"user manual"
Contents
1. Verify cinema stero4y yau 1544 Enable pink noise through selected channel Back You are now requested to place the measurement microphone at the reference position The microphone position remains unchanged for all the channels verified in this pro cess Adjust the height of the microphone according to the specification of the cinema engineer Continue with enter Select the channel you want to ver ify Please note that the only chan nels available for the verification are those that have been previously commissioned by the cinema engi neer Confirm with enter Use the pink noise signal generator on your cinema processor or the supplied 20 dBFS pink noise on the channel you have selected to verity Press enter to confirm once the noise signal is playing INTi AUDIO Verify a cinema Werity cinema sero wass Make sure that you have no interfer ing noises present in the theatre no talking and keep the doors shut Start the measurement by pressing enter Press OK to start measurement Back STEP OS 4BU 15 45 EQ 72 1dB 1 3 OCT The measurement starts immedi 1 L Tol 6 6dBt a 466 6H2 P aMrs ately and you see the total time as m well as the remaining measurement time in the bottom right corner The measurement result is displayed after the measurement period has elapsed d ea e50 tk k L SETS 30 ANGE 130 T1085 Mo yg At thi2. Create cinema sterooj lt uav 13 42 A Select cinema parameters and then create cinema Hame MyCinema Size 568 seats ging Averaging LFE CREATE CINEMA gt EXIT Create cinema steron lt yeu 13 43 Select cinema parameters and then create cinema Hame MyCinema Size 566 seats r 66 sec gt CREATE CINEMA gt EXIT Number of seats Freq Hz 30 150 500 1000 1500 2000 Create cinema stron sav 1347 Select cinema parameters and then create cinema Hame MyCinema 566 seats 68 sec 126 sec gt CREATE CINEMA me DE Averaging LFE 2000 OdB 0dB OdB OdB OdB OdB 4000 1 0dB 0 5dB OdB_ 0 5dB 1 0dB 1 5dB 8000 2 0dB 1 0dB OdB 1 0dB 2 0dB 3 0dB Select the averaging time for the frequency response measurements Default is 60 seconds giving a level accuracy of 0 5dB at the lowest fre quency With 30 seconds the lowest frequencies will have an uncertainty of 1dB Select the averaging time for the LFE channel As the LFE handles only low frequencies the default is set to 120 seconds You may now create the template for that cinema by selecting gt CREATE CINEMA and pressing The assistant then creates the folder with the cinema name and gener ates the appropriate tests in that di rectory Please note that all the cinemas are created in the root direc tory Cinema
3. ccccccccssssscecesssssseseesesssnseeeesesssseeees 8 4 Create a New Cinema cccccccccccceeeeseeseeesssesssesenenaenees 9 5 Screen OVGRVIC Wei aio nccccecciess ceceevacss crixe eves cten tet nsieereceis 12 6 Calibrating a Cinema Channel ssseseeeneeees 14 Capturing a Measurement cccceeceeeeeeeeeteeeeeseeeeeee 17 Calculating Average of captured traces 0 ccee 17 Storing a completed channel test cccceeeeeee 18 LONG sea ea e Ee EE 18 FIE Over tEn a 19 Store and create verify teSt 00 cece eeeeeeeeees 19 Discard change Sincero e 20 Show mean deviation cccccccccccesseceeecensseeeeeseees 20 BaCk dounna a A O E 21 Multi tone Headroom test ecceeeeeeeeteeeeeeeteteeeeees 22 Loading a headroom test cccccceeeseeeeeeeeteteeeeees 22 Conduct a Headroom TeSt ceeeeeeeeeesesssseeeeeeeeeeeeees 23 Table of Contents INTi 7 Verify a Ciema ecccccccccceeeeeneeeeseesesesssssssseaneeenaeeeees 24 LOCK int Verify MOE sees c ccecees deeds adenepanetecher etecsonaiad 28 8 View verification reSUuIts cccecceseeesesssssssestteeneeeeeee 29 9 EXIT o e ea e ae E EEEE EASE 31 INTi AUDIO Introduction Thank you for purchasing the Cinema Meter Package for the XL2 Audio and Acoustic Analyzer It is a functional extension for all XL2 analyzers in the market allowing you to efficiently com mission and monitor the audio setup in commercial cinema
4. on the SD card Possible pre existing cinema subdirectories are overwritten if you choose the same cinema name and confirm the overwrite During the creation process numerous messages are displayed informing you about the progress After the successful creation of the measurement template the cinema meter assistant will be back in the main menu ready for the next tasks Create a New Cinema INTi AUDIO INTI Screen Overview AUDIO All the frequency response measurements are based on the 1 12 Oct Tol measurement function This function is auto matically loaded when a cinema is calibrated or verified All required functionality is explained in this manual There is however more in depth functionality explained in the XL2 user manual Here is a typical screen 14 13 1712 Oct HLURB 7 gt yeu 14 54 EI 7 S 75 008 13 oct IS6_SCRE S7 3dB4 466 6H2 11 2 PASSE 50 Bo 1 10 4 a0 sol i663 Z250 ik Hk ABR ICA SET 00 90 38 9 an RAGE tan T 16s Mo yopil Select this to capture measured traces manipulate them and handle tolerance files Shows the actually selected tolerance file and the refer ence level for the tolerance With this you may manually shift the tolerance The overall result and possible spectral violations are shown below Select the YAxis with the rotary wheel amp and confirm with enter Select the zoom factor between 2 5 and 20 and confirm with ente
