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CLIO QC EXPLAINED WITH APPS

1. 10 4 INTEGRATING THE QC REFERENCE 10 5 PROGRAMMING THE QC 5 0 10 6 RUNNING THE QC TEST 10 7 ADDING THE INTERFACE TO occ ARCEM 11 1 QC OF A MICROPHONE 11 2 THE AMPLIFIER amp SWITCHBOX UNDER 10 nnne 11 3 A TEST ON A STEREO ELECTRONIC 11 4 A CYCLIC SCRIPT USED TO MANAGE MY ROGERS LS3 5A TWO WAY LOUDSPEAKER 44444144 11 5 QC OF A TELEPHONE WITH LOUDNESS RATING 11 6 ON RUB amp BUZZ DETECTION 1 emere nnne 11 7 ON RUB amp BUZZ DETECTION 2 cccccccccececcccceccccecauececausceauseuauseuaneeeans 11 8 C CLIENT APPLICATION TO CONNECT TO TCP IP SERVER 2 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 1 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
2. 5 2 THE QC RESULT 4 0 rsen nna rna 5 3 THE QC e rr ren annii rris nsn rra arre 5 4 THE QC REPORT 5 5 REVIEWING 1 nnne nnne rre rre 5 6 THE SKIP LAST 6 NOTES ON LIMITS CURVES c cccsscccccccsececcecueceececuuceceuauceecesueceeusaueeeeeeaneesss 6 1 ABSOLUTE VS RELATIVE FREQUENCY LIMITS ee ens 6 2 AVERAGE LEVEL CHECK cccccccceececccccucccececucceecueauceecesauceeeaueeeaneeeansss 6 3 ALIGNED MASK cccccccccuccccccccucceccecuccceccucuceeeeauceeauceeaucecauceeuuuennneenen 6 4 SENSITIVITY CHECK cccccccccccccececccuuccccccuuccecauseeaueeeauceeaueeeaeeeeaneeeaaess 6 5 FLOATING LIMITS VS FLOATING 6 0 6 6 SINUSOIDAL STEREO DIFFERENCE 6 7 SINUSOIDAL THD AND FAST TRACK RUB amp BUZZ 6 8 THIELERSMALL PARAMETERS is 6 9 LOUDNESS RATING CALCULATION AND 6 10 MULTIMETER LIMITS FILES eeeeeeen ene eee nnne nnns 7 MANAGING PRODUCTION BATCHES
3. 25 ER Multi Meter Voltage 3 002V GOOD THD 0 003 GOOD e JL SS Quality Control AUDIO 18 152 3002 v Pala e 0 003 1 GOOD MET Voltage 10 007mV GOOD THD 0 004 GOOD 2 GOOD MET Voltage 3 002V GOOD THD 0 003 GOOD 3 GOOD MET Voltage 10 007mV GOOD THD 0 004 GOOD 4 GOOD MET Voltage 3 002V GOOD THD 0 003 GOOD 5 GOOD CHA IN 0 Response GOOD 6 GOOD CHB IN 0 Response GOOD 7 GOOD FFT Response GOOD 20 01 2014 16 28 23 UNIT N 7 GOOD qp pL TTL 3 gp A tt Iaa VEL p LI Bp EL LLLLLL LL 11111 p Oe a E ae EE 20 0 50 0 100 200 500 1k 2k 5k 10k Hz 80k Filename cliofwshortqcman qc UNIT N 1 amp Ga Ge 100 a G ee 492kHz 5 2 THE QC RESULT PANEL AUDIOMATICA CLIO QC PROCESSOR TIME 17 472s AUDIOMATICA FIRENZE ITALY CWBoxFW UNIT N Total 4 5 Good j Bad READY 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 activ
4. 0 51 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 encountering these keywords In the previous paragraph you can also see the possibility of mixing time delays with signals definitions in order to generate pulses 52 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 QCBox amp LPT Controls QCBox Y Model5 51 TTL f LPT Output Input v Bit 0 Bit 4 v Bit 1 Bit 5 Bit 2 Bit 6 Bit 3 7 Bit 7 3 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
5. 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 0 355 a 32k chirp lasts around 0 75 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 appear 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 78 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 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
6. IS amp nse CLIO CLIO 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 QCBox amp LPT Controls QCBox amp LPT Controls V Model 5 ai TTL EZ QCBox Y Models Input 1 Input 5 o 0 0 V Input 2 Input 81V IN 3 DC IN 4 DC Input 4 Input 8 z Out Current ME Out Load Input 3 Input 7 Imp Internal Imp Sense c 6600000000000 TYPE Model 5 Model 5 2000600006060 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
7. 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 single parameter mono tests also interactive When you have taken a single channel mono measurement you define only one limits file 2 5 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 quantities 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 MYRESPONSELIMITSEILDBE LIM LIMITSB MYIMPEDANCELIMITSFILE LIM 12 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 3 THE CLIO QC TCP IP MEASUREMENT SERVER This is the CLIO answer to the general request of being able to
8. AN 009 APPLICATION NOTE CLIO QC EXPLAINED WITH APPS by Audiomatica info audiomatica com AUDIOMATICA CONTENTS 1 FEATURES OF CLIO 0 00 eee nnne 1 1 THE OPERATOR S POINT OF 000 mere nnne nnns 1 2 THE ENGINEER S POINT OF 1 enne nnne nnne 1 3 THE COMPANY S POINT OF 0 eee ener 2 THE QC SOFTWARE 2 2 THE CYCLIC QC 5 0 0 6 3 2 3 THE REFERENCE 2 4 THE LIMITS 000 nnne e rris r nnne rr nnn nn 2 5 LIMITS FILE FOR TWO CHANNELS STEREO 3 THE CLIO QC TCP IP MEASUREMENT 5 mee nennen 3 1 INVOKING THE QC 3 2 CONNECTING TO THE QC SERVER ee eee nemen nnne nnns 3 3 INTERACTING WITH THE QC 0 eee eere nnns 3 4 NOTES ABOUT QC SERVICES eeeee eee eene rn nter nnns A HANDS ON QC sesssee ee ee eren risen rris ase erri sai rris ase rra airs 4 1 WHAT TO KNOW ABOUT QC 5 6 nnn nns 4 2 HOW TO WRITE MY FIRST QC 5 00 00 00 eene nnns 5 RUNNING A QC 5 0 0 eee eene 5 1 DESKTOP AND WINDOWS
9. 90 30 100 20 200 20 1200 20 LOWER LIMIT DATA 20 50 m 60 30 90 30 100 e D 200 25 1200 23 TSPARAMETERS PERCENT 1 DIAMETER 10 REDC 2 KNOWNMMD 5 FSUPPER 10 FSLOWER 10 OMSUPPER 10 OMSLOWER 10 ZMINUPPER 10 ZMINLOWER 10 56 18 02 1 9 S 49 39 18 65 85 www audiomatica com CLIO EXPLAINED WITH APPS 10 6 RUNNING THE QC TEST Running the complete QC test we will obtain a comprehensive graph display as in figure 120 0 TANNE FHE MES m TEST REPORT 1 UNIT N 5 GOOD 12 05 12 E 1 SN 100 0 80 0 Response GOOD RUB BUZZ GOOD THD GOOD A Sensitivity 106 59dB GOOD o B Response GOOD 50 0 Q ams 6 127 GOOD T AMA _Fs 68 88Hz GOOD LAV Zmin 7 75 GOOD UNIT N 4 GOOD 11 54 48 1 GOODSIN Response GOOD 400 M XN RUB BUZZ GOOD Q THD GOOD REE Lori 10 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 Options QC dialog CLIO Options General Units Conversion Graphics Hardware Operators amp Passwords QC Script Input Start Signal start Sign
10. ACOUSTICAL TESTS SEE File Analysis Controls Window Help SHBES6 E v X 5 Yla BEMLS Response GOOD E MLS RepmeG00D L4 5 Multi Meter iB Beli Control MY COMPANY MY QUALITY CONTROL a DAE xli GLOBALS COMPANY My COMPANY TITLE MY QUALITY CONTROL 1 DISPLAY 1 INTERACTIVE 1 E SETLOOPA P REFERENCE LOOP MLS LIMIT S LOOPMLS LIM File i TEST REPORT UNIT N 2 GOOD 16 06 38 1 GOOD MLS MET 2 GOOD LIMITS LOOPMET LIM 3 GOOD 26 UNIT N 1 GOOD 16 02 26 1 GOOD MLS 2 GOODMET Filename loop qc UNIT N 3 READY panum e o 448 000 v a am 47 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 corrector DS MIS Response GOOD ztml CHA v Unsmoothed 4 1 mrursmrmr 505008097 B 100 1k Hz 10k 20k dBV Unsmoothed 48kHz 16K Rectangular Start 0 00ms Stop 341 31ms FreqLO 2 93Hz Length 341 31ms Figure 7 6 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 1 3 THE COMPANY S POINT OF VIEW CLIO when used for quality control
