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QC User`s Manual - Audiomatica Srl

1. 9 Ohm 1 This example details the quality control procedure that Audiomatica uses to test its production of CLIOQC Amplifier 4 Switchbox A precision 5 Ohm 10W 1 resistor is needed and must be connected across DUT terminals The procedure executed in Interactive mode guides the operator and requests the manual connection of the unit the cable coming from output B of CLIO must be swapped during the test between input 1 and 2 The test begins with two impedance measurements the first executed in ISense Mode the second executed in Internal Mode Then a THD measurement with FFT and finally the frequency response of each input channel are performed Note the keywords used to alternatively mute CLIO s output GLOBALS COMPANY AUDIOMATICA S R L FLORENCE TITLE 0EBOX TEST PROCEDURE INTERACTIVE 1 PROMPT ME SSAGE CONNECT MESSAGE2 OUTA gt FROM CLIO INA gt TO CLIO OUTB gt CH1 INB gt ISENSE PROMPT MESSAGE PLACE 5 OHM 1 RESISTOR ACROSS D U T TERMINALS SETIMPEDANCE SETMUTEB PERFORM DELAY 500 SEN 76 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE OUT 0 IN 20 REFERENCE IMPEDANCE SINI LIMITS IMPEDANCE LIM LoS BEE ENeUTl PERFORM DELAY 500 LSIN OUT 10 IN 20 REFERENCE ISENSE SINI LIMITS IMPEDANCE LIM FET OUT 10 0 IN 10 ACQUISITIONDELAY 200 REFERENCE FFT FFT LIMITS FFT LIM RESETMUTEB SETMUTEA PERFORM DELAY 500 SIN OUT 10 IN
2. CTRL X Cut selected text CTRL Z Undo redo text input Q Show QC script Equivalent to a L Show Limits Equivalent to lich I Show Information Equivalent to i H Hide Limits Equivalent to El M Release measurements Equivalent to a 19 4 7 QC REGISTERED FILE EXTENSIONS CLIO Quality Control registers the following files extensions beyond the ones already registered by CLIO QC script files QC Limits files 26 19 QUALITY CONTROL 19 4 8 QC OPTIONS DIALOGS CLIO Options General Units Conversion Graphics Hardware QC Operators amp Passwords QC Script Input Start Signal Start Signal QCBox5 Pedal v Logic Active Low B Duration ms 25 TCP Server Port Serial Port Baud 14800 j None Bits 8 None K 4 Under CLIO Options gt QC you may define the following QC Script Input Start Signal The external trigger signal or condition to start the QC see 19 8 4 OCBoxs Pedal M LiCBoxb Pedal LCBoxb Biti LiCBoxb Bit 1 OCBoxS Bit 2 LiCBoxb Bit 3 LiCBox5 Bit 4 LCBox5 DevCon LCboxi Pedal LFT Port It is possible to trigger the QC tests sequence with the following 1 A foot pedal switch connected to QCBox Model 4 or 5 Pedal In connector 2 The connection of the loudspeaker under test sensed by QCBox Model 5 3 An external TTL signal wired to one of the QCBox Model 5 input 4 An external TTL signal wired to the PC parallel printer port
3. 19 4 6 QUALITY CONTROL MENU AND SHORTCUTS CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help c I mus e Logchirp Ctrl em E Waterfall amp Directivity Ctrl ewe w Acoustical Parameters Cri A lu FET amp RTA Ctrl F Au Sinusoidal Ctrl S 5 Multi Meter F4 To T amp S Parameters CErl T WE wow amp Flutter Chrl tale Leg Leg Chrl h a Linearity amp Distortion Ctrl D Quality Control Sa 3 w Trace w Display Result Shrink to Gut Result Stop T External Trigger Skip Last Input Sh Show Report E 5 F Mer PJ Edit E Save Fz t Show Qe Script a Shom Limits L Show Information I Capture Display Limits Draw Limits Hide Shows Limits H Release Measurements M Figure 19 22 Figure 19 22 shows the Quality Control menu accessible from the Analysis menu Seen below is a list of all the available Hot Keys ESC or T Exits the QC test sequence End Exits the QC test sequence in Interactive mode SpaceBar Continues the QC test sequence in Interactive mode Starts a QC test Equivalent to gt Skip last executed measurement Equivalent to Input serial number Equivalent to N Show Report Equivalent to El za NN A 0 New QC script Equivalent to 7 E Edit QC script Equivalent to F2 Saves QC script Equivalent to ta CTRL E Ends an editing session while inside the text display CTRL C 19 QUALITY CONTROL 25 Copy selected text CTRL V Paste selected text
4. QES T amp S QMS T amp S VAS T amp S BL T amp S MMD T amp S MMS T amp S DBSPL T amp S ZMIN T amp S RLR MLS sinusoidal SLR MLS sinusoidal STMR MLS sinusoidal FREQUENCY multimeter IMD multimeter PRESSURE multimeter THD multimeter VOLTAGE multimeter When measurement is stereo you may append A or B to identify channel VAS B refer to the Vas T amp S parameter calculated for an impedance measurement done with channel B OUT Sets the generator output level with OUTUNITS defined under GLOBALS See also EQREFERENCE OUTQCBOX Sets the generator output level taking into account QCBox gain with OUTUNITS defined under GLOBALS This is the level that will be present at QCBox output See also EQREFERENCE POLARITY 1 Executes a polarity check Valid for an MLS or Sinusoidal measurement 0 Not Active If omitted defaults to O PROCESS Name of a process file to be applied to the test Valid only for MLS and Sinusoidal measurements REFERENCE Name of the reference file SAVEBINARY 1 saves also in binary format if SAVETEXT 1 Ignored if used alone If omitted defaults to 0 Remember that if neither SAVETEXT nor SAVEBINARY are specified the default format is binary SAVENAMEName of the file to be saved SAVEONBAD 1 automatically saves the current measurement if bad 0 Not active If omitted defaults to 0 104 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE
5. CLIO ELECTRICAL amp ACOUSTICAL TESTS CLIO electrical and acoustical fine measurement system i Mie l fi Y Ben i DE Saa E CLIO 10 Audiomatica Florence Italy Copyright 1991 2009 AUDIOMATICA All rights reserved All product names are trademark or registered trademark of Audiomatica CLIO Software Release 10 Quality Control Extension User s Manual AUDIOMATICA Copyright 1991 2009 by AUDIOMATICA SRL All Rights Reserved Edition 10 01 September 2009 IBM is a registered trademark of International Business Machines Corporation Windows is a registered trademark of Microsoft Corporation CONTENTS 19 QUALITY CONTROL irisan niinn OD TO LEIN FRODUC THON ns 5 192 FEATURES DECO OE a a a a oE 5 1922 1 THE OPERATOR S POINT OP VIE Wind 6 19 22 THE ENGINEER S POINT OF VIE Wisin 8 19 2 HE COMPANY S POINT OF VIEW osorno A 9 19 2 4 OPERATORS AND PASSWORDS MANAGEMENT cceeeeeeeeeee eee eeeee 10 19 Zo DIGIIALLY SIGNED OC FILE Saca 12 1933 THE OC SOFTWARE OPERATION NA 13 19530 THE REFERENCE FILE a ata 15 19 3 2 THE LIMITS FILE FOR SINGLE CHANNEL MONO OPERATION 15 19 3 3 LIMITS FILE FOR TWO CHANNELS STEREO OPERATION 00085 17 TA TAE OG ECON TROL PANEL ura 18 19 4 de TOOLBAR BUTTON Saa 18 19 42 THE OC REPORT PANE Losa ated weeuicanittnnngas s 21 19453 REVIEWING A MEASUREMEN Corsa rail invade 21 194 4 THE OE RESULE PANEL NS 24 1 ARE OE BAININE Sas no 24
6. COMPANY Text used as the first title of the QC control panel Usually the company name DELAY Value in milliseconds of a pause to be performed DISPLAY 1 displays the result of each measurement 0 executes all the measurements without displaying If omitted defaults to 1 i e DISPLAY 98 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE DISPLAYONBAD 1 displays the measurement if bad Applies to all the measurements 0 Not active If omitted defaults to O DISPLAYTIME Approximate time of display in ms when in DISPLAY mode IN Sets the input sensitivity for both input channels INA Sets channel A input sensitivity channel B sensitivity remains untouched INB Sets channel B input sensitivity channel A sensitivity remains untouched INITIALBITS 8 BIT binary value that will be output from LPT port at startup before QC Script execution INCREASEONBAD 1 Increases serial number when unit is bad 0 Does not increase serial number when unit is bad If omitted defaults to 1 i e increases on bad INTERACTIVE 1 displays the result of each measurement and prompts 0 executes all the measurements without prompting If omitted defaults to O i e NOT INTERACTIVE MANUAL 1 starts the QC sequence manually pressing Go 0 the sequence is started by an external trigger signal If omitted defaults to 1 i e MANUAL MESSAGEONBAD Text to be displayed when unit performs bad If omitted defaults to BAD MES
7. 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 101 Defines the logic of the external trigger signal 1 is active high 0 is active low If omitted defaults to 0 i e active low STATISTICS 1 Enables statistical data files generation 0 Disables statistical data files generation If omitted defaults to O STATFILESRES Number of data lines present in statistical frequency files maximum is 2048 TITLE Text used as the second title of the QC control panel Usually a description of the test WYSIWYG Enables wysiwyg processing Valid only for MLS tests 0 Disables wysiwyg processing If omitted defaults to O 102 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 4 2 KEYWORDS FOR MEASUREMENTS SETTINGS FFT Starts a section containing the definition of an FFT measurement MLS Starts a section containing the definition of an MLS measurement SIN Starts a section containing the definition of a Sinusoidal measurement MET Starts a section containing the definition of a Multimeter measurement ACQUISITIONDELAY Approximate time in milliseconds that is expected before executing the measurement after switching the generator on Valid only for FFT and Multimeter measurements COMMENT Input a text comment used by the report files This text is also output during the script execution in the measurement title bar DISPLAYONBAD 1 displays the measurement if bad 0 Not active If o
8. 92 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE Please note also the following differences with standard QC operation No serial number management is performed No batch management is performed No production report files are saved No statistical information are calculated 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 93 20 3 5 KEYWORDS FOR QC SERVICES All the keywords available to the QC scripts processor see 20 4 are valid with few exceptions and can be sent to the TCP server There are some specific keywords that are listed below Special keyword that tells the TCP server to execute the command or measurement input HIDECLIO Enables background execution of TCP server The CLIO desktop will not be visible SHOWCLIO Resets normal operation of CLIO when TCP server is active The CLIO desktop will be visible NOREPORTSAVED 1 No detailed information are sent back by the TCP server Only the global result will be sent 0 The TCP server sends all the information about executed measurements beyond the global test result If omitted defaults to O QCWORKDIR Defines the folder where the reference and limits files reside If omitted defaults to the current folder of CLIO 94 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 3 6 TCP SERVER EXAMPLE A C CLIENT APPLICATION A fully commented sample C client console application that is able to c
9. Options gt QC dialog CUO Options General Units Conversion Graphics Hardware OC Operators de Passwords OC Script Input Start Signal start Signal QCBox5 Bit Logic Active Low Duration ms 25 el The output bits operation should be defined directly inside the QC script and should reflect how CLIO and the automation interact We suppose the following meaning of the output TTL bits BITO gt Signals the end of the sweep BIT1 gt Signals if result is good BIT2 gt Signals if result is bad The keywords that should be added to our script lead to the following situation PERFORM 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 71 OCBOXOUTBYTE 0 SAUNA OUTOCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM LIMITSB IMPEDANCE LIM POLARITY 1 PERFORM OCBOXOUTBITO 1 IF ALL GOOD QCBOXOUTBITI 1 IF ALL BAD OCBOXOUTBIT2 1 Here you may see the initial keyword QCBOXOUTBYTE 0 that resets all three signals to zero Then after the test is finished they are set to reflect the end of sweep and the result of the test The only thing to be noted is that BITO end of sweep is output when the sinusoidal test is finished i e right after all calculations and measurement managements are made This means that it will be delayed with respect to the actual end of the sweep by the time the computer takes to make all the calculations and actions related to a si
10. Refer also to AUTOSAVE SAVEONGOOD 1 Autosaves the current measurements if result is good 0 Does not perform autosave If omitted defaults to 0 If you want to autosave also in case of bad measurement add the keyword SAVEONBAD 1 SAVEPROMPT 1 Prompts the user for file name input 0 Autosaves without prompting If omitted defaults to O SAVETEXT 1 saves ASCII file instead of binary format 0 saves files with normal binary format If omitted defaults to O SAVETEXTPARAM Controls the kind of exported data For MLS 0 Display Frequency Data 1 FFT Frequency Data 2 Time Data For FFT 0 Display Frequency Data 1 FFT Frequency Data 2 Last FFT Data 3 Last Time Data For Sinusoidal 0 Frequency Data 1 Frequency Distortion Data SAVETEXTPARAM2 Controls the number of saved frequency points valid only for MLS 0 saves 256 points 1 saves 512 points 2 saves 1024 points 3 saves 2048 points If omitted defaults to O i e 256 points 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 105 20 4 3 KEYWORDS FOR AUXILIARY TESTS AND MATH OPERATION AUX TEST LOWER UPPER Starts a section containing the definition of an auxiliary test or a math operation It can be the kind of math operation to be chosen among the following SUMn DIFFERENCEn MULTIPLICATIONn DIVISIONn where n denotes the relative operands number see 20 4 2 n may range from O to 9 Or it can be a value read by
11. WSAStartup 0x0101 amp wsaData memset char amp sad 0 sizeof sad sad s5in family Ar INEL set family to Internet Check command line argument for protocol port and extract port number if one is specified Otherwise use the default port value given by constant PROTOPORT IE ange 2 4 if protocol port specified port atoi argv 2 convert to binary else port PROTOPORT if port gt 0 use default port number test for legal value sad sin port htons u_ short port else print error message and exit fprintf stderr bad port number s n argv 2 exit 1 Check host argument and assign host name clear sockaddr structure interact with If no host name is specified aes as ef ae ene ae i si ave eS a e oy a 57 ls er 95 96 if argc gt 1 host argv 1 if host argument specified ey else host localhost Convert host name to equivalent IP address and copy to sad ptrh gethostbyname host if char ptrh NULL forintr stderr invalid host s n host exit 1 memcpy amp sad sin addr ptrh gt h addr ptrh gt h length Map TCP transport protocol name to protocol number if int ptrp getprotobyname tcp 0 fprintf stderr cannot map tcp to protocol number exit 1 Create a socket
12. sd socket PE INET SOCK STREAM ptrp gt p proto if sd lt 0 fprintf stderr socket creation failed n exit 1 Connect the socket to the specified server if connect sd struct sockaddr amp sad sizeof sad lt O fprintf stderr connect failed n exit 1 Wait a little n 0 while n lt 1000000 n n Get greeting message n recv sd ibuf sizeof ibuf 0 write 1 ibuf n Repeatedly read write data from socket or stdin and write to user s screen while strcmp obuf exitin fgets obuf 127 stdin n send sd obuf string length obuf 0 n 0 while n lt 1000000 n n n recv sd ibuf sizeof but 0 write 1 ibuf n Close the socket closesocket sd Terminate the client program gracefully exit 0 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE int string length char str int i for i 07 a lt 807 14 ette 0 returni You can find the file of this example in the My Documents Audiomatica TCP Server folder 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 97 20 4 QC SCRIPT SYNTAX REFERENCE 20 4 1 KEYWORDS FOR GENERAL SETTINGS NOTE SCRIPTDIR means the directory where the QC script is saved GLOBALS Starts a section containing settings and definitions valid for the whole test sequence AUTOBATCH 1 Enables automati
13. 10 REFERENCE CH SIN LIMITS CH LIM PROMPT MESSAGE CONNECT MESSAGE2 OUTB gt CH2 SETTNPUTZ PERFORM DELAY 500 SIN REFERENCE CH SIN LIMITS CH LIM RESETMUTEA You can find the files of this example in the My Documents Audiomatica CLIO 10 EXAMPLES EXAMPLE2 folder 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 77 20 2 3 EXAMPLE 3 A TEST ON A STEREO ELECTRONIC EQUIPMENT A PREO The following self explaining script implements the procedure required to test the frequency response of a stereo equipment it is simulated by a couple of PRE 01 units each connected as in the picture to the two channels of CLIO Both PRE 01 have A weighting filter active the unit connected to channel B has 20dB gain Beyond the frequency response of the two channels the script also measure the A B difference response and output it to QC screen SIN OUT 0 0 dBV INA 10 INB 20 REFERENCE PRE01 A B20 SIN LIMITSA AB A LIM LIMITSB AB B LIM You can find the files of this example in the My Documents Audiomatica CLIO 10 EXAMPLES EXAMPLES folder 78 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 2 4 EXAMPLE 4 A CYCLIC SCRIPT USED TO MANAGE MY ROGERS LS3 5A TWO WAY LOUDSPEAKER PRODUCTION This example describes a hardware and software setup to do quality control over a production of loudspeakers units the responses are taken come from our samples of Rogers LS3 5A spe
14. 19 4 6 QUALITY CONTROL MENU AND SHORTCUTS ooooccccccccccccnancrnna 25 194 7 OC REGISTERED FILE EXTENSION Siiorida t 26 LORS OC OP MONS DIALOGS A A AAA 2 LRS IM FlRol OC SCRIP A A 28 19 3 L WHAT TO KNOW ABOUT OC SCRIPT Saa 28 19 32 NOW TO WRITE MN FIRST OC SERPA NEAT 28 19 06 NOTES ON LIMITS CURVES0a nada 32 19 6 1 ABSOLUTE VS RELATIVE FREQUENCY LIMIT Sii 34 19 6 2 AVERAGE LEVEL CHECK arias 36 19 05 ALIGNED NAS Kana 39 1956 4 SENSLTIVITY CHECK rra 40 19 6 5 FLOATING LIMITS VS FLOATING CURVES cc ccccee cece eee e eee eens 41 19 6 6 SINUSOIDAL A B STEREO DIFFERENCE CHECK cccceee eens senna 42 19 6 7 SINUSOIDAL THD AND FAST TRACK RUB amp BUZZ CHECK 08 43 190 0 HIELESSMALE PARAMETERS CHECK i 44 19 6 9 LOUDNESS RATING CALCULATION AND CHECK ccceeeceeeee eee e eee 45 19 03L0 MULTIMELER LIMITS FILES adi 46 19 7 MANAGING PRODUCTION BATCHES ani a a 47 19 41 DIRECTORIES CREAFED BY CLIO OC oras das 47 19 72 PRODUCTION REPORT FILES raros 48 1937 gt AUTOSAVEDIDATA HLES ad 49 19 7 4 STATISTICAL INFORMATION ON MEASURED DATA ccceeee eens 49 19 0 SERIAL NUMBER MANAGEMENT o 50 19 40 THE SISI LAS E BUTTON rinna E acceesseamponamnaere ter NA 51 19 8 INTERACTING WITH EXTERNAL HARDWARE ccc cceeeeeee eee e teen eee ee eneees 52 19 8 1 INPUT SENSITIVITY AND OUTPUT VOLTAGE CONTROL 0085 52 19 3 2 QCBOX MODEL 5 DC OUTPUT CONTROL cociocoriaiaa i ivews 52 19 8 3 CLIOQC AMP