5. s0 Fi 2012 08 02 14 10 M T L s E 17 Calibrating a channel rte This opens the calculation selector menu offering all captures for the averaging process Select those you want to consider for the calculation by selecting the capture with the ro tary wheel and pressing enter A considered capture is indicated by a black dot 2012 08 02 14 06 2012 08 02 14 09 2012 08 02 14 09 2012 08 02 14 10 2012 08 02 14 10 R a RNGE 130 TOS My 6 Scroll to Calculate Mean and press This calculates the Mean capture You see now that the Mean reading has a time stamp and can be used like any other capture The Mean calcu lation process can be repeated at any time later Leave the menu by pressing ESC STEP OR 4B 14 21 L2 72 5dB 1 3 OCT SOB_SCRE 85 8dBt a 1 666kH2 PASSE 16 63 50 tk k TM Fame 30 RNGE san TOs mo Sig a Calibrate STEP O3 4BU 14 15 How do you want to continue with fRes 1 L_120CT_ Store amp create verify test Show mean deviation 1 2 3 Discard changes 4 5 Back To continue the procedure once you have completed the adjustments and measurements on that specific channel select gt gt Continue lt lt on the top left corner of the measure ment screen You may also reach this by pressing ESC This opens a menu allowing you to define the further use of your ac quired data Option
6. Verify cinema ster oa lt sav 15 50 Verify another channel in this cinema Back INTi AUDIO Yes brings you back to the channel selection menu and No finishes the Verification mode and brings you back to the main menu Confirm your selection with enter This mechanism ensures that you and the cinema engineer always have access to the history of the last eight measure ments They are all complete with date and time stamps Confirm your selection with enter This step completes the measurements for a specific channel In the next screen you will be asked if you want to continue doing measurements in the same cinema but with another channel 27 INTi AUDIO Lock into Verify Mode If you select this menu item you are configuring the XL2 to always boot up in the verification mode This has the strong advantage that the occasional user can easily get to the verifi cation mode Cinema Meter steroo sav 15 52 KA Select a task to start 1 Create new cinema 2 Calibrate cinema 3 Verify cinema 5 View verification results 6 Exit Cinema Meter steroo sav 15 53 KA Lock XL2 into Verify Mode Select UNLOCK after Power up to return to the Cinema Meter menu ok 28 Select 4 Lock into verify mode A confirmation screen appears Se lect OK to activate this locked mode or Cancel to return to the Cinema Meter menu Verify cinema ster ooj lt yeu 1
7. 5 54 Helcome to CINEMA METER Verify Mode UNLOCK In this mode the XL2 analyzer al ways boots up in the locked verifica tion mode Exit the locked mode at any time by selecting Unlock in the bottom left corner View verification results INTI AUDIO ew verity seriws The list represents all channels con Please select channel taining verification results The service technician has verified the cinema channels at vari ous dates This viewer allows you to look at this data and com pare it against other readings Select a channel Cinema Meter ws aga Select 5 View verification results to enter the viewer mode Select a task to start View verify sreros q sav 16 07 I Select a first measurement result 1 Create new cinema D ealibeate cies Select result to view you want to visualize The presented 3 Verify cinema Select Capture ae 4 Lock into aar mode 2012 08 02 15 50 captures show the history of verifi 5 w Verification results 08 1 i 6 cations of that channel Each capture is marked with a time stamp The last capture in the list is the ref erence trace View verify steroo uav 15 59 KI Select the cinema Please select cinema room steros QOD 15 18 Om ou vide 1 3 oct The measurement result is then Aarhus 1 L 30 2 8_8 0d8t a 63 00Hz f f Aarhus 2 E yisualized together with the appli i cable tol
8. AUDIO AL CINEMA METER HANDHELD AUDIO AND ACOUSTIC ANALYZER NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe Tel 423 239 6060 Fax 423 239 6089 E Mail info nti audio com Web www nti audio com NTI Americas PO Box 231027 Tigard Oregon 97281 USA Tel 1 503 684 7050 Fax 1 503 684 7051 E Mail americas nti audio com f aim NTi Audio is an ISO 9001 2008 kw certified company Firmware V2 40 Version 2 40 00 August 2012 All information subject to change without notice All rights reserved Minirator is a registered trademark of NTi Audio TM XL2 EXEL M4260 M2210 M2215 MA220 MR PRO MR2 and TalkBox are trademarks of NTi Audio NTI China Ganglong Lisheng Mansion Room 701 No 60 Suli Road 215168 Suzhou China Tel 86 512 6802 0075 Fax 86 512 6802 0097 E Mail china nti audio com NTI Japan Ryogokusakamoto Bld 1 8 4 Ryogoku 130 0026 Sumida Ku Tokyo Japan Tel 81 3 3634 6110 Fax 81 3 3634 6160 E Mail japan nti audio com Made in EJ Switzerland Table of Contents 1 IATPO AUCH O Missive ccs ioseccnacccc desde ems aaea iaa 4 2 SHAN ATOM 5 esse scessscedsccee cece ccsesids ceccnvexsnescesevccuesbendeselesseweate 6 Update the firmware annann R 6 Install the Options ssss ssssseseiiessseniiresrstirisesrrrrnnrerrrrnnene 6 Verify options installation 0 cccccceeeceeseeeesteeeetneeees 7 3 Getting Started
