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NX242 Digital TDcontroller

1. M LO REMOTE SENSE LINES E EAR EE EE 18 NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 nn 24 TD CONTROLLER INSTRUCTIONS DE SECURITE IMPORTANTES MUTE SOLO BUTTONS vis i cette eee te eege See EU Ee etuer vei v E e EUER Ve e EET esee wv 18 DISPLAY amp INDICATORS T E 18 CONTRAST ADJUSTMENT EEEE 18 SERIAL LINK DOWNLOAIDER en en nete dasi sisse sei ta sess desees seta asa si sees este gases esses tate aa dass s esee ta asas esset seta ana nnn 18 MENU DESCRIPTION E 19 MAIN FAMILY SELECTION cwis sscsseciecssnsssacecssssessecesabesssecceosnvovsaacevsssesoui esis ssuuddsssoeesessecbessocdsussonscsisvensseuesdbssosuscessdnsvacesiusiesauetes LB gg Le 19 LG o Ceo CUN LATE OI DRE ses 23 CURRENT RATING S Ges S SS s e AMPLIFIER GAINS EE HOW TO SET CORRECT GAIN AND POWER INFORMATION IN THENX242 ins 25 BER E KU ADVANCED PROTECTIONS ee eese ee eee nose enne Seen m ey AMPLIFIER LATENCY EFFECTS ON PROTECTION sccsssssscssssccsssscccssssccccssccccesssccscesssccsensccccscnacccessnacccesscaccessacssesssecescsssecseses 28 INSTALLATION RECOMMENDATIONS sseseseserererererererererererererererererererererererererererererererererererererererererererererererererererereree 29 AUDIO CHAIN RECOMMENDATIONS TL 29 ABOUT LOUDSPEAKER MANAGEMENT DEVICES
2. 2va M anw INVHOVIG 42018 Jejoguooq L E1610 ZYZXN ANHE JE Suonoojoud 9 ones e 61q oipny UDO uyed enBojeuy TM TAMIL NOLLVINWIS HV3d kenne SUNLWHSdWAL 3H care ENEE dueysisseyo Aust 109 8910A So pueunuoo queweoedsip puewwog LINAN3OVTIdSIQ INIVO dAVAOYLIOA div HAMOd diy eu amp is HOVETIVA ke MALIN ANANI ONIA13HS 03 M aw BEIENEE gu ONIA13H 03 ai av le Lasnas av H TLAdNI WOOSNQV3H 1 Y INANI NX242 USER MANUAL LOAD2_22 DATE 12 3 2004 NX24 PAGE 15 TD CONTROLLER BLOCK DIAGRAM DESCRIPTION ENGLISH Protection VCAs 6 and VCEQs 7 Each channel has its own simulation and protection process Each audio channel contains a combination of controlled gain stages let s call them VCA s as in our analogue circuitry These VCA s are embedded into complex composite structures in order to change their basic operation into frequency selective attenuation This operation is similar to that of a voltage controlled dynamic equaliser VCEQ Each VCEQ and VCA is controlled by the synthesis of several signals issued from the v
3. On the magnitude graph display the difference between the well aligned system and the one with the CD12 2ms delayed The difference is 2dB at 100Hz This example is displaying the consequences of a slightly incorrect alignment If we add to this the delay introduced by a slightly different electric path plus the small delay introduced by some processing plus a EQ filter done by the user near the cut off frequency The graph above could shows differences in excess of 6dB Up to the point where the system might work better if you reverse the polarity of the sub Precautions amp check Before using the AUX send of your desk ensure that the output are in phase you can feed a 100Hz signal at the input and monitor the MAIN and AUX on a dual trace scope Always apply EQ or processing to both signals feeding the NX242 So the phase relation is not affected Never add additional low pass filtering on the SUB or high pass to the main system Inverting polarity on one channel should always result in a massive difference near the crossover point If the sound is more or less the same the system is no longer aligned NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 TNX TD CONTROLLER PAGE 37 APPENDIX A LIST OF SUPPORTED PRESETS LOAD2 22 ENGLISH Appendix A List of Supported presets LOAD2 22 At the time of printing the following factory presets are supported by LOAD 2 22 Please refer to the release notes if the sof
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5. NX242 Digital TDcontroller PAGE 2 EXE N42 TD CONTROLLER IMPORTANT SAFETY INSTRUCTIONS ENGLISH Declaration of conformity This equipment has been tested and found to comply with the safety objectives and essential requirements of European 73 23 EEC and 89 336 EEC directives and international Standards by fulfilling the requirements of the following harmonized standards Electrical Safety EU IEC 60065 12 2001 Audio video and similar electronic apparatus Electrical Safety US UL60065 Seventh Edition dated June 30 2003 category AZSQ E241312 Electrical Safety CAN CSA C22 2 N 60065 03 Edition dated April 2003 category AZSQ7 E241312 Electrical Safety Rest of the World CB test certificate DK 8371 based on IEC60065 2001 7nd ed with all national deviations Radiated Emission EU Radiated Emission US FFC part15 class B Radiated Emission CAN This Class B digital apparatus complies with Canadian ICES 003 RF Immunity EU EN55103 2 1996 Electromagnetic compatibility Product family standard for audio video audio visual and entertainment lighting control apparatus for professional use EN55103 1 1996 Electromagnetic compatibility Product family standard for audio video audio visual and entertainment lighting control apparatus for professional use C Ou LISTED Audio emen Fe Note EMC conformance testing is based on the use of recommended cable types The use of other cabl
6. Choose serial port connected to Nx i COM1 x Serial Port y 2 Start your Windows OS Step 3 Press the Download button to start the download process ___Bowrioedfietonx 3 Launch the loader NX win version 2 0 0 1 c Nexo 2004 4 Browse for your dld file to download Press Download file to NX242 button 5 Now to complete the procedure you must set the NX242 to Download mode to make it ready to accept the program Power the TDcontroller OFF and then back on or reset whilst holding down the MUTE button of channel 1 leftmost mute The controller will now enter Download mode First screen displays the revision number of the RS232 Firmware TD CONTROLLER ema PESCH As soon as the message DOWNLOADING WAITING appears you can press the OK button Have a look to the status bar to follow the downloading process The Loader sends the first block of code to the NX242 The NX242 acknowledges the reception both on the computer and in the NX242 s LED screen Downloading continues until the progress bar reaches its leftmost position The number in the lower left corner 60 is a timeout A countdown begins when the transmission is broken wrong com port or disconnected when it reaches zero an error message is generated The download procedure is complete when the unit resets all LED s on Cancel B
7. Commercial and light industrial environment of the product family EMC standard for emission The immunity this word describes the ability to cope with electromagnetic disturbance generated by other items and natural phenomena requirements that we have considered exceed those applicable to the Commercial and light industrial environment of the product family EMC standard for immunity In order to provide a further safety margin we recommend that you do not operate the TDcontrollers in the presence of electromagnetic interference exceeding half of the limits found in this standard These two EMC standards are those applicable to pro audio equipment for the implementation of the EMC directive Amplifier Mixing Desk Analogue signal cables Analogue signals should be connected to the input and output ports of the TDcontroller via shielded twisted pair or starquad cable fitted with XLR connectors on the TDcontroller side We recommend the use of low transfer impedance cables with a braided shield and a transfer impedance below 10 mQ m For the sense inputs the noise requirements are not as stringent and any kind of twisted pair cable will be adequate The TDcontroller is intended to be used with USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 10 ane NO4 TD CONTROLLER SETTING UP ADVICE symmetrical balanced sources for instance a mixer and symmetrical loads for instance a power amplifier see fi
8. Fig 2 This keeps a good capacitance balance for the signal however noise currents flow on the return path of the signal Note that this is only acceptable for a short cable Mixing Desk If you are using a symmetrical balanced source or amplifier which is prone to become noisy when a current of less than 100 mA at the mains frequency 50 Hz or 60 Hz is sourced into pin 1 of its XLR connectors you might consider opening the ground loops NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 eene N42 TD CONTROLLER PAGE 11 SETTING UP ADVICE ENGLISH J High end Floating balanced Input Maximum Clipping input 28dBu Nominal Input impedance 19 8kOhm Common Mode Ratio CMRR 85dB Very High Immunity to common mode interferences NEXO HEADROOM adjustement allows the signal to be scaled to the Analogue to Digital Converter keeping the unity gain of the NX242 High end AD converter 24bit allowing a 110dB Dynamic range analogue to analogue FLOATING BALANCED INPUTS Blanking panel In this slot goes the optional NXtension CAl and NXtension ES4 Expander Boards Os e 4 mr Mure Mute amp Solo Buttons Red LED Muted Channel AN CAUTION RISK OF FIRE DO NOT OPEN Channel monitoring Red LED Peak Limiting Prevent your amplifier from overloading Yellow LED Protections Prevent speaker Displacement and Temperature failures Green LED Signal Monitor amplifier signal amp displays
