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1. Live 95 2 dE HR S creen 95 0dEt a 446 360Hz Pl ri riuid I Lt 36 00 H2 2 416 0H2 452 02 H2 LEULUI SET 30 RHGE 13 n T zs W a a ai a e With a signal exceeding the linear range the harmonics will exceed the tolerance limits and the test indicates Fail e In the example the black lines on top of the spectrum display indicate tolerance limit violations throughout the entire spectrum The cinema verification mode allows a service technician to periodically conduct maintenance measurements within a cin ema following instructions 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 Verity a cinema Cinema Meter ster oo yay 15 37 Select a task to start Create new cinema a Calibrate cinema a Verity cinema Lock into verify Mode a View verification results
2. Exit Cinema Meter stepos 4ev 1400 Please select cinema room INTi AUDIO e Start the verification assistant by selecting 3 Verify cinema e Select the cinema e The available cinemas have been previously created by the cinema engineer and are presented in al phabetic order Confirm your se lection with enter 25 INTi AUDIO Merify cinema steroz 4au 45 33 Flace microphone at reference position Back Merify cinema steroa lt 4au i543 Please select channel thes LFE Verify a cinema You are now requested to place the measurement microphone at the reference position The microphone position remains un changed for all the channels veri fied in this process Adjust the height of the micro phone according to the specifica tion of the cinema engineer Continue with enter Select the channel you want to verify Please note that the only channels available for the verifi cation are those that have been previously commissioned by the cinema engineer Confirm with enter Merify cinema steros lt 4au 15 45 Fress OK to start measurement Bock e STEFOS 4BU 15 46 E T2 1dB 1 3 OCT 1 L Tol B AdEt h 4HBLBH2 sss SES SS iE 63 250 dk Hk ARCA THIAUUIUAAUTI SET GOO to 30 AHGE 130 T LAs E ee goa a Es Make sure that you have no in terfering noises present in the theatre no t
3. 27 INTi AUDIO Merify cinema ster og lt 48u 1547 Compare current with Stored result Back Merify cinema stTeroa lt 40u 15 49 Store Result Back e This mechanism ensures that you and the cinema engineer always have access to the history of the last eight measure Lock into Verify Mode e You are asked whether you want to do comparisons against other readings Do so by selecting Yes or select No to continue with the next step in the script Confirm your selection with enter You may store the measurement results or discard them In case you select Yes then the measured reading is stored in the next free location L1 to L8 If all eight cap ture memories are occupied then the oldest capture is automatically overwritten ments They are all complete with date and time stamps e Confirm your selection with enter e This step completes the measurements for a specific chan nel In the next screen you will be asked if you want to con tinue doing measurements in the same cinema but with an other channel 28 Merify cinema steroa lt sau 15 50 Verity another channel in this cinema Bock 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 If you select this menu item you are configuring the XL2 to always boot up in the verificatio
4. CINEMA METER HANDHELD AUDIO AND ACOUSTIC ANALYZER AL Headquarter 423 239 6060 info nti audio com Americas 1 503 684 7050 americas nti audio com China 86 512 6802 0075 china nti audio com Czech 420 2209 99992 czech nti audio com Japan 81 3 3634 6110 japan nti audio com South Korea 82 2 6404 4978 korea nti audio com United Kingdom 44 1438 870632 uk nti audio com www nti audio com NTi Audio is an ISO 9001 2008 certified company Firmware V2 40 Version 2 40 02 May 2015 All information subject to change without notice All rights reserved Minirator is a registered trademark of NTi Audio TM XL2 EXEL M4260 M2211 M2215 M2230 MA220 MR PRO MR2 and TalkBox are trademarks of NTi Audio Made in Switzerland Table of Contents INTi Table of Contents 1 IMtrOCUCTION 2 ccccsccccesseeeessseecesseeeesseeeessseeesssneesssseeeess 4 MANON ACTON NEST ieee 22 Preparing the headroom stimulus signals 23 2 Installation sis nacesnasesnceysssnssantaiencnsawcancduepotnineceaaienianueavcnninsns 6 l Loading a Neadroom TES Us sanscaswessendosadvossncossacduancaniess 23 Update the firmware E E wade secu tsiet ede 6 Conducte Heacioond e660 24 Install the CO NOMS sivesin scare sass tates aaron anaapa EER 6 Verify options 1S allatiOU tkcrwseceactvencereash are a anaa 7 7 Verify a Cinema cccccccsccecsseeeceeeeeseeesseeesseaeessaeessaees 25 3 Getting Started cccc