15. 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 65 The final parameter that we should take into account is the sensitivity of the loudspeaker programming a chirp with same frequency extremes and analyzing it with the multimeter we obtain a sensitivity of the reference of 106 dBSPL this value leads us to complete the limits file definition with sensitivity data SENSITIVITY UPPER 109 LOWER 103 20 1 3 MEASURING THE REFERENCE IMPEDANCE RESPONSE We put now our attention to the impedance response of our loudspeaker Going back to sinusoidal menu we choose CHB with the input channel selector and Ohm as Y Scale unit inside the sinusoidal settings dialog leave all previous settings unchanged as they will accompany us to the final reference measurement only change the impedance settings to QCBox Select to reflect QCBox operation As the output level has already been set for the acoustic test we only have to deal with input sensitivity for channel B a settings of 30dBV or 40dBV is usually correct for ISense impedance tests The measurement looks as follow aIl QA M HOOAOFOAOEOBOFOBOBO A B E f N 20 100 200 500 1k Hz 10k 20k Save the result to impedance sin file We are now able to define also the limits file needed to check the impedance response Going back to the QC menu inside limits control panel we should clear information about frequency response masks and be ready for new input A response
16. Current Under a QC script it is possible to apply DC with the following synthax PERFORM OCBOXDCOUT 1 2 SIN REFERENCE RESPONSE SIN LIMITS RESPONSE LIM PERFORM OCBOXDEQUI 1 2 SIN REFERENCE RESPONSE SIN LIMITS RESPONSE LIM PERFORM OCBOXDCOUT 0 In this example it has been applied a 1 2V DC voltage to a sinusoidal test the same could have been applied to a FFT with log chirp or any other test to be noted that the same test must be executed twice as we don t know a priori which direction stimulates the defect to arise In this case also lower harmonics could be checked as when DC is present they become sensitive to R amp B too 86 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 3 CLIO QC TCP IP SERVER This is the CLIO answer to the general request of being able to control and use QC features inside custom applications It is an imperative need when audio testing is a part of a more complex QC process like in a cell phone QC test procedure when you must test also the display and other parts The choice of TCP IP approach presents several advantages 1 No additional learning curve as same CLIO QC script commands are used 2 Prevents the engineer to deal with complex API programming 3 It is independent from the Operating System Programming Language and kind of PC 4 It can be run locally or from another network connected PC 5 It is possible to write applications th
17. GET REFERENCE DATA GET ALIGN POINT DATA CALCULATE LIMITS CURVES Figure 19 27 Fig 19 28 shows us the way a frequency check is performed and the measurement is presented on screen You may appreciate the presence of an average level or sensitivity check see 19 6 2 or a single point aligned level check see 19 6 3 that concurs with the final result When a level or sensitivity check is defined either the measured curve or the limits curves are shifted if presented on screen in this way it is possible to appreciate the frequency behaviour of the measured curve without the effect of a difference in sensitivity which is checked separately AVERAGE LEVEL CHECK NO MEASUREMENT CHECK RESPONSE YES CALCULATE LEVEL ALIGN POINT SHIFT LIMITS A CURVES RESULT CALCULATE LEVEL IN CHECK LIMITS BAND LEVEL Figure 19 28a frequency plus average level check 32 19 QUALITY CONTROL SHIFT orf CHECK CURVE RESPONSE CALCULATE SENSITIVITY DEFINED FREQUENCIES SHIFT LIMITS FINAL CURVES RESULT CALCULATE SENSITIVITY IN LIMITS BAND CHECK SENSITIVITY Figure 19 28b frequency plus sensitivity check As a final but not less important note we show an alternative method to define a limits file it is possible to input the frequency mask as a text file as below UPPER LIMIT DATA PUP PES TAL
18. LEVEL THD Voltage 0 774Vrms GOOD THD 0 005 GOOD THD 0 005 Voltage 0 774 Vrms 0 T 14 Vrms Dor 1 GOOD FREQUENCY RESPONSE Response GOOD 2 GOOD LEVEL THD Voltage 0 774Vrms GOOD THD 0 005 GOOD 17 1 2006 3 16 49 PM UNIT N 40020256 GOOD UNIT N 40020256 READY AB Ww io Out 0 0dBu v a HRA wm 40 40 Figure 19 2 A third possibility is to view and interact with the test sequence during its execution Hex CLIO ELECTRICAL amp ACOUSTICAL TESTS THD 0 008 Voltage 0 775 vrms r Figure 19 3 Completed test information and reports are always presented to the user a STATISTICS MY COMPANY MY QUALITY CONTROL DATE 23 05 02 INITIAL SN 1 TOTAL TESTS 26 GOOD 26 oa BAD 0 E F TEST REPORT e UNIT N 40020282 GOOD 17 49 30 E 1 GOOD MLS 8 Response GOOD 2 GOOD MET Y Voltage 0 774Vrms GOOD 8 THD 0 004 GOOD UNIT N 40020281 GOOD 17 49 28 UNIT N 40020280 GOOD 17 49 26 UNIT N 40020279 GOOD 17 49 25 UNIT N 40020278 GOOD 17 49 23 9 UNIT N 40020277 GOOD 17 49 21 Figure 19 4 19 QUALITY CONTROL 19 2 2 THE ENGINEER S POINT OF VIEW As the QC is integrated inside the CLIO software no new user interface has to be learned by the engineer who has experience of CLIO inside her or his research laboratory A quality contr
19. LOWER LIMIT DATA FILE LOWER TXT The files upper txt and lower txt are export ASCII files that may be produced by other applications or CLIO itself The upper txt file may look like Freq Hz qdBV 100 5 500 gt 5000 1 10000 5 19 QUALITY CONTROL 33 19 6 1 ABSOLUTE VS RELATIVE FREQUENCY LIMITS The following limits file defines an absolute frequency limit ABSOLUTE UPPER LIMIT DATA 200 100 300 OF 10000 JA 15000 LOQ LOWER LIMIT DATA 200 82 300 85 10000 85 15000 82 The frequency mask is shown in Fig 19 29 BI MLS iof x BI MLS Ox AAA Oo les El 200 E i 12 Octave E Figure 19 29 and 19 30 The following limits file defines a relative frequency limit RELATIVE UPPER LIMIT DATA 200 3 300 2 10000 2 15000 2 LOWER LIMIT DATA 200 300 10000 2 15000 gt The frequency mask is shown in Fig 19 30 Relative means with respect to the reference file defined in the QC test Data values will be added and subtracted to the reference value at the specified frequencies Relative data values may be considered as percentages The following keywords is required RELATIVE PERCENT 1 The above mask may be defined for an impedance measurement curve and considered as percentage in this assumption it the calculated limits curves would 34 19 QUALITY CONTROL differ by 2 in the 300 10000Hz
20. Note For fastest operation when using QCBox Model 5 input use bits 2 3 or 4 Bits O and 1 requires minimum 100ms duration TCP Server The listening port of the TCP server see 20 2 Serial Port A serial port to be controlled by QC see 19 8 8 19 QUALITY CONTROL 27 19 5 MY FIRST QC SCRIPT 19 5 1 WHAT TO KNOW ABOUT QC SCRIPTS A quality control script is a text file that stores information in logical groupings called sections Each section is initiated by a bracketed keyword in the form keyword Within each section QC definitions are stored in named keys Keys within a section take the form keyword value For example the section called GLOBALS defines several settings useful all along the test sequence GLOBALS COMPANY MY COMPANY TITLE MY QUALITY CONTROL BATCH MY PRODUCTION BATCH NAME It is possible to input comment lines initiated by a semicolon It is not possible to start a comment after a keyword sthis 1s a correct comment line COMPANY MY COMPANY this comment is not allowed With an understanding of these brief notes you are ready to write a QC script 19 5 2 HOW TO WRITE MY FIRST QC SCRIPT You may write your script with any text editor that stores plain ASCII files usually txt ones like Notepad the only thing you should remember is that QC scripts must have the qc extension while limits files use the lim extension the common behavior of Windows to hide registered file extensions so
21. PRESSURE VOLTAGE FREQUENCY THD IMD 46 19 QUALITY CONTROL 19 7 MANAGING PRODUCTION BATCHES Managing a production batch is a rather complex while delicate topic as it involves diverse needs of diverse areas inside your company CLIO QC handles your batch doing the following Maintains a directory structure where different files are saved Automatically saves production report files If requested autosaves data files Handles 24 characters alphanumeric serial numbers Auto increments serial number and maintains its coherence Calculates statistical data about the batch The result is that you will find the production well documented both for your internal purposes aimed to achieve the highest quality standard and also for interfacing with your client who requests technical information about the units 19 7 1 DIRECTORIES CREATED BY CLIO QC Suppose you saved your script inside the directory My qc When you run the script CLIO automatically creates one or more directories under My qc There are four cases depending on the option you set 1 No Autosave is active A Batch is not defined CLIO creates the Report directory where all the production report files are saved Fig 19 37 shows this situation 2 Autosave is active A SaveFolder is not defined A Batch is not defined CLIO creates the Report directory where all the production report files are saved It also creates the Autosave direc
22. QC related It is a good idea to dedicate a directory for each QC test The files involved here are 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 73 PREO1 QC LEV1 LIM A LIM B LIM C LIM ASHIFT SPRO You can find them in the My Documents Audiomatica CLIO 10 EXAMPLES EXAMPLE1 folder GLOBALS COMPANY AUDIOMATICA S R L FLORENCE TITLE PREOL TEST PROCEDURE INTERACTIVE 1 SAVEONBAD 1 PERFORM MESSAGE FILTER OFF DIP ON OFF OFF OFF MET OUT 2 44 IN 10 REFERENCE FILTER MET LIMITS LEV1 LIM PERFORM MESSAGE FILTER ON DIP ON OFF OFF OFF MET OUT 2 44 IN 10 REFERENCE FILTER MET LIMITS LEV1 LIM LOOP 1 PERFORM MESSAGE FILTER ON DIP ON OFF OFF ON MET QUI 1 750 IN 10 REFERENCE SFILTER MET LIMITS LEV1 LIM LSIN OUT 10 IN 10 REFERENCE A SIN LIMITS A LIM PROCESS ASHIFT SPRO PERFORM MESSAGE FILTER ON DIP OFF ON OFF ON SIN OUT 10 IN 10 74 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE REFERENCE A SIN LIMITS B LIM PROCESS ASHIFT SPRO PERFORM MESSAGE FILTER ON DIP OFF OFF ON ON SIN OUT 10 IN 10 REFERENCE A SIN LIMITS C LIM PROCESS ASHIFT SPRO PERFORM MESSAGE 5ET DEFAULT SETTINGS FILTER OFF DIP ON OFF OFF ON 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 2 2 EXAMPLE 2 THE AMPLIFIER amp SWITCHBOX UNDER QC From CLIO 4 r p CLIOQC Model 4 Ampli SwitchBox i ISense To CLIO
23. QCBox Model5 QCBOXINBITO QCBOXINBIT1 QCBOXINBIT2 QCBOXINBIT3 QCBOXINBIT4 QCBOXINBYTE QCBOXINDC3 QCBOXINDC4 QCBOXOUTCURRENT Lower limit for the math operation check Upper limit for the math operation check QCBOXINBITVALUE Value of the input bit to be checked QCBOXINBYTEVALUE 106 Value of the input byte to be checked 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 4 4 KEYWORDS FOR CONDITIONAL EXECUTION PERFORM Starts a section which is always executed unaffected by the result of the preceding measurement See below for the keywords possible within IF LAST GOOD IF LAST BAD Starts a section conditioned by the result of the preceding measurement IF parameter GOOD IF parameter BAD Starts a section conditioned by the result of one particular parameter measured during the preceding measurement parameter can be one of the following LEVEL MLS sinusoidal FFT SENSITIVITY MLS sinusoidal FFT RESPONSE MLS sinusoidal FFT POLARITY MLS sinusoidal A B sinusoidal RUB BUZZ sinusoidal TOTAL HARMONIC sinusoidal 2 HARMONIC sinusoidal 3 HARMONIC sinusoidal 4 HARMONIC sinusoidal 5 HARMONIC sinusoidal 6 HARMONIC sinusoidal 7 HARMONIC sinusoidal 8 HARMONIC sinusoidal 9 HARMONIC sinusoidal 10 HARMONIC sinusoidal FS T amp S QTS T amp S QES T amp S QMS T amp S VAS T amp S BL T amp S MMD T amp S MMS
24. S P Lipshitz T C Scott and J Vanderkooy Increasing the Audio Measurement Capability of FFT Analyzers by Microcomputer Postprocessing J Audio Eng Soc Vol 33 1985 September 5 D D Rife and J Vanderkooy Transfer Function Measurement with Maximum Length Sequences J Audio Eng Soc Vol 37 1989 June 6 A Duncan The Analytic Impulse J Audio Eng Soc Vol 36 1988 May 7 J Vanderkooy and S P Lipshitz Uses and Abuses of the Energy Time Curve J Audio Eng Soc Vol 38 1990 November 8 G Ballou Handbook for Sound Engineers The New Audio Cyclopedia Howard W Sams amp Company 1987 9 D Davis and C Davis Sound System Engineering Howard W Sams amp Company 1987 10 R H Small Simplified Loudspeaker Measurements at Low Frequencies J Audio Eng Soc 1972 Jan Feb 11 D B Keele Jr Low Frequency Loudspeaker Assessment by Near field Sound Pressure Measurements J Audio Eng Soc 1974 April 12 W D T Davies Generation and properties of maximum length sequences Control 1966 June July August 13 FJ MacWilliams and N J A Sloane Pseudo random sequences and arrays Proc IEEE 1976 December 14 M R Schroeder Integrated impulse method measuring sound decay without using impulses J Acoust Soc Am 1979 August 15 J Borish and J B Angell An efficient algorithm for measuring the impulse response usin
25. SLR STMRLOWER Lower limit for STMR STMRUPPER Upper limit for STMR UPPER LIMIT DATA LOWER LIMIT DATA Start a section containing the frequency mask used for the QC check The frequency mask has to be defined as a list of N couples like Frequency_i Value_i 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 115 Frequency_N Value_N In the case of a multimeter measurement containing several measured parameters value It is possible to load frequency data from an external ASCII text file using the FILE keyword FILE Name of a text file containing a frequency mask definition FREQUENCY Executes a frequency check Valid for a multimeter measurement IMD Executes an intermodulation distortion check Valid for a multimeter measurement PRESSURE Executes a sound pressure level check Valid for a multimeter measurement THD Executes a total harmonic distortion check Valid for a multimeter measurement VOLTAGE Executes a voltage check Valid for a multimeter measurement A B UPPER LIMIT DATA A B LOWER LIMIT DATA RUB BUZZ UPPER LIMIT DATA RUB BUZZ LOWER LIMIT DATA THD UPPER LIMIT DATA THD LOWER LIMIT DATA n UPPER LIMIT DATA n LOWER LIMIT DATA n may range from 2 2nd harmonic to 10 10th harmonic Start a section containing the frequency mask used for the QC check of the following calculated curves within a sinusoidal sweep The presence of the relative section defines the QC ch
26. T amp S DBSPL T amp S ZMIN T amp S RLR MLS sinusoidal SLR MLS sinusoidal STMR MLS sinusoidal FREQUENCY multimeter IMD multimeter PRESSURE multimeter THD multimeter VOLTAGE multimeter IF ALL GOOD 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 107 IF ALL BAD Starts a section conditioned by the global result of the QC sequence Note The following keywords apply to any kind of section for conditional execution BIT Number of the bit to be singularly controlled with BITVALUE BITVALUE Status 1 or O of the bit defined with BIT 8BITVALUE 8 BIT decimal value to be output by the currently selected parallel port ABORT Stops the script execution after executing all keywords in the current section Result is forced bad See also STOP CLOSESERIAL Closes the QC COM port after serial communication DELAY Value in milliseconds of a pause to be performed EXPORTGRAPHICS Exports the current measurement to a graphical file The same file naming convention used for data files is used EXTERNAL Name of an executable file to be launched See also PARAMETERS and WAITCOMPLETION IN Sets the input sensitivity for both input channels INA Sets channel A input sensitivity channel B sensitivity remains untouched INB Sets channel B input sensitivity channel A sensitivity remains untouched MESSAGE Text to be displayed in a prompting message to the user MESSAGE2 Second line of tex
27. Text mode Input the following frequency masks as limits UPPER LIMIT DATA 20 ee 30 e 15000 ay ree 20000 Sa LOWER LIMIT DATA 20 E a 30 is an 15000 e 20000 al one Press F2 and save the limits file as loopmls lim Now click now on the a script button and then click on the capture button Your blank text display should now be filled with your first QC script MLS OUT 0 0 IN 0 REFERENCE LOOP MLS LIMITS LOOPMES LIM It is a good practice to add the following comment line COMMENT FREQUENCY RESPONSE Click on the gt go button the QC processor should execute a QC test performing an MLS measurement displaying it together with the defined limits everything as in Fig 19 24 the text display should now present information on the executed test 19 QUALITY CONTROL 29 CLIO ELECTRICAL amp ACOUSTICAL TESTS Sele File Analysis Controls Window Help Seles DEB Gh Sava 1 GOOD MLS Response GOOD 21 04 2005 17 35 38 UNIT N 2 GOOD UNIT N 3 READY Figure 19 24 Let s now complete this first exercise by adding a Multimeter measurement of level and total harmonic distortion at 1kHz Press F4 to open and run the Multimeter control panel then click on the ipl generator button to switch the generator on and play the default 1kHz sinusoid Now press T to stop measuring save this measureme
28. With this choice in the drop down menu associated with the QC result button it is possible to display a minimized version of the QC Result Panel see 19 4 4 6 Enables external trigger This button overrides the setting in the script MANUAL keyword See 19 8 2 and the commands reference for more details 3 Skips the last measured unit y Used to input the current device serial number El Recalls the QC Report panel Refer to 19 4 2 for more details 18 19 QUALITY CONTROL I Releases all the measurement control panels Each panel reverts to its normal appearance In fact when a QC test sequence is running each panel loses its toolbar overlay and curve controls and status bar in order to maximize the graph display when the windows are tiled Fig 19 14 shows the MLS control panel in the two different situations DE MLS Response GOOD EEE 9 y gerardo cod ae Deg 108 0 36 0 H 36 0 H 108 0 l 180 0 1k Hz 10k 20k CHA dBY Unsmoothed 48kHz 16K Rectangular Start 0 00ms Stop341 31ms FreqlO2 93Hz Length3 Figure 19 14 When control panels are managed under QC the title of the window is used to display the result of the parameters that have been measured or calculated in Fig 19 15 we see written Response GOOD which reports the result of the MLS frequency response check done Starts a new QC