9. the higher the effect All protections dealing with displacement or acceleration of HF drivers and generally speaking all peak limiter action above 1kHz will be spoiled AS A RESULT NEXO STRONGLY RECOMMENDE NOT TO USE AMPS THAT INVOLVE A D D A CONVERSION PROCESS IT COULD DAMAGE YOUR SPEAKER AND DEGRADE SOUND QUALITY NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 29 ENKI TD CONTROLLER INSTALLATION RECOMMENDATIONS Installation Recommendations Audio Chain Recommendations About Loudspeaker Management Devices The NX242 s factory delay presets are optimised to provide the best possible crossover between the MAIN SYSTEM and SUB systems Optimum results are always obtained for strictly identical signals feeding simultaneously all the NEXO NX242 controllers Typically this signal is delivered by the stereo bus output of a parametric graphic stereo equalizer which is fed by the stereo output of the mixing console Inserting devices such as loudspeaker management controllers that modify the phase relationship between SUB s NX242 and MAIN SYSTEM s NX242 inputs will lead to unpredictable results and will severely damage the final result NEXO strongly recommends avoiding use of such devices Operating SUB s fed through an Aux Output If the SUB s are to be operated through a different output than the main system NEXO strongly recommends that the audio chain is strictly identical for SUB s and GeoT mixin
10. As described before each transducer is individually servo controlled for temperature This means in practice that in case of a potential risk detected protective operation would only affect the concerned driver Your driver will be protected but the overall system tonal balance could be altered if the different channels are not heating at the same time In addition triggering a temperature protection means that the loudspeaker has already lost some efficiency power compression up to 3dB in extreme cases The purpose of interchannel regulation is to cancel that effect by linking VCAs together When the protection is activated on one channel and reaches a predetermined threshold the regulation section begins to correct the balance between the different channels HF MF and LF by acting on the concerned VCA Peak limiter 12 The peak limiter primary function is to avoid massive clipping of the amp which can have some very audible artefacts The threshold of the peak limiter is determined by the user to match its amplifier See in Amplifiers Gain Power page 25 The second function of the peak limiter is to avoid huge amounts of power being sent to a driver Each driver is protected in temperature and displacement but there could be other factors of destruction that cannot be predicted by simulation especially mechanical damage to the cone Each driver is specified for a certain power handling and a factory set peak limiter thr
11. Contrast adjustment A hole in the front panel allows the adjustment of the contrast of the LCD screen Serial link Downloader The unit can be RS232 linked to any PC in order to download new versions of Firmware using a Windows compatible Downloader program See corresponding chapter page 32 NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 19 TNX TD CONTROLLER MENU DESCRIPTION C 2 nes X242 LOAD2 20 gt c NEXO 2004 ENGLISH CD MENU DESCRIPTION On the controller display screen the number before the Function corresponds to the Menu Number To change the first number this is the Main menu label button A must be pressed To change the second number this is the Submenu label button B must be pressed To select options turn the encoder wheel or press the ENTER button 4 Changes are immediate no validation is required unless clearly stated Please refer to the release notes issued with each new download to track eventual menu changes Main Family Selection Changing Cabinet Family In order to prevent end user changing between different NEXO system set ups during use the following procedure is obligatory This procedure has been purposely designed to avoid any mistake It is nevertheless very easy to e gt change set up among the same family see menu 3 TD CONTROLLER Depressing A amp B buttons while the N
12. Input Output See also the wiring recommendations in the setting up advices section at the beginning of this manual Floating balanced audio input A new ruggedized truly floating high end performance Input stage has been developed for the NX242 In the max HEADROOM position it is accepting input level up to 28dBu and keeping this performance when driven by unbalanced impedance sources or when submitted to high common mode level The analogue inputs are on 3 pin female XLR connectors with positive and negative signal polarities on pins 2 and 3 respectively Pin 1 is directly coupled to the chassis The input signal can be adjusted in MENU 1 1 HEADROOM in order to avoid clipping of the A D converter See corresponding paragraph MENU section page 19 Balanced audio output The analogue outputs are on 3 pin male XLR connectors with positive and negative signal polarities on pins 2 and 3 respectively Pin 1 is directly coupled to the chassis The output will deliver a full scale output of 28dBu balanced 600 1nF load During A C power up of the NX242 all outputs are muted by firmware controlled relays strapping pin 2 and pin 3 of each output USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 18 ane 24 TD CONTROLLER BLOCK DIAGRAM DESCRIPTION General functions Remote sense lines Line input 18dB less than the amplifier gain is allowing remote sensing You will need to use this function to have an 18d
13. a ZIP file You will have to extract the contents of this ZIP archive in a temporary directory using third party software such as WINZIP not provided by NEXO Once extracted you should have access to the following files Two download DLD files the last official release version and the newly released version If you experience any problems with the new version simply reload the old DLD program to return the unit to the previous version o AREADME TXT that will contain download instructions o Manual Update pdf which will inform you about all new features of the new LOAD o The downloader programs NXWIN EXE NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 ar Uu TD EEN X242 PAGE 33 NEXO WINDOWS LOADER z LU Execute the following procedure to load the new software into the NX242 Flash EPROM N Nexo Nx241 and Nx242 Firmware Loader GEES 1 Connect the serial cable to the RS232 serial ports on your computer and the NX242 The downloader detects the COM Visite our Web Site NENO www nexo sa com port available on your system If your system is only equipped with USB ports you will have to use an USB COM adapter However you may meet some problems according Step 1 Choose file to download LOAD2_20 dd Browse to the adapter chosen there is a lack of specification on the baud rate of the USB converters leading to an unusual Version Number for Nx241 for Nx242 H b tolerance M Step 2
14. appareil y compris d une mani re quelconque comme le cordon d alimentation amplificateurs qui produisent de la chaleur secteur endommag du liquide renvers ou des objets tant 9 Ne supprimez pas le dispositif de s curit de la prise polaris e tomb s dans l appareil l appareil ayant t expos la pluie ou ou de terre l humidit ne fonctionne pas normalement ou est tomb RISK OF ELECTRIC SHOCK DO NOT OPEN The exclamation point within an bul with autant ionge WARNING To reduce the risk of fire or electric shock cquitateral Geet isintended to symbol within an equilateral triangle is intended to alert the user to the do not expose this apparatus to rain Or moisture alert the user to the presence of presence of uninsulated dangerous important operating and voltage within the product s To avoid electrical shock do not remove covers maintenance servicing instructions A enclosure that may be of sufficient in the literature accompanying magnitude to constitute a risk of Dangerous voltages exist inside the appliance electric shock to persons e uc Refer all servicing to qualified personnel only AVERTISSEMENT Cet appareil appartient la CLASSE 1 et doit tre mis la terre Le conducteur vert et jaune du c ble secteur doit toujours tre connect la terre de s curit d une installation La terre est essentielle pour la s curit du personnel comme pour le bon fonctionnement du
15. complies with Canadian ICES 003 Immunit RF EU EN55103 2 1996 Compatibilit lectromagn tique Norme de famille de produits pour les appareils a usage professionnel audio vid o audiovisuels et de commande de lumi re pour spectacles Partie 2 immunit s Note Les tests de conformit lectromagn tique ont t r alis s avec les c bles recommand s dans ce manuel L utilisation des Le m me c bles est n cessaire afin de rester dans le cadre des r glementations nonc es ci dessus INSTRUCTIONS DE SECURITE IMPORTANTES 1 Lisez ces instructions 10 Prot gez le cordon secteur contre les pincements ou 2 Gardez ces instructions pi tinements en particulier proximit des prises des r ceptacles 3 Tenez compte de tous les avertissements adapt s et l endroit ou il sort de l appareil 4 Suivez toutes les instructions 11 N utilisez que des accessoires ou fixations sp cifi es par le 5 N utilisez pas cet appareil proximit d eau fabriquant 6 Nettoyez uniquement avec un chiffon sec 13 D branchez cet appareil pendant les orages ou lors d une 7 Ne bloquez aucune ouverture de ventilation Installez longue p riode sans utilisation conform ment aux instructions du fabriquant 14 Confiez toute la maintenance du personnel qualifi La 8 N installez pas proximit d une source de chaleur telle que maintenance est n cessaire quand l appareil a t endommag radiateur chauffage po le ou autre
