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DCM Series - QSC Service

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3. 1 If no sound in the theater 1 Monitor the PROC position to verify proper sound input to the DCM 2 Check sound in AMP position 3 If no sound check that the amplifiers are on and the volume is up 4 verify no Load Fault indication If there is a fault indication press and hold the Diagnostics button and an LED will light above a channel indicator L LC C RC R SL SR SUB The channel indi cated has a cable or speaker problem Use standard audio troubleshooting techniques to isolate which of these is at fault 5 If there is no Load Faultindication switch the Bypass switch to the Emergency position and verify that proper center channel audio is present We now know that the cables amplifier and speaker for the center channel are okay If you switch this back and still have no sound check the DCM configuration file using the DCM Commander software 2 If one audio channel is missing Connect with the DCM Commander software and upload the DCM configuration into your PC See if the Crossover Mute Settings screen shows any channels muted If not verify that the amplifier for that channel is on and the volume is up Reseat the cable for that channel and replace it with another if needed 3 If theater audio is distorted Verify that the DCM Input Clip LED is not flashing If itis the cinema processor output signal needs to be turned down If itisn t see if any amplifier clipping lights are flashing If they are then
4. SL2 and SR2 in the next set of speakers further away from the screen and the SL3 SR3 connections furthest back in the theater In Surround Decoder applications the SL3 SR3 12 13 setting monitors the speakers on the backwall Other installations might require speaker sets where some speakers are along the theater side walls where other speakers are under a balcony overhang By connecting these speakers as zo nes the sound levels will be much easier to balance Any of these amplifier outputs can be verified by selecting them to be routed to the DCM monitor Speaker The DCM also has 4 Subwoofer outputs Each of these outputs can be individually selected for monitoring on the front panel speaker The front panel monitoring logic allows combining amplifier channels to verify individual signals or combinations of signals NOTE All combining of the individual frequency outputs 2 way or 3 way is done automatically so all front panel monitoring is of a full frequency signal 3 Diagnostics Indicators The Diagnostics Indicator section includes an extremely simple method of verifying proper sys tem operation and performing basic troubleshooting The Power indicator indicates whether the DCM unit is on or off The Input Clip indicator is helpful in verifying that the cinema format processor is not over driving the DCM input circuitry The Load Faultindicator is a unique and powerful feature which verifies that signal inp
5. 3 supports a Sony 8 ch 2 way or 3 way system These systems include many outputs which are paralled to allow for maximum theater con nection flexibility Notice that the DCM series takes advantage of the DCA amplifier DataPorts to allow extremely easy and reliable connection to all of the amplifiers with all inputs and monitoring signals being connected by one low cost mass termination cable This cabling system allows a QSC cinema equipment rack to be wired up much faster than traditional XLR or barrier strip termination products Another critical feature is the ability to download standard or custom configuration adjustments via the se rial port For example in a 15 theater megaplex with similar rooms and equipment an installation techni cian can calibrate a DCM unit to the appropriate speakers and room configuration ONE TIME and then load these settings into the other 14 DCM units and be finished Weare extremely proud of many of the ground breaking features contained within these products Thank you for your interest Ill SYSTEM REQUIREMENTS DCM Commander software is designed to control only one DCM hardware unit at a time In order to test the functionality of this software together with the DCM hardware unit you must have at least the following A QSC DCM Digital Cinema M onitor unit The DCM Commander software diskettes or CDROM An IBM compatible PC with at least a 486 or equiv processor Windo