5. Cinema Each cinema folder then contains the test templates with toler ance calculation rules depending on the size of the cinema asd 14 53 4 2 dB 173 OCT HdBt a 315 0Hz2 Oscilloscope 1 12 Oct Tol STI PA Cinema Meter Calibrate a Profile System Settings ae i6 63 250 tk 4k 46kCA seT 09 00 38 mi 30 ANGE 130 T 1 85 all L 59 56 09 Cinema Heter steroo lt sau 10 05 Select a task to start a Create new cinema Calibrate cinema Verity cinema Lock into Verify Mode a View verification results Exit e Start the Cinema Meter by select ing the function Cinema Meter from the main function menu list and pressing to launch it e A splash screen is displayed for 3 seconds or until you press e Select 1 Create new cinema from the menu and press to start the process Create a New Cinema Create cinema steroo lt 4au 40 13 Select cinema parameters ond then create cinema SHA seats BA Sec Averaging LFE 124 sec gt CREATE CIHEMA IT INTi AUDIO e 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 steroo lt 48u 43 38 fy Cinema HiZ34SersS9ABCOEFGH LIT KLIWOPGRSTUYHHRYZ gbcdefghijkl mnopge stuvuxvz2 4 4 C3 f fe CANCEL E gy ok TEN
6. e 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 ster oo 4au 13 40 Select cinema parameters ond then create cinema Home MevCinend SHA segts Averaging Averaging LFE 124 sec gt CREATE CIHEMA PEXIT Create cinema steroo lt 40u ia 44 Select size of cinema 3A seats 154 seats CHA seats lpp seats 1560 segts ZARA segts Create a New Cinema e You may specify the number of seats in the cinema by selecting Size The number of seats selected determines which response pat tern 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 ta ble below Create cinema ster oo lt 4au 13 42 Select cinema parameters and then create cinema Home MeCinend Size Avera weroging Averaging LFE gt CREATE CIHEMA PEXIT Create cinema steroo e 4au 13 43 Select cinema parameters ond then create cinema Home MeCinend SHA seats gt CREATE CIHEMA PEXIT Number of seats Freq Hz 30 150 S00 10COy 1500 2000 Create cinema steroo 48u i347 Select cinema parameters ond then c
7. 16 03 PASSED 2012 08 02 16 04 2012 08 02 16 07 2012 08 02 14 27 want to compare the previously selected measurement result against another capture This can be for example the ref erence curve to see the deviation to the original measurement or any other earlier capture for moni toring changes over time e Select a capture from the list Eee STEFOT 4BU 45 54 EQ Mean 1 3d 1r3 OCT Compare H HdEt 4E BRH2 iE 63 250 dk Hk sR CA SET 00 0 Oi a e view verif sTeroz s 48u 46 18 View another channel in this cinema Back e The screen shows you the differ ences between these two mea surements across the frequency spectrum as well as the broad band value difference e You are again free to adjust the readout frequency field and the Y Axis scaling of the graph for best readability 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 Cinema Meter menu Exit Cinema Meter ster oo yay 10 13 Select a task to start Create new cinema a Calibrate cinema a Verify cinema Lock into verify Mode a View verification results INTi AUDIO e Selecting 6 Exit terminates the Cinema Meter mode and return to normal XL2 operation e You can restart the Cinema Me ter at any later time via the main menu 31
8. cinema 29 INT View verification results AUDIO view verif sTeroi 48u 46 o0 The list represents all channels containing verification results e Select a channel You can zoom and scroll the Y scale 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 Please select channel verify cinema sterog lt yav 1547 A You are then asked whether you thes amp LFE view verif sTeroi 9 48u 16 07 Select result to view 2012 08 02 15 50 2012 08 02 16 03 2012 08 02 16 04 2012 08 02 16 07 2012 08 02 14 27 PSs STE OS GED 15 18 ao 1 BO 50 s z 7 s z 16 Ba 250 ik 4k 1bk CA THIAUUIANUII SFT cianie an RHGE 130 T 1 85 all cnt Pai a a a a A a n La 30 Select a first measurement result you want to visualize The pre sented captures show the history of verifications of that channel Each capture is marked with a time stamp The last capture in the list is the reference trace visualized together with the ap plicable tolerance band and pos sible violations Also the limit LED shows the overall status of that measurement Compare current with stored result Bock View verif sTeroa 1 48u 4615 Select result to compare L1 T7 1dB 1r3 OCT e he measurement result is then eni2 D8 02 15 50 L 30 42 0 EL BdEt 1 BS BRHz 2012 08 02