29. and by the MANUAL keyword inside the QC script Fig 19 41 shows a foot pedal switch and shows its connection to the PC to enable the control of the QC test LPT Start a Figure 19 41 The QCBox Model4 and Model 5 have a dedicated input PEDAL IN that can be used to connect the external foot pedal or trigger signal The following lines are needed inside a script file to enable a switch or externally generated TTL signal to start and continue a QC measurement GLOBALS MANUAL 0 Please refer to 19 8 7 19 8 8 and to the commands reference for more details on TTL input signal management 19 8 5 TTL SIGNALS GENERATION CLIO QC has powerful capabilities to generate and read TIL control signal to be able to interface with an external line automation 54 19 QUALITY CONTROL To manage these TTL signals it is possible to use 1 The parallel port of the computer if present 2 The dedicated Digital I O port of the QCBox Model 5 USB controlled It is possible to define the status of the bits of the digital port involved the following is a list of the kind of signals possible signals output at startup INITIALBITS QCBOXINITIALBYTE signals conditioned by the result of a single measure IF LAST GOOD IF LAST BAD signals conditioned by the global result IF ALL GOOD IF ALL BAD unconditioned signals PERFORM Let s see an example of generation of external signals conditioned by the result of the mea
30. in addition to PC peripherals computer networks or with custom written software to implement a fully automatic test line CLIO QC can be configured to act as a measurement server It is possible to easily integrate the sophisticated QC measurement techniques of CLIO inside custom written applications Interaction takes place with TCP IP transfer protocol giving the possibility of remote control over a network 19 2 FEATURES OF CLIO QC CLIO QC is exceptionally powerful as it relies on the power of CLIO Here is a list of the parameters that can be calculated within each measurement Sinusoidal Frequency response and impedance response mono or stereo tests Average or single frequency level Sensitivity average or up to eight frequencies Polarity Total harmonic distortion response Single harmonic response from 2nd to 10th Fast Track Rub amp Buzz response T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin Loudness Rating RLR SLR STMR MLS amp CHIRP Frequency response or impedance response mono tests Average or single frequency level Sensitivity average or up to eight frequencies Polarity T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin Loudness Rating RLR SLR STMR FFT Frequency response with definable stimulus mono tests also interactive Average or single frequency level Sensitivity average or up to eight frequencies METER SPL Volts THD IMD sin
31. mpl Sense al 2 0 A Out Current Type Sense Fi Uhm S0000006000595 Model 5 0 100 Seeeeececeeee We will deal later with QCBox settings for connecting with the automation Once the hardware connections are firmly setup take a reference loudspeaker representative of the production and put it in place ready to be measured We Suppose to deal with a wideband automotive 4 loudspeaker This quality control application relies on a stereo sinusoidal test that simultaneously measures frequency response by means of a microphone connected to input A and impedance sensing load current to input B It is suggested to divide the initial approach in two separate single channel measurements of the two quantities and finally integrate them into a single stereo one 62 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 1 2 MEASURING THE REFERENCE FREQUENCY RESPONSE Open the sinusoidal menu Let s start with the acoustic frequency response and set up the required sweep opening the settings dialog The main parameters affecting Sweep are frequency range chosen from 30Hz to 15kHz resolution of 1 12 of octave supposed to be fine and speed that is set to Fast as best tradeoff for rub amp buzz testing Before taking the first reference measurement you still need to set the proper output level here chosen 1V at speaker terminals as indicated by DUT specifications and accordingly set input sensitivity of CLIO input A as t
32. passwords modify or delete them It is possible to define up to 100 different users It is also possible to activate operation only with digitally signed QC files see later All settings relative to passwords and operators are encrypted and saved inside the qc stp file that resides in the CLIO s temporary folder see chapter 5 deleting this file resets CLIO to the initial default situation THE OPERATOR S POINT OF VIEW WHEN DEALING WITH PASSWORDS Upon invoking the Quality Control menu it is given access only to registered operators Please Login Operator USERI Password The same prompt is also given each time a new QC script is loaded from disk If digitally signed files operation is enabled only correctly signed files could be run otherwise the following prompt appears The QC operations are marked with the logged operator s name File Analvsis Control Window Help 19 QUALITY CONTROL 11 PA INITIAL SN t PA TOTAL TESTS 3 BAD Lol OPERATOR USER oe al TFET oronor and her his name is also saved inside reports An operator cannot force the result of a test with the Skip Last function unless supervisor MASTER consent is given 19 2 5 DIGITALLY SIGNED QC FILES The MASTER operator is capable of digitally signing the QC script and Limits file needed to run a quality control test When this kind of operation is active all text files found in the test mus
33. script editing session The text present is canceled Edit the current text m Immediately saves the current text as Script or Limits file lat Enters the Script Text mode The QC display presents the currently loaded QC script file lih Enters the Limits Text mode The QC display presents the currently loaded Limits file li Enters the Information Text mode During tests the QC display shows the current QC script section under execution When the test sequence is finished the QC display shows information about the executed tests If in Script Text display mode captures the active measurement generating a piece of script file relative to the currently loaded reference and limits files The text is inserted at cursor position As an example the following text is generated in the assumption that you have MLS open with the active measurement saved as myreferencefile mls and that you have loaded the mylimitsfile lim inside QC also captured are output level and input sensitivity here assumed to be OdBu and OdBV respectively MLS OUT 0 0 IN 0 REFERENCE MYREFERENCEFLLE MLS LIMITS MYLIMITSFILE LIM 19 QUALITY CONTROL 19 If in Limits Text display mode captures the limits file of the active measurement loading it inside the QC display Creates the frequency curves relative to the limits file under editing and shows them in the active measurement control panel _ Enables the Draw Limits controls that let you v
34. see 19 6 7 Note When a distortion curve is displayed its graphical properties are defined within CLIO Otpions gt Graphics gt QC Curve C For A B stereo difference QC check do the following 1 Execute and save a stereo reference measurement 2 Define a limits file adding the limit definition A B UPPER LIMIT DATA A B LOWER LIMIT DATA Select A B calculated curve for display A B DISPLAY 42 19 QUALITY CONTROL 19 6 7 SINUSOIDAL THD AND FAST TRACK RUB amp BUZZ CHECK When executing sinusoidal frequency response measurements it is possible to activate quality control checks over calculated THD Rub amp Buzz or single harmonic from 2nd to 10th response curves Calculation and QC check is possible for any distortion curve The display is possible only for one curve chosen among the pool of the curves calculated within a single sinusoidal test see 19 6 6 Note When a distortion curve is displayed its graphical properties are defined within CLIO Options gt Graphics gt QC Curve C For THD and Harmonics QC check do the following 1 Execute and save a reference measurement with THD Enabled under settings 2 Define a limits file adding the limit definition THD UPPER LIMIT DATA for THD and for any harmonic if desired 2 UPPER LIMIT DATA 3 UPPER LIMIT DATA EO UPPER LIMIT DATA Select one calculated curve for display THD DISPLAY For Fast Track Rub amp Buzz QC check do the fo
35. set to OdB as we are going to accommodate all displayed curves inside one single 100dB Y scale graph Execute the measurement with final frequency response settings 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 63 2 La 50 100 200 500 1k 2k Hz Sk 10k 20 After the measurement is done we may inspect THD and Rub amp Buzz pressing the relative buttons in figure they are shown as overlays green THD red R amp B Repeat the measurement until fully confident with the results obtained eventually refine the settings as needed k We are now ready to define QC masks for frequency response THD and Rub amp Buzz Open the QC menu press the limits button to start defining a limit definition we require and manually input a relative mask to frequency response with the following behavior RELATIVE UPPER LIMIT DATA 20 10 80 10 100 a 5000 E 6000 2 20000 J LOWER LIMIT DATA 20 10 80 100 gt 5000 gt 6000 5 20000 ME Y rms OUN A EIN AAA i a a IATA Lh do TAn EET The limits definition for THD and R amp B is for their nature inherently absolute and only requires an upper curve so we may begin defining them by direct on screen drawing 64 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE Pressing the THD button inside sinusoidal menu you obtain the THD curve inside QC you press the Draw Limits Controls button and you are allow to draw a limit curve directly on the
36. sinusoidal graph at the end the QC limit definition panel will be filled with data about the drawn limit THD UPPER LIMIT DATA 30 81 62 00 114 96 60910 ee arate CO 1603 03 TO LO LO569 90 64220 10869 90 64 220 Pressing the R amp B button inside sinusoidal menu you obtain the R amp B curve inside QC you press the Draw Limits Controls button and you are allowed to draw a limit curve directly on the sinusoidal graph at the end the QC limit definition panel will be filled with data about the drawn limit RUB BUZZ UPPER LIMIT DATA Us al 48 32 143 15 48 76 445 16 60 49 1092 02 NS SALDO SOULS ex qe m macs 0000000 Ae me 72 a a aang nac sacada aaar ee dBSPL OM o m 60 0 It is time to save the limits file as response lim As we are dealing with an unsmoothed frequency response that is presenting some high frequency peaks and dips we like to give a 1 6 of octave frequency jittering to the calculated limits curve RELATIVE FREQUITTER 0 16 That gives our frequency mask a more comfortable behavior that is less prone to give false negatives in that troubled spectrum range
37. the capability of superimposing a DC voltage to the generated signal It is possible to manage this DC voltage with the QCBOXDCOUT keyword This DC voltage ranges from 20 to 20V The script below sets a 2V DC at speakers terminals PERFORM OCBOXDCOUT 2 52 19 QUALITY CONTROL 19 8 3 CLIOQC AMPLIFIER amp SWITCHBOX CONTROL Using a CLIOQC amplifier amp switchbox it is possible to setup a powerful QC environment like the ones described in chapter 20 Custom keywords have been implemented to easily control all the internal functions of this unit SETINPUT1 Selects SETINPUT2 Selects SETINPUT3 Selects SETINPUT4 Selects SETINPUT5 Selects SETINPUT6 Selects SETINPUT7 Selects SETINPUT8 Selects SETIMPEDANCE SwitchBox SETISENSE Selects I Sense mode of the CLIOQC Ampli amp SwitchBox input 1 of the CLIOQC Amplifier amp SwitchBox input 2 of the CLIOQC Amplifier amp SwitchBox input 3 of the CLIOQC Amplifier amp SwitchBox input 4 of the CLIOQC Amplifier amp SwitchBox input 5 of the CLIOQC Amplifier amp SwitchBox input 6 of the CLIOQC Amplifier amp SwitchBox input 7 of the CLIOQC Amplifier amp SwitchBox input 8 of the CLIOQC Amplifier amp SwitchBox Selects impedance mode of the CLIOQC Amplifier amp Specific keywords are dedicated to the QCBox Model 5 these keywords have no effect in the case of earlier versions of the unit QCBOXCURRENTLIMIT Current limit A for Model 5 operation
38. 0256 GOOD UNIT N 40020256 READY Figure 19 26 This concludes our first approach to QC script writing and debugging All the files necessary to study this lesson are furnished within the My Documents Audiomatica CLIO 10 EXAMPLES MY FIRST QC folder The loop qc script is doing exactly what has just been described with a difference measurements are performed in interactive mode just load it and run it to feel the differences 19 QUALITY CONTROL 31 19 6 NOTES ON LIMITS CURVES As previously outlined the QC processor needs limits data in order to perform the required checks This data is saved within the limits files and usually represent a frequency mask for frequency response and impedance tests but they can also define a single value check like for example a Qms test When dealing with frequency checks the options defined affect the way the frequency masks are calculated the way data is displayed on screen and the way that the result is checked It is also possible to add an average or single frequency level check that concurs with the final result Fig 19 27 shows us the procedure for calculating the frequency mask after the limits file is loaded into memory You can see that the frequency data sets saved under UPPER LIMIT DATA and LOWER LIMIT DATA are treated differently if the limits are absolute or relative see 19 6 1 or if an aligned point is defined see 19 6 3 LOAD LIMITS FILE
39. 20k 68 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 1 5 PROGRAMMING THE QC SCRIPT We are ready to write the QC script the files involved are the stereo sinusoidal measurement stored inside the reference sin file the limits file for channel A in response lim and the limits file for channel B in impedance lim SIN OUTOCBOX 1V INA 10 INB 40 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM LIMITSB IMPEDANCE LIM Two things are still missing the polarity check and the visualization of the rub amp buzz curve 1 To add polarity check over the frequency response we simply add POLARITY 1 under SIN 2 To add rub amp buzz display as a third curve together frequency response and impedance we add RUB BUZZ DISPLAY in the response lim file The final script will thus be SIN OUTOCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RBSPONSB LM LIMITSB IMPEDANCE LIM POLARITY 1 This script may now be saved as faststereosweep qc The final response lim file will be RELATIVE FREQUITTER 0 16 SENSITIVITY UPPER 109 LOWER 103 UPPER LIMIT DATA 20 10 80 LO 100 e 5000 3 6000 5 20000 9 LOWER LIMIT DATA 20 0 80 10 100 9 5000 3 6000 5 20000 THD UPPER LIMIT DATA 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 69 Sal 692 06 TAO che do IDOL SUN OZ 603 03 FS LO 10869790 S PAS 10869790 64 25 LRUBTBUAA DISP
40. 7 4 STATISTICAL INFORMATION ON MEASURED DATA Statistical information characterizing the production can be obtained by CLIO using the STATISTICS keyword under GLOBALS CLIO will save under the report directory the following files One file named data_table txt with statistical information on all the measured parameters One file named avg_testnumber txt for each response test defined containing the average response for that test One file named sdmax_testnumber txt for each response test defined containing the average response plus twice the standard deviation for that test One file named sdmin_testnumber txt for each response test defined containing the average response minus twice the standard deviation for that test 19 QUALITY CONTROL 49 The statistical files keep track of the all the units saved within a batch even if the production is stopped and then restarted Let s now see what the data_table txt looks like supposing the same case of 19 7 2 after two tests we would have the following SN Voltage THD LOE Oa PTS 0006 LOZ Oe PES SOS Avg 0 775 0 006 SDMax 0 776 0 006 SDMin 0 775 0 006 The other response files representing average and standard deviation curves may be imported within each control panel with the Import feature recallable with Shift F3 19 7 5 SERIAL NUMBER MANAGEMENT There are several ways to handle the serial numbers of your devices and to maintain their coherence throug
41. D CALCULATE OPTIONAL OPTIONAL PARAMETERS LOOP PERFORM MEASUREMENT READY FOR NEXT OUTPUT Figure 19 12 To understand this operation we must define two files the Reference File and the Limits File these files are the heart of the QC operation together the QC Script they contribute to define all the parameters of the single measurement 19 3 1 THE REFERENCE FILE The Reference File is a standard CLIO measurement file extension mls fft sin or met created within its relative menu it contains most of the settings needed to fully configure your measurement Just as CLIO resets the measurement control panel to the settings of the file loaded from disk the QC processor does the Same job in this easy but effective way of operating you will be sure that for example the sampling frequency of your QC MLS measure will be the one you chose or the display settings will be the same as when you saved the reference file And all this is defined inside the QC script with a single text line REFERENCE myreferencefile mls where we imagined that you gave the name myreferencefile to a saved MLS measurement One very important setting stored within the reference file is if the measurement is mono only channel A acquired or stereo channel A and B acquired simultaneously 19 3 2 THE LIMITS FILE FOR SINGLE CHANNEL MONO OPERATION When you have taken a single channel mono measurement you define only one limi
42. D Level 0 14dB r GOOD Polarity Input A 50 tt 119 1 24Rows 80 Cols VT100 You notice now that the result is detailing all the three checks that the MLS measurement has done response global level and polarity The example details how to execute a measurement single commands can also be sent that perform all standard operations To close the channel A in out loop simply send CLIO the following SETLOOPA In the above example CLIO is behaving as a server and is visible on the Windows Desktop It is possible to hide CLIO from end user sending the command HIDECLIO 90 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE CLIO will disappear and remain minimized in the Windows application bar to see CLIO again send SHOWCLIO 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 91 20 3 4 NOTES ABOUT QC SERVICES The Quality Control operation when requesting TCP services differs from the normal condition when the QC Script processor is active In this case many tasks are handled by the client application that is requesting the services and are not performed by CLIO for example there is no serial number management The main difference is that no QC test formed by various single measurements is defined and managed by CLIO like in a QC script the TCP server can be configured and then executes endlessly all the commands and measurements it is requested to