16. detrimental effects induced by very long release time constants coming from the temperature detection signal level being reduced for an extended period pumping effects the detection signal is modulated by another voltage integrated with faster time constants matching the sound level subjective perception This allows the controller to reduce the effective operation duration of the temperature limiter and make it sound more natural while the efficiency of protection is fully preserved and operation thresholds are unaffected kept as high as possible Physiologic Dynamic Control 10 The so called Physiologic Dynamic Control is intended to avoid unwanted effects as a result of a too long attack time constant By anticipating the operation of the temperature limiter it prevents a high level Audio signal appearing suddenly then being kept up for a period which is long enough to trigger the temperature limiter Without this a rough and delayed gain variation would result which would be quite noticeable and unnatural USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 16 TD CONTROLLER BLOCK DIAGRAM DESCRIPTION The Physio control voltage acts independently on the VCA with its operation threshold slightly lower 3 dB that of the temperature limiter and a low compression ratio its optimised attack time constant allows it to start operating without any subjectively unpleasant transient effects Interchannel regulation 11
17. have some advanced functions like those found in the NX242 TDcontroller loudspeaker offset integration limiter compressor These functions are not well adapted to specific system requirements and may interfere with existing protection within the TDcontroller NEXO do not recommend using these functions with the NX242 TDcontroller Amplifier Latency effects on protection In order to provide advanced functions not always relevant for NEXO equipment some amplifiers use a digital preamp section where the analogue signal provided at the input of the amplifier is converted to Digital treated then converted back to analogue before being send to the power stage Such amps are delaying the Peak Limiter no latency signal from the value of the 1 T conversion latency This value reach 1 13ms on the 0 5 CROWN ITECH for instance 0 When you put such a delay between the NX242 _05 TDcontroller and the cabinet it has a strong effect on the 1 0 5 10 15 20 protection by delaying the effect from the cause Peak limiter with 1 13ms amplifier latency 1 T T T Lets take for example a peak 0 5L limiter limiting a 5kHz signal of amplitude 1 with attack and o release set to 2ms You can easily notice that on the 0 5 second axis the effect of delaying the protection has 5 10 15 20 massive effects in fact the Time msec protection doesn t work anymore The higher the frequency
18. specific driver after the crossover rather than the on wideband section This allows to EQ one driver without affecting the others cleaning out of band response fine tuning in a crossover All the parameters are factory set Crossover section 4 Crossover between different bands is tuned for every set up of every cabinet Each crossover is customized so that each transducer will fit with its neighbour by achieving a perfect phase alignment Unconventional crossover defined filters are applied ranging from 6dB octave to near infinite slopes according to the type of crossover desired Time alignment is also unconventionally achieved by combining crossover filter group delays with allpass and or frequency dependent delays User set up Array EQ 5 A basic Array EQ is currently implemented in the NX242 The cut off frequency of a low shelving filter is factory tuned for each cabinet set up The user has access to the gain of this filter The array EQ is tuned in order to reproduce the effect of the bass coupling allowing the user to increase or diminish the effect of the stacking USER MANUAL LOAD2_22 DATE 03 12 2004 Eee N42 TD CONTROLLER BLOCK DIAGRAM DESCRIPTION PAGE 14 HSIT19ON3 L TANNVHO LNdLNO tr ova ke anw SES NOLLVINNIS HV3d uewwiog 3H0LVHIdNAL 4H L isen
19. syst me Elle est connect e l int rieur toutes les surfaces m talliques expos es Des recommandations suppl mentaires pour l interconnection avec d autres quipements se trouvent dans la section Page 44 Audio Equipment 10CE USER MANUAL LOAD2_22 DATE 09 12 2004 ENGLISH ENGLISH ane E PAGE 4 TD CONTROLLER INSTRUCTIONS DE SECURITE IMPORTANTES TABLE OF CONTENT WHAT S REMAIN THE SAME sccsssccsscsstecscessessescocsccecessesstousececesssseseocessecceosavessiesesdsssssoccestececoscessous sa cu destessessseseoscossenesosvesvessaccesessO WHAT T 6 SELECT YOUR CABINET SPT UR enne eethnnnrnn seen nete nnsiss eset setae desi s sessi tasa desides sesta te assesses sese tanda sss sese eta ra dass ee esta sanas 7 NAVIGATING MENUS ae BACK JIODEEAUDR GNU ec ense EIE MI LM PADO SU MAINS POWER EE 8 VOLTAGE SETTING cccccccsssssscecececsesnsaececececsenssaeceeececsenssaeeesececeeeaaeseeececeessaaeeeseeeceenesneaeeeeecsesesaeaesecececssaeseseeesesesesesaeeeeeeeesenseaeees 8 MOUNTING THE TDCONTROLLER IN A RACK GROUNDING SHIELDING amp SAFETY ISSUES seen 8 USE 555 5555 5550 8 RECOMMENDATIONS FOR WIRING THE SENSE LINES sss nensssseseeeesessesoreeerrtesrreretsrsserrrtrntsses
20. zs 29 OPERATING SUB S FED THROUGH AN AUX OUTPUT ccccccccscsssessscecececsessnecesececeesesesesececeessanseeseesceeseaseaeseeeeeceeaeaeseeseeesenseaeees 29 OPERATION OF MULTIPLE TDCONTROLLERS SYSTEM E EC UN GEOMETRICAL ALIGNMENT MEASURING AND ALIGNING PHASE IN THE OVERLAPPING REGION EH e LEE 32 CONNECTION FROM NX242 RS232 9 PIN SERIAL PORT TO PC S COM PORT eee eeee eren enses eee sn sese se esee seen sese sees e DZ Lig uo BO L EEN 32 APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND meenennnnenerenennnnnsnnee 35 WHAT IS THE PHASE RELATION BETWEEN THE AUX AND MAIN OUTPUT OF YOUR DESK WHY IT IS UNLIKELY THE AUX AND MAIN HAVE THE SAME PHASE CONSEQUENCES OF BADLY ALIGNED SYSTEMS ccce nhe ener enne th nnn nnns stent teneas sess ee nete ga ss sess sese tage s assesses e ta rasa assess aea aa PRECAUTIONS AGI II E APPENDIX A LIST OF SUPPORTED PRESETS LOADD2 22 creer ener enne eene s ense tn sensn estu nn 37 USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH ENGLISH PAGE 6 ane 4 TD CONTROLLER NX242 VERSUS NX241 WHAT S NEW NX242 versus NX241 What s new The NX242 Digital TDcontroller has been designed in order to provide total compatibility with its predecessor the NX241 Digital TDcontroller What s remain the same The DSP resources for both models remain the same so new supported set ups i e firmware loads will be com
21. 2 DATE 03 12 2004 ENGLISH PAGE 38 APPENDIX A LIST OF SUPPORTED PRESETS LOAD2 22 DIGITAL TD CONTROLLER NX242 ALPHATD B1 M3 Xover for CD18 Bi ALPHATD B1 B1 M3 Bl on ch 1 and 2 PS8TD Wideband NO SUB PS8TD crossover With LS400 PS10TD Wideband NO SUB PS10TD Crossover With LS500 PS15TD Overlap Same as ch 2 Same as ch 2 B1 15 B1 15 LS400 LS500 PS8 left PS8 left PS10 left PS10 left PS8 right PS8 right PS10 right PS10 right Same as ch 2 LS1200 PS15 left PS15 right With LS1200 PS15TD Crossover Same as ch 2 LS1200 PS15 left PS15 right With LS1200 PS15TD Crossover Same as ch 2 S2 PS15 left PS15 right With S2 PS15 active PS15TD ActiveXOV LF Left LF right HF Left HF right LF 1 2 HF 3 4 PS15TD Active LF Left LF right HF Left HF right LF 1 2 HF 3 4 PS15TD ActiveXOV 52 LF HF S2 2 LF 3 HF 4 GeoS 805 CD12 S805 4 8 boxes S805 left S805 right No Sub S805 9 16 boxes S805 left S805 right No Sub S805 4 8 boxes S805 left 805 right Stereo FLW Xover S805 9 16 boxes x S805 left S805 right Stereo FLW Xover S805 4 8 boxes S805 left S805 right Stereo Grd Xover S805 9 16 boxes S805 left S805 right Stereo Grd Xover S805 4 8 boxes CD12 bac CD12 front S805 Same as ch 3 ono CD12 Flown S805 9 16 boxes CD12 bac CD12 front S805 Same as ch 3 ono CD12 Flown S
22. 805 4 8 boxes CD12 bac CD12 front S805 Same as ch 3 ono CD12 Ground S805 9 16 boxes CD12 bac CD12 front S805 Same as ch 3 ono CD12 Ground NX242 USER MA DATE 12 3 2004 NUAL LOAD2 22 ENKI TD CONTROLLER PAGE 39 APPENDIX A LIST OF SUPPORTED PRESETS LOAD2 22 GeoS 805 CD18 S805 4 8 boxes ENGLISH CD18 back CD18 front S805 Same as ch 3 Mono CD18 Ground S805 9 16 boxes CD18 back CD18 front S805 Same as ch 3 Mono CD18 Ground GeoS 830 CD12 830 horizonta 5830 left 830 right wideband stereo 830 horizonta CD12 back CD12 front S830 Same as ch 3 with CD12 Flown 830 horizonta CD12 back CD12 front S830 Same as ch 3 with CD12 Ground GeoS 830 CD18 830 horizonta CD18 back CD18 front S830 Same as ch 3 Mono CD18 Ground GeoT 4805 GeoT 4805 2815 Back speaker Front speaker HF Crossover 75Hz GeoT 4805 2815 Back speaker Front speaker HF Crossover 100HZ USER MANUAL LOAD2 22 DATE 03 12 2004
23. A B amp ENTER 4 gt at the same time Selecting cabinet family Simultaneously depressing A amp B buttons at power up or during device RESET accesses the system change menu Keep the A amp B Buttons held until all LEDs are off This will allow the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and press ENTER 4 gt to load the required settings Select your cabinet set up In MENU 3 0 you will be able to choose among the different set ups within the same cabinet family i e you don t have to modify the amplifier to cabinet wiring Navigating menus On the controller display screen the number before the Function corresponds to the menu number To change the first number this is the Main menu label button A must be pressed To change the second number this is the Submenu label button B must be pressed To select options turn the encoder wheel or press the ENTER button 4 Changes are immediate no further confirmation unless clearly stated Back to default In Menu 2 5 you have the possibility to put back all MENUS to the factory default except the amplifier information that you have entered MENU 2 6 amp 2 7 Auto save In case of power failure the current set up is saved two minutes after the last change made At power up the last saved settings are restored USER MANUAL LOAD2 22 DATE 03 12 2004 PAGE 8 ENGLISH ane N42 TD CONTR