6. 46db compared to L amp R This is usually connected to a special cine ma system which supplies headphones to people with hearing difficulties This can also be used as an input signal to a powered speaker for remote monitoring of basic L C R signals in larger projection booths On the DCM 2 and 3 one connection on the terminal strip labelled EX allows a remote on off signal to come from an external surround decoder This routes the surround signals 1 0 to the TO SURROUND EX DECODER connector or directly to the DCM DataPort connections 7 Power Input The power connector uses a standard IEC power cable Since the DCM series uses a switching power supply a wide range of AC power can be accepted without affecting system performance Please refer to the specifications in Appendix 3 for the input voltage range and tolerance Refer to the back panel labeling for proper fuse ratings 16 VII DCM WINDOWS SOFTWARE 17 A System Control Overview To access the powerful crossover and system calibration functions contained within the DCM hard ware one must use the DCM Commander W indows control software which communicates via an RS 232 serial port A typical cinema installation should require this setup procedure ONLY during the initial installation of the system One particular advantage of this remote programming methodology is the ability to cali brate one DCM unit and easily dow nload ALL of these settings to any number of additional
7. 6 Password Security nas A e id hs 5 7 Emergency Bypass uses dde nda eee A Mn ac ee 6 8 Surround Insert Connections Dolby A 10 6 9 Active Surround Ready oed ent ale et Ope a e t eta b a ORA 6 Front and Rear Panel Drawings 7 IV DCM Hardware Description 12 A Brontoarie FSU ecd ea rendra UG blend iris 12 T POWOPODOTI SRE sedato err Nepote cU Esp Bas us 12 2 Audio MONA asd eicere ORAE CREUSE UO E 12 Diagnostics ETICO rat tabo hti Qd tab ee el etilo dues 13 d Test de ks orc cua va dic gloat va a RE ER E CE ER ERE en t 14 S Emergency BYPASS ii aureus coco Amir c OP heo ea Ob teks 14 B Rear Panel Features dana vasta alus ete d b apt tl tede ito 14 FAMmplifi r Data ports ceat i AR sci a Gera in 15 2 ROMP A e dco in met etse aud T 14 dc 55222 CORTIBEHOTI Lrs nocet ode Maiden wed dated bin noob regente 15 ASUME seen dE OR Fc sands dp Rt dude 15 5 Emergency Bypass Levels cig tit sb p eicere EU kind 15 6 Terminal Strip Connections gt cess eec rr RR ne Re Eh 16 Fe PONT NIUE tiana eo Boxe iie dad et Aleit n lec A te A 16 V DCM Commander Windows PC Software 17 A System Control Overview ovde ide etos ir as amant te ds Sow t s 17 B Software Installation 17 Ca StartingeT he Programi a
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9. from analog to digital and back again which is designed to minimize all background noise and react to the dynamic range of any film track In other words the quality of the DCM signal path is better than any state of the art cinema format available 4 Speaker Database preprogrammed settings QSC has worked with the leading suppliers of theater speakers to obtain the optimum settings for the most common theater speaker models This database is easily loaded into the DCM hardware unit and the DCM Commander software offers features to organize store and edit these settings This feature guarantees that your installation starts with technically optimized settings before you begin adjusting for room characteristics 5 Fault Analysis All signals from the film sound processor are compared with the signals that are at the output of the amplifier to verify that sound has made it completely through the system Each amplifier out put channel has sensors which measure both the voltage and the current to verify proper opera tion For example if there is signal at the DCM unit input but there is no signal at the output of the amplifier then the fault indicator will light Or if an amplifier output cable is shorted or open the fault indicator will light Pressing the Diagnostics button will indicate which channel has this fault condition 6 Password Security The crossover settings that you create can make a dramatic difference in the sound qual
10. level through the device full signal input and the fault condition must exist for several minutes before the front panel Load Fault LED will light This extra fault verification time eliminates false triggering which would be confusing to a user In conclusion J ust shorting the output terminals will NOT cause the fault LED to light the unit must be driven by real world input signals and the fault must persist for several minutes 4 Test acks The Test jacks give you access to any of the signals being sent to the front panel speaker before the gain potentiometer These signal levels are at the exact same level as the cinema processor output signals unity gain and can be used as a test point for system calibration 5 Emergency Bypass This is an extremely powerful feature If there should ever be a problem with the DCM or system cabling you have the ability to bypass all of the DCM active circuitry and get sound to the center channel In the NORMAL position the DCM performs normal monitor and crossover functions In the EM ERGENCY position the PROC center channel signal is routed to a passive crossover no power is required and then to the center channel amplifier In the EM ERGENCY position all amplifiers except the center channel amplifier are put in Standby mode There are level adjustments on the rear panel for balancing the high frequency and low frequency output level B Rear Panel Features The DCM uses mass terminat