43. ETMUTEB Switches mute for channel B on 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 111 SETPHANTOM Switches phantom power on SETPHANTOMA Switches phantom power for channel A on SETPHANTOMB Switches phantom power for channel B on 20 4 6 OTHER KEYWORDS SNINPUT Prompts the user for serial number input STOP Immediately stops the script execution 112 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 4 7 KEYWORDS USED IN LIMITS FILES ABSOLUTE Defines an absolute limit file This is also the default condition when the RELATIVE keyword is not specified FLOATING If present forces floating limits curves RELATIVE Defines a relative limit file PERCENT 1 Interprets limit curves values as percentages 0 Does not interpret limit curves values as percentages Defaults to 0 FREQJITTER Value expressed in fractions of octave used to calculate the relative limit curve It is useful to correct false negatives given by steep reference curve behaviour LEVEL Starts a section defining a check on the mean level of the measured curve ALIGNFREQ Align frequency for the mean level check Valid only when ALIGNLEV is specified and it is not ALIGNLEV REFERENCE See below ALIGNLEV Align level for the mean level check If it is specified as ALIGNLEV REFERENCE then the mean level check is against the average level of the reference in the band defined by the freque
44. LAY RUB BUZZ UPPER LIMIT DATA Sed LIZ aS AS 16 445 16 60 49 L692 02 D933 SIZE OO SUELES The final imedance lim file will be RELATIVE PERCENT 1 UPPER LIMIT DATA 20 20 20 20 60 30 90 30 100 20 200 20 1200 20 LOWER LIMIT DATA 20 o 50 ao 60 30 90 3 0 100 AS 200 AS 1200 SAA TSPARAMETERS PERCENT 1 DIAMETER 10 REDC KNOWNMMD 5 FSUPPER 10 FSLOWER 10 OMSUPPER 10 OMSLOWER 10 ZMINUPPER 10 ZMINLOWER 10 70 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 1 6 RUNNING THE QC TEST Running the complete QC test we will obtain a comprehensive graph display as in figure He tL _ N i A Response GOOD O A_RUB BUZZ GOOD A_THD GOOD A _Sensitivity 106 59dB GOOD __ _ 8_Response GOOD A 8B _Oms 6 127 GOOD MC ys A 8_Fs 68 88Hz GOOD pal TV AL TY B_Zmin 7 75 GooD Y UNT N 4 GOOD 11 54 48 5 0 1 GOOD SIN lt r A Response GOOD A A RUB BUZZ GOOD wa Mase A_ THD GOOD m O A_Sensitivity 106 594B GOOD ATINSE 20 100 200 500 1k Hz 5 120 0 dBSPL 100 0 UNT N S GOOD 12 05 12 1 GOODSIN JH cali 7 E T T y 20 1 7 ADDING THE INTERFACE TO AUTOMATION To manage TTL signals that connect the system QCBox Model 5 digital I O port to the external automation we must include some programming inside CLIO and inside the QC script As we have chosen input Bit 2 to trigger the QC test we must set this inside CLIO
45. LIFIERSSWITCHBOX CONTROL cc ccce cece eee ee eens 53 19 0 EXTERNAL TRIGGER total enannrnnmnus em a ra 54 197335 TTESIGNALS GENERATION cara 54 19 90 LIME DELAYS GENERATION cura ss 57 19 8 7 PARALLEL PORT SIGNALS MANAGEMEN Pierres ea eaaa 58 19 8 8 QCBOX MODEL 5 DIGITAL I O SIGNALS MANAGEMENT 05 59 19 8 9 R gt 232 SERIAL PORI CONTROL s 60 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE ccccscccccneeecceeeeeeeeeeeeeeneeeeeeeeeeeeee OL 20 1 A COMPLETE FAST SINGLE TEST LOUDSPEAKER QUALITY CONTROL 61 20 4A HARDWARE REQUIRED cast aster eanisne ia oa 61 20 1 2 MEASURING THE REFERENCE FREQUENCY RESPONSE 63 20 1 3 MEASURING THE REFERENCE IMPEDANCE RESPONSE nacca 66 201 4 INTEGRATING THE QC REFERENCE FILE rad 68 20 125 PROGRAMMING THE OC SCRIPT merri borini 69 20 16 RUNAENS TAHE OC IES Darrena a ziss 71 201 ADDING THE INTERFACE TOMAUTOMAIION cria 71 202 OC EXAMPLES sio cos 73 20 2 1 EXAMPLE 1 QC OF A MICROPHONE PREAMPLIFIER 73 20 2 2 EXAMPLE 2 THE AMPLIFIER amp SWITCHBOX UNDER QC ceeee eee ees 76 20 2 3 EXAMPLE 3 A TEST ON A STEREO ELECTRONIC EQUIPMENT 78 20 2 4 EXAMPLE 4 A CYCLIC SCRIPT USED TO MANAGE MY ROGERS LS3 5A TWO WAY LOUDSPEAKER PRODUCTION ccccceceee cece eee eeeeeeeee eee eeeeeennaas 79 20 2 5 EXAMPLE 5 QUALITY CONTROL OF A TELEPHONE WITH LOUDNESS RAVING CEE CR A Aa EA 82 20 2 6 EXAMPLE 6 ON RUB BUZZ DETECTION 1 cece
46. ONTROL BATCH My Batch DATE 06 06 02 INITIAL SN 101 TOTAL TESTS 2 GOOD 2 BAD 0 Peo REPORT UNIT N 102 GOOD 6 46 24 il GOOD MLS Response GOOD C Program files Audiomatica CLIOpci Data My gc My Batch LO cals 2 GOOD MET Voltage 0 775Vrms GOOD THD 0 006 GOOD C Program files Audiomatica CLIOpci Data My gc My Batch 102 2 met UNIT N 101 GOOD 6 46 19 i GOOD MLS Response GOOD C Program files Audiomatica CLIOpci Data My gc My Batch 101 1 mLs 48 19 QUALITY CONTROL 2 GOOD MET Voltage 0 775Vrms GOOD THD 0 006 GOOD C Program files Audiomatica CLIOpci Data My gc My Batch 101 2 met The files serialnumber txt describes the single QC test and look like this 1 GOOD MLS Response GOOD 2 GOOD MET Voltage 0 775Vrms GOOD LHD 0 0063 GOOD 06 06 02 6 46 24 UNIT Ne 102 GOOD 19 7 3 AUTOSAVED DATA FILES Again supposing we are in the situation of the preceding paragraph let s see how data files are saved As it can be seen from the report files our QC test consists of a MLS and a Multimeter measurement As the MLS test is defined before the Multimeter inside the script then it assumes number 1 as single QC test while the Multimeter test assumes number 2 this is already clear from the report files above After two units tested we find the following measurement files 101 1 mls 101 2 met 102 1 mls 102 2 metl As you see the QC single test numbering is integral part of the name of the autosaved data file 19
47. ORM MEASUREMENT REPORT STATISTICS QC TEST MEASUREMENTS amp BATCH BAD NO MANAGEMENT YES QC TEST ALL RESULTS GOOD GOOD Figure 19 10 You can see the operation of loading the QC script from disk that begins our quality control session then CLIO waits for that the user or an external trigger for example a TTL signal from the automation controller to give the actual start to the QC test the measurements defined are then executed in sequence until the last is reached the result of the test is given by the sum of all the checks done inside the test sequence it is only good if all checks gave a positive result the QC test ends by updating the report and statistics while managing the production batch the next device can then be put under test To proceed further it is advisable to go into the former block diagram in greater detail this is done in Fig 19 11 and 19 12 Fig 19 11 zooms the entire QC test sequence adding the blocks in red while Fig 19 12 zooms the Perform Measurement single block the blue one Three different operating modes are outlined here the DISPLAY mode the INTERACTIVE mode and the DISPLAYONBAD mode If none of these modes are active the QC test proceeds without any measurements shown with simple go no go masks as in Fig 19 1 If DISPLAY mode is active then the executed measurements are shown and remain on the screen for a definable amount of time the test automatically procee
48. Ranges from O to 10 QCBOXDCOUT DC voltage V to be output by Model 5 superimposed to generated signal Ranges from 20 to 20 QCBOXINITIALBYTE 8 BIT binary value that will be output from Model 5 port at startup before QC script execution QCBOXOUTBITO Status 1 or O of the bit that will be output from Model 5 BITO QCBOXOUTBIT1 Status 1 or O of the bit that will be output from Model 5 BIT1 QCBOXOUTBIT2 Status 1 or O of the bit that will be output from Model 5 BIT2 QCBOXOUTBIT3 Status 1 or O of the bit that will be output from Model 5 BITS QCBOXOUTBIT4 Status 1 or O of the bit that will be output from Model 5 BIT4 19 QUALITY CONTROL 53 QCBOXOUTBIT5 Status 1 or O of the bit that will be output from Model 5 BIT5 QCBOXOUTBYTE 8 BIT binary value that will be output from Model 5 port QCBOXPHANTOM Microphone power supply voltage V set for Model 5 IN1 and IN2 input Ranges from 2 to 24 19 8 4 EXTERNAL TRIGGER It is possible to trigger the QC tests sequence with the following 1 A foot pedal switch connected to QCBox Pedal In connector 2 The connection of the loudspeaker under test sensed by QCBox Model 5 3 An external TTL signal wired to one of the QCBox Model 5 input 4 An external TTL signal wired to the PC parallel printer port The settings are within CLIO Options gt QC See 19 4 8 This operation is controlled by the External Trigger button in the QC control panel
49. SAGEONGOOD Text to be displayed when unit performs good If omitted defaults to GOOD NOREPORTSAVED 1 No production report files are saved See 19 7 2 0 The report information is saved If omitted defaults to O OPENSERIAL Opens the QC COM port for serial communication See 6 3 6 for RS 232 settings See also SERIALMONITOR OUT Sets the generator output level with OUTUNITS defined under GLOBALS OUTQCBOX Sets the generator output level taking into account QCBox gain with OUTUNITS defined under GLOBALS This is the level that will be 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 99 present at QCBox output OUTUNBALANCED 1 Consider output level settings as unbalanced 0 Consider output level settings as balanced If omitted defaults to balanced output OUTUNITS Sets the unit of measure of the output level It is possible to set dBu dBV or V If omitted defaults to dBu PHANTOM 1 Switches phantom power supply on 0 Switches phantom power supply off If omitted defaults to 0 Valid trough all the QC test sequence PHANTOMA 1 Switches phantom power supply for channel A on 0 Switches phantom power supply for channel A off If omitted defaults to 0 Valid trough all the QC test sequence PHANTOMB 1 Switches phantom power supply for channel B on 0 Switches phantom power supply for channel B off If omitted defaults to 0 Valid trough all the QC test sequence PROMPTFORGOOD 1 Prompt
50. a Pa Pi Ja L om E 5 S8MB El My Computer Figure 19 9 19 QUALITY CONTROL 9 19 2 4 OPERATORS AND PASSWORDS MANAGEMENT CLIOQC is capable of implementing a basic management for limiting operators access to QC functions Operation is controlled under CLIO Options gt QC Operators amp Passwords CUO Options General Graphics Hardware WC Operators amp Passwords Password Protected QC Operations W Enable Operators amp Passwords Operator Type Password Re Type Password set Operator amp Password DE Files Digital signature Ww Enable Cancel It is also possible to digitally sign the quality control script to prevent users to manipulate it without permission ENABLING PASSWORD PROTECTED OPERATIONS The QC processor has two default built in operators and relative passwords name password MASTER 000000 USER1 useri To enable password protected operation you should invoke the CLIO Options dialog and access the QC Operators amp Passwords tab Click on Enable 10 19 QUALITY CONTROL Input Password Operator MASTER Password EA Caneel You will be prompted to access as MASTER operator The MASTER operator is the only entity to have full capability over all QC functions It is the only operator that cannot be deleted It is advisable to change its default password as soon as possible Inside CLIO Options it is possible to define new operators and relative
51. akers The hardware setup is shown in figure INPUT A INPUT B CLIO OUTPUT A OUTPUT B gt Mic No 1 S Mic No 2 From CLIO 4 CLIOQC Ampli SwitchBox ISense To CLIO Speaker far field near field As you can see we employ a CLIOQC Amplifier amp SwitchBox that connects two measuring microphones one for near field response and the other for far field response The internal switcher is used to configure impedance with current sensing or frequency response measurements and to select the correct microphone The quality control of such a production relies on what is called a reference loudspeaker i e a unit which is kept aside the line and retested regularly to give reference data curves for the units under test These data trace environmental conditions To accomplish the recurrent operation of testing the reference loudspeaker CLIO QC implements what is called the cyclic script i e a QC script that is launched by the main script on a timed basis and executed once When the cyclic script is launched the operator is prompted and the reference unit must be placed on the line The three keywords used to define this operation are CYCLIC REPETITION and CYCLICFIRST under GLOBALS CYCLIC defines the name of the cyclic script this file must reside in the same directory of the calling one REPETITION defines after how many units it is run we put 4 in the example only to allow you to test it this number is chosen after evaluating th
52. at control more than one QC test workstation 20 3 1 INVOKING THE QC SERVER To invoke the CLIO quality control server simply run CLIO passing it the TCP parameter You may define a shortcut with the following target program C Program Files Audiomatica CLIO 10 Clio exe TCP CLIO will run and start listening on the port defined in the CLIO Options gt QC settings dialog see also 19 4 8 being port 1234 the default one OIC TCP server settings Port 1234 Cancel The CLIO desktop will also show this particular operating condition in the main toolbar ST at H From this moment it is possible to connect to CLIO and receive the various measurements services that it is capable of 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 87 20 3 2 CONNECTING TO THE QC SERVER It is possible to connect to the CLIO QC server with any custom written client application that opens a TCP socket we will see an example later or with a standard telnet application like Microsoft Telnet The connections parameters are hostname Network name of PC or localhost for same PC port CLIO TCP port default 1234 Let s see how to connect a telnet client application we will use CRT 3 4 run in the Same computer where CLIO resides LI not connected CRT Quick Connect Protocal ltelnet Hostname localhost Port 1234 Use firewall to connect Show quick connect on start up W Save s
53. c batch naming The name of the production batch is set equal to the current name of the folder where the QC script is saved SCRIPTDIR 0 Does not perform autobatch If omitted defaults to O AUTOREPEAT n Number of QC tests to be executed continuously without operator assistance After pressing Go the QC processor will execute n tests and then stop AUTOSAVE 1 Autosaves all measurements Applies to all measurements 0 Does not perform autosave If omitted defaults to 0 AUTOSN 1 Automatically manages and increments an 8 digits numerical serial number 0 Permits a 24 alphanumeric serial number to be fed to the QC processor no automatic increment is performed If omitted defaults to 1 i e automatic serial numbering AUXMONITOR 1 Activates the math operation monitor panel during QC execution 0 Does not activate the math operation monitor panel If omitted defaults to O BATCH Name of the production batch See also AUTOBATCH and SAVEFOLDER CYCLIC Name of the cyclic script The cyclic script is executed every REPETITION times instead of the actual script All measurements executed inside the cyclic script do not take part in production report batch management and serial numbering See also CYCLICFIRST CYCLICFIRST 1 Executes the cyclic script before executing the QC test itself If omitted defaults to O i e no cyclic script executed first Refer also to CYCLIC and REPETITION for defining the cyclic script behavior
54. check mask may be defined as follow RELATIVE PERCENT 1 UPPER LIMIT DATA 20 20 50 20 60 30 90 30 100 20 66 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 200 20 1200 20 LOWER LIMIT DATA 20 U 50 20 60 30 90 30 IOO 20 200 ZU 1200 U This 20 wide mask spans from below resonance to slightly higher the ZMin region and opens up to 30 in resonance region I QA M DOBAOBOADBOBOFAOABOAO Tomo e Co wet TU EE ET EE A UI ee lee wo NT EE ET ANIOS ee ee ot TNE EE ET ET TINE EEE a o TWENTE A eS A 20 50 100 200 500 1k 2k Hz 5k 10k 20k The most important QC checks will be done on T amp S parameters that take into account all possible defects from the impedance point of view In this definition we check Fs Qms and ZMin to be within 10 from reference TSPARAMETERS PERCENT 1 DIAMETER 10 REDC KNOWNMMD 5 FSUPPER 10 FSLOWER 10 OMSUPPER 10 OMSLOWER 10 ZMINUPPER 10 ZMINLOWER 10 It is time to save the limits file as impedance lim 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 67 20 1 4 INTEGRATING THE QC REFERENCE FILE Starting from the actual situation i e having just measured impedance relying on settings that accumulated from the previous frequency response measurement we are now ready to integrate all of our work to realize a single stereo sinusoidal measurement that will be the reference for our QC script Go to the sinusoi
55. cify only one fixed parameter KNOWNMMD Input value for the fixed Mmd parameter It is needed only when testing Cms Mms Mmd Bl Vas dBSPL or ZMin KNOWNMMS Input value for the fixed Mms parameter It is needed only when testing Cms Mms Mmd Bl Vas dBSPL or ZMin KNOWNCMS Input value for the fixed Cms parameter It is needed only when testing Cms Mms Mmd Bl Vas dBSPL or ZMin FSLOWER Lower limit for Fs FSUPPER Upper limit for Fs QELOWER Lower limit for Qes QEUPPER Upper limit for Qes QMLOWER Lower limit for Qms QMUPPER Upper limit for Qms QTLOWER Lower limit for Qts QTUPPER Upper limit for Qts CMSLOWER Lower limit for Cms CMSUPPER Upper limit for Cms MMSLOWER Lower limit for Mms MMSUPPER Upper limit for Mms 114 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE MMDLOWER Lower limit for Mmd MMDUPPER Upper limit for Mmd BLLOWER Lower limit for BI BLUPPER Upper limit for BI VASLOWER Lower limit for Vas VASUPPER Upper limit for Vas DBSPLLOWER Lower limit for dBSPL DBSPLUPPER Upper limit for dBSPL ZMINLOWER Lower limit for ZMin ZMINUPPER Upper limit for ZMin LR Starts a section defining a loudness rating check PERCENT 1 Interprets limit values as percentages 0 Does not interpret limit values as percentages Defaults to O RLRLOWERLower limit for RLR RLRUPPER Upper limit for RLR SLRLOWER Lower limit for SLR SLRUPPER Upper limit for