24. B gain attenuator near the amplifier This function enables you to keep the TDcontroller at the mixing position and still being able to feed an attenuated amplifier voltage for safety reasons to the sense line connector Reset Holding down the three menu buttons A B simultaneously will reset the unit Reset has the same effect as powering on and off the unit The unit will mute hardware for 5 seconds with all LED s on The unit will then return to the last set up automatically saved every 2 minutes Resetting the unit from the front panel is needed to change the cabinet family Press the three buttons to reset then let go of the ENTER button to enter into MENU O In that case you will have to keep the A amp B Buttons until all LEDs light off Mute Solo buttons Front panel direct access The Mute or Solo mode is selected in the user menu Please note that these MUTEs are soft mute and are therefore not operating output relays Display amp Indicators User control of all settings is via two menu scroll pushbuttons an additional assignable pushbutton an assignable rotary encoder and a backlit 16 2 character display Three LED s per channel for sense green peak limit red protects yellow Four dedicated LED s are situated alongside the associated MUTE SOLO button Two LED s to indicate input overload and signal clipping into the DSP Default screen will pop up after 2 minutes and display the current set up
25. E 6 The NX242 now HAS to be reset AGAIN to enter the configuration menu Turn the unit OFF wait 5 seconds and then power back ON or hold down simultaneously the three menu buttons A B 4 gt Loader WD6 1 3 0 0 on 16 04 2002 Out 4108 B In 4B Currently Sending Block 3 i Sebel Hold down the two menu buttons A B to enter the BHEEHBEEEBE Configuration Menu to choose your cabinet Loader WD6 1 3 0 0 on 16 04 2002 The unit is now ready for use lOut26680B nipp Ack Sending Block 14 Ad 08800 USER MANUAL LOAD2 22 DATE 03 12 2004 PAGE 34 TD CONTROLLER TECHNICAL SPECIFICATIONS ENGLISH TECHNICAL SPECIFICATIONS NX242 Digital TDcontroller SPECIFICATIONS Output Level Dynamic Range THD Noise Latency time Power Supply FEATURES Audio Inputs Sense Inputs Audio Outputs Processing Front Panel Rear Panel FLASH EPROM Dimensions amp Weight User Controls System Selection System Set up Protection Delay Headroom Output Gain Amplifier Gain Reading Mute Solo Save Recall Array EQ Security Mode Certification 28 dBu Max into 600 Ohms load All Channels 110dB unweighted Typical 0 005 flat setup Max 0 01 1000HZ 28dBu 2 2ms on a flat setup 115 230 Volts 50 60Hz continuous operation operating range 90 264V Two L amp R Heavy Duty Audio inputs 24bit convertors Elec
26. OLLER SETTING UP ADVICE Setting Up Advice A A Mains Power WARNING THIS APPLIANCE MUST BE EARTHED The green and yellow wire of the mains cord must always be connected to an installation safety earth or ground The earth is essential for personal safety as well as the correct installation of the system and is internally connected to all exposed metal surfaces Any rack framework into which this unit may be mounted is assumed to be connected to the same grounding circuit see also p 8 NEXO TDcontrollers don t provide a mean to switch off the unit from the front panel As they are intended to be rack mounted the back panel is not accessible during use Therefore it is left to the user to provide a disconnection mean readily operable Voltage setting NEXO TDcontrollers use a switch mode power supply SMPS This SMPS accepts universal AC power input voltages in the range 90V to 264V and requires no manual adjustment for voltages in this range Mounting the TDcontroller in a rack Grounding shielding amp safety issues The TDoontroller is intended for rack mounting The only accessible part during use shall be the front panel of the TDcontroller Any space above or under the TDcontroller shall be obstructed with a blank panel The rack is a free grounding and shielding structure and it provides extra shielding Therefore it is desirable that the screws used to fix the TDcontroller in the frame or rack provide an electrical c
27. The earth is essential for personal safety as well as the correct operation of the system and is internally connected to all exposed metal surfaces Additional recommendation for interconnection to other equipment can be found in the Setting Up Advice section page 8 NX242 USER MANUAL LOAD2 22 DATE 12 9 2004 PAGE 3 nee NX4 TD CONTROLLER INSTRUCTIONS DE SECURITE IMPORTANTES D claration de conformit Cet quipement a t test et r pond aux objectifs de s curit et exigences essentielles de la directive 73 23 EEC sur les basses tensions et la directive 89 336 EEC sur la compatibilit lectromagn tique notamment S curit lectrique EU IEC 60065 12 2001 Appareils audio vid o et appareils lectroniques analogues Exigences de s curit S curit lectrique US UL60065 Seventh Edition dated June 30 2003 category AZSQ E241312 S curit lectrique CAN CSA C22 2 N 60065 03 Edition dated April 2003 category AZSQ7 E241312 S curit lectrique Reste du Monde Certificat OC DK 8371 bas sur IEC60065 2001 7eme ed Toutes deviations Emission rayonn e EU EN55103 1 1996 Compatibilit lectromagn tique Norme de famille de produits pour les appareils a C UL US usage professionnel audio vid o audiovisuels et de commande de lumi re pour spectacles Partie 1 missions Emission rayonn e US FFC part15 class B LISTED Emission rayonn e CAN This Class B digital apparatus
28. X242 is resetting S You can reset the unit without powering off by simultaneously depressing buttons A B amp ENTER at the same time Note Selecting a new family will set all parameters to factory default settings User settings 1 1 HEADROOM EXESEREENS NY 4 Allows the user to adjust the headroom 8 steps 3dB each before the A D converter without changing the overall gain Min BEDS T x of the processor Factory default is set to maximum aee headroom and so maximum noise This can be adjusted i i Pan oo if you feel the processor is too noisy for lower level Le applications An Input bar graph meter displays input level and headroom before input clip The maximum of the left and right input is shown on the meter Note that the meter does not show DSP clipping USER MANUAL LOAD2_22 DATE 03 12 2004 ENGLISH ENKI PAGE 20 TD CONTROLLER MENU DESCRIPTION The input meter is accessed through the MENU 1 1 EEN X247 HEADROOM by depressing ENTER lt P button Press the ENTER lt gt button to toggle between the meter and Hin BERE Max the normal HEADROOM screen Note In meter mode the iat lt i gt default screen is not activated LE A B EN AA TD CONTROLLER m Global DH Em 1 2 Delays jJ A B CIERTA N24 I bal H GE 1 3 B The meter also pops up automat
29. arious detection sections That synthesis is in fact the envelope of those signals with an optimised release and attack time for each VCEQ and VCA depending on its frequency range and the cabinet selected Displacement control 8 The sense input signal is sent to a shaping filter producing a signal whose instantaneous amplitude is proportional to the voice coil excursion This signal after rectification is compared to a preset threshold matching the maximum usable value as determined from laboratory measurements Any part of the signal exceeding the threshold is sent to the VCEQ control buffer while the VCEQ acts as an instantaneous limiter very short attack time to prevent displacement from overriding the maximum permissible value Temperature control 9 Each sense signal is fed into a shaping filter one per transducer each one producing a signal proportional to the instantaneous current flowing into the voice coil of the transducer After rectification this signal is integrated with attack and release time constants equivalent to the thermal time constants of the voice coil and chassis producing a voltage which is representative of the instantaneous temperature of the voice coil When this voltage reaches the threshold value corresponding to the maximum safe operation temperature the VCA becomes active to reduce the Audio signal level and limit the effective temperature to fall under the maximum usable value In order to avoid
30. assword is NEXO This allows you also to get into an INSTALLER menu Please contact your NEXO dealer if access required 2 3 Reserved This menu was formally used in the NX241 to control the EARTH LIFT This function is not available anymore in the NX242 due to a change in our ground plane politic To keep the coherence of the MENUs between NX241 A NX242 we have nevertheless keep this slot unused 2 4 SENSE GAIN Allows switching between line level sense lines and amplifier level sense lines 0 or 18dB gain on the sense line 2 5 Restore Default Restores the factory defaults System related values like the AMP GAIN and AMP Power will not change NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 nee 24 TD CONTROLLER MENU DESCRIPTION PAGE 23 ENGLISH ne X 24 TD CONTROLLER IL La gt aain Chi 26 BE T Pire sen nr e A B TD CONTROLLER 4 Chi 1z lrmz B3 gt Ze AME Power ro PRESS TD CONTROLLER TERENA RESET HME OCH EC nn ES ES me B gt Ze DHIN ed exem N04 TD CONTROLLER ris are Or ml m m Jai oc lider co iii i Hs 4 F NN x w Configuration select TD CONTROLLER TEENA ALFHATD S2 E me o 4 1 Sasinm confis Lo d A B 2 6 AMP GAIN Adjustable from 20dB to 40dB nominal Amp Gain in 0 5dB steps f
31. ations Commission helpful How to identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington D C 20402 Stock No 004 000 00345 4 Use of a shielded cable is required to comply within Class B limits of Part 15 of FCC Rules Pursuant to Part 15 21 of the FCC Rules any changes or modifications to this equipment not expressly approved by NEXO S A may cause harmful interference and void the FCC authorization to operate this equipment RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture To avoid electrical shock do not remove covers Dangerous voltages exist inside Refer all servicing to qualified personnel only The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance WARNING This appliance is a CLASS 1 apparatus and must be earthed The green and yellow wire of the mains cord must always be connected to an installation safety earth or ground