9. a parameters and then create cinema Size 566 seats Averaging 66 sec Averaging LFE 126 sec gt CREATE CINEMA EXIT INTi AUDIO The cinema parameter overview opens Here you can adjust the pa rameters for the selected cinema To name a new cinema select Name with the rotary wheel and press enter Create cinema sterooj lt yeu 13 38 KA ycinema B81234S6789ABCDEFGH IT KLIMNOPQRSTUYHXYZ abcdefghijkl mnopaqr stuvuxy2 8 amp 0 CANCEL E o ma Define the cinema name using the rotary wheel and the keys as indicated on the screen Press the OK key to confirm the name This brings you back to the cinema parameter overview INTi AUDIO Create cinema sterooj lt uav 13 40 KA Select cinema parameters and then create cinema Hame MyCinema Averaging LFE 126 sec gt CREATE CIHEMA EXIT Create cinema sterooj lt sav 1341 Select size of cinema 36 seats 156 seats S68 seats 1666 seats 1586 seats 2668 seats Create a New Cinema You may specify the number of seats in the cinema by selecting Size The number of seats selected determines which response pattern is used as proposed in the SMPTE ST 202 2010 standard Select the number of seats in the cinema Cinema size of 500 seats applies the standard X curve while other cinema size selections adjust the X curve as described in the table below
10. caling of the graph for best read ability After having completed the views on a selected channel you may do the same with another channel in the same cinema or exit to the Cin ema Meter menu Cinema Meter steroo 4ev 10 13 KA Select a task to start Create new cinema Calibrate cinema Verify cinema Lock into Verify Mode View verification results 6 Exit ear OS Exit Selecting 6 Exit terminates the Cin ema Meter mode and return to nor mal XL2 operation You can restart the Cinema Meter at any later time via the main menu INTi AUDIO 31
11. dded later It is highly recommended to place the microphone on a stand and move a few meters away during the measurement avoid ing reflections from standing too close As the tolerance bands specified by SMPTE ST 202 2010 are very small we strongly recommend the use of a microphone with a class 1 frequency response such as the NTi M2210 measurement microphone Use the pink noise signal generator on your cinema processor or the supplied 20 dBFS pink noise Adjust the outputs of your cinema processor to match the specified reference level for your theater for each channel Start a measurement with the START button PE on the XL2 keyboard The measurement is finished once the set time in bottom right corner of the screen has elapsed The result is the level averaged EQ over the selected time period The bar on top of the graphical spectrum shows either PASSED if all measurement points are within the tolerance limits or the violating measurement points are indicated with a small vertical bar The limit LED button of the XL2 reflects the overall measurement result It lights green if the test passed and red if a tolerance limit violation occurred Assuming the measurement is acceptable we might want to store this for later use or comparison For this we use the Cap ture feature Select the trace control icon S with the rotary wheel and press enter Select Capture EQ and press enter to store this first reading You wi
12. er can review all the measurement data obtained by the service technician to see when and how the behavior of the channel has changed All these steps can be repeated for each channel in every cin ema in any order You may recall previously stored measurement sequences at any later time Both the test configuration and all captured traces are stored You may then continue adding new traces or replace individual traces and store the complete test again In this chapter we create a new cinema An individual folder for each cinema is created on the file system of the XL2 within the folder Cinema Each cinema folder then contains the test templates with toler ance calculation rules depending on the size of the cinema SLE aso isa 4 2dB 1 3 OCT OdBt a 315 0Hz Oscilloscope 1 12 Oct Tol TI PA tk 4k ABR CA set 09 00 39 130 T1685 all Ly 99 96 09 99 00 09 Cinema Meter sterooj lt uav 10 05 KA Select a task to start P ate new cinema Calibrate cinema a Verify cinema Lock into Verify Mode View verification results Exit Start the Cinema Meter by selecting the function Cinema Meter from the main function menu list and pressing to launch it A splash screen is displayed for 3 seconds or until you press Select 1 Create new cinema from the menu and press to start the process Create a New Cinema Create cinema steroo lt yeu 10 13 A Select cinem