56. cks one is the frequency behavior of the measurement compared against the frequency mask the second is a sensitivity check which compares the sensitivity of the measured curve with the defined upper and lower limits It is possible to calculate sensitivity at discrete frequencies up to eight and average them together SENSIELVITY FREQ1 500 FREQ2 1000 FREQ3 2000 UPPER 102 LOWER 100 DE MLS Response GOOD Sensitivity 101 84dB GOOD CIES USED TQ pl S als 40 Eta NAT fo ae ipinia DS MLS Response GOOD Sensitivity 101 84dB GOOD 19 QUALITY CONTROL 19 6 5 FLOATING LIMITS VS FLOATING CURVES When an average or single frequency level check is defined 19 6 2 or 19 6 3 it is possible to define floating limits instead of floating curves using the FLOATING keyword RELATIVE FLOATING LEVEL UPPER 3 LOWER 3 UPPER LIMIT DATA 200 5 300 2 10000 Z 15000 5 LOWER LIMIT DATA 200 o 300 2 TODO 2 15000 o In this case the measured curve is presented on screen with correct values while the limits curves are moved around it 19 QUALITY CONTROL 41 19 6 6 SINUSOIDAL A B STEREO DIFFERENCE CHECK When executing a stereo sinusoidal frequency response measurement it is possible to activate quality control checks over the calculated difference between the two channels The display is possible only for one curve chosen among the pool of the curves calculated within a single sinusoidal test
57. cript file that is executed regularly after a certain number of QC tests have been executed this is useful for retesting reference quantities that characterize the entire process and maintain traceability to environmental conditions The typical example is the reference loudspeaker tested every 100 production units have passed the QC test LOAD QC SCRIPT SHOW MEASUREMENT IF DISPLAY WAIT FOR USER MANAGE MODE OR TRIGGER TO PERFORM AUTOSAVE OR RESULT START QC TEST MEASUREMENT AUTOEXPORT GOOD SHOW AND PROMPT IF INTERACTIVE YES MODE EXECUTE SHOW CYCLIC SCRIPT MEASUREMENT IF TIME TO DISPLAYONBAD a TAKE USER STATISTICS E eee ACTIONS ee CONDITIONED BY THE RESULT OF THE SINGLE a N a S MEASUREMENT TAKE USER a IESI DEFINED BAD ACTIONS NO CONDITIONED BY Se E QC TEST ALL RESULTS ey yo MEASUREMENTS GOOD MEASUREMENTS J GOOD wee Ne y Figure 19 11 14 19 QUALITY CONTROL The third diagram in Fig 19 12 shows us how the single QC measurement is performed As outlined before CLIO QC relies on the measurements present in the standard version of the software the possible measurements within QC are MLS MLS FFT FFT Sinusoidal SIN and Multimeter MET We will now cover the keywords which are used to define the tests inside the script INPUT LOAD EXECUTE SET QC LOAD LIMITS REFERENCE OPTIONS FILE FILE MEASUREMENT BA
58. cycle times of 1 to 2 seconds with a sweep time of around is 20 1 1 HARDWARE REQUIRED The following parts of the CLIO system are needed to achieve this kind of QC test CLIO FW 01 QCBox Model 5 Microphone MIC 01 02 or 03 Optional 19 rack QC panel The CLIO system hardware presents itself as in this picture e o a E 0 j CLIOQC a g W ais 009 a gt e D Os Gy aa Ds OT e Qe a The basic connections required are listed here 1 On the electro acoustic side we find the QCBox used as power amplifier microphone directly connected to CLIO current sensing to channel B input to measure impedance 2 On the digital side we find the connection with an external automation that gives a TTL start signal to the QC test and is informed by three output bits of its current Status 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 61 of To Automation QCBox Model 5 IM In2 m Im NA INB OUTA OUTB Mic Y Speaker 3 On the loudspeaker under test side a suitable acoustic test fixture should be setup to properly isolate from the outside environment The example is not dealing with this topic To properly control the QCBox Model 5 verify its settings within the QCBox amp LPT Controls dialog default settings i e 2A output current limiting should be OK for many DUTs OCBox amp LPT Controls OCB ox Model 5 Controls a o 0 0 y g IN 3 DC Popii IN 4 DC i f
59. dal menu have the impedance measurement loaded in memory select CHA amp B with the input selector change the Y Scale unit to dBSPL CLIO is now ready to take a two channels measurement with main unit set to dBSPL as the measured unit for channel B needs to be Ohm we must open the sinusoidal settings dialog and select Ohm Right Scale in this way channel B will measure impedance using the right scale to identify it The final sinusoidal settings are Sweep Gating Impedance Stepped Gated e Ohm Right Scale Delay ms f Internal 0 180 f QC Box Select Resolution 1 12 Octave Freq Wax Hz 15000 J Auto Delay jw AB Enabled W THD Enabled Freq Min Hz Auto Del Freg Hz 30 E 110000 Rise dB 10 000 Save Settings i Press Go the graph obtained has frequency response measured from channel A and refers to left scale while impedance response comes from channel B referring to right scale Note that the two curves displayed are measured and controlled by dedicated checkboxes no overlays are active aver clas as oa cos ag oda aA 120 0 dBSPL AAA i AE f EE EE UNA 20 0 CE A This measurement is OK to be the reference for our QC test once the frequency scale Y right and left scales are OK for the visualization under QC it can be saved as reference sin To properly set scales it is useful to directly input values at their extremes refer to 6 2 and 6 4 for details about this 0 k 10k
60. do it has no knowledge of how many single measurements form a complete QC test TCP Operation and Server messages When dealing with a network service like the CLIO TCP server the client application receives back answers for each text command sent We find the following server responses 200 Start Command OK Usually given when a bracketed keyword is sent 200 Additional Command OK Usually given when a keyword defining a section is sent 400 Unknown Command 400 Unknown Additional Command 200 OK Given when a command not a measurement is executed 200 GOOD Global result given at the end of a measurement 200 BAD Global result given at the end of a measurement 200 GOOD Response 200 GOOD Polarity etc etc Single results given at the end of a measurement Note the particular syntax of these answers They are all initiated by a number that is related to network operation and gives information about the correct interaction between client and server We find 200 Correct 400 Usually an error is occurred Autosaving During TCP operation the QC single test numbering is disabled and does not take place in defining the name of the autosaved data file see 19 7 3 If autosaving is active CLIO will give the following names to files tcpresponse txt measurements exported in ASCII tcpresponse mls MLS measurements tcpresponse sin Sinusoidal measurements tcpresponse fft FFT measurements tcpresponse met Multimeter measurements
61. ds until the end Fig 19 2 depicts such a situation 19 QUALITY CONTROL 13 If INTERACTIVE mode is active the executed measurements are shown and then the software prompts for user input The test sequence is not continued until the user executes a particular action or actions It is also possible to loop certain measurements for D U T tuning see Fig 19 12 Fig 19 3 depicts such a situation If DISPLAYONBAD mode is active then the executed measurements are shown only if their result is not satisfactory The sequence is stopped for user acceptance Fig 19 11 shows also the Autosave management which is of great importance for controlling the production and for characterizing a batch This feature is completely user definable allowing for binary or text files operation conditioned by the test result coherence with serial number and single test number the operator can also be prompted for file name input Two blocks are devoted to the execution of particular actions conditioned by the result of the single test or the result of all tests Among these we find messages to the operator printout of the measurement execution of custom written software generation of TTL signals to manage automatic lines pause for a predefined amount of time stop the sequence The last red block right before the end of the QC test represents the Cyclic Script The cyclic script is a particular sequence of QC operations described and saved in a s
62. e li zj 1 Input A deis A OdBV a y pub dfs A OdBV a v a8 Gh Out 15 0dBu a BHM 84 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 2 7 EXAMPLE 7 ON RUB amp BUZZ DETECTION 2 This example describes a simple method to enhance rub amp buzz detection This method is based on the possibility of applying a DC voltage superimposed to the generated stimulus This technique applies to any test possible with CLIO and augments its sensitivity As it is evident also from the figures in 19 9 7 the maximum excursion is obtained at DC and this is an effective way to bring the speaker to its limits As it is evident from the following figure when a DC is applied the corresponding AC signal amplitude must be lowered to obtain similar excursion Applying a DC to the same QC test as described before in 19 9 8 it is possible to obtain the following measurement where it is evident the much better detection of the defect which is possible 140 0 dBSPL 120 0 100 0 80 0 A a IN A A 7 Wa Lino dd As described in 4 6 1 it is possible to manually set the DC voltage at the output of a QCBox Model 5 using the relative control panel 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 85 OCBox amp LPT Controls QCB ox Model 5 Controls allow 2 2 IN 3 DC al A IN 4 DC 2 0 A Out
63. e in term of a O dB at 1kHz The absolute level at 1kHz is however left to the test procedure As we want to perform the test near the highest level the device is able of accept we need to use the PROCESS feature to shift the real measurement to the specs level 3 Changes in switch position are required during test We have therefore to use the INTERACTIVE feature 4 A level regulation is required to align the gain at 1kHz with and without a filter This brings in the LOOP feature of the MET multimeter test 5 It s very difficult for the operator to set a switch accordingly to the next test to be performed The PERFORM and MESSAGE feature greatly simplifies this avoiding errors The QC script described here with comments allows the check of the filters response against Type 1 tolerance specification It also checks for 0 2 dB gain tolerance of the gain switch in both positions As an additional feature it allows the user within the test to adjust a variable gain trimmer that has to be adjusted to achieve optimum levels this procedure LOOP also ends with a check of the adjusted level to be within 0 2 dB At every level check a distortion test THD defined in the LEV1 LIM file is performed As a general rule a QC procedure is defined from one QC file qc extension and several limits file lim extension declared in the qc file Process files mpro or spro are also involved here and these are the only ones not specifically
64. e particular condition of the production line CYCLICFIRST which in the example is commented away tells the software to execute the cyclic script before the first run of the main script this is useful to set known conditions at the beginning of a QC session GLOBALS 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 79 CYCHTC ROGERSCYCi2OC CYCLICFIRST 1 REPETITION 4 OUTUNITS V OUTQCBOX 2 83 IN 20 Please note the use of the OUTUNITS keyword which accounts for output levels expressed in Volts RMS With OUTQCBOX 2 83 we chose to set 2 83 Volts at Rogers terminals The rest of the main script for producing my LS3 5As deals with the three actual measurements for testing nearfield farfield and impedance data the first two are done with MLS the third with Sinusoidal Before each measurement definition are the relative commands that set the correct function of the Amplifier amp SwitchBox note that the impedance is done in ISense mode SETINPUTI MLS REFERENCE NEARFIELD MLS LIMITS NEARFIELD LIM SETINPUTZ MLS REFERENCE FARFTELD MLS LIMITS FARFTELD LIM SETISENSE SIN OUTOCBOX 1 IN 30 REFERENCE IMPEDANCE SINI LIMITS IMPEDANCE LIM The main QC script ends here It is a fairly simple one which can be customized for any production of loudspeakers Let s now see the cyclic script The basic idea is to execute the same measurements as in the main script and save them with the names of t
65. e resonant frequency Fs to achieve excursion while the stop frequency should be high enough to stimulate all possible defects and anomalous mechanical contacts We suggest start to lie between 20Hz 100Hz while stop between 500Hz 1500Hz Stop should be a compromise between best defect detection and anomalous resonances excitation Amplitude Perhaps this is the most critical parameter to set Its choice must take into consideration T amp S parameters of the device and tend to exploit the maximum excursion possible XMax On the other side a too high stimulus amplitude will tend to give false positives to R amp B The graph below shows excursion normalized versus Qt and Fs it tells us that in free air as it is usually the case of production lines maximum excursion is reached well below Fs around 0 1 Fs This leads us also to consider the technique described after 19 9 9 to apply DC and relax other parameters while augmenting R amp B detection Duration It is directly related to the chirp length at 48 kHz sampling you get the following a 16k chirp lasts around 0 35s a 32k chirp lasts around 0 7s a 64k chirp lasts around 1 4s and so on The choice should be consistent with your production test needs provided a longer test should be preferable as some kind of R amp B phenomena appea
66. ecceee eee e eee eens 83 20 2 7 EXAMPLE 7 ON RUB amp BUZZ DETECTION 2 cece ecceeee eee e eee es 85 20 3 CLIO OCG TCP IP SERVER 87 20 3 4 INVOKING THE OC SERVER rta 87 20 3 2 CONNECTING TO THE OC SERVER cocinas 88 203 3 INTERACTING WITH THE QC SERVER ninia 89 70 3 4 NOVES ABOUT OC SERVICE Si 92 20 3 5 KEYWORDS FOR OC SERVICES aaa das 94 20 3 6 TCP SERVER EXAMPLE A C CLIENT APPLICATION occa 95 20 F OC SCRIPT SANTAS REFERENCE sia TE 98 204 1 KEYWORDS FOR GENERAL SETTINGS ii aioe eaeteseeiaeies 98 20 4 2 KEYWORDS FOR MEASUREMENTS SET TINGS aa 103 20 4 3 KEYWORDS FOR AUXILIARY TESTS AND MATH OPERATION 106 20 4 4 KEYWORDS FOR CONDITIONAL EXECUTION cc ccc eeee eee e eee 107 20 4 5 KEYWORDS FOR HARDWARE CONTROL 00ccceeee cess eee eee eeene nena 111 20A O OTHER KEYWORD Sia 112 204 7 KEYWORDS USED IN LIMITS FILES oratoria 113 BIBLIOGRAPHY Mia LS 19 QUALITY CONTROL 19 1 INTRODUCTION The Quality Control software extension for CLIO is a powerful suite for executing state of the art production line testing CLIO QC implements all the measurement techniques found in the CLIO standard software adding a versatile script processor that handles the test sequence most appropriate for your needs CLIO QC is able to test the production of loudspeakers drivers microphones amplifiers and any other electroacoustic device CLIO QC can interact with external hardware or production line controllers
67. eck The frequency mask has to be defined as a list of N couples like Frequency_i Value_1 Frequency_N Value_N It is possible to load frequency data from an external ASCII text file using the FILE keyword FILE Name of a text file containing a frequency mask definition A B DISPLAY 116 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE RUB BUZZ DISPLAY THD DISPLAY n HARMONIC DISPLAY n may range from 2 2nd harmonic to 10 10th harmonic Defines which curve of the calculated ones will be displayed it is possible to display only one curve REFERENCE DATA Start a section containing the frequency response used as reference if present substitute data taken from the reference file as defined in 19 3 The frequency mask has to be defined as a list of N couples like Frequency_i Value_i Frequency_N Value_N It is possible to load frequency data from an external ASCII text file using the FILE keyword FILE Name of a text file containing a frequency mask definition 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 117 BIBLIOGRAPHY 1 Joseph D Appolito Testing Loudspeakers Audio Amateur Press 1998 2 J M Berman and L R Fincham The Application of Digital Techniques to the Measurement of Loudspeakers J Audio Eng Soc Vol 25 1977 June 3 L R Fincham Refinements in the Impulse Testing of Loudspeakers J Audio Eng Soc Vol 33 1985 March 4
68. efaults to O i e persistent color REPETITION Number representing the frequency of execution of the cyclic script SAVEBINARY 1 saves also in binary format if SAVETEXT 1 Ignored if used alone Applies to all the measurements If omitted defaults to 0 Remember that if neither SAVETEXT nor SAVEBINARY are specified the default format is binary SAVEFOLDER Forces the name of the autosave directory If omitted the default autosave directory is SCRIPTDIR AUTOSAVE if no batch name is defined otherwise it is SCRIPTDIR BATCH where BATCH is the name of production batch If you desire to save files in the script directory itself use the particular syntax SAVEFOLDER i e leave blank the right part SAVEONGOOD 1 Autosaves all measurements if global result is good Applies to all measurements 0 Does not perform autosave If omitted defaults to 0 If you want to autosave also in case of bad measurement add the keyword SAVEONBAD 1 under GLOBALS SAVEONBAD 1 Autosaves all measurements if global result is bad Applies to all the measurements 0 Not active If omitted defaults to O Refer also to SAVEONGOOD and AUTOSAVE SAVETEXT 1 saves ASCII file instead of binary format Applies to all the measurements 0 saves files with normal binary format If omitted defaults to 0 SERIALMONITOR 1 Activates the RS 232 monitor panel during QC execution 0 Does not activate the RS 232 monitor panel If omitted defaults to 0 STARTSIGLOGIC
69. ession coca 24 Rows 80Cols WT100 As soon as the connection is invoked the CLIO QC server will answer with the welcome greeting localhost CRT File Edit View Options Transfer Script Window Help EPRI EIEEE reems to Clio 8 UL Remote Server The connection is established QC services are ready for you 88 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 3 3 INTERACTING WITH THE QC SERVER Your client application interacts with CLIO sending the standard ASCII script commands CLIO executes the commands and sends back the result of the measurements Let s now execute a simple MLS measurement We will use the same example of 19 5 2 My First QC Script The syntax is identical MLS OUT 0 0 IN 0 REFERENCE LOOP MLS LIMITS LOOPMLS LIM If we send these commands to CLIO we get the following l localhost CRT Fie Edit View Options Transfer Script Window Help APHID EITE helcome to Clio 8 UL Remote Server CMHLS lt 00 Start Command OK OUT 0 0 00 Additional Command OK IH 0 00 Additional Command OK FEFEREHCE LOOF MLS 00 Additional Command OK LIMITS LOOPMLS LIM 00 Additional Command OK You can see how the data exchange takes place After each line of command is sent the server sends back an acknowledgment stating that the command has been received and that it is ok At this time the sequence has not been closed yet and the measurement has not been done The