11. the DCM 2 amp DCM 3 are Active Surround Ready Contact QSC if you need this feature 28 Screen DSP Settings j Screen Settings Input Settings Band Settings DEL HPF HEQ PEQ SEQ GAIN POL MUT what sh ch NES IET BERE RE uo HPF DEL Bat delas Mag GAIN POL MUT LI ai lh pit pid pedi LPF GAIN POL MUT CENTER b Screen Settings These screens allow full control of all the crossover parameters within the DCM hard ware REMEMBER All parameter changes become active within the DCM only after selecting Communications Write Configuration to DCM Screen DSP Settings Screen Signal Path Screen Setting Input Settings Band Settings g f Driver Delay CD Hom EG Frequency HE Hz Delay Time us Q Factor f C over 24dB oct Screen EQ HPF Frequency 0 Hz Channel Delay Delay Time g mS A B LS C Speaker Model DEFAULT DBF Gain D dB EAW CB152 j Bal Use Speaker Settings Customize 29 If you selected a speaker model under the Configuration Speaker Configuration window the Use Speaker Settings button will be selected and the speaker model name will appear in the Speaker M odel text area If you select Customize all parameters are able to be modified If you create a set of parameters which you would like to save for later reference either select File Save As to save all settings as a Configuration or select the Save to Speaker Databa
12. ATION 35 A System Hardware Connections Installation of a DCM hardware unit is extremely simple The most important task is to make sure that you have all of the correct cables Since mass termination connectors are used wherever possible a typical system can be wired in minutes 1 Required Cables A typical system needs the following cables One IEC Power Cord A 15 pinto 15 pin DataPort Cable for every amplifier DCM 1 max 8 DCM 2 max 11 DCM 3 max 15 One 25 pin to 25 pin Cinema Processor cable One 9 pin RS 232 cable used only by the installer during setup One 9 pin Surround Decoder cable if this option is being used 2 Power Connections The power cable uses a standard IEC power cable To reduce the risk of accidental disconnect cable tie all of the power cords in the equipment rack together in such a way that cable movement is minimized The DCM power supply is a switch mode type and will accept a very wide range of input voltages Refer to the Appendix 2 for details 3 Control Computer Connection This connection is ONLY used to connect to a PC computer during setup or system troubleshooting 4 DataPort Connection QSC DataPorts contain all input cabling speaker monitor connections remote on standby control and more For example 225 connections are made between the DCM 3 and the DCA amplifiers 15 DataPorts in just a few minutes Follow the back panel labeling which shows which DataPort connec
13. CM power on off also switches the QSC amplifiers between on standby except the center channel amplifier connected to DCM DataPort B which remains on 2 Audio M onitoring All of the processor and amplifier audio signals can be routed to a monitor speaker on the front panel so one can verify proper operation The PROC AMP button selects monitoring of the cinema processor or amplifier output signals PROC is short for PROCESSOR and routes the signals that are coming from the cinema processor at the DCM input to the front panel speaker The AMP selection monitors the signals from the output of the QSC amplifiers right from the speaker output terminals After the AMPS PROC choice has been made the individual channel buttons determine exactly which signals are routed to the front panel monitor speaker Processor monitoring is very simple Select the PROC position and then select the desired L LC C RC R SL SR or SUB position Amplifier monitoring includes selections for the L LC C RC R channels just like the PROC selec tions but offers additional monitoring of all of the additional amplifier outputs There are physically 3 Surround Left SL and Surround Right SR amplifiers available for connec tion to the speakers on the theater side walls These are able to create three distinct zones where volume controls can be adjusted One typical installation would be to connect the SL1 and SRI signals to the speakers closest to the screen