13. erance band and possible i violations Also the limit LED shows 60 ai S the overall status of that measure 16 63 aso ik 4k 16k CA MO Ge eisai ment 30 pNGE130T 185 mll cnr ge g9 99 90 00 08 29 INTi AUDIO View verification results You can zoom and scroll the Yscale of the graph for optimiz ing the visibility of details Select gt gt Continue lt lt in the top left corner once you are ready to continue Werify cinema sreras wisn YOU are then asked whether you want to compare the previously se lected measurement result against another capture This can be for example the refer ence curve to see the deviation to Back the original measurement or any other earlier capture for monitoring changes over time Compare current with stored result View verify stero3 q uav 1615 Om g Select a capture from the list Select result to compare ct Capture 2012 08 02 15 50 2012 08 02 16 03 30 STEP 0T 4BU 15 51 gt EQ Mean 1 348 13 OCT Compare B 8dBt a 4 6 00HZ id 63 50 dk k ABCA seT 90 9 3 8 30 PNGE 130 T 16s W View verify steroz q yeu 16 18 View another channel in this cinema Back The screen shows you the differ ences between these two measure ments accross the frequency spec trum as well as the broadband value difference You are again free to adjust the read out frequency field and the V Axis s
14. hown INTi AUDIO Calibrating a channel Once the cinema templates are created using the Create new cinema assistant we are now ready to do the calibration mea surements During this process we will measure and verify the frequency response calibrate the absolute levels according to the SMPTE requirements and conduct a headroom test to verify sufficient dynamic range for every channel Start the calibration process by ex ecuting the 2 Calibrate cinema as sistant in the Cinema Meter mode Cinema Meter 484 43 34 Select a task to start Create new cinema Calibrate cinema Basic verification a View verification results a Exit Cinema Meter i 5 Cinema Meter _steros seu 1400 I i Z Select the cinema The alphabetic list of cinemas represents all cin emas that have been previously cre ated Please select cinemafroom Choose a speaker you intend to cali brate The complete test definition including any previously made mea surements is loaded Cinema Meter sterne lt sau 14 01 Please select channel fRes 3 LFE The test names comprise a test attribute fRes a sequential number and the channel descriptor e g BsL as above Test Attribute Test Description fRes Frequency Response measurements and absolute C weighted level adjustments ex cept for the LFE channel Head room tests This is the level definition for the absolu
15. ing the linear frequency range from 38 Hz up to 832 Hz while the headroom LFE test requires a total of four FFT pages ranging from 10 Hz up to 200 Hz The page key steps sequentially through all these pages To get the full view of the FFT pages you have to align them se quentially The screens have sufficient overlap so that no spectral content is lost The screen channel headroom test appears as follows gt gt Continve lt Mead MEL CEERT gt gt Continue Sver oa lt yeu 14 49 is 94 808 Live 69 dB HR Screen 95 0dBt a 44 789HZ0HR_Screen 95 8dBt a t48 38H2 PASSED PAS a0 a0 7 MLE co AMIGON 4S202H2 416 0612 46 082 MND SET ser MRL TO 2s m Eir og gg oo ANGE S30 TO 2sl MS You may observe that the right most signal bin on the left screen is again visible on the left of the right hand screen The LFE headroom test appears as follows A step oe sau 19 53 EA sterna sav 1453 KARA ster oe sau 1953 KAEA Live 93 1dB z Live 93 148 a Live 3 18 Live 1 348 HR LFE 95 0dBt a 24 958Hz s HR_LFE 95 0dB a 80 012H2 HR LFE 95 0dBf a 112 73Hz s HR LFE 95 0dBf a 191 58Hz PASSED ie PASSED PASSED ia PASSED sver oa wav a4 s4 u s 20 0 u a 0 0 u 0 w w 5 iam aisean Maon iae Asean saaga dosm ciseanz asesi dango Aisea am Matz a goaa Toes Sa eMMMwtese m SeGSMMMEn Ths m i The four pages again overlap sufficiently so that we can monitor if har
16. ired to store The acquired data is not saved to a file and thus all the captures taken after the last Store will be lost You will then be asked whether you want to continue with other chan nel measurements in the same cin ema Yes brings you back to the channel selection while No brings you back to the main menu Calibrate STEP 03 4BU 1432 Calibrate another channel in this cinema Back Select this item to display the mean curve plus deviations of all the previously calculated readings sTero3 lt sav 14 51 KI gt Mean 72 8 dB 13 OCT MiMa 46 8 8 6dBt a 315 0H2 i6 63 50 dk Hk ABR CA SET OO oo 30 RNGE130 T 1 85 all Zy Min Max values are displayed as a grey band and the mean values as a solid white line You may now select he Result Symbols using the rotary wheel and choose any of the cap ured traces to be displayed within he Min max limits This menu entry brings you back to the measurement screen with no changes and allows you to continue your measure ment work in your current setup Calibrating a channel INTi AUDIO 21 INTi AUDIO Headroom Test The headroom test is a specific test designed by Meyer Sound allowing the advanced sound engineer to test the available headroom of the sound system before non linear effects ap pear The headroom test is an adjustment test only and is not avail able in the basic verification mode With the wide band