32. atus has been exposed to rain or moisture does not operate normally or has been dropped Information about products that generate electrical noise NOTE The United States Federal Communications Commission in 47 CFR 15 105 has specified that the following notice be brought to the attention of users of this product This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help The user may find the following booklet prepared by the Federal Communic
33. d to adjust the tonal balance of the system by acting on separate channels You can also compensate for gain differences between different amplifiers Although the use of differing gain structure amplifiers in the same set up is possible it is not recommended Each of the individual or global gain is 6dB Step NX242 USER MANUAL LOAD2_22 DATE 12 3 2004 PAGE 21 ENKI TD CONTROLLER MENU DESCRIPTION ENGLISH 0 5dB 1 4 Mute Solo TEETAN A22 Allows the user to switch the function of the front panel Mute channel buttons between Mute and solo mode 1 4 HMute 2ola Individual channel muting is made in the DSP processor Ld itself However when all 4 MUTE buttons are active the output relays bypass the circuitry to eliminate any residual noise 1 5 SAVE Set up It is possible to store and recall up to 10 user set ups but excluding MUTE BUTTONS STATE eene N42 TD CONTROLLER Additionally the current set up is saved in case of power gt failure every two minutes after the last change At power up Gis des des o f 8 I RTI 4 Pressel LiDE 1 5 Save Selue this set up is restored 5 Set ups are numbered from 1 to 10 When saving your set up you can choose a reference name up to 6 characters for identification purposes NOTE ALL SAVED SETUPS WILL BE ERASED WHEN DOWNLOADING A NEW VERSION OF THE SOFTWARE ENCRES V y24 1 6 RECALL Set up SE F Recallin
34. displays the value the NX242 has found by scanning the highest peak value reached during amplifier clipping To properly set the user amp power value please follow the following steps NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 nee 24 TD CONTROLLER PAGE 27 ENGLISH AMPLIFIERS GAIN POWER 1 Unplug all loudspeaker cabinets in the system 2 Set the NX242 on the 4 S2 cabinets S2 80 Hz setup 3 Ensure that the amp volume controls are set to maximum i e no attenuation 4 Ensure that the menu 2 7 user value is put to 5000W so the peak limiting will not interfere with the measurement 5 Feed Pink noise into the system until the amplifier is consistently clipping 6 Read the value from the display and enter it in the user value The Amp power reading is a real time process and will also display a measurement while operating the system on real conditions However the result may slightly vary according to the setup the frequency of clipping interactions with protections exem O42 TD CONTROLLER Menu 2 8 Sense Alerts amp reset In addition to the Amp Gain display in MENU 2 6 LED visual alerts will be triggered if user gain and read gain are not the same Note that there are no visual alerts on the POWER i computations in MENU 2 7 Amp power Nod N The measured gain value is under user gain sense oO O o O and thus the system is over protected os Ba
35. e types may degrade EMC performances IMPORTANT SAFETY INSTRUCTIONS 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet US market 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the appar
36. ectly together and providing the best efficiency possible It is then up to the user to adjust the delay on the NX242 to match the physical path difference of the different systems It is thus possible to get a well adjusted system even without measuring instruments If you choose to drive the Sub from the AUX you feed the NX242 with two signals coming from different sources If those two sources MAIN output amp AUX send are not exactly in phase you are introducing a delay without knowing it into the crossover between your main system and your sub Without the proper measurement tools you will never be able to tune the system as it should be Why it is unlikely the AUX and MAIN have the same phase Signal paths are likely to be different any filter modifying the bandwidth and EQ of the signal is also affecting the phase Example a 24dB oct high pass filter set at 15Hz is only affecting amplitude of the signal by 0 6dB at 30Hz but the phase shift is 90 At 100Hz we can still measure 25 of phase shift Should you want to restrict the bandwidth with a low pass filter you can introduce a phase difference of up to 180 completely out of phase at the cross over point If the signal is passing though any digital equipment you are adding between 1 4ms and 2 2ms around 70 phase shift at 100Hz due to the converter delay only The additional delay due to the processing itself look ahead compressor delay can be quite important A
37. eerretsesseriretrtstenrrern es resrronenessesere enne 9 RECOMMENDATIONS FOR WIRING THE AUDIO OUTPUTS entr nandi seen entere nass sisse ette na sense reete nenas 9 ELECTROMAGNETIC ENVIRONMENTS E H ANALOGUE SIGNAL CABLES 9 GLOBAL ARCHITECTURE sis ER TER L 2 SET UP CONFIGURATIONS ERR TET T TETTE eei e EOUATISA TION amp FILTERING vissii sssosesessessrasot LO SUBSONIC AND VHF FILTERING 1 EQUALISING WIDEBAND ACOUSTICAL RESPONSE OO 13 EQUALISING SINGLE COMPONENT RESPONSE 3 es enne enne LO CROSSOVER SECTION LI USER SET UP ARRAY EQ 5 INN e RL E VCAS 6 AND VCEQS 7 DISPLACEMENT CONTROL CREME TEMPERATURE CONTROL Eet tele me A Eege SE Eege EE PHYSIOEOGICDYNAMIC CONTROL RE INTERCHANNEL REGULATION 1 I nei E sancti eh dsc cuadesadcnees E E AEE E E EEEE PEAK LIMITER d PAP M DELAY amp POLARITY INVERSION 13 FACTORY EE S MR BEN EE EE E E SS EE AUDIO INPUT OQUTPUT VG e FLOATING BALANCED AUDIO INPUT WE 17 BALANCED AUDIO OUTPRUT treset rt rett trte se rtrt tS ESSE nEn E EEES PESEE EEn ES ESSE EEE ESES SE EEEE ES ESEESE EEE ESES reen essere en ee 17 GENERAL ager C
38. ents without affecting it s headroom 28dBu and performance The NX242 Digital TDcontroller uses a switch mode power supply SMPS This SMPS accepts universal AC power input voltages in the range 90V to 264V and requires no manual adjustment for voltages in this range The NX242 is designed to accept the optional NXtension board with the ES 4 EtherSound interface and the CAI interface whereas the NX241 can only accept the CAI interface An external LCD contrast adjustment is now provided on the NX242 NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 7 ENKI TD CONTROLLER QUICK START This section contains a summary of the most frequently asked questions by people who haven t read the manual You may be able to use the NX242 TDcontroller quite quickly as it has been designed to be user friendly However please devote some attention to reading this manual A better understanding of specific features of the NX242 TDcontroller will help you to operate your system to its full potential ENGLISH WARNING Information on the amplifiers used is MANDATORY Before using your system you MUST configure MENU 2 6 AMP GAIN and MENU 2 7 AMP POWER Failure to do so or to properly connect the Sense Lines will invalidate the NEXO warranty on the attached NEXO loudspeakers See in Amplifiers Gain Power page 25 the correct way to do so RESET You can reset the unit without powering off by simultaneously depressing buttons
39. eshold is tuned to avoid any abuse Delay amp polarity inversion 13 Input to output delay without filtering is 2 2ms due to the digital processing The latency time of the NX241 used to be 1 4ms Since the LOAD2 21 the latency time of the NX241 has been artificially extended to 2 2ms to achieve phase compatibility with the NX242 and so the delay between the 2 units is less than a sample For that reason Do not mix NX241 with a LOAD earlier to 2 20 with the NX242 This delay will prevent also compatibility with analogue TDcontrollers ANALOGUE AND DIGITAL TDCONTROLLER SHOULD NOT BE MIXED IN THE SAME SYSTEM Factory set up delay Note that each output may contain a small phase adjustment delay at the crossover point Also a polarity inversion may be performed These adjustments are part of the factory set ups and are necessary to time align the corresponding cabinet that is selected NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 NX242 PAGE 17 TD CONTROLLER BLOCK DIAGRAM DESCRIPTION ENGLISH User set up delay Following user delay adjustment is possible GLOBAL Affecting all channels at the same time delaying all the system for application as delay towers MAIN Affecting only the channels driving the MAIN system differ in case of TWO cabinet or 3WAY cabinet SUB Affecting only the channels driving the SUB system GLOBAL and MAIN SUB delays are cumulative up to 150m per channel about 450ms 500 feet Audio
40. g a user set up is forbidden if the family of cabinet rPezeLs cci d is not the same 1 6 Recall Getup When recalling a set up the unit will stay in the recall menu 8 allowing another selection for comparison Switching from a set up to another is glitch free and instantaneous no muting takes place 1 7 Array EQ emm NO Me T or Feeney aco ue Gain 4B BdB PRET corsier Array EG Frequency a Gain 1 7 Array EG ve n SSSR e LC 6 000 8 000 10 00 24 USER MANUAL LOAD2_22 DATE 03 12 2004 ENGLISH PAGE 22 ane E TD CONTROLLER MENU DESCRIPTION System settings PE TD CONTROLLER Load LOA 2 1 Revisions gd Loy A B exem N04 TD CONTROLLER Password Fee at o a od Amori a Loy A B Pen TD CONTROLLER TD CONTROLLER TENK 2 1 Revision soft amp hard rev Displays the revision number of the LOAD DSP SOFTWARE FLASH BOOT HARDWARE and SERIAL NUMBER Turn the encoder to access to the different revision screens Check on our web site www nexo fr if your unit is updated 2 2 Security password The user password facility allows switching between free access unit locked and Change password The factory default p