70. frequency level Sensitivity average or up to eight frequencies Polarity Total harmonic distortion response Single harmonic response from 2nd to 10th Fast Track Rub amp Buzz response T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin Loudness Rating RLR SLR STMR MLS amp CHIRP Frequency response or impedance response mono tests Average or single frequency level Sensitivity average or up to eight frequencies Polarity T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin Loudness Rating RLR SLR STMR FFT Frequency response with definable stimulus mono tests also 16 19 QUALITY CONTROL interactive Average or single frequency level Sensitivity average or up to eight frequencies METER SPL Volts THD IMD single parameter mono tests also interactive 19 3 3 LIMITS FILE FOR TWO CHANNELS STEREO OPERATION When you have taken a simultaneous two channels stereo measurement you may define the following limits files A One single Limits file which is valid and shared for both channels this is the case when both measurements refer to the same unit like the two channels frequency response of a headphone or of a stereo equipment A stereo sinusoidal test may be defined as SIN REFERENCE MYREFERENCEFILE SIN LIMITS MYSTEREOLIMITSFILE LIM B Two different Limits files one per measured channel this is the case when the two measurements refer to two different quantitie
71. g these keywords In the previous paragraph you can also see the possibility of mixing time delays with signals definitions in order to generate pulses 19 QUALITY CONTROL 57 19 8 7 PARALLEL PORT SIGNALS MANAGEMENT The TTL signals generated with the active parallel printer port of the PC may be interactively controlled by means of the QCBox amp LPT menu recallable with Shift F4 After opening this box press the Direct TTL Control button and you obtain the control panel shown in figure To get TTL signals operation please select a parallel port from the ones available QOCBox E LPT Controls Direct TTL Controls Output Input BitO Bra o Bird OBS o Bt2 Bike iw Bits Bie G Set Bits The Direct TTL Controls dialog lets you set the status of the eight output bits using the appropriate check boxes while triggering it with the Set Bits button a decimal representation of the output binary word is also present On the left side the status of the input start bit is reported The pin out of the standard parallel port is shown below note the eight output bits and the start trigger pulse in input yo ad a E a Ab 58 19 QUALITY CONTROL 19 8 8 QCBOX MODEL 5 DIGITAL I O SIGNALS MANAGEMENT Using the QCBox Model 5 Digitali I O port it is possible to generate monitor TTL signals to be used for interfacing along production lines these key features are controlled over the USB connection of the Model 5 so there is no need for
72. g pseudorandom noise J Audio Eng Soc 1983 July August 16 D D Rife Maximum length sequences optimize PC based linear system analysis Pers Eng Inst News 1987 May 17 C Dunn and M O Hawksford Distortion Immunity of MLS Derived Impulse Response Measurements J Audio Eng Soc 1993 May 18 R H Small Direct Radiator Loudspeaker System Analysis J Audio Eng Soc 1972 June BIBLIOGRAPHY 119 19 M O Hawksford Digital Signal Processing Tools for Loudspeaker Evaluation and Discrete Time Crossover Design J Audio Eng Soc 1997 January February 20 D Clarke Precision Measurement of Loudspeaker Parameters J Audio Eng Soc 1997 March 21 IASCA International Auto Sound Challenge Association Inc Official Judging Rules 22 A Farina Simultaneous measurements of impulse response and distortion with a swept sine technique AES Preprint n 5093 108th Convention 2000 February 23 S Mueller and P Massarini Transfer function measurement with sweeps J Audio Eng Soc 2001 June 24 T Kite Measurements of audio equipment with log swept sine chirps AES Preprint n 6269 117th Convention 2004 October 25 S J Loutridis Decomposition of Impulse Responses Using Complex Wavelets JAES Vol 53 No 9 2005 September 26 D B Keele Time Frequency Display of Electroacoustic Data Using Cycle Octave Wavelet Transforms 99th C
73. ght frequencies 19 6 4 A B difference between channels in a stereo measurement 19 6 6 Sinusoidal THD Single harmonic or Fast Track Rub amp Buzz response 19 6 7 T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin 19 6 8 Loudness Rating RLR SLR STMR 19 6 9 A frequency limit file can be applied to an MLS Sinusoidal or FFT test To define a limits file for a Multimeter measurement see later 19 QUALITY CONTROL 35 19 6 2 AVERAGE LEVEL CHECK The following limits file defines an average level check inside the same relative frequency limit shown before RELATIVE LEVEL UPPER 3 LOWER 3 FREQHT 5000 FREQLO 400 UPPER LIMIT DATA 200 J 300 2 10000 2 15000 5 LOWER LIMIT DATA 200 9 300 10000 Z 15000 5 When a level check is defined inside a limits file the QC result is actually a combination of two separate checks one is the frequency behavior of the measurement compared against the frequency mask the second is a level check which compares the average level of the measured curve with the average level of the reference The average level is calculated within the frequency extremes defined by FREQHI and FREQLO as shown in Fig 19 31a BJHMLS Level 0 09dB GOOD AMARME Figure 19 31a As default if FREQHI and FREQLO are not defined the levels are calculated averaging in the frequency band defined by the extremes frequencies of the limits Fig 19 31b sh
74. gle parameter mono tests also interactive The QC processor is able of handling a virtually unlimited sequence of tests to accomplish even the most complex tasks on the other hand a single ultra fast sinusoidal test read about it in 20 1 may ensure you production cycle times 19 QUALITY CONTROL 5 of less than 1 second with total integration with the line controller Some of the QC management features are better explained starting from the various people taking part in this complex operation and their points of view The operator working on the line 19 2 1 The quality control engineer responsible for production line operation 19 2 2 The company and its managers controlling the overall process 19 2 3 All QC operations can be password protected 19 2 4 file operation can be restricted by their digital signature 19 2 5 19 2 1 THE OPERATOR S POINT OF VIEW A quality control test can be controlled by simple Go NoGo masks letting even the least experienced operator work without problems and with no learning curve CLIO ELECTRICAL amp ACOUSTICAL TESTS AUDIOMATICA CLIO QC PROCESSOR MY COMPANY MY QUALITY CONTROL UNITN a 913Z841519M001 GOOD READY Figure 19 1 A more complex operation foresees the continuous display of the measurements executed until the reaching of the final result 6 19 QUALITY CONTROL CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help m TE
75. h all the production of one batch Two different strategies are possible with respect to serial number management 1 CLIO handles and manages an 8 digit numeric serial number This is the default operation 2 CLIO accepts a 24 characters alphanumeric serial number its management is left to the user To activate the second option use the AUTOSN 0 keyword default is AUTOSN 1 GLOBALS AUTOSN 0 SNINPUT The operator is prompted for serial number input using the SNINPUT keyword Input can be done with any kind of bar code reader It is also possible to manually input the serial number before starting the test to do this just click on the N button Under default operation AUTOSN 1 the 8 digit serial number is automatically increased after the end of the test It is possible to avoid a bad unit increasing the serial number using the INCREASEONBAD 0 keyword Set INCREASEONBAD 0 if you want only good units to have a serial number report statistical and autosave management this works also when AUTOSN 0 The operator under her or his judgment can force the final result of a bad test if the keyword PROMPTFORGOOD 1 is used 50 19 QUALITY CONTROL 19 7 6 THE SKIP LAST BUTTON When a QC test is finished it is also possible to null its result by pressing the Skip Last button All information saved with the test will be erased comprising serial number increment and statistical data The production report will mark the un
76. he final measurement will be stereo operate separately the two input channel controls releasing the Link Input Controls button in the hardware toolbar initial input A sensitivity is 10dBV channel B is left to OdBV Now within the sinusoidal menu choose CHA input channel selection and dBSPL as Y scale unit Press go The first measurement gives you the following result I QA WY OORBOFOADBOBOFOBOAO O A A E O ft T MINOR 20 100 500 10k 20k one important parameter now clear is the sweep time that is shown in the sinusoidal menu status bar with these settings we have 1 05 seconds sweep time Consider it fine Save the result to response sin file The test should now be tuned up to take into account the acoustic environment and completed with missing settings Open the sinusoidal settings dialog proper delay should be set to compensate for microphone distance to loudspeaker this may be evaluated by the two common ways CLIO gives you i e taking a trial sinusoidal measurement with auto delay active or taking a parallel MLS amp LogChirp measurement and inspecting the impulse response in our case we found a 0 2ms delay to be compensated due to a quasi near field measurement with a microphone to DUT distance in the acoustic fixture of circa 7cm Final settings required are about distortion curves we need to activate THD and Rub amp Buzz calculations clicking on THD Enabled and R amp B Enabled the Rise parameter is
77. he reference files for the main script itself AUTOSAVE 1 prepares for saving all the measurements done SAVEFOLDER is a particular syntax to set the script directory as the current one GLOBALS AUTOSAVE 1 SAVEFOLDER OUTUNITS V OUTQCBOX 2 83 IN 20 The rest of the cyclic script resembles the main script with the difference that after each measurement we define the name of the file to be saved and force it to be equal to the name of the reference file in this way the reference file itself is updated SAVEPROMPT 1 instructs the QC processor to prompt for user acceptance of the save operation this is useful for validating the procedure and avoiding errors 80 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE SETINPUT1 MLS REFERENCE NEARFIELD MLS LIMITS NEARFIELD LIM SAVENAME NEARFIELD SAVEPROMPT 1 SETINPUTZ MLS REFERENCE FARFTELD MLS LIMITS FARFTELD LIM SAVENAME FARFIELD SAVEPROMPT 1 SETISENSE SIN OUTOCBOX 1 IN 30 REFERENCE IMPEDANCE SINI LIMITS IMPEDANCE LIM SAVENAME IMPEDANCE SAVEPROMPT 1 You can find the files of this example in the My Documents Audiomatica CLIO 10 EXAMPLES EXAMPLE4 folder 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 81 20 2 5 EXAMPLE 5 QUALITY CONTROL OF A TELEPHONE WITH LOUDNESS RATING CHECK We describe here the quality control test of the production of a telephone unit Two script files take part to this example The c
78. ide a QC session if CLIO is exited then later QC is started again a new QC session will be created report information and review operation will only apply to the new session 19 QUALITY CONTROL 23 19 4 4 THE QC RESULT PANEL AUDIOMATICA CLIO QC PROCESSOR MY COMPANY MY QUALITY CONTROL UNIT N 5 913Z841519M001 3 Bad READY Figure 19 20 The QC Result panel usually accompanies QC sessions where measurement display is not needed This results in a situation with simple go no go masks for use with completely automatic lines or for operators who don t need to take particular actions with respect to the test result To activated the QC Result panel from within the QC script use the DISPLAY 0 keyword Note for maximum QC test speed use the QC Result display and don t show single measurements as the display of graphical objects and measurement curves usually employs a lot of processor time The QC Result panel can be forced to appear at the end of the QC sequence pressing the l lbutton If Shrink QC result is selected in the associated drop down menu the QC result panel will appear in a minimized version UNIT N 40070755 19 4 5 THE QC BANNER 2 CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help 3 Multi Meter tam M MANAA as Figure 19 21 The QC Banner is managing information and messages given to the operator while in Interactive mode 24 19 QUALITY CONTROL
79. igned to it ABSOLUTE LEVEL UPPER 3 LOWER 3 ALIGNFREQ 5000 ALIGNLEV 90 UPPER LIMIT DATA 200 300 800 1000 3000 4000 7000 15000 8 LOWER LIMIT DATA 200 300 10000 L50000 ID INDY OY Mo Bo q The align point in the example 90dBSPL 5000HZz is used to build the frequency mask that is specified relative to it and also to identify the frequency at which to perform the level check BR MLS Level 0 22dB GOOD 5 x BaWLS Level 0 22dB GOOD neon el 100 Figure 19 34 Fig 19 34 shows a mask aligned to the point 90dBSPL 5000Hz The level check means that the value of the measurement at 5000Hz is 0 22dB higher than the align point The measured curve is shifted from this value to pass at exactly 90dBSPL at 5000Hz then the frequency check is performed see also 19 6 4 The level shift means that the curve is displayed with a level different from the measured one Refer also to Fig 19 19 19 QUALITY CONTROL 39 19 6 4 SENSITIVITY CHECK The following limits file defines a sensitivity check inside a relative frequency limit RELATIVE SENSITIVITY UPPER 102 LOWER 100 UPPER LIMIT DATA 200 10 500 10 1000 J 1500 5 2000 10 4000 10 LOWER LIMIT DATA 200 10 500 10 1000 1500 5 2000 10 4000 10 As per the average level check when a sensitivity check is defined inside a limits file the QC result is actually a combination of two separate che
80. isually input the frequency limits directly drawing on the active measurement control panel Fig 19 15 shows the MLS control panel with the Draw Limits controls on the top Clicking on one of the two buttons starts drawing the relative limit curve to finish input double click on the last frequency point Note it is mandatory to input points from left to right DS MLS Response GOOD wa Lin 6 SN CHA y dB y Unsmoothed y QQ 9 OOONSOea I eOeOTOe0o0 A M 100 1k Hz 10k 20k CHA dBY Unsmoothed 48kHz 16K Rectangular Start 0 00ms Stop 341 31ms FreqLO 2 93Hz Length 341 31ms Figure 19 15 El Hides if visible or shows if hidden the limits curves in the active measurement control panel 20 19 QUALITY CONTROL 19 4 2 THE QC REPORT PANEL QC Report STATISTICS Pel y COMPANY Pal AY QUALITY CONTROL DATE 24 01 2005 st TEST REPORT UNIT 2 GOOD 16 44 04 1 GOOD MLS 42 GOOD MET UNIT N1 GOOD 14 56 45 1 GOOD MLS 2 GOOD MET Figure 19 16 The QC Report panel serves as an interactive tool which is of great help for inspecting a production while it is tested it is composed by two tree views named STATISTICS and TEST REPORT these handle all the information pertaining to your QC session in a very compact form The QC Report panel can be kept open during the tests and it accompanies the work in a real
81. it as SKIPPED 19 QUALITY CONTROL 51 19 8 INTERACTING WITH EXTERNAL HARDWARE The interaction with external hardware gives CLIO the possibility of realizing semi or fully automatic production line QC tests Several keywords have been introduced to implement this functionality see to reference section for a complete listing 19 8 1 INPUT SENSITIVITY AND OUTPUT VOLTAGE CONTROL As we have already seen it is of fundamental importance to correctly set CLIO s input sensitivity and output level see 4 5 The IN and OUT keywords are used for this The script below sets the input sensitivity at 10dBV and output level at OdBu These numbers also directly appear also in the main tool bar of CLIO IN 10 OUT 0 The OUTUNITS keyword can be used under GLOBALS to define the output level unit of measure you may choose either V dBV or dBu default is dBu To output 1V simply write GLOBALS OUTUNITS V OUT 1 or even simpler OUT 1V If you feed the output to a power amplifier the resulting signal at amplifier terminals will be amplified by the gain of the amplifier It is possible to take this effect into account and specify the output level directly at the amplifier s output in the particular case you are using a CLIOQC Amplifier amp SwitchBox The following script can be used to set 2 83V at the output of the amplifier OUTOCBOX 2 83V 19 8 2 QCBOX MODEL 5 DC OUTPUT CONTROL The QCBox Model 5 Amplifier amp SwitchBox has
82. legacy devices like LPT ports The TTL signals generated with the QCBox Model 5 may be interactively controlled by means of the QCBox amp LPT dialog recallable with Shift F4 After opening this box press the Model 5 button and you obtain the control panel shown in figure QCBox E LPT Controls LLE ox Model 5 Controls allow O amp E 8 2 Y IM 3 DL a IM 4 DC 2 0 Ay Out Current The Model 5 Controls dialog lets you interactively set the status of the output bits while monitoring the input ones simply click on green pin to control its status The pin out of the Digital I O port of the QCBox Model 5 is shown in figure note the six output bits the four input bits and the 5V line S gt gt eae E E E E E 19 QUALITY CONTROL 59 19 8 9 RS 232 SERIAL PORT CONTROL During QC execution it is possible to control serial devices like label printers connected via an RS 232 link to your PC You can select and configure a COM port for QC control within CLIO Options gt QC See 19 4 8 The following script can be used to print a label at the end of a QC test if the result of the test is good the printing commands refer to a Zebra Z4M printer GLOBALS OPENSERIAL 1 SERIALMONITOR 1 IF ALL GOOD SERIALOUT XA LH40 100 FO20 10 AD FD GSERIALNUMBER FS XZ Note the SERIALNUMBER acronym that is used to output the current serial number It is possible to activate mainly for debugging purp