9. intended for Meyer Sound Cinemas only and shall only be conducted after a suc cessful level and frequency response calibra tion Please be aware that this test may destroy equipment if the tested components of your B chain cannot handle the power 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 Verity level settings first e Always wear hearing protectors for this test Use the headroom test files from the Meyer Sound D Cinema Package or their Blue Ray disk Copy them to the Digital cin ema processor DCP by following the standard procedure Contact Meyer Sound in case you need support in this matter 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 eee STEFO2 4B 14 48 34 8 JE The multi tone tests expect certain signal components to be present and others must not be higher than f certain levels 75dB in the example u to the left EO 36 00 H2 416 0 H2 Live HA_Screen 95 0dEt a YH 7S9H2 PASSED l
10. the Cinema Meter mode Cinema Meter yeu 23 34 Select a task to stort Create new cinema 2 Calibrate cinema a Basic verification a View verification results a Exit Cinema Meter Cinema Meter stepos eu 1400 Ce e Select the cinema The alphabetic list of cinemas represents all cin emas that have been previously created Please select cinema room e Choose a speaker you intend to calibrate The complete test defi nition including any previously made measurements is loaded Cinema Meter steroz sau s404 Please select channel 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 absolute levels defined in the templates according to SMPTE ST 202 2010 and SMPTE RP 200 2012 Calibrating a Channel INT AUDIO m eaa e Minimum and maximum toler File name Level Channel Description EQ dB 1 3 OCT Taa C WTD EO ea aa aa EAT ance limits for the selected speaker an ODATA TO cONpARE are represented by the displayed E oan k is plotted as a white line The abso Er lute levels of the tolerance limits are iE 63 250 dk Hk Ss ARCA argase Set according to the SMPTE a R
11. 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 into its own directory on the SD card of the XL2 Assisted tasks select the target frequency response depending on the cinema size and pre detine 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 Meyer Sound headroom tests for all channels ensure that maximum dynamic range is provided without clipping the live audio material These headroom tests are designed to be executed on Meyer Sound cinemas only For each channel a response reading can be recorded at the reference position 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 activate
12. 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 4BU 14 54 i2 Oct KABA v3 oct Code Sere See ee SET were oe a RYGE A Tiles MO Ly seesesan Result Symbols Capture Select this to capture measured traces manipulate them and handle tolerance files Tolerance file name Shift level 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 Y Scale setting Select the YAxis with the rotary wheel 3 and confirm with enter Select the zoom factor between 2 5 and 20 and confirm with enter Scroll up and down with the rotary wheel 3 to select the Y axis range Confirm with enter 4 Spectral Measurement Result Spectral results in 1 1 1 3 1 6 or 1 12 octave band resolu tion Adjust the resolution at 2 Input Range 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 c
13. 452 02 H2 TINNITANNANINUUI SET 30 RHGE 130 T 25 E fats ttatatiats cnt A a n n a INTi AUDIO Headroom Test 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 covering 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 sequentially The screens have sufficient over lap so that no spectral content Is lost The screen channel headroom test appears as follows OEA steroaj yeu 14 45 KJ gt Continue lt lt gt gt Cont Live 94 6dB Live 93 9dB HR_Screen 95 0dBt a 44 789HZ HR_Screen 95 6dBT a 446 36H2 PASSED Oh l 100 100 WL E BO 36 00H2 amp 416 0H2 452 02H2 416 86 H2 A 416 0H2 832 886 H2 MAMII SET a RNGE 130 T 8 25 Wo cn MINNI EEan 190 00 0030 RNGE130T 25 MO carog g9 99 You may observe that the right most signal bin on the left screen is again visible on the left of the right hand screen 23 INTi AUDIO Headroom lest The LFE headroom test appears as follows 2 gt Contin
14. AGE a0 Tiesai y 8 80 28 85 dB Right screen channel Start with a frequency response test Select the speaker you want to test and press INTi AUDIO Calibrating a Channel This pre detined 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 added 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 Audio M2211 or M2230 measurement microphone Use the 20 dBFS pink noise signal generator of your digital cinema processor DCP Adjust the outputs of your cinema processor to match the specified reference level for your the ater for each channel Start a measurement with the START button Db on the XL2 keyboard The measurement is finished once the set time in bottom right corner of th