14. DCM 2 and DCM 3 units are prepared for the addition of circuitry that allows crossover and equalization of the surround channels Please contact the QSC factory if you have an application which requires this function uio Apun JOMwOd JO sso D SI SISUL sI Sjulod sa oi indul J JO NDA SUL UM uuergod boruuoer D SI SISUL J AON3OXI3IA3 OI YOJMS slut di Jeyiduuo jeuubuo JEUSI SUL OL SIPUBIS MOI PUD yy SOSA U9IUM IGAOSSOJO AISSOd D al indui ojpno suubyo J9 U9I SUL sj2euuoo UOIMS ssodAg Sul Oulpee si UOIUM SUBIS OlpnDb SUL O j2euuoo OL NOA MOIID SSSUL 4exyoeds jeuobd juo Sul buueulo INOA JO nano NOA Y 446l M diro indu susddou SIY JI 10SSS8901d SUOLING 1019818 S SUUDYO SUL 180 JUBI Im aydur uuejgoud sul 10 JUBI SUL puo uoung SONSOUBMDIA SUL SS ld SUOODSUUOI 1exyoeds INOA JO AUD uo uedo JO poys O SOINSOSLU NOA Sut 4 siuOl moy poo Sul uwop UNI NOA y Jo ANOO indul eui BUIAUPISAO 810 AINISYINI t 110v3 avo awaone 4119 LNANI O 43H04 SSVdAd S3JILSONOVIG OOO 1e Joe O sdnvo Je 3JWNTOA YOLINOW jsnfpo euunjo 1exyoeds eurod juo Y uu yuouu pup Bulsseooid DY PUD 21 SADU IAOG PUD Z WOd AUO 31ON uouoedo ASA OL Al onpiAipul pej2ejes eq OSID UD snadno Jejoomans pup punouns ejdiunuJ sy webads auod zuo SUL uo IOJUOUUI OL All DINOM NOA SIDUBIS YOIUM euluuejep OL noA MOJO SUOLING JOLDO DS MOLINOW VIH3NIO TYLISIG DCM Front Panel
15. DCM units that are similarly equipped To aid in calibrating the crossover settings the DCM Commander control software includes files for many well known cinema speakers These files will automatically set the DSP filters and transducer alignment delay settings within the DCM hardware according to the settings recommended by the speaker manufacturer for optimum sound performance Select these speaker files for each of the physical locations L C R SL SR SUB and a large portion of the system calibration is finished NOTE QSC will be updating these files regularly as new models are introduced from speaker manufacturers or settings are improved B Software Installation Place the DCM Commander diskette marked DISK 1 of 2 in your computer disk drive Select Start Run and type in A setup exe and click on OK Follow the instructions when DISK 2 of 2 needs to be inserted NOTE If a CDROM version is supplied merely select the correct drive letter and double click on setup exe C Starting The Program Select Start Programs QSC DCM DCM Commander This will cause the program header with version number to appear D Working with Configuration Files 1 Your first Configuration file A Configuration is the complete set of parameter settings which change the audio routing cros sover filters gains delay diagnostics and monitor behavior within the DCM hardware unit If you have just received your DCM hardware unit and DCM Com
16. FT foca 1824 va CENTER DC4 1824 y B suB1 2 oca 1824 le RIGHT DCA 1824 v c sumsiwfoca1824 Ya sur oca 1824 y m sur2 0ca 1824 b Speaker Models A very powerful feature of the DCM series is the ability to load factory supplied cros sover settings files for popular cinema speakers Simply select the type of speaker be ing used in your installation from the QSC supplied speaker database and all crossover filter gain transducer delay and impedence settings will be loaded into the Cros sover DSP settings screen These can be modified by using the Customize command Note this DOES NOT include any channel delay or screen EQ as these are not charac teristics of the speaker Select Communications W rite Configuration to DCM to download and activate these settings within the DCM 2 or DCM 3 hardware unit NOTE Speakers called GENERIC SUB and GENERIC SURROUND set default speaker impedences ONLY Goto the DSP SETTINGS window to set the SUB filter parameters 24 Amp amp Speaker Configuration Amplifier Models Speaker Models Speaker Arrangement Impedance Limits ls Surround Ch Is L EAW CB152 DEFAULT DBF q SUR A CUSTOM Kg pey custom Kd sur 2 y EAW CB152 DEFAULT DBF suns cusTom gg Rie CUSTOM El Subwoofer Channels R EAW CB152 DEFAULT DBF 4 suBs CUSTOM 25 c Speaker Arrangement In order to do proper Load Fault monitoring the DCM
17. Innern Wartung nur durch qualifiertes Wartungspersonal WARNUNG Zur vermeidung von Feuer oder elektrischen Schl gen das Ger t nicht mit Regen oder Feuchtigkeit in Ber hrung bringen SAFEGUARDS Electrical energy can perform many useful functions This unit has been engineered and manufactured to assure your personal safety Improper use can result in potential electrical shock or fire hazards In order notto defeat the safeguards observe the following instruc tions for its installation use and servicing PRECAUTIONS L nergie lectrique peut remplir de nombreuses fonctions utiles Cet appariel a t concu et r alis pour assurer une s curit personnelle enti re Une utilisation impropre peut entrainer des risques d lectrocution ou d incendie Dans le but de ne pas rendre inutiles les mesures de s curit bien observer les instructions suivantes pour l installation l utilisation et l entretien de l appareil Introduction ree t bens 1 Il System Requirements 2 IIl Package Contents oio so ro e ORE ES 3 IIl System Concepts LL roi e tl e t t Ua f GERM te 4 A System Design AAA wa 4 1 QSC Amplifier Dataports spatial cade 4 2 Programmable routing and crossover settings 5 2 DS P DIDCRSSITIO zd dct ure Dc CREAR c E RC QAO 5 lA tue etd het stt e d tco rabia 5 DFA IA Le apte eI Cote pip Sn eo e E d Rate ane 5
18. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Shielded cables must be used with this unit to ensure compliance with the Class A FCC limits This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil numerique de la classe A respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada EXPLANATION OF GRAPHICAL SYMBOLS The lightning flash with arrowhead sym bol within an equilateral triangle is in tended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may he of sufficient magnitude to constitute a risk of electric shock to humans The exclamation point within an equilat eral triangle is intended to alert the users to the presence of important oper ating and maintenance servicing in structions in the literature accompany ing the product EXPLICATION DES SYMBOLES GRAPHIQUES Le symbole clair avec point de fl che l intr rieur d un triangle quilat ral est utilis pour alerter l utilisateur de la pres ence l int rieur du coffret de voltage dangereux non isol d ampleur suffisante pour constituer un risque d el trocution P Le point d exclamation l int rieur d un triangle quilat ral est employ pour alerter les util
19. QSC DCM Series Digital Cinema Monitor amp Crossover System USER MANUAL The DCM hardware unit and DCM Commander software are the property of QSC Audio Inc Information in this document is subject to change without notice and does not represent a commitment on the part of QSC Audio The software described here is furnished under a licensing agreement It is against the law to copy the software on any medium except as specifically allowed in the licensing agreement DCM Commander is a trademark of QSC Audio Products Inc Windows and Windows 95 are trademarks of Microsoft Corporation IBM is a registered trademark of IBM Corporation Pentium is a registered trade mark of Intel Corporation 1999 QSC Audio Inc All rights reserved Printed in USA Document Number 600019 A P WARNING NOTICES WARNING Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment NOTE This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications
20. R P DI MPO Ee RUPEM T 37 3 Monitoring audio mix adjustments 37 C System Calibration advanced neat suena a C P E OY Cel b CORPORA 37 1 Speaker Frequency Adjustments 37 2 Setting Delay TIMES manie veg Teide terii o ecd tess 37 D System Installation Troubleshooting 39 1 If no sound in the Theater cis ab CE a Ge a 39 2 If one audio channel is MISSING sen unie et p erac 39 3 If theater audio is distorted 39 4 If switching to bypass does not restore sound 39 Appendix 1 Cable Details Pinouts 41 Appendix 2 DCM SpecifiCatlof s HS nee ER Ox X ta nt PIE uc Ete en 45 Appendix 3 Address amp Telephone Information sss 4 Il INTRODUCTION The QSC Audio DC series together with OSC DCA amplifiers is designed to perform all of the electronic functions required for the audio portion of a cinema playback system except for the cinema processor unit for example Dolby Sony or dts and the speakers The DCM series consists of one of three hardware units DCM 1 DCM 2 and DCM 3 and the PC based control software called the DCM Commander The DCM 1 supports a typical Dolby 6 ch 2 way system The DCM 2 supports a typical Dolby 6 ch 2 way or 3 way system and the DCM
21. a Vac ex Peace saa nan 28 a Screen Signal Path 28 b Screen Settings cocco uo da O 29 ES AD A ot Ade rud to 30 asus igna Pathi o sot ccr eo ta bebe AAA 30 De SUD eS GEOTIGS ere std c atts Rd et edo Ne 31 IMA So put tl Aa rt er sind ena 32 Soele pretn tex ye M doctore CO eb ede iR e RR ae RUPEM ROI 33 A nn ne pco et din fie teca n tis 33 Ie MA Ia 33 F DCM 1st Time Troubleshooting ue cedet PP EVE SOR apte ex td ee 34 1 No PC to DCM 1 Communications dada 34 2 No audio from front panel monitor speaker 34 3 Some front panel LEDs don t light 34 VI System Installation E S 35 A System Hardware Connections 35 1 Required Cables Overview SE nn pe pb pe ead 35 2 Power COMEN ed sr Mand 35 3 Control Computer Connection ia a ee EN PE EP HE DRE FADE AE 35 IDAS PONE CONMOCHONS irritan atic daten t ea bd oe hib ES 35 By PROCESSOR CONNECTION Eur Diet t Da a due i ode C dad 35 6 Hearing Impaired Connection 36 7 Powered Subwoofer Connection sd nee i ha 36 8 Surround Insert Connection d ca daras cei ere Ub oae Ero Ho Pet 36 B System Calibration typical soo OA 36 1 Theater audio level adjustments 37 2 Emergency Bypass levels vocis Feo RYME