83. llowing 1 Execute and save a reference measurement with R amp B Enabled under settings 2 Define a limits file adding the limit definition RUB BUZZ UPPER LIMIT DATA Select rub amp buzz curve for display RUB BUZZ DISPLAY NOTE 1 If more than one curve is selected for display only one will be displayed the others only calculated and QC check done to inspect the curves not diplayed after a QC test is finished you must release the measurement see 19 4 1 and operate the proper buttons within the sinusoidal menu NOTE 2 If a level or sensitivity check is performed within the QC check and the distortion data are expressed in dB units not units the calculated limit masks R amp B THD and nth Harmonic will be shifted to take into account the sensitivity difference with the reference 19 QUALITY CONTROL 43 19 6 8 THIELE amp SMALL PARAMETERS CHECK It is possible to execute QC tests of the following T amp S parameters Qt Qe Qm Fs Cms Mms Mmd BI Vas dBSPL and ZMin To evaluate the first four parameters it is necessary to input the value of the DC resistance of the voice coil with the keyword REDC To evaluate the remaining parameters by means of a simplified estimation routine it is necessary to input the value of the driver diameter with the keyword DIAMETER and one of the following fixed quantities KNOWNMMD fixed mass or KNOWNMMS fixed mass plus air load or KNOWNCMS fixed compliance The following li
84. ly effective visual form Under STATISTICS you find information about QC test and Company names Date of the first unit tested Name of the production batch First serial number tested Total number of units tested number of good and bad units Under TEST REPORT you find information about DUT test result with serial number and time of production Single tests results Names of the saved files The QC Report panel is also the starting point for reviewing a saved measurement as described below The name of the saved file is a sensible area where you can double click to review the measurement 19 4 3 REVIEWING A MEASUREMENT During a QC tests session it is possible to review a measurement that has been saved to disk This is important when for example trying to understand why a measurement went bad As we saw before the QC report panel indicates all the names of the files that have been created during the test execution under the relative serial number and single test number 19 QUALITY CONTROL 21 OMIT M 4 BAD 9 47 32 H 1 GOOD SIN CHA LOOP A 2 GOOD MET CHA LOOP MB 3 BAD SIN CHE LOOP 0 4 BAD MET CHB LOOF Pres Voltage 85 02040 BAD lt lt Frequency 151Hz BAD bosses 0 TH 61 101 Oop C clio 2000Wata po NAL TOSA EN H 0 UNIT M3 GOOD 9 47 23 Figure 19 17 ES 0 4 E E e El 4 met As soon as a QC sequence is terminated simply open the tree view of your interest identify the measu
85. ment The default Windows printer is used QCBOXCURRENTLIMIT Current limit A for Model 5 operation Ranges from O to 10 QCBOXDCOUT DC voltage V to be output by Model 5 superimposed to generated signal Ranges from 20 to 20 QCBOXINITIALBYTE 8 BIT binary value that will be output from Model 5 port at startup before QC script execution QCBOXOUTBITO Status 1 or O of the bit that will be output from Model 5 BITO QCBOXOUTBIT1 Status 1 or O of the bit that will be output from Model 5 BIT1 QCBOXOUTBIT2 Status 1 or O of the bit that will be output from Model 5 BIT2 QCBOXOUTBIT3 Status 1 or O of the bit that will be output from Model 5 BITS QCBOXOUTBIT4 Status 1 or O of the bit that will be output from Model 5 BIT4 QCBOXOUTBIT5 Status 1 or O of the bit that will be output from Model 5 BITS QCBOXOUTBYTE 8 BIT binary value that will be output from Model 5 port 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 109 QCBOXPHANTOM Microphone power supply voltage V set for Model 5 IN1 and IN2 input Ranges from 2 to 24 SERIALOUT ASCII text to be sent to serial device You may use some acronyms preceded by SERIALNUMBER is translated in the current serial number DATE is translated in the current date TIME is translated in the current time SERIALOUTFILE Name of an ASCII file containing text to be sent to serial device SERIALOUTCR 1 Outputs carriage returns at the e
86. metimes renders this action difficult It is not uncommon to believe you have saved a file with say the name myfile qc where you tried to force the extension and then find it actually saved as myfile qc txt because the text editor automatically appended the registered extension You may write your script directly by editing it within the QC control panel text display in this case the extension management is guaranteed by CLIO and you will be able to use some tools like measurements capture that are of help during everyday jobs By doing it like this it is possible to immediately test the script by pressing Go Let s now write our first QC script Have your CLIO system in the same setup as when you performed the system calibration output A connected to input A see chapter 3 for details Don t connect any external device to the system Set output level at OdBu and input sensitivity at OdBV see Chapter 4 for details Have the default settings loaded Open MLS press Go You should obtain a straight line as in Fig 19 23 Expand the display to obtain 2dB div ans set upper Y scale value to 2dBV Save this measurement as Loop mls 28 19 QUALITY CONTROL WE MLS Response GOOD Figure 19 23 Now open the QC control panel Press N we are starting a new script Press Ctrl E to exit edit mode and then press L to enter Limits
87. mits file defines a T amp S parameters check inside a limits file with a frequency mask for an impedance response The parameters checked are Qt Qe Qm and Fs TSPARAMETERS OTUPPER 0 3 OTLOWER 0 05 QEUPPER 0 3 QELOWER 0 05 OMUPPER 5 OMLOWER 2 FSUPPER 90 FSLOWER 50 REDC 93 5 UPPER LIMIT DATA ADS LADOS Aid IA ES ISS ES LL 19 E OZ PASOS LOWER LIMIT DATA ZO E09 Vie 9 E 3 Ze 6443 3 AD 8S if operas A 0G 98 49 LUIS LA LST ip ae The following section defines a T amp S check of Qts Fs Cms BI and ZMin having fixed the mechanical mass Mmd value TSPARAMETERS REDC 6 2 DIAMETER 110 KNOWNMMD 10 7952 OTSUPPER 0 6 OTSLOWER 0 3 FSUPPER 90 FSLOWER 50 CMSUPPER 1 1 CMSLOWER 0 8 BLUPPER 6 5 BLLOWER 6 ZMINUPPER 7 95 ZMINLOWER 7 44 19 QUALITY CONTROL 19 6 9 LOUDNESS RATING CALCULATION AND CHECK It is possible to execute QC tests of the following loudness rating indicators RLR SLR STMR The following limits file defines a loudness rating parameters check inside a limits file with a frequency mask for an frequency response LR SLRUPPER 11 SLRLOWER 5 UPPER LIMIT DATA 100 3 200 IS 3000 Leg 5000 3 LOWER LIMIT DATA 100 3 200 o 3000 LO 5000 3 19 QUALITY CONTROL 45 19 6 10 MULTIMETER LIMITS FILES The following limits file defines a multimeter QC check UPPER LIMIT DATA VOLTAGE 0 78 THD 0 01 LOWER LIMIT DATA VOLTAGE 0 77 THD 0 0001 The parameters available are
88. mitted defaults to O EQREFERENCE Name of a reference frequency response file used to equalize generator output response in a sinusoidal measurement In this case the output level settings refer to the same units of the eqreference file and set output level accordingly IN Sets the input sensitivity for both input channels INA Sets channel A input sensitivity channel B sensitivity remains untouched INB Sets channel B input sensitivity channel A sensitivity remains untouched LIMITS Name of the limits file Applies to both channel if stereo and LIMITSB is not present LIMITSA Name of the limits file for channel A in stereo measurements LIMITSB Name of the limits file for channel B in stereo measurements LOOP 1 Loops the current Multimeter measurement to let the user perform an adjustment on the unit under test 0 Executes the Multimeter measurement and exits If omitted defaults to O MODE DIFFERENCE Executes the measurement referring it to the reference file Valid only for MLS and Sinusoidal measurements NORMAL Executes the measurement normally If omitted defaults to NORMAL OPERANDnA OPERANDnB Define the operands of a mathematical operation as described in 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 103 20 4 3 n denotes the relative operands number n may range from 0 to 9 Possible operands are LEVEL MLS sinusoidal FFT SENSITIVITY MLS sinusoidal FFT FS T amp S QTS T amp S
89. ncy mask used for the response check If omitted defaults to ALIGNLEV REFERENCE LOWER Lower limit for the mean level check UPPER Upper limit for the mean level check FREQLO Lower frequency to calculate the mean level If omitted the lower frequency is taken from the lowest frequency defined by the frequency mask FREQHI Upper frequency to calculate the mean level If omitted the upper frequency is taken from the highest frequency defined by the frequency mask SENSITIVITY Starts a section defining a check on the sensitivity of the measured curve LOWER Lower limit for the sensitivity check UPPER Upper limit for the sensitivity check FREQ1 FREQ8 Define up to eight frequencies where to calculate and then average 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 113 sensitivity If omitted the sensitivity is calculated averaging the band defined by the extremes of the frequency mask TSPARAMETERS Starts a section defining a Thiele amp Small parameters check PERCENT 1 Interprets limit values as percentages 0 Does not interpret limit values as percentages Defaults to O REDC Value in Ohms to be input representing the DC resistance of the voice coil REDC must always be specified DIAMETER Input value in mm specifying the driver diameter It is needed only when testing Cms Mms Mmd Bl Vas dBSPL or ZMin used with one of the fixed parameters KNOWNMMD or KNOWNMMS or KNOWNCMS You must spe
90. nd of serial data 0 Does not output carriage returns at the end of serial data Defaults to 0 SHOWPICTURE Name of an image file containing a picture to be output to screen See also PICTURETITLE STOP Stops the script execution after executing all keywords in the current section Result is unaltered See also ABORT WAITCOMPLETION 1 The QC script wait for the external program to end before continuing execution 0 The QC sequence continue without waiting If omitted defaults to O 110 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 4 5 KEYWORDS FOR HARDWARE CONTROL RESETLOOPA Opens internal loop on channel A RESETLOOPB Opens internal loop on channel B RESETMUTEA Switches mute for channel A off RESETMUTEB Switches mute for channel B off RESETPHANTOM Switches phantom power off RESETPHANTOMA Switches phantom power for channel A off RESETPHANTOMB Switches phantom power for channel B off SETIMPEDANCE Selects impedance mode of the CLIOQC Amplifier amp SwitchBox SETINPUT1 SETINPUT2 SETINPUT3 SETINPUT4 SETINPUT5 SETINPUT6 SETINPUT7 SETINPUTS8 Selects the relative input channel of the CLIOQC Amplifier amp SwitchBox SETISENSE Selects isense mode of the CLIOQC Amplifier amp SwitchBox SETLOOPA Closes internal loop on channel A SETLOOPB Closes internal loop on channel B SETMUTEA Switches mute for channel A on S
91. nt as loop met Fig 19 25 should be what you have in front of you CLIO ELECTRICAL ACOUSTICAL TESTS File Analysis Controls Window Help Eor BEI i RS MLS Response GOOD av IX 108 0 180 0 BES 0 20 E RUNNING UNIT N 3 READY Figure 19 25 Now press Ctrl Q and then L to go back to inputting a limits file definition Input the following 30 19 QUALITY CONTROL UPPER LIMIT DATA VOLTAGE 0 78 THD 0 01 LOWER LIMIT DATA VOLTAGE 0 77 THD 0 0001 Save this as loopmet lim Now click on the atbutton and position the cursor inside the text display after the last line of text as before click on the capture button and the following lines should be added and you are ready for this new QC test MET OUT 0 0 IN 0 REFERENCE LOOP MET LIMLTOSLOOPME T LIM It is a good practice to add the following comment line COMMENT LEVEL THD Now pressing the Go inside QC executes this two measurement QC test sequence Fig 19 26 shows the test at its end CLIO ELECTRICAL amp ACOUSTICAL TESTS DAR Fie Analysis Controls Window Help L TE LEVEL THD Voltage 0 774Vrms GOOD THD 0 005 GOOD See THD 0 005 O 14 Vrms i 20 IE Quality Control MY COMPANY MY QUALITY CONTROL AE 40020256 Ss E 088 lib 1 GOOD FREQUENCY RESPONSE Response GOOD 2 GOOD LEVEL THD Voltage 0 774Vrms GOOD THD 0 005 GOOD 17 1 2006 3 16 49 PM UNIT N 4002
92. nusoidal test this time is usually small but not zero and may range in some hundred of milliseconds depending on the platform chosen If very tight synchronization is needed and you want to avoid the calculation time it is possible to require that the TTL signal is output right after the sweep is completed without waiting for the sinusoidal test to end to do this place the relative keyword right under the SIN definitions thus changing the script to PERFORM OCBOXOUTBYTE 0 SIN OUTOCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM LIMITSB IMPEDANCE LIM POLARITY 1 OCBOXOUTBITO 1 IF ALL GOOD QCBOXOUTBITI 1 IF ALL BAD OCBOXOUTBIT2 1 You can find these example files in the My Documents Audiomatica CLIO 10 EXAMPLESNEXAMPLEO folder 72 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 2 QC EXAMPLES 20 2 1 EXAMPLE 1 QC OF A MICROPHONE PREAMPLIFIER Preamplifier This example is taken form our internal QC procedure for the PRE 01 Microphone Preamplifier Figure shows the connections required The PRE 01 features three weighting filters and two gain positions This test is a representative case of the following requirements 1 The limits are ABSOLUTE as they are taken from the IEC tables for the specified tolerance Since the perfect device has still to be built it is not possible to use relative limits from a real life measured reference 2 The IEC specifies a respons
93. ol test relies on real measurements saved on disk and on a simple text script amp my first qc File Edit View Go Favorites Help e gt ay apa x E Back Forward Up Cut Copy Paste Undo Delete Properties Address C C 4clio2000 qemanualmy first qe ha Report loop loop loop loopmet my first qc Select an item to view its description loopmls eg e i Figure 19 5 Defining a QC script is easy as it requires the writing only a few descriptive lines of text no programming languages or complex instructions are involved CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help causas E Meg NE ML sx Ts Y le rr OR HS MLS Response GOOD 2 E Multi Meter Quality Control MY COMPANY MY QUALITY CONTROL DEG Aba GLOBALS COMPANY MY COMPANY TITLE MY QUALITY CONTROL DISPLAY 1 INTERACTIVE 1 SETLOOPA MLS OUT 0 0 IN 0 REFERENCE LOOP MLS LIMITS LOOPMLS LIM a TEST REPORT UNIT N 2 GOOD 16 06 38 _ Q 1 GOOD MLS REFERENCE LOOP MET bd 2 GOODMET LIMITS LOOPMET LIM 9 UNT N1 GOOD 16 02 26 1 GOODMLS 2 GOOD MET Filename loop qc UNIT N 3 READY ee 0 By ae ee 0 dBv ae A e Out 00dBu v a 4 Pg w 479 C Figure 19 6 It is possible to capture the active measurement the check masks can also be input in a visual manner drawing limits over the measurement debugging is helped by an internal correcto
94. onnect to CLIO request measurements and receive results follow clio client c code for example client program that uses TCP include include include include define extern char Progr Purpo Synta Note A A ACA CA int stri main arg int char 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE lt windows h gt lt winsock h gt lt stdio h gt lt string h gt PROTOPORT 1234 int errno localhost localhost am clioclient se allocate a socket the QC environmet connect to the Clio Server Xi client host port host name of a computer on which server is executing default protocol port number default host name port protocol port number server is using Both arguments are optional the client uses localhost if no protocol port is specified the client uses the default given by PROTOPORT ng length char str C argv argc xargv struct hostent ptrh struct protoent ptrp struct sockaddr in sad Int sd int port char hosts int n char ibuf 100 char obuf 100 WSADATA wsaData pointer to a host table entry pointer to a protocol table entry structure to hold an IP address socket descriptor protocol port number pointer to host name number of characters read buffer for data from the server buffer for data to the server
95. onvention AES preprint 4136 27 A Mertins Signal Analysis Wavelets Filter Banks Time Frequency Transforms and Applications 1999 J Wiley 120 BIBLIOGRAPHY NORMS 1 2 3 4 5 6 7 8 IEC 61672 Sound Level Meters replacing former IEC 651 Sound level meters and IEC 804 Integrating averaging sound level meters IEC 60268 Sound system equipment IEC 60386 Methods of measurement of speed fluctuations in sound recording and reproducing equipment ISO 226 Normal equal loudness level contours ISO 266 Preferred frequencies for measurements ISO 3382 Measurement of reverberation time of rooms with reference to other acoustical parameters IEC 61260 Octave band and fractional octave band filters SMPTE RP120 Measurement of Intermodulation Distortion in Motion Picture Audio Systems NORMS 121
96. oses a monitor window that echoes RS 232 activity to do this use the SERIALMONITOR keyword OC AS 232 Monitor EJ OUT KA LH40 100 FOO 10 AD FO FS ee OUT KA LH40 100 FO2O AO AD FD FS WE The same text output in the above example could be saved in an ASCII file and loaded with the SERIALOUTFILE keyword IF ALL GOOD SERIALOUTFILESSERIAL TXT 60 19 QUALITY CONTROL 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 1 A COMPLETE FAST SINGLE TEST LOUDSPEAKER QUALITY CONTROL CLIO QC is able to program and execute a very fast accurate and complete single test quality control of a loudspeaker using the new functionality of the sinusoidal measurement menu One of the key features of this approach is represented by the new FAST TRACK rub amp buzz detection that is carried out along the sinusoidal sweep With just one sinusoidal sweep it is possible to measure Frequency response Impedance reponse Sensitivity Polarity Total harmonic distortion response Single harmonic response from 2nd to 10th Rub amp Buzz T amp S parameters Fs Qt Qe Qm Cms Mms Mmd Vas Bl dBSPL ZMin Choosing among the various settings of the sinusoidal test it is possible to tailor the QC test easily controlling the trade offs between speed and accuracy This example describes a test setup and the relative QC script that may be implemented in an automatic production line capable of
