRIG EXTernal Parameters None Function This query returns a value showing whether the external trigger input 15 enabled or disabled Returns lt state gt lt state gt is of type lt number gt that represents the integer the external trigger input 1 disabled If lt state gt 1s 1 2 or 3 the external trigger 1s enabled on channel A channel B or both respectively Related Commands PM TRIG EXTernal 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 15 defined as a falling edge If lt edge gt
112. ons 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 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 WARRANTY AGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR AGAINST INFRI
113. ource The displayed value should now reflect the detector signal integration 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 Measuring Laser Pulse Energy with an 818P Thermopile Detector Single Shot This application makes use of the 1936 2936 Series CW Integrate mode see Section 5 7 above When an optical pulse with energy E A 1s incident on a thermopile 818P Series a voltage signal 1s generated at the detector input as the heat pulse flows out to the cooling fins The sum of a series of integrated signals each one second long resulting from this heat pulse 1s a measure of the optical pulse energy see Figure 59 68 Performing Basic Measurements Input Optical Pulse Energy Z A F A Resultant Voltage Vi Pulse from Thermopile Integrate Voltage to find A 0 vo a Figure 59 Measuring Laser Pulse Energy via a Thermopile in CW Integrate Mode A recommended procedure 1s With an 818P High Power Detector connected to the meter turn the meter on set the Mode to CW Continuous Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Set Zero on and then change Mode to CW Integrate Before the optical pulse arrives the display may reflect the integral of detector noise due to ambient temperature fluctuations Trigger the laser pulse
114. ove 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 179 Deere Avenue Irvine CA 92606 USA Part No 90021116 rev B Firmware version 1 0 6 Preface Confidentiality amp Proprietary Rights Reservation of Title The Newport programs and all materials furnished or produced in connection with them Related Materials contain trade secrets of Newport and are for use only in the manner expressly permitted Newport claims and reserves all
115. p 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 External Trigger TTL Signal The measurement stops when an external TTL signal is connected to the Trigger In BNC The edge choice 1 set with an external command PM TRIG EDGE Section 8 3 3 Soft Key The system stops measuring when a Soft Key is pressed This key appears on the main screen Command The system stops measuring when an external command PM TRIG STOP Section 8 3 3 is sent via USB or RS232 Value The system stops measuring when the measured signal crosses a user programmed value Time The system stops measuring when a user programmed time passed between the Start event and the current measurement 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 also 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 47 The screen has two columns The left column displays the common wavelength values used the industry while
116. peak measured from immediately before the sharp rise 1 0 0 8 VOLIS V peak NON NU NENEN 0 2 4 0 6 0 5 1 0 TIME sec Figure 66 Negative Baseline Voltage Negative Baseline Voltage Due to a Pulse Trainshown If a laser pulse arrives before the previous Energy detector signal has fully decayed the detector signal rises from the present decay point of the previous signal Peak to Peak Photodiode Detector Signals The 1936 2936 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 measurement the 1936 2936 Series must be able to capture both the maximum and minimum values of a detector signal This is accomplished by sampling 118 Principles of Operation K AVERAGE AC FEAR TOLPEAR IK AC Figure 67 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 8 Integration of Detector Signals The 1936 2936 Series provides for making measurements that integrate incoming power detector signals to obtain an energy via the CW Integrate mode In CW Integrate mode the display units indicate Joules since energy is
117. previous measurements Besides the maximum value being displayed with a red bar the actual value is displayed above the bar graph where 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 1s 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 above 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 Analog 0 697 uw adjust a maximum or a minimum the 1936 2936 offer the Auto Zoom function When the Auto Zoom soft key 15 pressed another bar appears above the Analog Bar The bar length is 2 of the Analog Bar It is a display of the region around the end of the M REC analo g bar ni dl up a ow key to switch channels Reset m M Auto Zoom Show Mir 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 1 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 F
118. r 1s 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 read Output buffer 1s 4 096 characters long 305 Parser Buffer Overflow Error generated when the system parser runs out of space for commands A command 1 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 15 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 ch
119. r Family Resp Units Mode Amplifier Peak Path Baseline High Power Integral Table 4 Analog Signal Flow Paths ee C 9 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 1s discussed further Digital Filter If the digital filter annunciator Dig or Digital 1s on Section 2 3 4 the filter output 1s the average of the most recent 10 100 1000 10000 samples The number of samples 15 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 1 reset when the Model 1936 2936 is 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 account