41. g board outputs same devices with same settings phase relation between the two feeds is aligned with proper measurement tools SMAART Spectralab MLSSA see below See also the application note page 35 Operation of Multiple TDcontrollers Typically MAIN SYSTEM SUB systems require a minimum of two NX242 s per side one NX242 for MAIN SYSTEMS another for the SUB s Eventually two or more NX242 s will operate within the same MAIN SYSTEM cluster It is mandatory to verify the consistency of the setups and adjustment between processors to avoid the problems described below When using multiple NX242 s in a single array all parameters should be identical and set to proper values System alignment For a given measurement microphone or listening position the reference point for this adjustment is the closest point of each array SUB and Main System to the given position see example below USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH ENGLISH PAGE 30 TD CONTROLLER INSTALLATION RECOMMENDATIONS We recommend that the system is adjusted so that arrivals from MAIN SYSTEM array and SUB speakers are coincident at a fairly distant listening position typically further than the mixing position Geometrical alignment In the example below r being the smaller distance from MAIN SYSTEM array to listener position and r being the smaller distance from SUB to listener position the distance difference is the
42. gure You can see that the TDcontroller provides a low impedance path between pin 1 of its XLR connectors and its chassis The TDcontroller can sustain high current in pin 1 without degradation of output noise We recommend that the sources and loads you use have the same desirable characteristics It is sometimes claimed that connecting cable shield at both ends creates ground loops and that the current flowing in such loops will produce noise This is not the case for most professional audio equipment In short there are two kinds of loops in which voltages are present the loops formed by signal wires and the loops formed by grounded conductors among which are protective earth conductors PE and signal cable shields When a cable shield is grounded at both ends a loop is closed and the resulting current causes a reduction of the voltage induced on signal lines This effect is what the cable shield is intended to produce since this is how it protects your signal from magnetic fields If you are using an asymmetrical unbalanced source not recommended itis best to use a shielded twisted pair and to connect wire 3 of the cable to the shield at the source output end see figure This technique prevents noise currents flowing on the return path of the signal If you are using an amplifier with an asymmetrical unbalanced input it is best to use a shielded twisted pair and to connect wire 3 at the TDcontroller end only as shown in
43. ically when the signal is above a certain threshold The red arrow above illustrates the Headroom available before clipping of the input converters of the NX242 The dynamic range of the meter is 24 dB The scale is given below maximum being OdBFS the red LED marked in clip will light A permanent peak hold allows you to see if input clipping has reached Changing the headroom by turning the wheel resets the peak hold indication You can also reset the peak hold without changing the headroom by pressing the enter lt P button twice To set the HEADROOM correctly feed a typical example of the loudest desired program level into the NX242 Reduce the Headroom by turning the wheel anti clockwise until the INPUT LED or DSP LED indicates the NX242 has reached clipping Then go one click backwards turn the wheel clockwise The signal should now be clearly visible on the meter scale but without reaching the right hand end of the display 1 2 DELAYS Sub Main Global Each output channel can be delayed by up to a maximum global individual delay of 450ms 150m See page 17 The unit can display in FEET METRES SECONDS as required Delay is adjustable in 10cm 0 3ms increments The control pot will accelerate through the adjustments faster according to the speed of use 1 3 OUT Levels Global HF MF LF SUB Adjust overall amp separate TDcontroller gain with this menu These gain controls are provide
44. ignment Phase alignment can be considered as correct when phase is coincident over the entire overlapping range typically an 1 octave from 60 Hz to 120 Hz and when the overall response is always superior to SUB s and MAIN SYSTEM s individual response USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 32 TD CONTROLLER NEXO WINDOWS LOADER NEXO Windows Loader This manual provides general downloading instructions ONLY Please read the specific instructions readme txt that come with each new LOAD file The NEXO download software is win32 compatible and has been tested on the Microsoft Windows 95 98 2000 and XP The use of any COM port is supported The use of USB COM adapter will depend from an adapter to the other The NXWIN Loader software is NX241 amp NX242 compliant and only one DLD file is issued for the two TDcontroller Warning The latest version of the downloader program NXwin exe provided with each set of upgrade files must ALWAYS be used A NULL MODEM or LAPLINK cable is required to connect your PC s RS232 serial port to the NX242 s RS232 serial port Connection from NX242 RS232 9 Pin Serial Port to PC s COM port NX242 RS232 serial port PC COM port 1 Unused 1 2 RXD Receive 3 3 TXD Transmit gt 2 4 Unused 6 5 SGND Signal ground 5 6 Unused 4 7 Unused 8 8 Unused 7 9 Unused 9 Instructions The files needed to execute your download will be provided as
45. in but only within a given product range like higher gain on all semi professional amps Even if a manufacturer is conscious of this problem and applies the constant gain rule to all its models the value he chooses is not necessarily the same as other manufacturers How to set correct GAIN and POWER information in the NX242 Menu 2 6 Amp Gain Per AA LR The first line of the display shows the value entered by the user Pda mum hereafter referred to as user gain while the second line lt Paces erie ahead ENEE d displays the value read by the NX242 directly from the sense Read Gain Z amp dB lines hereafter referred to as read gain The enter lt gt button i allows the user to swap between channels USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 26 ane 4 TD CONTROLLER AMPLIFIERS GAIN POWER The NX242 will display the following messages Read gain 26 0dB The last measured gain value No Reading yet The average of the output signal is too low lt 28dBV to compute the amp gain You will also be warned of any setup problems with LED alerts see MENU 2 8 This read gain value is intended to help you to check the actual measured gain of your amplifier The user gain and the read gain should be the same IMPORTANT Bear in mind that any changes made in the MENU are only saved when the NX242 returns to its default screen showing the current cabinet family or whe
46. l The measured gain value is above the user gain sense et O O O and thus the system is under protected Small differences are allowed i e there will be no alert if the measured gain is more or less than 1 dB of what the user has entered The first section of Menu 2 8 allows you to reset the gain and power reading to default settings If the enter lt button is pressed the values are reset and menu 2 6 is displayed again Use this feature if any physical changes have occurred in your system to start again the measurement process Turn the encoder wheel to reach the second section of Menu 2 8 which is the alert disable menu Press the enter lt gt button to set the alerts Led flashing on or off Once disabled the LEDs will not flash if gain settings are incorrect This parameter is saved every time the NX242 returns to the default screen or when a setup is saved in the menu 1 5 USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 28 TD CONTROLLER AMPLIFIERS GAIN POWER Gain value NEXO recommends low gain amplifiers 26dB is recommended as it is at the same time adequately low and quite common This considerably improves signal to noise ratio and allows all preceding electronic gear including the TDcontroller to operate at optimum level Remember that using a high gain amplifier will proportionally raise the noise floor level by the same amount Advanced protections Some high end amplifiers may
47. like the Alpha M3 or CD12 CD18 subs may be configured to receive either LEFT RIGHT or LEFT RIGHT inputs The Left and Right gt mode sums the two inputs together but attenuates the level by 6dB to compensate 8 It is thus possible to drive the main system from the LEFT input while the sub is driven by the RIGHT input and fed to the AUX of the mixing desk However some precautions must be taken while splitting the system between MAIN and AUX outputs of the mixing desk See the application note at the end of this manual NX242 USER MANUAL LOAD2_22 DATE 12 3 2004 PAGE 25 ENKI TD CONTROLLER AMPLIFIERS GAIN POWER ENGLISH Amplifiers Gain Power Power NEXO recommends high power amplifiers in all cases Budget constraints are the only reason to select lower power amplifiers If an incident occurs on an installation without protection the fact that amps only generating half their rated output power 3dB are used will not change anything in respect of possible damage This is due to the fact that the RMS power handling of the weakest component in the system is always 6 to 10 dB lower than the amps ratings Current rating It is very important that the amplifier behaves correctly under low load conditions A speaker system is reactive by nature on transient signals like music it will require much higher instantaneous current than its nominal impedance would indicate four to ten times