15. 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 e Measure the reference curve at the reference position just before the script is executed e Choose any of the captured traces for display select best e Choose a number of captures to be averaged in MEAN spa tial averaging Select then the MEAN for display before ex ecuting 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 required to store The acquired data is not saved to a file and thus all the captures taken after the last Store will be lost e You will then be asked whether you want to continue with other channel measurements in the same cinema e Yes brings you back to the chan nel selection while No brings you back to the main menu Colibrate STEF 03 48u 14 a2 Calibrate another channel in this cinema Bock Select t
16. alking and keep the doors shut Start the measurement by press ing enter The measurement starts imme diately and you see the total time as well as the remaining measure ment time in the bottom right cor ner The measurement result is dis played after the measurement pe riod has elapsed At this 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 of your cinema processor DCP note that these viewing scroll actions do not influence the on the channel you have selected measurement result at all they are just altering the scaling to verify e Once you are done with the adjustments select gt gt Contin e Press enter to confirm once ue lt lt with the rotary wheel and press enter the noise signal is playing verify cinema ster oy 4au i544 e Use the 20dBFS pink noise signal Enable pink noise through selected channel Bock 26 Cinema Meter sreros uev 14 16 Result Failed Repeat measurement e Choosing Yes discards the current measurement and allows you to repeat this measurement step A No selection brings e n 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 e You can now select whether you want to repeat that measure ment this failed test fo
17. ccccceessssssessssceeesessseessesseneeeessenes 8 AINE STEN Neha aitee gee eames a i 8 View verification reSUIts cccccccceseeeseeeeseeseeeeeeeneees 29 4 Create a New CInema ccccccceeeccseeeeeeeaeeseeeeeeesenenaees 9 S EAEE orar AEA E 31 5 Screen OVErVICW ccceccceeeeceseeceeeeeeeeeseeeseeeeseeeeseeneees 12 6 Calibrating a Cinema Channel ccccsecceeeeeeeeeees 14 Capturing a MeasSureMent s ssiiesineerireriirerirerrreeren 17 Calculating Average of captured traces ccee 17 Storing a completed channel test 18 SEL EEA E E PEE A EEE E E 18 FS OVET Wil E einai a aidaa 19 Store and create verify teSt ce ceccceeeeeeeseeeees 19 Discard chang S enrere ona i 20 Show mean deviation ccccceccceeeceeeeceeeeeeae setae eeeaes 20 INT Introduction AUDIO 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 cinemas 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 Cinema Meter Package 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
18. d 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 INT AUDIO e 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 levels and can thus cause damage to speakers and to your ears if used improperly e Check the volume control of your amplifier or the level setting of the signal generator be fore unmuting the signal chain e Always wear hearing protection If in doubt INT Installation AUDIO 2 Installation To operate the Cinema Meter you need the latest XL2 firm ware as well as the Spectral 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 ins
19. desired until you are satisfied with the number 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 reContinuecs i patentine e Select the reading selector with DERE E the rotary wheel and press enter collies Memini oct 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 m next to Mean using the rotary wheel and press ing enter 30 2012 08 02 14 05 2012 08 02 14 06 an 2012 08 02 14 06 2012 08 02 14 09 aT 2012 08 02 14 09 2012 08 02 14 10 Bo p 2012 08 02 14 10 TOGGLE INFO gP KEY MN a a ANGE 130 TOS ME yi 5g 06 50 INTi Calibrating a Channel AUDIO gt j1 3 OCT 2012 08 02 14 0588 Hz i ani2 ne o2 14 06 4 r 2012 08 02 14 06 du a042 08 02 14 09 2042 08 02 14 09 e This opens the calculation selector menu offering all captures for the averaging process Select those 0 enig UB t 140 you want to consider for the cal m ae culation by selecting the capture kca with the rotary wheel and press m RHGE a T Les Woy B05 ing enter A considered capture is indicat