120. ransitions the system sees in the input signal If there 1s high noise in the input signal the measurement might be inadvertently affected because the noise transitions would appear as being valid transitions Also as the input signal transitions become softer 1 e the modulation signal 15 not a square but a sine wave as the frequency decreases below 50 Hz the system might consider that the input signal 1s DC and the measurement stops The frequency measurement is always available and a value is displayed at all times independent of the Mode This being the case it 1 up to the user to assess whether the frequency measurement makes sense or not for that particular measurement For example in CW Continuous Mode with the 5 Hz filter on the AC signal will be negligible However the meter might see some small transitions coming from noise and will display a value for the frequency Obviously this displayed value should be ignored for this case Below the specified minimum frequency value the measurement might skip or even freeze This is normal because the input signal approaches a frequency that can be perceived as DC by the system 70 5 10 Performing Basic Measurements RMS Measurements This section describes the procedure for making a basic signal RMS Root Mean Square measurement while properly removing the influence of ambient light and other drift effects The 1936 2936 Series begins and ends the signal RMS every s
121. rection 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 15 calculated using the formula provided below Corrected Measurement Actual Measurement 1 value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower 90 8 3 3 28 8 3 3 29 8 3 3 30 8 3 3 31 Communication Command Reference PM CORR Description Syntax Remarks Response value 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 default 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 Area PM DETSN Description Syntax Detector model query PM DETMODEL The
122. 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 interval Parameters The parameter lt interval gt is of type lt number gt that is an integer The parameter represents the rate at which measurements are put in the data buffer Function An interval value of 1 causes the power meter to put all measurements taken in the data store buffer a value of 2 causes every other measurement to be put in the data buffer and so on If the measurement mode is CW Continuous an interval setting of 1 translates to putting measurements at the rate of 0 1ms in the data buffer If the measurement mode 15 Peak Peak Continuous an interval setting of 1 translates to putting measurements at a rate dictated by measurement timeout duration Refer PM MEAS TIMEOUT command for details If the measurement mode is Pulse Continuous an interval setting of 1 translates to putting every pulse measurement in the data buffer Here the rate of data storage depends upon the pulse repetition rate The total time taken to fill up the data buffer depends upon various factors such as the interval data store size and measurement mode 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
123. rights and benefits afforded under law in the Programs provided by Newport Corporation Newport shall retain full ownership of Intellectual Property Rights 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 Information This section contains information regarding factory service for the source The user should not attempt
124. roller Serial Model Firmware Firmware name version date NECS PORE UE NEWPORT XXXX vYYY mm dd yy SNZZZZ Examples NEWPORT 1936 C v1 0 0 12 12 05 530001 NEWPORT 2936 C v1 0 0 12 12 05 530001 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 82 8 3 3 3 8 3 3 4 8 3 3 5 Communication Command Reference SAV Description Syntax Remarks Argument bin Save Configuration Settings SAYV bin The SAV command saves the present state of the power meter in its non volatile flash memory A particular state 1s then recalled using the RCL command If any one of these parameters 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 meter defaults to configuration setting 1 The setup parameters saved include Display brightness level USB address Color scheme Measurement display mode Custom wavelengths Value Description 0 Reserved 105 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 addre
125. rs 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 1936 C and 2936 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 A Trigger input offers the possibility of synchronizing the power meter measurements with external events 3 3 2 System Overview 35 Output Connectors Power meters in the 1936 2936 C series support one analog output 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 Figure 15 e 15 Pin D Sub Optical Detector Input Channel A 1936 C 2936 C e BNC Analog Output Channel A 1936 C 2936 C e BNC Trigger Output Channel A 1936 C 2936 C e 5 Pin D Sub Optical Detector Input Channel 2936 C e BNC Analog Output Channel B 2936 C e BNC Trigger Output Channel B 2936 C e Trigger Input e Universal Serial Bus Device e O Pin D Sub RS 232 CAUTION DO NOT REMOVE COVER REFER SER
126. s Single m Table 1 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 with 918D or 818P Detectors This section describes the procedure for making basic optical power measurements while properly removing the influence of ambient light and other drift effects With a 918D also 818 XX low power detectors with proper adapters or 818P Series Detector 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 5 4 5 5 Performing Basic Measurements 65 This process assumes that the ambient signal 1s not changing between the time when the Zero key is pressed and when the measurement is made The user should remember that if he she c