17. ll be offered 8 possible storage loca tions The default reading names are named after the speaker name with consecutive numbers but you are free to alter them TUTTLE SET OS a RNGE 130 T 1 85 BI Ay gg A stored reading is then indicated by its time stamp You can overwrite the captured reading any time by storing a newer reading in that location Move the analyzer to another measurement position and con duct the next measurement for the same speaker by pressing gt Once the measurement time is elapsed you will see the next measurement result on the screen Capture this as well if desired until you are satisfied with the num ber of measurement locations or until the capture buffer is full INTi AUDIO Calibrating a channel For verification purposes and also for later steps we want now to calculate and display the averaged response curve out of individual readings gt gt Continue lt lt Gd 566_SCRE 8 Select the reading selector with the rotary wheel and press enter Log You see the reading selector menu where you can select any reading from the capture list At the bottom you can also select Mean But this memory is still empty and we have to calculate it first We do this by selecting the calculator item m next to Mean using the rotary wheel and pressing enter 30 2012 08 02 14 05 2012 08 02 14 06 ao 2042 08 02 14 06 2012 08 02 14 09 w 2012 08 02 14 09 2012 08 02 14 10
18. ment Back 26 In the next step you may now com pare the measurement results just acquired with either previous mea surements or the stored reference No skips this step Confirm your selection with enter STEP OT 4BU 15 51 EQ Mean 1 30B 13 OCT Compare B OdBt a 48 66H2 d ea e50 tk k SET Si a ANGE 130 Tiles Mo yg You now see a relative display of your measurement result minus the selected reference capture With no deviations you would see a straight line centered on OdB Using the rotary wheel you may now select the readout frequency field 40 00Hz in this example or the Y Axis where you can zoom and scroll the levels Once you are done with the comparison select gt gt Continue lt lt with the rotary wheel and press enter Verify cinema steros lt uav 1547 Compare current with stored result Back Verify cinema stepon lt uav 15 49 Store Result Back You are asked whether you want to do comparisons against other read ings Do so by selecting Yes or se lect No to continue with the next step in the script Confirm your selection with enter You may store the measurement re sults or discard them In case you se lect Yes then the measured reading is stored in the next free location L1 to L8 If all eight capture memories are occupied then the oldest capture is automatically overwritten Verify a cinema
19. monic or intermodulation frequencies appear anywhere in INTi AUDIO Headroom Test the spectrum due to clipping of the amplifiers The tolerance patterns matches the multi tone signal that must be played through the speaker under test The signals can be found on the Cinema Meter Option CD If you wish to store these files on the MR PRO audio Genera tor for convenient portable playback you may copy the files from the directory Test Signals for MR PRO CINEMA of the enclosed User Manual CD Run the appropriate headroom test signal from the cinema pro cessor library and start the FFT measurement by pressing play Dal ifthe system operates in its linear range then the amount of harmonic and intermodulation distortion remains under the spectral limits To playback and level the signal follow your internal proce dures ster oe uau 15 24 95 2 dB With a signal exceeding the linear range the harmonics will exceed the tolerance limits and the test indi cates Fail 1 In the example the black lines on top of the spectrum display indicate tolerance limit violations throughout the entire spectrum Live HR Screen 95 6dBt a 446 38H2 EIP ee et Lil 356 0042 446 082 452 02 H2 MOO set 30 RNGE 130T8 25 ME cor 23 INTi AUDIO Verify a cinema The cinema verification mode allows a service technician to periodically conduct maintenance measurements within a cin ema following inst