22. able Almost all of the text within the help files comes from this manual but this has the added benefit of being extremely easy to navigate to descriptions of specific functions and features 33 F DCM IstTime Troubleshooting 1 No PC to DCM Communications If you select Communications Connect and the response is DCM notresponding the most likely a problem with your RS232 connection Check that the RS232 cable is seated properly and you have selected the correct COM port for your computer Try and use another cable or verify the proper wiring using the pinout description in Appendix 1 NOTE Do not use a null modem cable These look correct but are wired different than a stan dard serial cable Also cycle the power of both the DCM and the PC and try again Experiment to make sure you have the correct COM setting COM 1 or COM 2 are the most common settings ANOTHER POSSIBILITY If you Connectas a Normal User and you try a Get Configuration from DCM request on a Secure unit the software will display a DCM Not Responding error message This is normal To get the settings from a Secure unit you must Connectas a Super User Your Super User password must match the password that you stored in the configuration file which resides within the DCM hardware unit or the Connectfunction will not work 2 No audio from front panel monitor speaker If you do not hear any audio on the front panel speaker make sure that the selector switches ar
23. aking two backup diskettes one copy for you and leave one copy at the theater Step 7 Verify proper audio response in all channels E Main Control Screen W hen you activate the DCM Commander software a main control screen will appear This contains menu selections File Communications Configuration Crossover and Help and Status indica tors File Status and Security The File indication shows the configuration file name forthe complete set of parameter settings which are being shown There is only one file active in the Commander software at a time You need to keep track of whether the settings you are looking at on the screen are the same settings which are acting on the audio within the DCM hardware unit The Status indicator will list either Offline or Connected Offline means that you have never se lected the Communications Connect command which causes the DCM Software to exchange star tup information with the DCM hardware unit After selecting Communications Connect the Status indicator will display Connected The Security indicator will show N A not applicable if the file that is visible in the software has been set to the Unsecure mode under the Configuration General Configuration Security menu If you set this to Secure mode and download a configuration file to the DCM this will be indi cated here IMPORTANT If you Connect as a Normal User and you try a Get Configuration from DCM re quest ona Se
24. ction Connect a cable betw een this connector and an external processor box such as the Dolby SA 10 Signals will be routed out of the DCM to the processor box and back into the DCM for output to the amplifiers via the proper DataPorts The pinout of the cable is shown in Appendix 1 B System Calibration typical W hen installing a typical cinema sound system most of the calibration involves the cinema processor Refer to the user manual for the brand and model cinema processor that you are using WARNING Turn the volume knob on all of the QSC amplifiers all the way down until crossover set tings and levels are verified Concerning the DCM portion of the installation you need to start by connecting the cinema processor and amplifier cables Connect a PC computer to the RS232 connector turn on the DCM unit load the DCM Commander PC software and either load a full configuration file if this theater uses the exact same settings as another theater or select and enter all of the data in the Configuration section of the DCM Commander software The General Configuration and Amp amp Speaker Configuration parameters must all be set correct ly for the system to function properly If all system and crossover settings look correct in the DCM Commander software you are ready to start calibration 36 37 1 Theater audio level adjustments The combination of QSC amplifiers and common speakers contained in the software database wil
25. cure unit the software will display a DCM Not Responding error message This is normal To get the settings from a Secure unit you must Connect as a Super User Your Super User password must match the password that you stored in the configuration file which resides within the DCM hardware unit or the Connect function will not work 1 File This menu selection allows you to start your DCM calibration by selecting an existing configura tion file from your hard drive or diskette J ust like all Windows programs it offers the New Open Save Save As and Exit commands Select the New menu option if you have never made a DCM setup before IM PORTANT Always save your final settings to a diskette and keep a copy of both these DCM settings and the DCM Commander software at the theater 2 Communications This menu choice refers to the communications betw een the W indows PC and the DCM hardware unit i Connect Disconnect Selecting Connecttells the program to initialize communications with the DCM hardware unit This will need to be selected before parameter settings can be transmitted to or from the DCM hardware unit Status will indicate Connected ii Get Configuration from DCM This causes all of the crossover monitor setup and fault diagnostics information currently active within the DCM hardware unit to be loaded into the DCM Commander software for viewing and possible editing If these settings have been stored as Secu