127. s for the signal gain of the input amplifiers The output 1s the product of the digitized value and the amplifier gain 9 4 Principles of Operation 115 Zero Offset Zero offset 15 active whenever the Offset annunciator is lit The zero offset output 15 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 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 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 15 not adjusted Otherwise the digitized value 1 adjusted to account for detector 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 detec
128. s the measurement level that indicates a trigger stop condition Syntax PM TRIG VALUE Parameters None Related Commands PM TRIG STOP PM TRIG TIME Description This command sets the time duration that indicates a trigger stop condition The power meter will stop taking further measurements if 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 value 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 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 1 Volts 2 Watts 3 Watts cm 4 Joules 5 8 3 3 96 8 3 3 97 8 3 3 98 Communication Command Reference 111 6 dBm 7 10 Reserved 11 Sun 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 units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules cm 6 dBm 7 10 Reserved 11 Sun Related Commands PM UNITS PM ZEROSTOre Description
129. sible 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 e Your Contact Information e Serial number or original order number e Description of problem 1 e hardware or software To help our Technical Support Representatives diagnose your problem please note the following conditions e 5 the system used for manufacturing or research and development e What was the state of the system right before the problem e Have you seen this problem before If so how often e Can the system continue to operate with this problem Or is the system non operational e Can you identify anything that was different before this problem occurred 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 1936 2936 Series USB drivers Preface Table of Contents EU Declaration of Conformity 3 VV SL 5 Technical Support C onta iS solent etn ades inp Re EAT 7 9 Cd 16 ET 17 1 Safety Precautions 19
130. ss the communication with the power meter has to be re initialized Value Description 0 Reserved l to 51 Valid USB address range Related Commands ADDRess ADDRess Description USB address query 8 3 3 6 8 3 3 7 8 3 3 8 Communication Command Reference 83 Syntax ADDRess Remarks The ADDRess query returns the power meter s USB address Response Value Description address 0 Reserved l to 31 Valid USB address range Related Commands ADDRess 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 1 Enable beeper 2 Beep for 100 ms Note The beeper is enabled at power on Related Commands BEEP 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 1 Beeper enabled Related Commands BEEP ECHO Description Echo command Syntax ECHO echo set Remarks The ECHO command is used to turn 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 84 8 3 3 9 8 3 3 10 8 3 3 11 Communication Command Reference echo set 0 Echo OFF 1 Related Commands ECHO ECHO Description Echo
131. t values the power measurement returned by this command is same as the measurement returned by PM P command Type Description float Power in Watts Related Commands PM Power 92 8 3 3 35 8 3 3 36 8 3 3 37 8 3 3 38 Communication Command Reference PM DS BUFfer Description Data Store buffer behavior selection Syntax PM DS BUFfer behavior Remarks The PM DS BUF fer command selects the behavior mode for control of the Data Store buffer Argument Value Description Mode 0 Fixed Size 1 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 Description none PM DS Count Description Data Store data item count query Syntax PM DS Count Remarks The PM DS Count query returns the number of measurements that have been collected in the Data Store 8 3 3 39 8 3 3 40 8 3 3 41 Communi
132. th function screen select channel by using the up down arrow keys There will remain a black border around the highlighted selected channel as you leave the column for the next selection 2 Move to the next column by using the right arrow key and select option 3 Move to the last column by using the right arrow key and use the up or down keys to select channel B 4 Press the Menu Enter key to accept the selections and exit the Math function screen 5 The result of A B in units of dB will appear in the designated window on the screen Example 2 In order to get the difference between channels A and B 1 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 2 Use the direction keys to highlight channel A in the first column 3 Using the direction keys navigate to the sign in the center column 4 Using the direction key move the final column such that Ch B is highlighted 5 Press the Menu Enter key to retain the settings and exit the screen at the same time 6 The result of A B will be displayed in the designated window of the main display screen Pulse Energy Measurements 818E Detectors This section describes the procedure for making basic optical pulse energy measurements With an 818E Energy Detector connected to the meter turn the meter on Set the Mode to Puls
133. 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 three categories CW Peak to Peak Pk Pk and Pulsed Each will be discussed in the sections below The 1936 2936 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 1936 2936 Series are covered in the following sections Refer to Table 1 for a review of the 1936 2936 s functions and measurement capabilities 64 5 3 Performing Basic Measurements Detector Family gt CW CW Single Low N Power Integrate Pk Pk e 8D Continuous eries Pk Pk Single W W X rar gt lt High a Power CW Single X C 818P Series Integrate X X Pulse Energy Continuous X X X X X gt lt dliel e PE tt e gt lt gt lt gt lt 818 Pulse Serie