20. multi tone test the screen channels are measured while a dedicat ed low frequency test signal is used for the effects channel LFE The headroom test applies sound pressures of up to 105 dB SPL from multi tone signals Such levels can result in hearing loss and damage your ears if not protected Before performing this test e Be sure others are clear of the area of high SPL e Verify level settings first e Always wear hearing protectors for this test 22 There are two headroom tests one for the screen speakers and a separate one for the LFE channel Start any of these two tests within the 2 Calibrate Cinema and choose Hdrm Screen_FFT_ or Hdrm LFE_FFT_ from your current Cinema directory The test definition automatically activates the FFT function module with pre selected screen views ster oz 480 14 4B 94 8dB The multitone tests expect certain signal components to be present and others must not be higher than e certain levels 75dB in the example 1 to the left 452 02 Hz Live HR Screen 95 6dBt a 789H2 PASSED 36 0042 amp 446 0H2 wan ser an RNGE 130 T 8 25 MI car gg The FFT Analysis has been chosen and setup for its high reso lution within these low frequencies But since the XL2 screen itself only can show 143 FFT lines per page the full display range has to be extended over multiple pages The headroom screen test data is therefore spread over two pages cover
21. on which is then used as the comparable refer ence for all verification measurements Measurement verification is supported by an assisted mode allowing periodic measurement documentation and verifica tion of the response of each channel Tolerance limits indicate to the service technician whether tests have passed or failed enabling him to notify the cinema engineer that the system needs adjusting For simplification the verification mode can be locked so that the XL2 analyzer boots with only that specific measurement task activated The cinema engineer can recall his calibration data at any time and continue executing more detailed measurements for sys tem verification or trouble shooting of each channel A desig nated viewer for verification measurements assists the cinema engineer with comparing the verification data with the refer ence measurements Introduction INTi AUDIO Procedures in this manual require that syn thesized test signals are played back through the B chain of a cinema These signals can be very loud and exceed the normal lev els and can thus cause damage to speak ers and to your ears if used improperly Check the volume control of your amplifier or the level setting of the signal generator before unmuting the signal chain Always wear hearing protection if in doubt INTI Installation AUDIO 2 Installation To operate the Cinema Meter you need the latest XL2 firm ware as well as the Spec
22. r Both the Spectral Lim its Option as well as the Cinema Assis tant must be installed Other options may be installed but are not required to operate the Cinema Meter INTi AUDIO INTi AUDIO Getting Started In order tto understand the fundamental operation of the XL2 the user should be familiar with the XL2 Operating Manual available for download at www nti audio com XL2 The fundamental steps of the Cinema Meter workflow are e Create a cinema Assign name and other related parameters by ex ecuting the assistant Create new cinema This cre ates a series of 8 tests one for each speaker e Calibrate a cinema Tune the frequency response and the absolute levels to match the SMPTE tolerances Measure at different seat ing locations and capture up to eight traces at different measurement positions into the XL2 memory Define the reference curve among your measurements and let the assistant calculate the tolerance patterns for later veri fication measurements e Verify a cinema This assisted mode guides the service technician through the verification measurements to determine whether the channel still performs to the tolerances defined earlier Mea surements are stored for later comparison Lock into verification This mode locks the functionality into the veri fication mode after starting up the device and simplifies the operation for verification users e View verification results The cinema engine
23. r Scroll up and down with the rotary wheel ky to select the Yaxis range Confirm with enter Spectral results in 1 1 1 3 1 6 or 1 12 octave band resolu tion Adjust the resolution at 12 Access and display the physical input range of the Ana lyzer Offers selectable time weighting of 0 1 0 2 0 5 and 1 0 second The run indication shows the measurement status running paused or stopped Various measurement settings are locked during ongoing measurements such as changing the input range or the preset measurement time Shows remaining measurement time in hrs min sec The setting is always set to single measurements Start the measurement by pressing the Dal key Adjustment of measurement time period for single timer setting Userselectable display of broadband results A for A weighted broadband sound pressure level C for C weighted broadband sound pressure level Z for unweighted broadband sound pressure level for no display Screen Overview INTi AUDIO You may select any frequency to read out individual levels The selected frequency is indicated by the cursor arrow Choose between Automatic and Manual settings Set the spectral result display to 1 1 1 3 1 6 or 1 12 octave band resolution Phantom power ASD Indication Actual level result of the indicated frequency band Select the result of interest EQ live or any captured reading The actual level reading at the cursor arrow position is s