20. e 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 lo e Select the trace control icon with the rotary wheel and press enter 22Continue lt steroa o yau 14 04 LEk CA Pa a i a a A E n n THILAUIIANUII SET an RAGE 130 T 1 85 all mu cr 00 00 50 e 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 e Move the analyzer to another measurement position and conduct the next measurement for the same speaker by pressing Dm Once the measurement time is elapsed you will e Select Capture EQ and press en ter to store this first reading You will be offered 8 possible stor age locations The default read ing names are named after the speaker name with consecutive numbers but you are free to alter them see the next measurement result on the screen e Capture this as well if
21. ed by a black dot 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 cal culation process can be repeated at any time later Leave the menu by pressing ESC eee STEFOZ 7 L2 72 506 ne A 4BU 14 24 13 OCT GAB_SCRE 5 0dEt a 1 600kHz 16 Ba 250 ik 4k LEk CA Po a a a SET pen e E e a a0 phagein Ties Wo Ly anann Calibrate STEP D3 How do wou want to continue with Res 1 L 1200 T_ Store Store amp create verify test Discord changes Show mean deviation Back 4BU 14 45 e To continue the procedure once you have completed the adjust ments and measurements on that specific channel select gt gt Contin ue lt lt on the top left corner of the measurement screen You may also reach this by pressing ESC This opens a menu allowing you to define the further use of your acquired data Select this entry to store all test definitions and the captured data of a test including the last reading on the display Cinema Meter sterog 4a 13 58 Store Results e This saves the test under the speaker 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 the
22. hanging the Input range or the preset measurement time Shows remaining measurement time in hr 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 e A for A weighted broadband sound pressure level e C for C weighted broadband sound pressure level e Z for unweighted broadband sound pressure level e 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 shown 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 e Start the calibration process by executing the 2 Calibrate cine ma assistant in
23. his item to display the mean curve plus deviations of all the previously calculated readings Calibrating a Channel INT AUDIO eee STEFO3 lt 4BU 14 51 EA Min Max values are displayed as a ean T2 cdB 7 173 OCT MiMa 6 8 B det 31z8Hz grey band and the mean values as a solid white line You may now select 1 the Result Symbols using the rotary an wheel and choose any of the cap sa 0 tk e ca tured traces to be displayed within SET 00 00 30 ao RAGE sao Ties MI Sy oscs cs the 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 21 INTi Headroom Test AUDIO The headroom test allows the advanced sound engineer to test the available headroom of the sound system before non linear effects appear The headroom test is an adjustment test only and is not avail able in the basic verification mode With the wide band 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 is a very stressful test that drives the sys tem right to its limits This test is intended for Meyer Sound Cinemas only and shall only be conducted after a successful level and frequency response calibration 22 The headroom test excites the audio system right to its limits beyond the standard levels This test is
24. ide the Cinema Meter Option XL2 Spectral Limits XLZ Cinesa Assistant License Number License Nusber 9999 9999 9999 9999 9999 9999 9999 9999 Example of a license card with sample numbers only Installation After installing the new firmware releases and the options you can visually verify the installation SLMeter RTA 4Bu 40 44 FF Cinema Meter pau ate io aoe dB 26 27 dB we te sstsctre 30 RHGE 130 LOW cnt OOOO IHF MB Firmware papa ds Serial number AZA BZE6B 01 Options Extend Acoustic Installed STI FA Installed Remote Measurmnt Installed Spectral Limits Installed Cinema Assistant Installed Select System Settings from the main menu and press 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 higher Both the Spectral Limits 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 to 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 te
25. n mode This has the strong advantage that the occasional user can easily get to the verifi cation mode Cinema Heter sterool o sau 15 52 Select a task to start Create new cinema Calibrate cinema a Verity cinema Lock into Verify Mode a View verification results Exit e Select 4 Lock into verify mode Cinema Meter steroo lt 4au 45 53 Lock sL into Verify Mode Select UNLOCK after Power Up to return to the Cinema Meter menu Tm Cancel Merify cinema steroo lt 4au 15 54 Helcome to CIHEHA HETER Verify Mode WHLOCK e A confirmation screen appears Select OK to activate this locked mode or Cancel to return to the Cinema Meter menu e n this mode the XL2 analyzer al ways boots up in the locked verifi cation mode e Exit the locked mode at any time by selecting Unlock in the bottom left corner View verification results INTi AUDIO 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 Cinema Meter Je yeu 43 34 Select a task to start Create new cinema Calibrate cinema a Verify cinema Lock into verify mode oo View verification results view verif stepon lt 4au 45 59 Please select cinemarroom HyCinema e Select 5 View verification re sults to enter the viewer mode e Select the