97. ows such a situation the title of the measurement control panel reports the level check 36 19 QUALITY CONTROL ESMLS Level 0 09dB GOOD mw Hos AS 0 8 EA MLS Level 0 09dB GOOD Mm com 2 wl o Figure 19 31b The level check shown means that the value of the measurement averaged in the band shown is 0 09dB higher than the reference average level in the same frequency band The measured curve is shifted from this value and then the frequency check is performed see also 19 6 4 The level shift means that the curve is displayed with a different level from the measured one Refer also to Fig 19 19 As two separate checks are done there may be two distinct cases when a unit results in a bad report The following figures try to explain these two cases Figure 19 32 shows us the case of a unit is testing bad because the frequency behavior is not good while the average level is OK B MLS Level 0 15dB GOOD BAMLS Level 0 15dB GOOD i Mca ee lt i o EIA Figure 19 32 19 QUALITY CONTROL 37 Figure 19 33 instead shows us the case of a unit is testing bad because the average level is not good while the frequency behavior is OK BIMLS Level 5 82dB BAD 10 x AAA Aa lesa Tee AQ MLS Level 5 82dB BAD i e oa ae i 4 Figure 19 33 38 19 QUALITY CONTROL 19 6 3 ALIGNED MASK The following limits file defines a single point level check with a frequency mask al
98. r ares avyexr 98 y mqacadgar 100 1k Hz 10k 20k CHA dBY Unsmoothed 48kHz 16K Rectangular Start 0 00ms Stop 341 3ims FreqlLO2 93Hz Length 341 3ims Figure 19 7 8 19 QUALITY CONTROL 19 2 3 THE COMPANY S POINT OF VIEW CLIO when used for quality control executes line testing in a fast accurate and reliable manner Its flexibility permits easy handling of trade offs between parameters like speed and accuracy always matching the company s needs The autosaving and exporting capabilities together the complete result reporting gives instant access to the production parameters and statistics even during its operation The production batch is fully managed while preserving serial number coherence 1o B ye Kx g Cut Copy Paste Undo Delete Properties 40020234 40020235 23 05 02 17 27 43 t t Text Document Modified 23 05 02 17 27 Size 257 bytes 40020246 40020247 40020248 40020252 40020253 40020254 40020255 40020256 257 bytes BY My Computer Figure 19 8 Autosawe File Edt View Go Favorites Help gt y Balal X Back Eamsand Up Cut Copy Paste Unda Delete Address C C rclio2000 qomanualtmy first gertu TO SAWE m 4002235 1 4002235 2 oF Autosave Sa Select an item to view its 4002237 1 4002237 2 description om pe t a a Po m Lu i us ee A Ja Se
99. r with time as device thermal constants are reached For the same reason if R amp B is one among other QC tests it should be done at the end 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 83 Once the stimulus has been defined you must define a proper FFT QC test be sure to use the same size of the stimulus i e FFT Size Chirp Size Another important FFT parameter to set is smoothing which will present an easier to detect analysis we suggest 1 48 or 1 24th of octave smoothing The analysis leads to the following situation You can see the ee of a good and a re device which will lead you to correct mask definition it is also shown how this measurement detects the harmonic signature of the device the plateau marked with 2nd directly refers to second harmonic response This QC test is as simple as the following definition FET COMMENT RUB amp BUZZ OCBOXDCOUT 2 83 IN 0 RE FERENCE RUB FFT LIMITS RUB LIM We set 2 83V at the QCbox output given a former OUTUNITS V definition and input at OdBV Extreme care must be put in order to optimize input sensitivity as this measurement is very sensitive to noise Limits mask should be placed in the decaying part of the acquisition and extendend to cover the highest frequencies only upper limit is necessary in this case CLIO ELECTRICAL amp ACOUSTICAL TESTS SEBBA6 A Maaa HNENL vox las B Od gt Ls E A Rectangular FET gt cBsPL 1 24 Octav
100. region while 5 outside with respect to the reference An important feature for a relative file is the possibility of adding a frequency jitter to the calculated limits curves This quantity is expressed in fractions of octaves and tells how much jittering is applied to the limits The effect shown in the below curves is to allow rapidly changing but small frequency behaviors of the measured curves while not loosening too much the mask 130 0 130 0 p te e A S E The limit curves in the left figures have no jitter but may be problematic during QC operation easily giving false negatives due to the break up effects in the higher part of the spectrum Adding a 1 3 of octave jittering with RELATIVE FREQUITTER 0 3 You obtain the relative limits as in the right figure which cure the problem not giving rise to false negatives while keeping the mask tight It is possible to input up to 2048 frequency points to define the check mask The QC processor will execute the check starting from the first frequency point ending at the last no check will be done outside this frequency range Inside a frequency limits file it is possible also to define frequency masks for executing a QC check on the following Average or single frequency level 19 6 2 and 19 6 3 Sensitivity average or up to ei
101. rement you want to inspect and double click on its name Fig 19 17 CLIO loads the measurement as if it were performed inside the running QC together with its pertinent limits and executes all the calculations defined in the QC script ending with the result check and display Fig 19 19 describes such a process compare it with Fig 19 12 DOUBLE CLIK LOAD ON REPORT LOAD LIMITS REFERENCE TREE VIEW FILE FILE LOAD MEASUREMENT FROM DISK BAD CALCULATE OPTIONAL PARAMETERS DISPLAY RESULT REVIEW MEASUREMENT A Figure 19 19 Reviewing a saved measurement from within QC is different from simply opening the file from the measurement control panel in this second case no post processing due to QC operation is applied Fig 19 19 shows a measurement black curve reviewed inside QC with its limits red and blue curves and the same measurement loaded from the measurement control panel purple curve the shift in level is due to QC operation when it separately checks for relative level and frequency behavior 22 19 QUALITY CONTROL SN Sinusoidal Response GOOD Level 9 83dB GOOD 180 0 Deg HAT 1k Hz Filename rog sin CHA dBSPL Resolution 1 6 Octave 1 3 Octave Delay ms 0 000 Dist Rise dB 0 00 Figure 19 19 Note the review operation can be done only when ins
102. s like a frequency response together an impedance response The LIMITS keywork in this case is substituted by the two keywords LIMITSA and LIMITSB A stereo sinusoidal test may be defined as SIN REFERENCE MYREFERENCEFILE SIN LIMITSA MYRESPONSELIMITSFILE LIM LIMITSB MYIMPEDANCELIMITSFILE LIM 19 QUALITY CONTROL 17 19 4 THE QC CONTROL PANEL Quality Control MY COMPANY MY QUALITY CONTROL wy E 6 OF lib GLOBALS COMPANY My COMPANY TITLE MY QUALITY CONTROL DISPLAY 1 INTERACTIVE 1 SETLOOPA REFERENCE LOOP MLS LIMITS LOOPMLS LIM REFERENCE LOOP MET LIMITS LOOPMET LIM Filename loop qc Figure 19 13 Figure 19 13 shows the Quality Control panel that is composed by a toolbar similar to the other CLIO panels plus a text display area that is used either for editing the QC files QC script and Limits file or for showing information about the QC test When the QC display handles file editing it has a white background while when showing information it is lightly colored 19 4 1 TOOLBAR BUTTONS P Starts a QC test Enables tracing of the QC script during execution If pressed during test execution the QC control panel is not minimized and remains visible showing the current script section under execution lel Forces the QC result panel to be displayed after tests completion Refer to 19 4 3 for more details Quality Control shrink QC result drop down E 2 2 1 GLOBAL w Shrink To QC Result f
103. s when unit is bad for user acceptance and overrides result 0 No prompt when unit is bad If omitted defaults to O i e no prompt QCBOXCURRENTLIMIT Current limit A for Model 5 operation Ranges from O to 10 QCBOXDCOUT DC voltage V to be output by Model 5 superimposed to generated signal Ranges from 20 to 20 QCBOXINITIALBYTE 8 BIT binary value that will be output from Model 5 port at startup before QC script execution QCBOXOUTBITO Status 1 or O of the bit that will be output from Model 5 BITO QCBOXOUTBIT1 Status 1 or O of the bit that will be output from Model 5 BIT1 QCBOXOUTBIT2 Status 1 or O of the bit that will be output from Model 5 BIT2 QCBOXOUTBIT3 Status 1 or O of the bit that will be output from Model 5 BIT3 QCBOXOUTBIT4 Status 1 or O of the bit that will be output from Model 5 BIT4 100 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE QCBOXOUTBIT5 Status 1 or O of the bit that will be output from Model 5 BITS QCBOXOUTBYTE 8 BIT binary value that will be output from Model 5 port QCBOXPHANTOM Microphone power supply voltage V set for Model 5 IN1 and IN2 input Ranges from 2 to 24 RESETRESULTCOLOR 1 If multiple tests of the same kind MLS FFT MET SIN are present resets the result color of the menu display to match the last test of that kind O If multiple tests of the same kind are present maintains the color of a bad result if any If omitted d
104. server needs to know that the sequence of commands that defines the measurement has ended there is the special execute command two empty brackets that is needed at the end to tell CLIO to execute the measurement LIMIT S LUUPRLS LI OO Additional Command UK C O00 GOOD r GOOD Response After we give the execute command the measurement starts and the result is fed back to our application The first line of the result is the global test result while each subsequent line details all the single checks that have been done and that participate to the global result To see more tests in action we may add a level check and a polarity test To do this we must add the following to the limits file loopmls lim 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 89 LEVEL UPPER 2 LOWER 2 And we must add the following to the commands sent POLARITY 1 We get the following situation CLIO ELECTRICAL amp ACOUSTICAL TESTS AE TEK _ localhost CRT Ea fx File Edit View Options Transfer Script Window Help RELE CLE RR delcome to Clio 8 QC Remote Server CMLSI le Quality Control 200 Start Command OK at OUT 0 0 gt B C TE aa nl 1200 Additional Command OK T IH 0 200 Additional Command OK PREFERENCES LOUP MLS 200 Additional Command Ok LIMITS LOOPMLS LIM 200 Additional Command OK POLARITY 1 200 Additional Command OK C 200 GOOD 200 GOOD Response 200 GOO
105. surement LPT Parallel Port case GLOBALS INITIALBITS 0 LEET MLS IF LAST BAD BIT 3 BITVALUE 1 DELAY 200 IF LAST GOOD BIT 3 BITVALUE 0 DELAY 200 IF ALL GOOD BIT 1 BITVALUE 1 PERFORM BIT 0 BITVALUE 1 DELAY 200 PERFORM SBITVALUE 0 This example defines a signal high on bit 3 if the MLS test performs bad a signal high on bit 1 if all the tests are OK and an unconditioned pulse of 200 ms on bit O that may be used to signal the end of the QC test sequence Referring to Figure 19 42 we can see the time signal of the three bits in the two possible cases A and B in case A the MLS test performed bad and in case B good 19 QUALITY CONTROL 55 bit 3 bit 1 bit O load setup bit 3 bit 1 bit O load setup start start FFT FFT MLS bad MLS good Figure 19 42 end bad end good ready for next ready for next Let s see now translate the same script with QCBox Model 5 dedicated keywords GLOBALS OCBOXINITIALBYTE 0 EEE MLS IF LAST BAD OCBOXOUTBIT3 1 DELAY 200 IF LAST GOOD OCBOXOUTBIT3 0 DELAY 200 IF ALL GOOD QCBOXOUTBITI 1 PERFORM OCBOXOUTBITO 1 DELAY 200 PERFORM OCBOXOUTBYTE 0 56 19 QUALITY CONTROL 19 8 6 TIME DELAYS GENERATION It is possible to define a time delay in any point of a script file with the following definition PERFORM DELAY 200 In this example the QC sequence waits for 200 millisecond when encounterin
106. t be signed usually you will need to sign the QC Script qc extension and all the limits files lim extension present in the test you want to protect To sign a file simply save it with MASTER credentials i e logged as MASTER operator When you save a script or limit file under these conditions CLIO will also generate a digital signature that will be stored in a file saved inside the same folder ES Search Date modified Type Size ref lim ref lim CHK LIM File Se CHK File E Pictu 181 bytes No Music b renge CHK CHE File Lt nr More gt Folders gE Des E aL di P gt A 5 tems Aside the rer qc file there is its digital signature rer qc chk file In its absence the script cannot be loaded and run 12 19 QUALITY CONTROL 19 3 THE QC SOFTWARE OPERATION The QC software is a file driven event processor that in sequence performs a number of user defined measurements to test the quality of a production line The text file qc extension driving this process is called the QC Script CLIO s QC processor does the following job reads the QC script and loads it in memory interprets it executes all the tests reports the test result and production statistics manages the production batch and serial number prompts for the next test The following block diagram outlines the QC process LOAD QC SCRIPT WAIT FOR USER OR TRIGGER TO START QC TEST PERF
107. t to be displayed in a prompting message to the user MESSAGE3 Third line of text to be displayed in a prompting message to the user MESSAGE4 Fourth line of text to be displayed in a prompting message to the user OPENSERIAL Opens the QC COM port for serial communication See 6 3 6 for RS 232 settings OUT Sets the generator output level with OUTUNITS defined under GLOBALS OUTQCBOX Sets the generator output level taking into account QCBox gain with OUTUNITS defined under GLOBALS This is the level that will be present at QCBox output PARAMETER1 108 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE String to be passed as first parameter to the executable defined with EXTERNAL Some parameters relative to the QC tests can be passed with the following acronyms SERIALNUMBER passes the current serial number RESULT passes the current result LASTRESULT passes the last test result GLOBALRESULT passes the global test result PARAMETER2 String to be passed as second parameter to the executable defined with EXTERNAL See also PARAMETER1 above PARAMETER3 String to be passed as third parameter to the executable defined with EXTERNAL See also PARAMETER1 above PARAMETER4 String to be passed as fourth parameter to the executable defined with EXTERNAL See also PARAMETER1 above PICTURETITLE Name of the window where the image loaded with SHOWPICTURE PRINT Prints the current measure
108. tory where all data files are saved Fig 19 38 Shows this situation See Data pu Hai EU My qe gt 3 0 Autosave B CJ Report EJ Report E E Figure 19 37 and 19 38 3 A Batch is defined and is named My Batch A SaveFolder is not defined CLIO creates the My Batch directory where all the production report and also data files are saved Fig 19 39 shows this situation 4 A SaveFolder is defined and is named My Savefolder CLIO creates the My Savefolder directory where all the production report and also data files are saved Fig 19 40 shows this situation Ea Data e Data Flt My ge EHS My ae if Mu Batch C My Savefolde z Figure 19 39 and 19 40 19 QUALITY CONTROL 47 19 7 2 PRODUCTION REPORT FILES Suppose that today June 6 2002 at 6 46 you started a production of your devices the batch named My Batch ended yesterday with unit number 100 After two units tested CLIO will add under the folder My Batch the following report files production_06 06 02 6 46 19 txt 101 txt 102 txt After 20 units tested production_06 06 02_6 46 19 txt 101 txt 102 txt 120 txt If you stop the production exit CLIO and then restart it at 7 01 after two more units tested production_06 06 02_6 46 19 txt production_06 06 02_7 01 05 txt 101 txt 102 txt 122 txt The files production_date time txt describe the QC session They look like SLAT ISL LEGS MY COMPANY MY QUALITY C
109. ts file The Limits File is a text file lim extension defining the frequency mask or quantities needed to check the executed measurement The syntax used is the same as the QC script A Limits file can be as simple as 19 QUALITY CONTROL 15 UPPER LIMIT DATA 100 5 500 3 5000 1 10000 5 LOWER LIMIT DATA 100 aD 500 3 5000 ll 10000 5 In principle nothing else is needed to define the basic measurement here is an example of a section of a QC script defining a MLS measurement MLS REFERENCESMYREFERENCEFILE MLS LEMITS MYLIMITSETLE L EM An interesting keyword to add is COMMENT that let s you give a brief description of the QC test that will be output during the measurement and inside reports MLS COMMENT FREQUENCY RESPONSE REFERENCESMYREFERENCEFILE MLS LIMITS MYLIMITSFILE LIM While performing a QC measurement CLIO can calculate more parameters from the data acquired and have these parameters to concur with the final result As an example it is possible to make a polarity check within a MLS frequency response measurement or make a T amp S parameters check within an impedance measurement The following script adds the polarity check to the former MLS test MLS REFERENCE MYREFERENCEFILE MLS LIMITSMYELIMETSELLE LIM POLARITY 1 Here is a list of the parameters that can be calculated within each measurement Sinusoidal Frequency response and impedance response mono or stereo tests Average or single
110. yclic script moutheg qc is needed to measure and save the output pressure response of the reference speaker or mouth at reference position GLOBALS AUTOSAVE 1 SAVEFOLDER PERFORM MESSAGE PLACE REFERENCE MICROPHONE IN PLACE SIN OUT 28 dBu IN 10 REFERENCE MOUTH SIN LIMITS NONE SAVENAME MOUTH The main script phone qc tests the frequency response of the phone under test equalizing the drive pressure at 4 7 dBPa also defined inside the phone lim limits file a Send Loudness Rating QC check GLOBALS CYELTE MOUTREO Q0 CYELICFIRST1 REPETITION 100 PERFORM MESSAGE PLACE TELEPHONE IN PLACE SIN OUT 4 7 IN 10 EQREFERENCE MOUTH 5IN REFERENCE REFPHONE SIN LIMITS PHONE LIM You can find the files of this example in the My Documents Audiomatica CLIO 10 EXAMPLES EXAMPLES folder 82 20 QC BY EXAMPLES TCP IP MEASUREMENT SERVER AND SYNTAX REFERENCE 20 2 6 EXAMPLE 6 ON RUB amp BUZZ DETECTION 1 This example describes an effective technique to detect rub amp buzz in a production line of loudspeakers The technique is based on logarithmic chirp stimulus with synchronous FFT detection CLIO is able to generate see 7 7 logarithmic chirps of proper length and proper start and stop frequencies Given your production of speakers you should program the log chirp following these guidelines Frequency Range The frequency extremes depend on the kind of speaker the start frequency must be below th

QC User`s Manual - Audiomatica Srl

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