26. dix 3 Address amp Telephone Information Address QSC Audio Products Inc 1675 M acArthur Boulevard Costa M esa CA 92626 1468 USA Telephone Numbers Main Number 714 754 6175 Sales Direct Line 714 957 7100 Sales amp M arketing 800 854 4079 toll free in USA only Technical Services 714 957 7150 800 772 2834 toll free in USA only Facsimile Numbers Sales amp M arketing 714 754 6174 Technical Services 714 754 6173 Internet URL www qscaudio com SC 1675 MacArthur Boulevard Costa M esa CA 92626 1468
27. e working properly and then set the DCM to monitor PROC C center This means that the signal that is coming in the From Processor Output connector on the rear panel of the DCM is routed directly to the speaker amplifier and any signal should be able to be heard Connect your cinema processor and play a film sound source Turn up the master volume on the DCM front panel If the sound is there but it is not loud enough you will need to connect the PC Commander soft ware to the DCM unit and verify that the Configuration Monitor Gain Levels settings are not attenuated These settings have an attenuation range of 0dB to 16 dB 3 Some front panel LEDs don t light The DCM Commander software has a section that defines how many surround or subwoofer amplifiers you are using The front panel LEDs and audio monitoring will only allow selection of the channels set in the software To change this setting do the follow ing 1 save any settings in your PC software to a file in File Save as 2 connect to the DCM using the Communications Connect command 3 get the current configuration file by selecting the Communications Get Configuration from DCM command 4 edit the output settings on the Configuration General Configuration Installed Outputs window 5 select Communications W rite Configuration to DCM 6 save this configuration using File Save as and verify proper operation on the front panel 34 VIILSYSTEM INSTALL
28. e left positional speaker and the low frequency transducer and L HI to the amplifier driving the same speakers high frequency trans ducer etc NOTE There is no signal processing of the surround signal in a standard DCM 2 or DCM 3 how ever the system is Active Surround Ready Please contact the QSC factory for more information WARNING Incorrect frequency connections can damage tranducers Physically verify proper connections AND listen to each individual transducer at very low volume before applying full au dio power 2 From Processor Output This connection is from the cinema processor and is the main input of all film sound into the DCM unit The 25 pin connector is an industry standard type and pinout and will connect into your sys tem very easily These cables are available from several cinema supply houses Refer to Appen dix 1 for the pinout detail 3 RS 232 Connection This connects to the RS 232 serial port on an IBM compatible PC All of the crossover functions and many other features are able to be viewed and modified using Windows control software which communicates to the DCM via this connection Appendix 1 details the pinout of this cable 4 Surround Insert The insert connector offers an extremely simple method of routing the surround signals out of the DCM to an external processor box and then back into the DCM for further routing and monitoring Appendix 1 details this cable 5 Emergency Bypass Level
29. er or electronics store Configuration 9 pin SubD male to 9 pin SubD female DCM Pinout Function Digital Ground Loopback 1 Clear to Send CleartoSend Request to Send not used 41 Processor Cable Detail Cinema Processor to DCM The Processor cable connects the audio signal outputs from the Cinema Processor to the DCM signal inputs This cable is available from Cinema equipment suppliers Configuration 25 pin SubD male to 25 pin SubD male DCM Pinout Left Let Chassis Ground Chassis Ground AN IA pT Subwoofer C C C C 2 5 EA A A AA 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 42 Dataport Cable Detail DCM to QSC Ampliers The DataPort cable contains all of the input output and monitoring signals between the DCM and the QSC amplifiers These can be a standard VGA cable but be careful that the connections are pin to pin for all 15 pins QSC offers these cables with special shielded internal cable for even higher quality Configuration 15 pin SubD High Density male to 15 pin SubD High Density male DCM Pinout Fumetion Cho O Standby Pp CRIVMON Pp CHIMON O motused AA Chassis Ground ChlOt C204 gt motused Signal Ground P Ch20u Ch 2 VMON Ch 2 IMON Ll notused 7 7 10 Il 12 notused 13 14 15 43 Surround Insert Cable Detail DCM to Special Surround Proc