11. NE argc char xargv struct hostent ptrh pointer to a host table entry struct protoent ptrp pointer to a protocol table entry struct sockaddr in sad structure to hold an IP address int sd socket descriptor int port protocol port number 2 char host pointer to host name int ia number of characters read ibuf 100 buffer for data from the server char obut 10017 buffer for data to the server a WSADATA wsaData WSAStartup 0x0101 amp wsaData memset char amp sad 0 sizeof sad clear sockaddr structure sad sin family AF INET set family to Internet E 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 if gt 2 if protocol port specified 27 port atoi argv 2 convert to binary else port PROTOPORT use default port number T if port gt 0 test for legal value f 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 82 85 www audiomatica com CLIO EXPLAINED WITH APPS if argc gt 1 host argv 1 else host localhost Convert host name to equivalent IP address and copy to sad ptrh gethostbyname
12. cscccccccsecccceccuccececcuccsececaseesuseuaneeenaess 7 1 DIRECTORIES CREATED BY CLIO 7 2 PRODUCTION REPORT FILES ceeee ee eee nennen rne rris 7 3 AUTOSAVED DATA 7 4 STATISTICAL INFORMATION ON MEASURED 2 2 2 7 5 SERIAL NUMBER 8 INTERACTING WITH EXTERNAL 8 1 INPUT SENSITIVITY AND OUTPUT VOLTAGE 8 2 QCBOX MODEL 5 DC OUTPUT Rev 04 14 www audiomatica com CLIO EXPLAINED WITH APPS 8 3 CLIOQC AMPLIFIER amp SWITCHBOX 0 44 444 84 EXTERNAL TRIGGER d 8 5 TTL SIGNALS GENERATION us KE Rb dut 8 6 TIME DELAYS GENERATION ceee eI ener eren nnn nnns 8 7 PARALLEL PORT SIGNALS een nnns 8 8 QCBOX MODEL 5 DIGITAL I O SIGNALS 8 9 RS 232 SERIAL PORT 0 0 10 COMPLETE EXAMPLE FAST SINGLE TEST LOUDSPEAKER 10 1 HARDWARE 10 2 MEASURING THE REFERENCE FREQUENCY 10 3 MEASURING THE REFERENCE IMPEDANCE
13. 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 81 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 8 A CLIENT APPLICATION TO CONNECT TO TCP IP SERVER A fully commented sample client console application that is able to connect to CLIO request measurements and receive results follow clio client c code for example client program that uses TCP finclude windows h include lt winsock h gt include lt stdio h gt include lt string h gt define PROTOPORT 1234 default protocol port number extern int errno char localhost localhost default host name 4 CRIT I NITE a MN Program clioclient Purpose allocate a socket connect to the Clio Server interact with the QC environmet Syntax client host port host name of a computer on which server is executing X port protocol port number server is using Note Both arguments are optional If no host name is specified the client uses localhost if no protocol port is specified the client uses the default given by PROTOPORT int string length char str main argv
14. 1 DESKTOP AND WINDOWS MANAGEMENT The CLIO desktop as default behavior automatically handles the measurement windows needed for the QC test 1 Closes unnecessary open windows 2 Maximizes the graphical display of each window 3 Tiles the open windows to fill the desktop C CLIO 11 ELECTRICAL amp ACOUSTICAL TESTS Le FFT Response GOOD Voltage 3002 THD 0 003 T ell LIH Het Ltt f 1111 E 222 A 100 500 100 200 500 1k gt Ek 10k UNIT N 3 TIME17 893s ir CHB INO Response GOOD Response coon ERES Response ILLU Response 47 01 2014 18 19 27 26000 so LEE 10 0 200 500 100 200 500 tk 2k Sk 10k Hz 80k Filename cliofwshortqcman qc UNIT N 4 READY InputA 50 tem 0dBV cers odBV amp Ga Ge 100V 192kkz It is possible to disable the automatic management of the windows using the TILEWINDOWS keyword Add GLOBALS TILEWINDOWS 0 Then resize the measurement windows as you like Their relative positions and sizes will not be changed until next software run 23 85 www audiomatica com CLIO EXPLAINED WITH APPS cuo 11 ELECTRICAL amp ACOUSTICAL TESTS e m x
15. 2 UPPER LIMIT DATA 3 UPPER LIMIT DATA 10 UPPER LIMIT DATA Select one calculated curve for display THD DISPLAY For Fast Track Rub amp Buzz QC check do the following 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 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 39 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 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 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
16. 3000 eas 5000 41 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 6 10 MULTIMETER LIMITS FILES The following limits file defines a multimeter QC check UPPER LIMIT DATA VOLTAGE 0 78 0 01 LOWER LIMIT DATA VOLTAGE 20 77 0 0001 The parameters available are PRESSURE VOLTAGE FREQUENCY IHD IMD 42 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 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 de
17. OC EXPLAINED WITH APPS 200 20 L200 20 LOWER LIMIT DATA 20 20 91 20 60 90 au 100 E 200 EX L200 20 This 20 wide mask spans from below resonance to slightly higher the ZMin region and opens up to 30 in resonance region x v DOOD iar tisr s rir rir ir AA _ AN 211 MEME 20 50 100 200 500 1k 2k Hz 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 and ZMin to be within 10 from reference TSPARAMETERS PERCENT 1 DIAMETER 10 REDC 2 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 62 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 10 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 sinusoidal 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 f
18. 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 17 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 later If autosaving is active CLIO will give the following names to files tcpresponse txt measurements exported in ASCII tcpresponse mlis MLS measurements tcpresponse sin Sinusoidal measurements tcpresponse fft FFT measurements tcpresponse met Multimeter measurements 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 18 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 4 HANDS ON QC 4 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 CO
19. You can select and configure a COM port for QC control within CLIO Options QC 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 74 printer GLOBALS OPENSERIAL 1 SERIALMONITOR 1 IF ALL GOOD SERIALOUT XA LHA40 100 F020 10 AD FDG SERIALNUMBER FS XZ Note the SERIALNUMBER acronym that is used to output the current serial number It is possible to activate mainly for debugging purposes a monitor window that echoes RS 232 activity to do this use the SERIALMONITOR keyword OC R5 232 Monitor Fa OUT LH40 100 F 20 10 AD FD FS pni OUT LH40 100 FOZO 10 AD FD 2 FS E The same text output in the above example could be saved in an ASCII file and loaded with the SERIALOUTFILE keyword IF ALL GOOD SERIALOUTFILE SERIAL TXT 55 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 10 COMPLETE EXAMPLE FAST SINGLE TEST LOUDSPEAKER QC 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 response Sensitivity Po