24. really pass ing Repeat the measurements if in doubt or press gt gt Continue lt lt to finish the process and continue with another channel INTi AUDIO Calibrating a channel The intention of the verification procedure is to allow a service technician to conduct guided measurements and confirm that the performance of a speaker has not changed Please note that the reference curve used for the verification procedure is the curve that was on the display immediately be fore executing this step In case you want to record a distinct measurement trace at the reference position then you should do this just before you call this menu item Using the last trace on the display as the base for the reference trace has the advantage that the advanced user can 1 Measure the reference curve at the reference position just before the script is executed 2 Choose any of the captured traces for display select best 3 Choose a number of captures to be averaged in MEAN spatial averaging Select then the MEAN for display be fore executing Store amp create verify test You therefore have the choice to either conduct a measure ment at the reference position or load any previously captured reading into the display 20 Select this menu item in case you have no intention to store the measured data This can be the case if you have already stored the data and did some more measurements for investi gation purposes that are not requ
25. ructions displayed on the XL2 screen The intention of these measurements is to find out whether the speaker performance at the reference location is still as originally defined and documented by the cinema engineer who calibrated the cinema The operator sees the measurement results and the pass fail result He can repeat a failed test but he is not able to alter the tolerance limits In case of continuous fails of certain tests the service techni cian can then notify the cinema engineer who has access to the measurement history of that speaker The service technician is not necessarily a measurement ex pert as he has only to follow the clear instructions given on the screen 24 Cinema Meter steroo yeu 15 37 KT Select a task to start 1 Create new cinema 2 te cinema no a erify Mode 5 View verification results 6 Exit Cinema Meter steroi lt ev 1400 Please select cinema room Start the verification assistant by se lecting 3 Verify cinema Select the cinema The available cinemas have been previously created by the cinema engineer and are presented in alpha betic order Confirm your selection with enter Verify cinema steroe lt uav 15 33 Place microphone at reference position Back Verify cinema stero3 lt yau 1543 Please select channel fes 2 C fRes 3 R fRes Ls fRes 5 Rs ffes 6 BsL fRes 7 BsR fRes 8 LFE
26. s following the SMPTE ST 202 2010 standard and the SMPTE RP 200 2012 recommended practice The Cinema Meter Package includes e Spectral Limits Option e Cinema Assistant Option e Audio CD with Cinema Meter test signals e Data CD with PDF user manual and test signals for the MR PRO audio generator Cinema Meter Package has been developed in co operation with Meyer Sound and provides support for calibration accord ing to the SMPTE ST 202 2010 standard as well as the SMPTE RP 200 2012 recommended practice It provides an efficient workflow for setting up all screen channels the surround chan nels as well as the LFE channel Each measurement project is designated to a cinema and each cinema is separated in its own directory on the SD card of the XL2 for clearer organization of the resulting measure ment data Assisted tasks select the target frequency response depend ing on the cinema size and pre define test patterns for every individual cinema The cinema engineer then tunes the frequency response for each channel and adjusts the absolute levels according to the pre defined tolerance patterns Single measurements at a Golden Seat as well as measurements averaged over vari ous seat positions are supported Specific headroom tests for all channels ensure that maximum dynamic range is provided without clipping the live audio mate rial For each channel a response reading can be recorded at the reference positi