134. the previous zoom value Pressing the Zoom soft key will zoom out 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 direct 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 56 4 8 System Operation Math Functions The Math function is displayed on Analog the math field at the upper right Wade CW Cani side just below the secondary Range 110 0 uW 40 725 ww channel field Figure 48 To 400 nm display the Math field the user x selects the soft key labeled Math in 4 0 2 the main screen This in turn displays math configuration screen Hint Press left right arrow key to switch channels Statistic Math The Math function can be used to add subtract multiply or divide channels A and B in real time Figure 48 Math field Math Function Setup 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 co
135. the time integral of power Es P A dt As the detector signal actually consists of a stream of digitized values the integral becomes a numerical approximation using the trapezoid method See Figure 68 Detector Signal Numerical Integration Trapezoid Method Magnitude of the Integrated Result Figure 68 Integrated Energy Via a Trapezoid Approximation The INTG measurement mode performs a discrete integration at a 400 Hz sample rate 9 9 Principles of Operation 119 Two common applications are natural extensions of the CW Integrate measurement mode Pulse laser energy measurement using a thermopile detector Energy from exposure over a period of time dosage E A Input Optical Signal Vit Detector s Voltage Pulse EQ vo It K A Displayed Signal Figure 69 Measuring Laser Pulse Energy with a Thermopile Thermopiles are often used to measure pulsed laser energy by integrating the response of the detector to the pulse Analog Output The Model 1936 2936 Series provides an analog output for signal monitoring The analog output is the actual amplified detector signal and 1s 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 para
136. 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 1936 2936 C series power meters The command query MUST contain all of the letters which are shown upper case 1 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 the order they are received and execute them sequentially If a set of commands have to be executed closer to each other 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 78 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
137. tion 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 At the bottom of the same column the system displays the primary channel signal frequency Section 5 9 gives a more in depth description of the Frequency measurement This screen also provides users access to all the samples collected if statistics are performed in Fixed mode In this mode a Save soft key becomes visible not shown in figure above after all the samples requested have been collected Pressing this soft key will cause the power meter to save the collected data to a flash drive connected the front panel of power meter Graph The Graph soft key displays the last 37 360 UW Zoom 1 Val 21 637 UW 10000 measurements on a time graph n 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 Time 0 50005 ino number of pixels Therefore the a graph might look choppy if the graph Fem 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
138. tion of number qune tts Appendix Error Messages VM I12 2 Command BEEOES 12 5 BXecuttot BETOES I2 4 NOC Vie Cx PROT Appendix C Legacy Commands Reference Appendix D Sample Programs 14 1 Programming Samples eese a eene Ve Lee WV coset oR gaa teeta rotting ntum Su ian cbe EE se 14 3 Microsoft Visual Basic eeeee 14 4 Microsoft Visual ececccccscccsscccssccessccssccescecseceucs t49 Microso t NET au iet A Appendix E Disassembly Instructions 15 1 Disassembly Preface List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 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 General Warning or Caution Symbol sess 19 Ficetrical Shock suoni indo DIEI REIR 19 Protective Conductor Terminal 1 19 CE Ma qe 20 Alternating Voltage 20 Sy AAO MT 20 SMO L e S 20
139. tions Cable terminators 75 Figure 63 Model 1936 2936 Series Analog Signal Flow Diagram 113 Figure 64 Thermopile Signals exhibit 1 to 10 second time constants 116 Figure 65 Typical Newport Energy Detector Signal Waveform 117 Figure 66 INegative Baseline ce eames Figure 67 Time Varying Signal Measurements sse 118 Figure 68 Integrated Energy Via a Trapezoid Approximation 118 Figure 69 Measuring Laser Pulse Energy with a Thermopile 119 Figure 70 Fuse Replico ib ait a ied tutu n idet un ashes 125 Figure 71 Disassembled 1936 2936 model 142 List of Tables Table 1 Available Measurement Modes and Valid Units 64 Table 2 Root level Commands Queries 5 78 Table 3 Tree Level Commands Queries 80 4 Analog Signal Flow 114 Table 5 Analog Output Range Table 120 Table 6 Common Measurement EOTS 123 Table 7 Legacy Commands Reference oos v ag on DRUG 138 18 Preface This page is intentionally left blank 1 1 1 1 1 1 1 2 1 1 3 Safety Precautions Definitions and Symbols The following
140. tions in the service instructions or on the equipment Only qualified service personnel should replace fuses Safety Precautions 23 e To avoid explosion do not operate this equipment in an explosive atmosphere e 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 41189 01 Figure 12 AC Receptacle Warning Label e 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 e Use only the specified replacement parts e Follow precautions for static sensitive devices when handling this equipment e This product should only be powered as described in the manual e There are no user serviceable parts inside the