20. 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 REFERENCE MYREFERENCEFILE MLS LIMITS MYLhIMITSELLDE ILIM 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 LIMITS MYLIMITSPILE DLIM 11 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 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 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 BlI 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
21. analysis we suggest 1 48 or 1 24th of octave smoothing The analysis leads to the following situation CLIO Uu A You can see the response of a good and a rubbing 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 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 8 ACOUSTICAL TESTS SHBB76 2 Heo T X gt 1 b b Rena 45 1724 Octave mits My mala i dBi A 0dBV a npaB 0dBV a v 8 p 124 Ow 150dBu v a 79 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 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 s
22. 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 the 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 that control more than one QC test workstation 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 CLIO11 Clio exe TCP CLIO will run and start listening on the port defined in the CLIO Options gt QC settings dialog see chapter 19 being port 1234 the default one GC TCP server settings Part 1234 Cancel The CLIO desktop will also show this particular operating condition in the main toolbar t From this moment it is possible to connect to CLIO and receive the various measurements services that it is capable of 13 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 3 2 CONNECTING TO THE QC SERVER It is possible to conn
23. file definition with sensitivity data SENSITIVITY UPPER 109 103 10 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 Rt d ggo ag gig eag ag A B ae wo THU tT ET ellie LLL LL LLLI SL LUE ELI ET EL LLL LLLI LLL o ooa 20 50 100 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 check mask may be defined as follow RELATIVE PERCENT 1 UPPER LIMIT DATA 20 20 50 20 60 30 90 30 100 20 61 85 www audiomatica com CLIO
24. host if char ptrh NULL fprintf stderr invalid hosts 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 1 if host argument specified id fprintf stderr cannot map tcp to protocol number exit 1 Create socket sd socket PF_ 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 fprintf stderr connect failed n exit 1 Wait a little n 0 while n lt 1000000 n n Get greeting message 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 exitNin fgets obuf 127 stdin send sd obuf string length obuf 0 0 while lt 1000000 n recv sd ibuf sSrzeot rbut 0 write 1 ibuf n Close the socket closesocket sd Terminate the client program gracefully exit 83 85 www audiomatica com CLIO EXPLAINED WITH APPS int string length char str int i for i 07 4 amp 80 Ik Le str i 0 return i You can downlo
25. is shown below note the eight output bits and the start trigger pulse in input 53 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 legacy devices like LPT ports The TTL signals generated with the OCBox 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 amp LPT Controls IN 3 DC IN 4 DC Qut Current Qut Load 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 TTL TURNTABLE CONTROL BIT INPUT BITS OUTPUT BITS QCBOX MODEL 5 DIGITAL IO 54 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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
26. keyword in the form keyword As an example this is a script composed by two sections one defining global variables the second defining an MLS amp LogChirp measurement GLOBALS COMPANY MY COMPANY IITLE MY QUALITY CONTROL BATCH MY PRODUCTION BATCH NAME MLS OUT 1 000 V INA 0 0 REFERENCE MYREFERENCE MLS LIMITS MYLIMIT LIM 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 PERFORM MEASUREMENT REPORT STATISTICS QC TEST MEASUREMENTS amp BATCH BAD ENDED NO MANAGEMENT YES QC TEST ALL RESULTS 2 GOOD GOOD 7 Figure 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 8 85 www audiomatic
27. limits file defines a single point level check with a frequency mask aligned to it ABSOLUTE LEVEL UPPER 3 LOWER 3 ALIGNFREQ 5000 ALIGNLEV 90 UPPER LIMIT DATA 200 300 800 1 000 3000 4000 7000 15000 LOWER LIMIT DATA 200 5 300 2 10000 x 15000 No NM ON N OI The align point the example 90dBSPL 5000Hz 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 BJMLS Level 0 22dB GOOD ile E TA MLS Level0 22dB GOOD Bo m MC Yt POINT 90dBSPLQ5000Q SED CALCULATE LEV 700 108 0 60 0 180 0 100 1k 10k Hz Figure 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 The level shift means that the curve is displayed with a level different from the measured one 35 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 2 91010 5 2000 10 4000 10 LOWER LIMIT DATA 200 200 LOQO 15
28. session will be created report information and review operation will only apply to the new session 5 6 THE SKIP LAST BUTTON When a QC test is finished it is 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 unit as SKIPPED 27 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 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 or if an aligned point is defined see later LOAD LIMITS FILE REFERENCE GET ALIGN POINT CALC
29. test automatically proceeds until the end Fig 2 depicts such a situation 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 12 Fig 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 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 9 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 third flow diagram in Fig 12 shows us how the single QC measurement is performed As outlined before CLIO QC rel
30. that may be produced by other applications or CLIO itself The upper txt file may look like Freq Hz dBV 5 500 D 5000 1 10000 5 29 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 6 1 ABSOLUTE VS RELATIVE FREQUENCY LIMITS The following limits file defines an absolute frequency limit ABSOLUTE UPPER LIMIT DATA 200 100 300 ou 10000 97 15000 100 LOWER LIMIT DATA 200 92 300 85 10000 85 15000 82 The frequency mask is shown in the first image below miss ga20s E Jem mies E The following limits file defines a relative frequency limit RELATIVE UPPER LIMIT DATA 200 2 300 2 10000 2 15000 z LOWER LIMIT DATA 200 cS 300 2 10000 m 15000 x The frequency mask is shown in the second image above 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 30 85 www audiomatica com CLIO OC EXPLAINED WITH APPS differ by 2 in the 300 10000Hz r