48. more Amplifiers are always specified by continuous RMS power into resistive loads which is irrelevant the only useful information in that respect is the specification into a 2 ohms load It is possible to make an amplifier listening test by loading them with twice the number of cabinets considered for the application 2 speakers per channel instead of one 4 instead of 2 and modulating at high level onset of clipping If the signal does not noticeably deteriorate the amplifier is well adapted overheating after approximately ten minutes is normal but thermal protection must not operate too quickly after starting this test Amplifier gains As you already read in the Quick Start section Information on the amplifiers used is MANDATORY This value is the key of a correct protection setting It is very important to know the gain and power of all amplifiers present in your set up The NX242 Digital TDcontroller provides tools to help you in this task although the process in not totally automated for safety reason Some amplifier brands have an identical input sensitivity for models of different power rating this means DIFFERENT GAIN for each model This problematic practice inherited from non professional applications is easily detected when the manufacturer specifies the same input sensitivity for all its range like 775mV OdBm or 1 55V 6dBm This translates to very high gain values on higher power models Other brands do offer constant ga
49. n a setup is saved in MENU 1 5 gain amp power settings are common to all presets Do not turn off your NX242 before saving the amplifier settings NB Even when not in use do not leave sense inputs floating connect them to an amplifier output or short circuit the sense input to avoid cross talk or interference in the sense circuitry Otherwise false error messages could result The gain value is not modified even if the amplifier has reached its clip point In the case of continuous clipping of the amplifier output the NX242 will display the wrong gain value of because the amplifier is no longer working linearly anymore Some amplifiers reduce their output gain when overloaded This may be seen on the NX242 s computed gain If the Input LED or the DSP LED are lit the computed value of the gain may be false Please increase the Headroom value in Menu 1 1 IMPORTANT NEVER insert digital equipment or any kind of signal processing delay lines digital EQ amplifier DSP modules between the output of the NX242 and the input of the loudspeaker cabinet This is because any alteration to the signals may interfere with the sensing amp protection algorithms Menu 2 7 Amp Power This menu will help you to enter the amplifier power value into your NX242 This power value will be used to determine the threshold of the peak limiters The first line of the menu displays the amp power entered by the user in the NX242 The second line
50. n linked Allows to adjustment the input sensitivity while keeping an overall unity gain Global and inter channel gain 6dB in 0 5dB steps Allows amplifier gain checking with program material Changes front panel buttons from Channel Mute to Solo Set up Stores up to 10 user set ups On the fly recall without mute or glitches for instant comparison LF or HF shelving filter to compensate ground or stacking effects 6dB frequency factory tuned Password protected in Read Only Mode CE mark EN 60065 1998 EN55103 1996 cULus approved UL60065 FCC part15 compliant CB scheme NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 NAH PAGE 35 TD CONTROLLER ENGLISH APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND Application Note Driving the Sub from the AUX send It is quite common to use the AUX send of a mixing desk to drive the Sub section of a PA system This gives the mixing engineer more flexibility to set the level of its subbass relative to the main PA apply special effects use a different EQ on the Sub However it also rises some serious issues for the performance amp safety of the system mostly time alignment What is the phase relation between the AUX and MAIN output of your Desk At NEXO when we align systems we take great care to have an optimum phase alignment from one octave above to one octave below the crossover frequency point By doing so we ensure that both drivers are working perf
51. n r r specified meters or feet r4 gt r5 the delay should be set on the SUB NX242 TDcontroller s r lt r5 the delay should be set on the MAIN SYSTEM NX242 TDcontroller s To convert the result in time delay specified in seconds apply t r r C r and r in meters C sound speed 343 m S The delay parameter is set in MENU 1 2 set the units to meters feet or seconds according to your preference However it is a safe practice to double check geometrical alignment with a proper acoustical measurement tool Measuring and aligning phase in the overlapping region Microphone must be set on the ground at a fairly distant listening position typically further than the mixing position Phase must be measured with a wrapped display and measurement must be properly windowed on signal arriving time same window for SUB and MAIN SYSTEM When measurement is synchronized to the system microphone distance phase can be clearly displayed in the low frequency range NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 31 nee N4 TD CONTROLLER INSTALLATION RECOMMENDATIONS If the MAIN SYSTEM phase reading appears to be superior to the SUB phase reading then MAIN SYSTEM will have to be delayed with a value close to the one given by the geometrical alignment ENGLISH If SUB appears to be in advance to MAIN SYSTEM then SUB will have to be delayed with a value close to the one given by the geometrical al
52. n the amplifier racks an unshielded cable may be used If the TDcontroller is located remotely at the mixing position a shielded cable is recommended without using the shield as a conductor The cable must be well protected from public access as it carries potentially dangerous amplifier voltage When one of the channels is not being used and the corresponding sense line is disconnected cross talk onto the inactive sense line may in some cases produce signals capable of causing the inadvertent illumination of the Sense LED on that channel although this has no effect on the internal operation of the TDcontroller it can be cured by short circuiting the terminals of the inactive sense line Recommendations for wiring the audio outputs The output stages can drive several amplifiers in parallel however it is not advisable to work with loads of less than 1kOhm and strictly forbidden to drive less than 600Ohms It is best to check the impedance characteristics of the amplifier inputs supplied by the manufacturer to check how many amplifier channels can be paralleled Where precise information is not available and taking 10kOhm as the minimum value possible ten channels in parallel per output is a sensible maximum Electromagnetic environments The emission this word describes all types of electromagnetic noise radiated by the equipment requirements which have been applied to Nexo s TDcontrollers are the stringent requirements of the
53. ontact between the chassis of the TDcontroller and the rack The primary reason for grounding is safety Conformance to the applicable requirements of the authorities having jurisdiction is of course mandatory However grounding also has an impact on electromagnetic compatibility From the EMC point of view it is desirable to have a low impedance ground network as a current flowing in the ground network will then produce low voltage in the network A low impedance network can be obtained using a multipoint ground scheme with as many closed ground loops as is economically possible Fuse The fuse provided in the unit will not blow during normal operation If the fuse blows the TDcontroller has malfunctioned This fuse must only be changed by NEXO certified service personnel In any case do not replace the fuse with a non certified NEXO fuse as this will invalidate the NEXO warranty CAUTION This servicing instruction is for use by qualified service personnel only To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 9 ENKI TD CONTROLLER SETTING UP ADVICE ENGLISH Recommendations for wiring the sense lines The impedance of the sense inputs of the TDcontroller are high so currents are low and therefore light duty cable can be used If the TDcontroller is housed i
54. or each channel See in Amplifiers Gain Power page 25 a complete description of this menu and the way to adjust this setting 2 7 AMP POWER Allows you to enter a Nominal Amp RMS power into 8ohms Adjustable from 200 Watts to 5000 Watts in 50W steps for each channel See in Amplifiers Gain Power page 25 a complete description of this menu and the way to adjust this setting 2 8 Reset measure amp Sense Alert The first section of Menu 2 8 allows you to reset the gain and power reading to default settings If the ENTER Y button is pressed the values are reset and menu 2 6 is displayed again Use this feature if any physical changes have occurred in your system to start again the measurement process Turn the encoder wheel to reach the second section of Menu 2 8 which is the alert disable menu Press the enter lt gt button to set the alerts Led flashing on or off Once disabled the LEDs will not flash if gain settings are incorrect This parameter is saved every time the NX242 returns to the default screen or when a setup is saved in the menu 1 5 3 1 System Config Changing a set of parameters within the same family is made immediately and is barely audible USER MANUAL LOAD2 22 DATE 03 12 2004 ane PAGE 24 TD CONTROLLER MENU DESCRIPTION ENGLISH Input Patch MENU3 2 Each output or group of outputs when a system uses more CEE 747 than one output per cabinet