141. tor 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 1936 2936 Series analog signal flow 1s required in order that it 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 P or E R Where R Detector responsivity at A S Detector signal Semiconductor 918D 818 Series Low Power detectors provide a current signal The 1936 2936 Series is capable of 1 resolution in order to provide the highest sensitivity performance with these detectors 116 9 5 9 6 Principles of Operation Thermopile 818P Series High Power detectors provide a small voltage signal The 1936 2936 is capable of 76 3nV resolution in order to reach the sensitivity limits of thermopile detectors Pyroelectric 818E Series Energy detectors deliver a peak voltage signal The1936 2936 is capable of capturing 2 usec rise time voltage spikes so that it may be operated with the fastest of these detectors Thermopile Detector Signals Thermopile detectors respond with a voltage signal that slowly changes in incident optical power The time constant of most thermopile detectors is on the order of 1 to 10 seconds Input Optical Signal
142. ts human health and the environment For information about where the user 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 Heed all warnings on the unit and in the operating instructions Do not use this equipment in or near water 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 loca
143. tting to fuse sizing Failure to do so may result in damage to the power meter Do not exceed 250VAC on the line input 8 Close the power entry module 9 Verify the correct voltage 1s displayed through the voltage window 10 Connect the AC power input cord to the AC power input connector on the back of the 1936 2936 Series 38 system Overview 3 4 Rack Mounting the 1936 2936 Series Newport Corporation offers two rack mounting kits for the 1936 2936 Series PMI RACK Figure 17 and PM2 RACK Figure 18 The PMI RACK can house one unit from the 1936 2936 Series In the PM2 RACK two units either Model 1936 or Model 2936 or one of each may be mounted side by side PMI RACK and PM2 RACK kits will only fit into 19 EIA style racks 19 00 2A 24 18 51 4X 9 268 HOLES al 5 39 02 7 53 Figure 17 RACK mounting kit System Overview 39 19 00 2X 3 2 18 5 TX gd 266 HOLES 5 94 02 3 20 1 92 AG 17 252 Figure I8 2 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 1s 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 40 System Overview 4 RACK DRESS MUT i 4X 8 32 x 1 2 M F
144. tus word Type Description exp Power in present units for channel 1 int A bitfield in hexadecimal defining the current channel status 8 3 3 63 8 3 3 64 8 3 3 65 Communication Command Reference 101 Power reading 2 exp Power in present units channel 2 if present 0 0 otherwise Status 2 int A bitfield in hexadecimal defining the current channel status NOTE The bitfield is defined as follows Bits 9 7 Channel Units See PM UNITS Bits 6 4 Channel Range See PM RANge Bit 3 Detector Present Bit 2 Channel range change status Indicates if a measurement has been taken while the unit is ranging Bit 1 Detector Saturated reserved follows bit 0 Bit 0 Channel overrange Indicates that the current measurement is overrange for the current channel range Related Commands PM MODE PM RANge Description Range select Syntax PM RANge range Remarks 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 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 Refer
145. 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 NNevvport Visit Newport Online at www newport com
146. 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 7 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 SIMEAN n STMIN n SIMXMN 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 A zip file in the application folder contains a simple NET project for communicating with the meter 140 Appendix D This page is intentionally left blank 15 15 1 Appendix E Disassembly Instructions NOTE These disassem
147. w 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 this operator manual As required Newport will also generate a new version of this user manual reflecting updates to the instrument Please check the Newport website www Newport com for newer versions of the firmware and the operator manual which can be downloaded as a PDF file 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 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 remainder of the original warranty period or 90 days whichever first occurs Limitation of Warranty The ab
148. 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 NOTE Only use a WinCE compatible USB Flash Drive when connecting to USB connector on instrument front panel Press the lt SETUP ENTER gt key and then Softkeys lt SYSTEM gt and lt ABOUT gt to verify that the power meter is running the appropriate firmware version For example the firmware version for the 1931 C could be 2 0 10 and firmware for the 1936 C could be 1 0 5 Note that these versions may not be the latest at the time you are performing a firmware upgrade 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 62 System Operation This page is intentionally left blank 5 1 5 2 Performing Basic Measurements Introduction Many different types of optical measurements are possible using the 1936 2936 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 1936 2936 provides a number of measurement modes for acquiring data At power on the meter checks

Model 1936/2936-C Series - UCSD Department of Physics

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