31. 00 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 checks 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 SENSITIVITY FREQ1 500 FREQ2 1000 FREQ3 2000 UPPER 102 LOWER 100 MLS Response GOOD Sensitivity 101 84dB GOOD 25 MLS Response GOOD Sensitivity 101 84dB GOOD 36 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 6 5 FLOATING LIMITS VS FLOATING CURVES When an average or single frequency level check is defined 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 D 300 2 10000 2 1 50 0 5 LOWER LIMIT DATA 200 2 200 2 10000 2 15000 e In this case the measured curve is presented on screen with correct values while the limits curves are moved around it 37 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 t
32. 20 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 od p bee MY COMPANY MY QUALITY CONTROL BATCH My Batch DATE 06 06 02 INITIAI SN TOL TOTAL TESTS 2 GOOD 2 BAD 0 TEST REPORT UNIT N 102 GOOD 6 46 24 i GOOD MLS Response GOOD C Program files Audiomatica CLIOpci Data My qcMMy Batch LOZ emis 2 GOOD MET Voltage 0 775Vrms GOOD THD 0 006 GOOD C Program files Audiomatica CLIOpci Data My qcMMy Baten 102 2 met UNIT N 101 GOOD 6 46 19 1 GOOD MLS Response GOOD C Program files Audiomatica CLIOpci Data My qc My Batch 107 1 2116 44 85 www audiomatica com CLIO EXPLAINED WITH APPS 2 Voltage 0 775Vrms GOOD 0 006 GOOD C Program files Audiomatica CLIOpci Data My qcMMy 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 THD 0 0006 GOOL 06 06 02 6 46 24 UNIT N 102 GOOD 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 Mu
33. A B difference between channels in a stereo measurement Sinusoidal THD Single harmonic or 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 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 31 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 FREQHI 5000 FREQLO 400 UPPER LIMIT DATA 200 9 300 2 10000 15000 D LOWER LIMIT DATA 200 gt 200 u 10000 A 15000 E 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 figure MLS Level 0 09dB GOOD _ ial x E esr E 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 The next figure shows such
34. IO EXPLAINED WITH APPS CYCLICSROGERSCYGCL QC SCYChICEIRSTAI 4 OUTUNITS V OUTQCBOX 2 83 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 OE TINPUTI MLS REFERENCE ZNEARFIELD MLS LIMITS NEARFIELD LIM SE TPINPUTZ MLS REFERENCE FPFARFIELD MLS LIMITS FARFIELD LIM SETISENSE SIN 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 the 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 SOAVEFOLDER OUTUNITS V OUTQCBOX 2 83 IN 20 The rest of the cyclic sc
35. MPANY MY COMPANY IITLE 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 this is a correct comment line COMPANY this comment is not allowed With an understanding of these brief notes you are ready to write a QC script 4 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 sometimes 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 o
36. PREO1 QC LEV1 LIM A LIM B LIM C LIM ASHIFT SPRO You can download these example files from Audiomatica website GLOBALS COMPANY AUDIOMATICA S R L FLORENCE TITLE PREOI TEST PROCEDURE INTERACTIVE 1 SAVEONBAD 1 PERFORM 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 OUT 17 56 IN 10 REFERENCE FILTER MET LIMITS LEV1 LIM FSLN OUT 10 IN 10 REFERENCE A GSIN LIMITS A LIM PROCESS ASHIFT SPRO PERFORM MESSAGE FILTER ON DIP OFF ON OFF ON SIN OUT 10 IN 10 REFERENCE A GSIN 69 85 www audiomatica com CLIO EXPLAINED WITH APPS LIMITS B LIM PROCESS ASHIPFT SPRO PERFORM MESSAGE FILTER ON DIP OFF OFF ON ON OUT 10 IN 10 REFERENCE A SIN LIMPEISSC hIM PROCESS ASHIFT SPRO PERFORM MESSAGE SET DEFAULT SETTINGS FILTER OFF DIP ON OFF OFF ON 70 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 2 THE AMPLIFIER amp SWITCHBOX UNDER QC CLIOQC Model 4 Ampli SwitchBox ISense To CLIO 5 Ohm 1 This example details the quality control procedure that Audiomatica uses to test its production of CLIOQC Amplifier amp Switchbox A precision 5 Ohm 10W 1 resistor is needed and must be connected
37. ULATE LIMITS CURVES Figure 27 Fig 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 or a single point aligned level check 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 CHECK RESPONSE CALCULATE LEVEL SHIFT LIMITS FINAL ALIGN POINT WES CURVES RESULT NO CALCULATE LEVEL IN CHECK LIMITS BAND LEVEL Figure 28a frequency plus average level check 28 85 www audiomatica com CLIO EXPLAINED WITH APPS NO MEASUREMENT CHECK RESPONSE YES CALCULATE SENSITIVITY DEFINED FREQUENCIES SHIFT LIMITS CURVES CALCULATE SENSITIVITY IN LIMITS BAND CHECK SENSITIVITY Figure 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 LOWER LIMIT DATA FILE LOWER TXT The files uppertxt and lower txt are export ASCII files
38. a com CLIO EXPLAINED WITH APPS 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 11 and 12 Fig 11 zooms the entire QC test sequence adding the blocks in red while Fig 12 zooms the Perform Measurement block the blue one LOAD QC SCRIPT MANAGE PERFORM AUTOSAVE OR MEASUREMENT AUTOEXPORT single CYCLIC SCRIPT FIRST SHOW MEASUREMENT IF DISPLAY WAIT FOR USER MODE OR TRIGGER TO START QC TEST RESULT SHOW AND PROMPT IF INTERACTIVE MODE YES LOAD amp EXECUTE CYCLIC SCRIPT IF TIME TO SHOW MEASUREMENT DISPLAYONBAD REPORT STATISTICS amp BATCH MANAGEMENT TAKE USER DEFINED ACTIONS CONDITIONED BY THE RESULT OF THE SINGLE MEASUREMENT TAKE USER QC TEST DEFINED ACTIONS NO BAD CONDITIONED BY THE RESULT OF ALL QC TEST ALL RESULTS MEASUREMENTS GOOD ves GOOD 7 Figure 11 Three different operating modes are outlined here the DISPLAY mode the INTERACTIVE mode and the DISPLAYONBAD mode YES NO MEASUREMENTS If none of these modes are active the QC test proceeds without any measurements shown with simple go no go masks as in Fig 1 If DISPLAY mode is active then the executed measurements are shown and remain on the screen for a definable amount of time the
39. 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 30524141 48 32 143 15 48 76 445 16 60 49 1920402 Sic me 2925 35 20 T9 x mrumnsugrngnsmnmmugrnsr 2721 Ra mugrsnmnsnsnmngrnsr CUBILE A 40 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 60 85 www audiomatica com CLIO EXPLAINED WITH APPS 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
40. a situation the title of the measurement control panel reports the level check 32 85 www audiomatica com CLIO EXPLAINED WITH APPS BIMLS Level 0 09dB GOOD Bf x HN CODES JW mes go E 7 BaMLS Level 0 09dB GOOD mu NM CO i E 110 0 DENCY E BAND 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 The level shift means that the curve is displayed with a different level from the measured one 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 shows us the case of a unit is testing bad because the frequency behavior is not good while the average level is OK BSMLS Level 0 15dB GOOD BJ MLS Level 0 15dB GOOD Mm N C2 a 33 85 www audiomatica com CLIO EXPLAINED WITH APPS The last figure 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 BaMLS Level 5 82dB BAD hou RENE 34 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 6 3 ALIGNED MASK The following