27. s are explained here Select this entry to store all test definitions and the captured data of a test including the last reading on the display Cinema Meter ster oa Store Results 4BU 13 58 This saves the test under the speak er channel number that you are working with and asks you whether you want to continue with another channel Please note that previously stored results are automatically overwritten Should you wish to keep older measurements then we advise you first to create a new cinema with a different name Stores the entire test as described before then creates the test template for the verification mode and displays it for visual veri fication Calibrating a channel Calibrate STEP O3 4BU 14 25 Store results Done Calibrate STEP 04 48u 1437 Press ok to view the created verify test Then press run and check if it passes MEA stero yeu i441 KI 72 3 dB 1 3 OCT B OdBt a 486 6H2 PASSED _ an d e3 50 ik k 16kCA MO DUD 30 RHGE 130 T1 Os Mo yg 4 INTi AUDIO The assistant copies all the neces sary settings from this test ap plies the appropriate tolerances and stores the last displayed reading as the reference curve for the verifica tion tests Once the test is created you can view the created Verify test Press OK to view the created test Activate the test signal once more and verify that the test is
28. s point you may use the rotary wheel to select either the readout frequency field 400Hz in the above example or the Y Axis where you can zoom and scroll the levels Please note that these viewing scroll actions do not influence the measurement result at all they are just altering the scal ing Once you are done with the adjustments select gt gt Contin ue lt lt with the rotary wheel and press enter 25 INTi AUDIO Cinema Meter steros sev 1446 Result Failed Repeat measurement Verify a cinema In case the measurement did not pass the stored tolerance limits you will be notified with the limit LED lighting up red and with a Failed message You can now select whether you want to repeat that measurement Cinema Meter stero sav 14 09 Select result to compare 2012 03 01 03 46 2012 05 07 05 22 2012 05 42 11 56 In case you choose Yes you can now select the capture you want to compare your last measurement against The selection can be any earlier stored capture L1 to L8 or the reference trace Note that the reference trace cannot be altered in the verification mode Choosing Yes discards the current measurement and allows you to repeat this measurement step A No selection brings this failed test forward Confirm your selection with enter Confirm your selection with enter Cinema Meter _steros lt sav 19 09 Compare result with stored measure
29. te levels defined in the templates according to SMPTE ST 202 2010 and SMPTE RP 200 2012 Calibrating a channel JINTi AUDIO x svn wnang Ne Minimum and maximum toler EQ dB 1 3 OCT imi EO cence g n SI ance limits for the selected speaker an _10 DATA_T0 COMPARE are represented by the displayed Left screen channel grey bar Additionally the ideal curve is plotted as a white line Center screen channel a The absolute levels of the toler RET AGE ance limits are set according to the P a RNGE 130 T 1 65 al y Right screen channel SMPTE Left surround channel Right surround channel za Back surround Left channel Back surround Right channel E Low Frequency Effects channel Start with a frequency response test Select the speaker you want to test and press File name Level Channel Description C WTD 82 dB 2 dB Bo INTi AUDIO Calibrating a channel This pre defined configuration cannot be altered by measuring additional curves This means you may later delete all captured traces and the arrangement remains still as pictured Place the instrument and the measurement microphone at the first measurement position This will most probably be the ref erence position or ideal seating position According to SMPTE ST 202 2010 and SMPTE RP 200 2012 the reference position is in the middle between L and R and 2 3 back in the room Other seat positions for spatial averaging may be a
30. tral Limits and the Cinema Assistant Options installed Update the firmware Cinema Meter is supported by the XL2 firmware V2 40 and higher For the firmware update register your analyzer at http my nti audio com and proceed as instructed on the XL2 sup port page Install the options Please use the license numbers printed on the license card inside your purchased Cinema Meter Option The license num bers are valid for activating the options on a single XL2 Follow the installation procedure described on the license card inside the Cinema Meter Option XL2 Spectral Limits XLZ Cinema Assistant License Number License Nusber 9999 9999 9999 9999 9999 9999 9999 9999 Example of a license card with sample numbers only After instal can visually verify the Installation ing the new firmware releases and the options you installation Oscilloscope 1 12 Oct Tol Calibrate Profile 30 RNGE 130 LOW S Cinema Meter iLE yeu 1044 dB dB 36 2dB SET E cg Select System Settings from the main menu and press Firmware Serial number Options STI PA HA Tt ev n v2 40 A2A 62666 D1 Extend Acoustic Installed Installed Remote Measurmnt Installed Spectral Limits Installed Cinema Assistant Installed Use the page key to bring the in formation screen into view The firmware version is displayed at the top The version must be 2 40 or highe
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