NX242 Digital TDcontroller - Nexo

More documents

Recommendations

Info

3ENGLISHPAGE 14BLOCK DIAGRAM DESCRIPTIONINPUT RINPUT LSENSE 1SENSE 2SENSE 3SENSE 4A/D EQ SHELVINGRNX242 Digital TDcontroller BLOCK DIAGRAMHEADROOMINPUT VU-METER2A/D EQ5SHELVINGR+LAnalogue pathDigital AudioDigital servo & protectionsINPUT VU-METERCommandFALLBACKSignal8RAMP POWERdisplacementEQ VCAA/D AMP VOLTAGE AMP GAINEQMUTE DACR+LDisp.DISPLACEMENT 19CommandVoice Coil Temp.ChassisTemp.LF TEMPERATURECommandHF TEMPERATURECommandVoice Coil Temp.ChassisTemp CommandPHYSIO 1ATT/REL.PATCHDELAY 1164 3 3 47 7OUTPUTCHANNEL 4PEAK SIMULATIONDISPLACEMENT 2CommandFALLBACK SignalR 1AMP POWERdisplacementEQ VCAA/D AMP VOLTAGE AMP GAINEQMUTE DACR+L 1ATT/REL.1DELAY 2CommandDisp.Voice Coil Temp. Voice Coil Temp.L 1ChassisTemp CommandPATCH 2ChassisTemp.LF TEMPERATURE 2PHYSIO 2OUTPUTCHANNEL 3CommandHF TEMPERATURE 2CommandPEAK SIMULATION 2A/DFALLBACKSignalAMP POWERAMP VOLTAGE AMP GAINDisp.DISPLACEMENT 3CommanddisplacementCommandVoice Coil Temp.ChassisTemp.LF TEMPERATURE 3Voice Coil Temp.ChassisTemp CommandPHYSIO 3ATT/REL.2RR+LPATCH 3DELAY 3EQVCAEQMUTEDACOUTPUTCHANNEL 2CommandHF TEMPERATURE 3CommandPEAK SIMULATION 3DISPLACEMENT 4CommandFALLBACK SignalRAMP POWERdisplacementEQ VCAA/D AMP VOLTAGE AMP GAINEQMUTE DACR+LATT/REL.3DELAY 4CommandDisp.Voice Coil Temp. Voice Coil Temp.ChassisTemp CommandPATCH 4ChassisTemp.LF TEMPERATURE 4PHYSIO 4OUTPUT CHANNEL 1CommandHF TEMPERATURE 4CommandPEAK SIMULATION 478650012L132L1132L32132LHEADROOM12910 1113NX242 USER MANUAL LOAD2_22DATE : 12/3/2004
ProtectionBLOCK DIAGRAM DESCRIPTIONPAGE 15ENGLISHVCAs (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 ouranalogue circuitry). These VCA's are embedded into complex composite structures in order to changetheir basic operation into frequency selective attenuation. This operation is similar to that of a voltagecontrolled dynamic equaliser (VCEQ).Each VCEQ and VCA is controlled by the synthesis of several signals issued from the various detectionsections. That synthesis is in fact the envelope of those signals, with an optimised release and attacktime 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 isproportional to the voice coil excursion. This signal, after rectification, is compared to a preset thresholdmatching 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 asan instantaneous limiter (very short attack time) to prevent displacement from overriding the maximumpermissible value.Temperature control (9)Each sense signal is fed into a shaping filter (one per transducer), each one producing a signalproportional 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 ofthe voice coil and chassis, producing a voltage, which is representative of the instantaneous temperatureof the voice coil.When this voltage reaches the threshold value corresponding to the maximum safe operationtemperature, the VCA becomes active to reduce the Audio signal level and limit the effective temperatureto fall under the maximum usable value.In order to avoid detrimental effects induced by very long release time constants coming from thetemperature detection signal (level being reduced for an extended period, « pumping » effects...), thedetection signal is modulated by another voltage integrated with faster time constants matching thesound level subjective perception. This allows the controller to reduce the effective operation duration ofthe temperature limiter and make it sound more natural, while the efficiency of protection is fullypreserved 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 longattack time constant. By anticipating the operation of the temperature limiter, it prevents a high levelAudio signal appearing suddenly then being kept up for a period, which is long enough to trigger thetemperature limiter. Without this, a rough and delayed gain variation would result which would be quitenoticeable and unnatural.USER MANUAL LOAD2_22DATE: 03/12/2004
Page 1 and 2: NX242 Digital TDcontrollerUser Manu
Page 3 and 4: Déclaration de conformitéINSTRUCT
Page 5 and 6: INSTRUCTIONS DE SECURITE IMPORTANTE
Page 7 and 8: QUICK STARTPAGE 7ENGLISHQuick Start
Page 9 and 10: SETTING-UP ADVICERecommendations fo
Page 11 and 12: SETTING-UP ADVICEPAGE 11ENGLISHGeoT
Page 13: BLOCK DIAGRAM DESCRIPTIONPAGE 13ENG
Page 17 and 18: User set-up delayBLOCK DIAGRAM DESC
Page 20 and 21: ENGLISHPAGE 20MENU DESCRIPTIONThe i
Page 22 and 23: ENGLISHPAGE 22System settingsMENU D
Page 24: ENGLISHPAGE 24MENU DESCRIPTIONInput
Page 28 and 29: ENGLISHPAGE 28Gain valueAMPLIFIERS
Page 31 and 32: INSTALLATION RECOMMENDATIONSPAGE 31
Page 33 and 34: NEXO WINDOWS LOADERExecute the foll
Page 35 and 36: APPLICATION NOTE : DRIVING THE SUB
Page 37 and 38: APPENDIX A : LIST OF SUPPORTED PRES
Page 39 and 40: APPENDIX A : LIST OF SUPPORTED PRES
Page 41: APPENDIX A : LIST OF SUPPORTED PRES
Page 44 and 45: PAGE 44CONSEILS DE CONFIGURATIONFRE
Page 46 and 47: PAGE 46CONSEILS DE CONFIGURATIONFRE
Page 48 and 49: PAGE 48DESCRIPTION GENERALEFRENCHDE
Page 50 and 51: PAGE 50DESCRIPTION FONCTIONNELLEINP
Page 52 and 53: PAGE 52DESCRIPTION FONCTIONNELLEFRE
Page 54 and 55: PAGE 54DESCRIPTION FONCTIONNELLEFon
Page 56 and 57: PAGE 56DESCRIPTION DU MENUFRENCHUn
Page 58 and 59: PAGE 58DESCRIPTION DU MENUFRENCH1.6
Page 60 and 61: PAGE 60DESCRIPTION DU MENUFRENCHinh
Page 62 and 63: PAGE 62AMPLIFICATEURS (GAIN, PUISSA
Page 64 and 65:
PAGE 64AMPLIFICATEURS (GAIN, PUISSA
Page 67 and 68:
RECOMMANDATIONS D’INSTALLATIONPAG
Page 69 and 70:
LOGICIEL DE MISE À JOURPAGE 69Exé
Page 71 and 72:
NOTICE D’APPLICATION: ALIMENTATIO
Page 73 and 74:
ANNEXE A : LISTE DES PRÉRÉGLAGES
Page 75 and 76:
ANNEXE A : LISTE DES PRÉRÉGLAGES
show all

NX242 Digital TDcontroller - Nexo

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?