41. 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 QCBOX TEST PROCEDURE INTERACTIVE 1 PROMPT MESSAGE 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 PERFORM DELAY 500 STN 71 85 www audiomatica com CLIO EXPLAINED WITH APPS OUT 0 IN 20 REFERENCE IMPEDANCE SINI LIMITS IMPEDANCE LIM SETINPUTI PERFORM DELAY 500 SIN OUT 10 IN 20 RBEBFERENCE ISENSE SINI LIMITS IMPEDANCE LIM FET OUT 10 0 IN 10 ACQUISITIONDELAY 200 REFBERENCE FPT EPRT LIMITSSFFT LIM RESETMUTEB SETMUTEA PERFORM DELAY 500 SIN OUT 10 IN 10 REFERENCE CH SIN LIMITS 2CH LIM PROMPT MESSAGE CONNECT MESSAGEZ2 OUTB gt CH2 SETINPUTZ PERFORM DELAY 500 OLN 5 LIMITS CH LIM RESETMUTEA Yo
42. act form The QC Report panel can be kept open during the tests and it accompanies the work in a really effective visual form Under STATISTICS you find information about QC test and Company names 25 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 5 9 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 E UNIT M4 BAD 9 47 32 ME 1 GOOD SIN CHA LOOP 2 GOOD MET CHA LOOP 3 BAD SIN CHB LOOP 4 BAD CHE LOOP m UNIT N p RN As soon as a QC sequence is terminated simply open the tree view of your interest identify the measurement you want to insp
43. ad these example files from Audiomatica website 84 85 www audiomatica com CLIO EXPLAINED WITH APPS 85 85 www audiomatica com
44. al GCBox5 Bit 2 Logic Active Low D uration ms 25 we 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 Signals the end of the sweep BIT1 Signals if result is good BIT2 Signals if result is bad The keywords that should be added to our script lead to the following situation PERFORM 66 85 www audiomatica com CLIO EXPLAINED WITH APPS OCBOXOUTBYTE 0 OUTQCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM LIMITSB IMPEDANCE LIM POLARITY 1 PERFORM 1 IP ALL GOOD 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 sinusoidal test this time is usually small but not zero and may range in some hundred of milliseconds depending on the platform chosen If
45. application bar to see CLIO again send SHOWCLIO 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 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
46. ated 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 may employ a lot of processor time The QC Result panel can be forced to appear at the end of the QC sequence pressing the m button 24 85 www audiomatica com CLIO OC EXPLAINED WITH APPS If Shrink QC result is selected in the associated drop down menu the QC result panel will appear in a minimized version UNIT 3 TIME 17 893s 5 3 THE QC BANNER CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help T Multi Meter The QC Banner is managing information and messages given to the operator while in Interactive mode 5 4 THE QC REPORT PANEL STATISTICS AUDIOMATICA FIRENZE ITALY CWBoxFW DATE 17 01 2014 INITIAL SN 1 TOTAL TESTS 4 GOOD 3 TEST REPORT H UNIT N 4 GOOD 15 23 37 UNIT N 3 GOOD 15 19 27 H b UNIT N 2 GOOD 15 18 22 UNIT N 1 BAD 15 17 15 1 GOOD MET 2 GOOD MET 3 GOOD 4 GOOD MET 5 GOOD CHAIN 0 GOOD CHB IN 0 7 GOODFFT 8 BAD FFT 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 comp
47. d these commands to CLIO we get the following localhost CRT File Transfer Script Window Help BBQ sea es Welcome to Clio Remote Server 51 200 Additional Command OUT 1 000 Y 0 200 Additional Command 200 Additional Command UK 0 _00 MLS 200 Additional Command OF 200 Additional Command LIMITS LO0PMLS 200 Additional Command Edit View Options 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 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 LUUPKLS LIM OO Additional Command C O00 GUOD P 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 15 85 www audiomatica com CLIO QC EXPLAINED WITH APPS participate to the global result TO see more tests in action we may add a level check and a polarity t
48. e 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 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 58 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 1 QA uvmnrmrmurisrisrimrlir i r AB H4 T HIN rt NAWA _ HUE LL LLL al L LI Wee a eT LRL Ceo CC 0 0 20 50 100 200 500 1k 2k Hz 5k 10k 20k 120 0 dBSPL LL EN mer EN LLL After the measurement is done we may inspect THD and Rub amp Buzz pressing the relative butto
49. e 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 OUTQCBOX 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 OUTQCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM 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 OBENSITIVITY UPPER 109 LOWER 103 UPPER LIMIT DATA 20 10 80 10 TOO 3 5000 S 6000 20000 5 LOWER LIMIT DATA 20 80 IOO E 5000 EU 6000 20000 E THD UPPER LIMIT DATA 64 85 www audiomatica com CLIO EXPLAINED WITH APPS o9 74 96 oS 622292 90 10024472 KE 10909 9290 64 109094 90 64 LRUBTBUAZZ DISPLAY RUB BUZZ UPPER LIMIT DATA A 526 20 LT 48 143 15 48 445 16 OU 092 207 297 E S 20 The final imedance lim file will be RELATIVE PERCENT 1 UPPER LIMIT DATA 20 20 50 20 60 30
50. ect and double click on its name 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 The following diagram describes such a process compare it with Fig 12 26 85 www audiomatica com CLIO OC EXPLAINED WITH APPS DOUBLE CLIK LOAD ON REPORT LOAD LIMITS REFERENCE TREE VIEW FILE FILE BAD LOAD MEASUREMENT FROM DISK CALCULATE OPTIONAL PARAMETERS DISPLAY RESULT REVIEW MEASUREMENT 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 Figure below 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 E Sinusoidal Response GOOD Level 9 83dB GOOD 1k Hz Filename rog sin dBSPL Resolution 1 6 Octave 1 3 Octave Delay ms 0 000 Dist Rise dB 0 00 Note the review operation can be done only when inside a QC session if CLIO is exited then later QC is started again a new QC
51. ect 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 not connected CRT Quick Connect Protocol telnet Hostname localhost Port 234 Use firewall to connect Show quick connect on start up Save session 1 24 Rows 80 Cols VT100 As soon as the connection is invoked the CLIO QC server will answer with the welcome greeting Ill localhost CRT File Edit View Options Transfer 2 g im A XQ L3 ES Helcome to Clio Remote Server Script Winc The connection is established QC services are ready for you 14 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 described later My First QC Script The syntax is identical MLS OUT 1 000 V 0 0 REFERENCE LOOP MLS LIMITS LOOPMLS LIM If we sen
52. egion 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 30 0 10 20 500 1 10k 20k 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 Sensitivity average or up to eight frequencies