55. patible with the both the NX241 and NX242 TDcontrollers For advanced set ups and signal processing NEXO has released the NXtension Expander Board which has double the available DSP resources MENUS and functions remain the same no learning curve is needed to go from the NX241 to the NX242 The same LOAD and NXWIN software is used to update both TDcontrollers The transition is transparent for the user Note however that the NX242 can t be flashed with LOADs prior to 2 21 The appearance of the NX242 is identical to the NX241 except the model number Therefore you can mix both units in the same rack without aesthetic problems Please note however that both NX241 and NX242 should have the same firmware revision LOAD to be phase compatible What s changed The overall performance of the NX242 has improved significantly 10dB more on the dynamic range less distortion The layout and ground scheme of the unit have been totally revised to cope with the most demanding situations founded in the field low and very high frequencies The EMC protection on every input output and the new ground structure makes the NX242 immune to interference far beyond the recommended values founded in EMC standards As a result there is no need for the earth lift function found on the NX241 The input stage is truly floating and accepts important common mode offset resulting from very long wiring or difference of ground potential between two connected equipm
56. r Board Please refer to the separate manual for additional information NX242 USER MANUAL LOAD2 22 DATE 12 3 2004 PAGE 13 ENKI TD CONTROLLER BLOCK DIAGRAM DESCRIPTION ENGLISH Block diagram description Equalisation amp Filtering The number between parenthesis refers to the number circled in the block diagram Subsonic and VHF filtering 1 Low and high pass filters are used to filter out frequency components that could possibly degrade the performance of the TDcontroller and amplifiers The filters are optimised to work in conjunction with overall system response The high pass filters are also extremely important as they optimise excursion at very low frequency which is a very important safety factor Therefore do not use set ups which are not designed for the cabinet you are using Equalising wideband acoustical response 2 This wideband equaliser section achieves the correction required to obtain a flat system response as the cabinets are acoustically designed for maximum efficiency on the whole frequency range Active rather than passive attenuation allows the lowering of amplifier voltages for a given output SPL and therefore increases the maximum SPL achievable with the same amplifier Active equalisation also extends system bandpass especially at low frequencies where acoustical performance is limited by cabinet size Equalising single component response 3 This equaliser set allows acting on a
57. sense error alerts soro 2 ww D did E LCD contrast adjustment O eo Input Overload DSP Clip Heavy Duty Balanced Output Stage High end DA 24bit convertion Delivers up to 28dBu into 6000hm load BALANCED OUTPUTS Rotary Encoder Enter Button nin us S Serial Connection RS232 to PC ES Qo in Connect your NX242 to the COM port of your PC to update the NX242 Firmware e a e EE e e Y Sense Line Connector to amplifier s A CS Allows the best use of the protection process including the amplifier analysis gain and o eo clipping voltage Failing to connect the sense connector may damage your speakers LLL i LCD screen is plug must be maintained CAUTION To reduce the risk of electric schock grounding of the center pin of thi Q Menu Selection Sub Menu B Selection Main Menu A Selection 115 230V 50 60Hz 45W NX242 Switch mode power supply Detachable Power cord shall comply with your country regulation Allows continuous operation between 90V and 260V No Adjustment required ON OFF Mains Switch Wie e ul e USER MANUAL LOAD2 22 DATE 03 12 2004 ENGLISH PAGE 12 TD CONTROLLER GENERAL DESCRIPTION GENERAL DESCRIPTION Global architecture Global architecture is based upon a full 24bit audio path with 48bit core calculator running at 100 Million In
58. structions per Second Featuring m 2analogue inputs floating balanced 24bit resolution ADC m 4 analogue outputs balanced 24bit resolution DAC m 4 sense inputs balanced 16bit resolution ADC Set up configurations The audio path is automatically adjusted within the NX242 according to the setups PS15 GEOT CD18 chosen by the user This will affect the delays and gain control For instance changing the gain of a CD18 cabinet will affect two channels at a time changing the gain on a 3 WAY cabinet e g Alpha will affect three channels etc At the time of writing the following configurations are used for a complete description Appendix A on page 37 for the list of setups currently supported unused unused 2 WAY Passive Cabinet 2 WAY Passive Cabinet Channel 2 duplicated Sub 2 WAY Passive Cabinet 2 WAY Passive Cabinet Sub Sub 2 WAY Passive Cabinet 2 WAY Passive Cabinet 1WAY Active cabinet 1WAY Active cabinet 1WAY Active cabinet 1WAY Active cabinet unused 1WAY Active cabinet 1WAY Active cabinet 1WAY Active cabinet Cardioid back Cardioid front Active cabinet unused Cardioid back Cardioid front Active cabinet Channel 2 duplicated Cardioid Sub 1 back Cardioid Sub 1 front Cardioid Sub 2 back Cardioid Sub 2 front You may have noticed that certain configuration 4 passive cabinets for instance are not supported Using those configurations requires the addition of the optional NXtension Expande
59. t the end of the day if you have not measured both outputs in the actual configuration you can be 9096 sure that you won t get the correct phase alignment that you would have had if the NX242 was fed by a single source Consequences of badly aligned systems Mis aligned system have less efficiency i e for the same SPL you will be obliged to drive the system harder causing displacement amp temperature protection at lower SPL than a properly aligned system The sound quality will decrease The reliability will decrease as the system is driven harder to achieve the same levels In certain situations you may even need more speakers to do the same job Consider the simple example of the AUX signal passing through a digital device without processing that is adding a delay of 2ms due to its conversion time The AUX is then sent to a CD12 subbass while the MAIN is send to the S850 rig The first graph display the phase around the crossover point 85Hz in this case USER MANUAL LOAD2 22 DATE 03 12 2004 PAGE 36 TD CONTROLLER APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND ENGLISH The two overlapping phases are those of the CD12 and S805 as they should be The green curve is the same as the blue one with a 2ms delay Sound Pressure dB 20 System in Phase 2ms delay on Sub 90 0 Sub Phase System Phase Sub Phase delayed 2ms 489 90
60. tronically balanced and floating 20kOhm CMMR 80cB Two XLR 3 connectors 4 Amplifier Sense Inputs LF mono MF HF L amp R Floating 150 k 18 bit converters 8 Pole Removable Strip Terminal 4 Audio Outputs 24 bit converters Electronically balanced 50 Ohms 4 XLR 3M connectors 24 bit data with 48 bit accumulator 100MIPS Optional NXtension Expander Board 100MIPS Menu A and Menu B buttons 16 characters by 2 lines display Select Wheel amp Enter button 4 IN Clip DSP Clip red LED s Speaker Protection yellow LED for each channel Individual Mute Solo buttons and red LED for each channel Amp Sense amp Peak green amp red LED s for each channel On Off Mains switch mains IEC socket RS232 serial communications connector Expansion slot for processor extension card Upgrade for software improvement new cabinet set ups available on NEXO web site www nexo fr 1U 19 Rack 230 mm 9 Depth 3 8kg 8 8lbs net Allows control from all NEXO ranges Within the selected range allows the cabinet to be set for passive or active mode aux mono or stereo subs wedge or FOH operations depending on system selected Up to 80 factory pre sets Peak Limiter Displacement and Temperature protection on every channel Physio control of the Protection limiter amp compressors Soft Clip Automatic tracking of amplifier clip point Up to 150m 465 ft of delay in 10cm 4in steps on Sub channel Main channels or Sub Mai
61. tware loaded in your NX242 is not LOAD 2 22 Keep in mind that you should hold the A amp B buttons down when resetting the NX242 to switch from one family of setups to the other CD18 CD18 SUPERCARDIO CD18 bac CD18 4 front CD18 2 bac CD18 2 front Crossover 75HZ CD18 SUPERCARDIO CD18 4 bac CD18 4 front CD18 2 bac CD18 2 front Crossover 100Hz CD18 CARDIO CD18 bac CD18 4 front CD18 2 bac CD18 2 front Crossover 75HZ CD18 CARDIO CD18 4 bac CD18 4 front CD18 2 bac CD18 2 front Crossover 100Hz CD12 2xCD12 Flown CD12 4 back CD12 front CD12 2 bac CD12 2 front STEREO 1 2 3 4 2xCD12 Ground CD12 back CD12 front CD12 2 bac CD12 2 front STEREO 1 2 3 4 4 S2 cabinets S241 S2 2 S2 3 S2 4 S2 63 Hz 4 S2 cabinets S2 1 S2 2 S2 3 S2 4 S2 80 Hz AlphaE stereo AlphaE Stereo B1 18 Left B1 18 Right AEM Left AEM Right AEM B1 18 AlphaE Stereo X B1 18 Left B1 18 Right AEM Left AEM Right AEM Bl 18xover AlphaE Mono ALPHAE Mono 62 B1 18 AEM AEM B1 18 S2 63 ALPHAE Mono S2 B1 18 AEM 7 AEM B1 18 S2 80 AlphaE Active ALPHAE ACTIVE 3W be B1 18 AEM MF AEM HF B1 18 MF HF ALPHAE ACTIVE AN S2 B1 18 AEM MF AEM HF S2 B1 18 MF HF ALPHATD B1 M3 B1 15 A MF A HF No SubTD ALPHATD S2 B1 M3 S2 B1 15 A MF A HF SubTD S2 63 Hz ALPHATD S2 B1 M3 S2 B1 15 A MF A HF SubTD S2 80 Hz USER MANUAL LOAD2_2

NX242 Digital TDcontroller

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