26. n 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 Colibrate STEFOS 4BU 44 25 Store rezultas Done Colibrate STEFO4 4B 4447 Press ok to view the created verify test Then press run ond check if it posses STEFO4 4BU i4 4i E T2 dE 1 3 OCT 1 L Tol B AdEt a 40 0HZ sss SSE SSS eee iE 63 250 dik Hk dEkC IUNAINNTAUTI SET OO 1 00 foreel a RAGE 10 Ties EO y gpg INTi AUDIO e The assistant copies all the nec essary settings from this test ap plies the appropriate tolerances and stores the last displayed read ing as the reference curve for the verification tests e Once the test is created you can view the created Verify test Press OK to view the created test e Activate the test signal once more and verify that the test is really passing e 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
27. reate cinema Home MeCinend SHA seats BA Sec Averaging LFE 124 sec CREATE CIHEMA 2000 OdB OdB OdB OdB OdB OdB 4000 1 0dB 0 5dB OdB 0 5dB 1 0dB 1 5dB 8000 2 0dB 1 0qdB OdB 1 0dB 2 0dB 3 0dB e Select the averaging time for the frequency response measure ments Default is 60 seconds giv ing a level accuracy of 0 5dB at the lowest frequency With 30 sec onds the lowest frequencies will have an uncertainty of 10B Select the averaging time for the LFE channel As the LFE handles only low frequencies the default Is set to 120 seconds e You may now create the template for that cinema by selecting gt CREATE CINEMA and pressing e The assistant then creates the folder with the cinema name and generates the appropriate tests In that directory Please note that all the cinemas are created in the root direc tory Cinema 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 5 Screen Overview All the frequency response measurements are based on the 1
28. rward e Confirm your selection with enter Cinema Meter stepos lt yau 14 04 Compare result with stored measurement Bock e n the next step you may now compare the measurement re sults just acquired with either pre vious measurements or the stored reference No skips this step e Confirm your selection with enter Verify a cinema Cinema Meter stero 4au 14 04 Select result to compare 2012 03 01 09 46 2012 05 01 05 22 2012 06 13 18 40 2012 06 13 19 13 2012 06 28 16 03 2012 06 12 11 56 INTi AUDIO e In case you choose Yes you can now select the capture you want to compare your last measure ment 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 e Confirm your selection with enter eContinued lt 4B 45 54 E Mean 1 3dB 173 OCT Compare H AdEt h 4E AAH2 iE 63 250 ik Hk ARCA SETOM 08 a e 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 OB e 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 e Once you are done with the comparison select gt gt Contin ue lt lt with the rotary wheel and press enter
29. sts 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 e 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 engineer 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
30. ue lt lt gt gt Continue lt lt DEEA steroa Yeu 1453 Peete sTePoa o yav 1454 7 Live 93 1dB Live 93 1dB Live 3 1dB Live 1 3dB HR_LFE SS 6dBt a 24 958H2 HR_LFE ee BdBt a 80 012 Hai HR LFE 95 0dBt a 112 73H2 HR LFE 95 0dBt a 191 58H2 a a PASSED PANSSED PASSED 100 100 100 100 s0 s0 s0 s0 80 ao 80 Bo Ww 10 10 Ww 60 60 60 60 18 00H2 A S52 0H2 10 002 61 33H2 A 52 0H2 113 34H2 104 6 1H2 A 52 0H2 156 67H2 148 00 H2 A 52 0H2 200 01 H2 erae a T 2s m arom os 50 0 Stormy a T 2s m ape Ba Pa e EE n T 2s m aroni oo 50 0 Ola ee 18 25 m Ek os ip pa The four pages again overlap sufficiently so that we can monitor if harmonic or intermodulation frequencies appear anywhere in 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 test sig nals are available for download at the NTi Audio user website http my nti audio com You may store these files on the MR PRO Signal Generator for convenient and portable playback Run the appropriate headroom test signal from the cinema pro cessor library and start the FFT measurement by pressing play bal 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 24 Eee STEFO2 YBN 15 24

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