53. elative menu it contains most of the settings 10 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 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 2myreferencefile 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 2 4 THE LIMITS FILE The Limits File is 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 UPPER LIMIT DATA 100 5 500 3 5000 1 10000 5 LOWER LIMIT DATA 100 EXE 500 E 5000 10000 SO 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 REFERENCE MYREFERENCEFILE MLS LIMITS MYLIMITSFILE LIM An interesting keyword to
54. est To do this we must add the following to the limits file loopmls lim LEVEL UPPER 2 LOWER 2 And we must add the following to the commands sent POLARITY 1 We get the following situation Y _ CLIO ELECTRICAL amp ACOUSTICAL TESTS File Ana lysis Controls Window delp un SC GOOD wem Level 0 13dB GOOD un Polarity G GOOD U localhost CRT File Edit View Options Transfer Script Window Help j E ES E 200 Additional Command OK 00 MLS 200 Additional Command LIMITS LUOPMLS LIM 200 Additional Command OK FULRRITY 1 200 Additional Command OK CI 200 GOOD 200 GOOD Response 200 GOOD Level o ls3dB b GOOD Polarity QC DISPLAY InputA dBi Input COD EXCEPT Telnet 19 1 24 80 Cols YTLOO 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 16 85 www audiomatica com CLIO EXPLAINED WITH APPS HIDECLIO CLIO will disappear and remain minimized in the Windows
55. 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 Report Edt Favortes Help uc dz x purse Up Cut Copy Paste Undo Delete Properties 23 05 02 17 27 43 txt Text Dacument Modified 23 05 02 17 27 Size 257 bytes 40020252 40020255 40020256 Figure 8 File Edt Go Favorites Help DELE EE 042 42 pups Up Cut Copy Paste Undo Delete 4002255 1 4002259 2 Select an item to view its 4002237 1 4002237 2 description 25 4 ce 02239 1 25 I c ce nra I E 4002242 1 4002242 2 5 98MB Computer 2 Figure 9 E 7 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 2 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 extension driving this process is called the QC Script The QC script stores information in logical groupings called sections initiated by a bracketed
56. fined CLIO creates the Report directory where all the production report files are saved Fig 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 directory where all data files are saved Fig 38 shows this situation E C3 Data Eg Data 2522 My ge BU _ Autosave 171 Report Gg Report om Figure 37 and 38 3 A Batch is defined and is named Batch A SaveFolder is not defined CLIO creates the Batch directory where all the production report and also data files are saved Fig 39 shows this situation 4 SaveFolder is defined and is named Savefolder CLIO creates the My Savefolder directory where all the production report and also data files are saved Fig 40 shows this situation EL My ac My Batch 1 My Savefolde Figure 39 and 40 43 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 1
57. he 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 Note When a distortion curve is displayed its graphical properties are defined within CLIO Otpions gt Graphics gt QC Curve 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 38 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 Note When a distortion curve is displayed its graphical properties are defined within CLIO Options Graphics QC Curve 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
58. ies 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 SET QC LOAD LIMITS REFERENCE EXECUTE OPTIONS FILE FILE MEASUREMENT BAD CALCULATE OPTIONAL OPTIONAL PARAMETERS LOOP GOOD READY FOR NEXT PERFORM MEASUREMENT OUTPUT Figure 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 2 2 THE CYCLIC QC SCRIPT Again with reference to Fig 11 the last red block right before the end of the QC test represents the QC Cyclic Script execution The cyclic script is a particular sequence of QC operations that needs to be executed regularly either As first action when beginning a QC session After a certain number of QC tests have been executed This is useful for testing and re testing reference quantities that characterize the entire process and maintain traceability to environmental conditions like production golden samples 2 3 THE REFERENCE FILE The Reference File is a standard CLIO measurement file extension mls fft or met created within its r
59. ifier OUTQCBOX 2 83V 8 2 QCBOX MODEL 5 DC OUTPUT CONTROL The QCBox Model 5 Amplifier amp SwitchBox has 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 QCBOXDCOUT 2 47 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 8 3 CLIOQC AMPLIFIER amp SWITCHBOX CONTROL Custom keywords have been implemented to easily control all the internal functions of this unit SETINPUT1 Selects input 1 of the CLIOQC Amplifier amp SwitchBox SETINPUT2 Selects input 2 of the CLIOQC Amplifier amp SwitchBox SETINPUT3 Selects input 3 of the CLIOQC Amplifier amp SwitchBox SETINPUT4 Selects input 4 of the CLIOQC Amplifier amp SwitchBox SETINPUT5 Selects input 5 of the CLIOQC Amplifier amp SwitchBox SETINPUT6 Selects input 6 of the CLIOQC Amplifier amp SwitchBox SETINPUT7 Selects input 7 of the CLIOQC Amplifier amp SwitchBox SETINPUTS8 Selects input 8 of the CLIOQC Amplifier amp SwitchBox SETIMPEDANCE Selects impedance mode of the CLIOQC Amplifier amp SwitchBox SETISENSE Selects I Sense mode of the CLIOQC Ampli amp SwitchBox 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 opera
60. larity 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 cycle times of 1 to 2 seconds with a sweep time of around 1s 10 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 D O S o2 Z2 e CHOQC we 2 00 TO CUO FROM CLIO 4 5 i E 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 start signal to the QC test and is informed by three output bits of its current status 56 85 www audiomatica com CLIO EXPLAINED WITH APPS D BTI To Automation NANS DIGITALI O QCBox Model 5 To From In In Ina
61. lowing SN Voltage THD TOT uoyT 006 IOS Ou 19906 ASO Os T 4 900 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 7 5 SERIAL NUMBER MANAGEMENT There are several ways to handle the serial numbers of your devices and to maintain their coherence through 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 30 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 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 O if you want only good units to have a serial number report statistical and autosave management this works also when AUTOSN O The ope
62. lti Meter THD 0 008 0 77 5 Voltage 0 775 Vrms ES MLS Response GOOD Dok B Quality 27 Pl x Figure 3 Completed test information and reports are always presented to the user E Pn STATISTICS AUDIOMATICA FIRENZE ITALY CWBoxFW DATE 17 01 2014 INITIAL SN 1 TOTAL TESTS 4 H UNIT N 4 GOOD 15 23 37 H UNIT N 3 GOOD 15 19 27 H UNIT N 2 GOOD 15 18 22 i unm na BAD 15 17 15 1 GOOD MET GOOD MET GOOD MET GOOD MET GOOD CHA IN 0 GOOD CHB IN 0 GOOD FFT BAD FFT Figure 4 5 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 1 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 control test relies on real measurements saved on disk and on a simple text script my first B x Ele View Favorites Help E cunc 81 9 UG Back Forward Up Cut Copy Paste Undo Delete Properties Report loop loop loopmet my first qc Select an itern to view its description loopmis po DBEKB E My Computer 2 Figure 5 Defining 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
63. ltimeter 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 1101 1 mls 1101 2 met 1102 1 mls 1102 2 met As you see the QC single test numbering is integral part of the name of the autosaved data file 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 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 testnumber txt for each response test defined containing the average response minus twice the standard deviation for that test 45 85 www audiomatica com CLIO EXPLAINED WITH APPS The statistical files keep track of the all the units saved within a batch even if the production is stopped and then restarted Lets now see what the data table txt looks like Supposing the same case of 19 7 2 after two tests we would have the fol
64. ns 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 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 LO LOQ 3 5000 S 6000 E 20000 5 LOWER LIMIT DATA 20 10 80 10 100 E 5000 6000 m 20000 BS AAA Z YT NEN ET ll 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 sii B TN 59 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 sinusoidal graph at the end the QC limit definition panel will be filled with data about the drawn limit THD UPPER LIMIT DATA OUI 69 50 174 96 bos ie 06299492 90502 10054029 3 9 1 9 10869 90 64 25 20669 90 04 29 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
65. 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 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 QC related It is a good idea to dedicate a directory for each QC test The files involved here are 68 85 www audiomatica com CLIO QC EXPLAINED WITH APPS
66. onditioned 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 measurement LPT Parallel Port case GLOBALS INITIALBITS 0 ER T MLS IF LAST BAD BIT 3 BITVALUE 1 DELAY 200 IF LAST GOOD 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 next figure 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 50 85 www audiomatica com CLIO EXPLAINED WITH APPS bit 3 bit 1 bit 0 load setup bit 3 bit 1 bit 0 load setup start start FFT FFT MLS bad MLS good 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 FFT MLS IF LAST BAD QCBOXOUTBIT3 1 DELAY 200 LAST GOOD 0 DELAY 200 IF ALL GOOD 1 PERFORM 1 DELAY 200 PERFORM
67. onse 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 CY CLIGC MOUTHEO OC CYCLICFIRST 1 REPETITION 100 PERFORM MESSAGE PLACE TELEPHONE IN PLACE SIN OUT 4 7 IN 10 EOREFERENCE MOUTH SIN REFERENCE REFPHONE SIN LIMITS PHONE LIM You can download these example files from Audiomatica website 77 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 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 the 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
68. ophones 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 the 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 74 85 www audiomatica com CL
69. or 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 Iw Ohm Aight Scale Delay m 5 7 ntemal 0 180 f OC Box Select Distortion Auto Delay R amp B Enabled Freg Max Hz W THE Enabled 15000 Freg Hz Auto Del Freg Hz 30 10000 Rise dB 0 000 Save Settings 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 mrjmgriar ar 57600008080 AB LLLA 71 _ _ a Gu pm o m 120 0 dBSPL 100 0 CT 11 Fk 20 100 200 500 1k 2k Hz 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 63 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 10 5 PROGRAMMING THE QC SCRIPT We are ready to write the QC script the files involved are th
70. 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 BlI 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 BI 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 single 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 may ensure you production cycle times 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 The quality control engineer responsible for production line operation The company and its managers controlling the overall process QC operations can be password protected file operation can be restric
71. rator under her or his judgment can force the final result of a bad test if the keyword PROMPTFORGOOD 1 is used 46 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 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 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 ampl
72. ript 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 75 85 www audiomatica com CLIO OC EXPLAINED WITH APPS onlin POT MLS REFERENCE NEARFIELD MLS LIMITS NEARFIELD LIM SAVENAME NEARFIELD SAVEPROMPT 1 SETINPUTZ MLS REFERENCE FPFARFIELD MLS LIMITS FARFIELD LIM SAVENAME FARE IELD SAVEPROMPT 1 SETISENSE LS IN OUTQCBOX 1 IN 30 REFERENCE IMPEDANCE SINI LIMITS IMPEDANCE LIM SAVENAME IMPEDANCE SAVEPROMPT 1 You can download these example files from Audiomatica website 76 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 11 5 QC 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 cyclic script moutheq qc is needed to measure and save the output pressure response of the reference speaker or mouth at reference position GLOBALS AUTOSAVE 1 SAVE FOLDER 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 resp
73. single channel measurements of the two quantities and finally integrate them into a single stereo one 57 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 10 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 the 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 TOdBV 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 vri v wUurmrrmrpsr ag a 120 0 i wt at DIU LLL wo CT ee 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 fin
74. sor 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 1 000 V 0 0 REFERENCE LOOP MET LIMITSSLOOPMET 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 26 shows the test at its end cuo 11 ELECTRICAL amp ACOUSTICAL TESTS Ex Multi Meter Voltage 1 000V GOOD THD 0 001 GOOD Voltage 1000 v THD 0 001 1 3 10 0 20 0 50 0 100 200 500 1k 5k 10k 20k Quality Control OCKE w e B n 2 0 Response GOOD 2 GOOD MET Voltage 1 000V GOOD THD 0 001 GOOD 11 02 2014 15 17 33 UNIT N 4 GOOD Filename UNIT N 5 READY Figure 26 This concludes our first approach to QC script writing and debugging the files necessary to study this lesson are downloadable from Audiomatica website 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 22 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 5 RUNNING A QC SCRIPT The QC environment can be programmed to act in several ways while presenting the operator different interactive panels to customize her his user experience 5
75. t line COMMENT FREQUENCY RESPONSE Click on the P 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 24 the text display should now present information on the executed test 20 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 11 ELECTRICAL amp ACOUSTICAL TESTS MLS Response GOOD gt aja amp 1 GOOD MLS Response GOOD 11 02 2014 15 11 02 UNIT N 1 GOOD Filename UNIT N 2 READY Figure 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 generator button to switch the generator on and play the default 1kHz sinusoid Now press T to stop measuring save this measurement as loop met Fig 25 should be what you have in front of you 11 ELECTRICAL amp ACOUSTICAL TESTS MLS Response GOOD Filename loop met CHA Fast Filename UNIT N 2 READY Figure 25 Now press Ctrl Q and then L to go back to inputting a limits file definition Input the following 21 85 www audiomatica com CLIO EXPLAINED WITH APPS UPPER LIMIT DATA VOLTAGE 1 1 0 01 LOWER LIMIT DATA VOLTAGE 0 9 THD 0 0001 Save this as loopmet lim Now click on the a button and position the cur
76. ted by their digital signature 3 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 1 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 UNIT N 5 Bad READY S Zmes OX R gt dip A apy a v ie v ae gt a Q NALD Figure 1 A more complex operation foresees the continuous display of the measurements executed until the reaching of the final result CLIO ELECTRICAL amp ACOUSTICAL TESTS DER Pio Anaya Controls Window Help na aaa 7 Y TE LEVEL THD_ Voltage 0 774Vrms GOOD 0 0 005 GOOD ax 0 774 Vrms TH 0005 E 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 InputA QdBV a w InputB 0dBV a v 448 0 0dBu v a 4 404 C Figure 2 A third possibility is to view and interact with the test sequence during its 4 85 www audiomatica com CLIO QC EXPLAINED WITH APPS execution CLIO ELECTRICAL amp ACOUSTICAL TESTS File Analysis Controls Window Help iz T Mu
77. the QC control panel and by the MANUAL keyword inside the QC script Figure shows a foot pedal switch and shows its connection to the PC to enable the control of the QC test LPT Start xi j 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 SN ae S 2 No D pem Sox sm CAUTION QUALIFIED PERSONNEL 50 60Hz 150W LIN REFER SERVICE AC POWER 100 240V e 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 later paragraphs and to the commands reference for more details on TTL input signal management 8 5 TTL SIGNALS GENERATION CLIO QC has powerful capabilities to generate and read TTL control signal to be able to interface with an external line automation To manage these TTL signals it is possible to use 1 The parallel port of the computer if present 49 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 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 c
78. 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 limits 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 0 3 QTLOWER 0 05 QEUPPER 0 3 QELOWER 0 05 QMUPPER 5 OMLOWER 2 FSUPPER 90 FSLOWER 50 REDC 5 5 UPPER LIMIT DATA 7 yo L424 995 10 22 LOLE 1024 15 Tog pe 1 52 192 LOWER LIMIT DATA uU vo Tu 9 45 229 SOQ o4 93 415 99 1408 2 0 21 06 99449 269 Ciga 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 27 95 ZMINLOWER 7 40 85 www audiomatica com CLIO OC EXPLAINED WITH APPS 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 gt 200 3000 bes 5000 gt LOWER LIMIT DATA 100 200 slog
79. tion Ranges from 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 21 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 QCBOXOUTBIT5 Status 1 or O of the bit that will be output from Model 5 BIT5 48 85 www audiomatica com CLIO EXPLAINED WITH APPS 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 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 QC This operation is controlled by the External Trigger button in
80. u can download these example files from Audiomatica website 72 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 3 A TEST ON A STEREO ELECTRONIC EQUIPMENT CLIOfw 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 PREOI B20 SIN LIMLTOA AB LIMITSB AB BLIM You can download these example files from Audiomatica website 73 85 www audiomatica com CLIO EXPLAINED WITH APPS 11 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 speakers The hardware setup is shown in figure INPUTA INPUT B C L OUTPUT OUTPUTB gt Mic No 1 Mic No2 From CLIO 4 CLIOQC Ampli SwitchBox To CLIO Speaker far field near field As you can see we employ a CLIOQC Amplifier amp SwitchBox that connects two measuring micr
81. uperimposed 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 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 80 85 www audiomatica com CLIO EXPLAINED WITH APPS amp LPT Controls Y u IN 3 DC IN 4 DC Out Current Out Load Under a QC script it is possible to apply DC with the following synthax PERFORM QOCBOXDCQUTS1 2 SIN REFERENCE RESPONSE SIN LIMITS RESPONSE LIM PERFORM OCBOXDCOUT 1 2 SIN REFERENCE RESPONSE SIN LIMITSSRESPONSE LLM 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
82. utput 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 23 Expand the display to obtain 2dB div ans set upper Y scale value to 4dBV Save this measurement as Loop mls 19 85 www audiomatica com CLIO EXPLAINED WITH APPS LogChirp Frequency Response S oo 3 L T d e CHA dBV Unsmoothed 0 000 ci a rpg gi F3 7 118 119 50 0 100 200 500 1 Hz 2k ok 10k 206 Filename loop mls CHA dEV Unsmoothed 48kHz 16K Rectangular Start0 00ms Stop 34l 31ms FreqLO 2 93 gt Length 341 31r Figure 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 Text mode Input the following frequency masks as limits UPPER LIMIT DATA 20 30 0 0 20000 LOWER LIMIT DATA 20 20 15000 er 20000 DO 1 DO 1 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 1 000 V 0 0 REFERENCE LOOP MLS LIMITS LOOPMLS LIM It is a good practice to add the following commen
83. 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 0 SIN OUTQCBOX 1V INA 10 INB 30 REFERENCE REFERENCE SIN LIMITSA RESPONSE LIM LIMITSB IMPEDANCE LIM POLARITY 1 OCBOXOUTBITO 1 ALL 1 1 IF ALL BAD OCBOXOUTBIT2 1 You can download these example files from Audiomatica website 67 85 www audiomatica com CLIO QC EXPLAINED WITH APPS 11 QC APPS 11 1 QC OF A MICROPHONE PREAMPLIFIER PRE 01 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 specifies a response in term of a 0 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

CLIO QC EXPLAINED WITH APPS

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