30. essor Unit The Surround Insert cable connects the audio signal inputs and outputs which are needed to insert a Dolby SA Surround Processor Configuration 9 pin SubD female to loose wires attach to terminal strip Pinout Function 7 44 Appendix 2 DCM Series Specifications typical General Dimensions Line Voltage Safety Regulations EM C Regulations Connectors Screen Dataports Conversion Filter Type Surround Dataports Conversion Filter Type Subw oofer Dataports DCM 1 Conversion DCM 2 amp 3 Conversion Filter Type 45 19 wide x 5 25 high x 14 deep 85 VAC 260 VAC 50 60 Hz UL 813 CSA FCC Class A 9 pin RS232 female 25 pin D sub female From Proc Output 15 pin D sub HD female Amplifier Dataports 9 pin D sub Surround Insert male 6 connection screw terminal Sub Out amp Hearing Impaired Output 24 bit Delt Sigma 128x oversampling DSP 24 bit digital IIR filters DCM 1 none DCM 2 amp 3 none Active Surround Ready DCM 1 external DCM 2 amp 3 external internal ASR none 24 bit Delt Sigma 128x oversampling DCM 1 analog DCM 2 amp 3 DSP 24 bit digital IIR filters Subwoofer Screw Terminals M ax Output Level Output Z Hearing Impaired Output M ax Output Level Output Z PC Communications Baud rate 14 2 dBu 4 0 Vrms 50 ohms 596 11 8 dBu 200 mVrms 50 ohms 596 19 200bps 46 47 Appen
31. hardware unit needs to know if you have wired multiple speakers to an amplifier output Simply indicate if any speaker transducers are wired in series or parallel branches here so the DCM can compensate for the impedence changes that this wiring will cause For example if you have two speakers connected in parallel on the output of an amplifi er you would set the banches setting to 2 IM PORTANT In the case where an amplifier is in bridge mono mode and you have two speakers connected in parallel you M UST set BOTH amplifier channels to BRANCHES 2 because this is the load impedence seen at BOTH output connections Setting these impedences correctly is very important for proper Load Fault detection Impedance Limits Screen Channel Arrangements Surround Channel Arrangements SERIES MEE oranches E sura SERIES MST orancres A EN En SUR 2 SERIES BRANCHES SERIES BRANCHES MNT SUR 3 SERIES MEE 1 eraniches MN WE EE Subwoofer Channel Arrangement R SERIES BRANCHES ME SUBS SERIES MEE 1 eraniches MN d Impedence Limits This allows a technician an overview of the impedence settings when troubleshooting aker Configuration NOTE This panel is used for development diagnostics purposes only 26 iii Speaker Database This window gives access to an extensive database of cinema speaker settings which can fully configure the crossover and fault monitoring functions Each of these speaker files has a manufactu
32. he number of channel inputs and crossover types able to be supported by the DCM series General Configuration General Info General Config Installed Dutputs Surround Security E Channel C 8 Channel c Installed Outputs Selecting these check boxes will allow the front panel LED indication and sound moni toring to behave correctly For example the front panel monitor selector LEDs for Sub 3 and Sub 4 will not be able to be selected if you only check the Sub 1 and Sub 2 check boxes here 21 eral Configuration Iv Sub1 M Sub2 Iv Sub3 M Sub4 d Surround This screen presents the surround processing options Standard versions allow external processing of the surrounds using products such as the Dolby SA 10 DCM 2 and DCM 3 Active Surround Ready configuration options will be shown here if this feature is installed General Configuration General Info General Config Installed Outputs Surround Security Surround Input Select C Extemal 54 10 Detected Surround Option Board Type TYPE PASS THROUGH e Security Password security is available for situations where you want to keep your system set tings confidential If you select and enable the Secure mode by writing to the DCM a password will be required before using the command Get Configuration from DCM see Communications If you are trying to change a setting ina DCM unit which has Secure settings and you do not have the password to retrieve
33. ion connectors Which makes a QSC cinema sound system extremely easy to wire together 1 Amplifier DataPorts One QSC amplifier DataPort includes all connections required to send two channels of audio from the DCM to the amplifier input circuitry and current and voltage information back from the two speaker terminal outputs Also included on this connector is remote on standby pin which allows the DCM to act as a master system power controller Computer industry VGA style cables can be used to connect between the DCM and QSC amplifi ers However make sure that your cable passes ALL connections between the two 15 pin connec tors See Appendix 1 for pinout information Contact QSC if you would like to purchase specially made cables The maximum output configuration on the DCM 1 is a 6 ch 2 way the maximum DCM 2 is a 6 ch 3 way and the maximum output configuration on the DCM 3 is a8 ch 3 way In addition many parallel outputs with separate processing are included for additional theater configuration flexibility The rear panel labelling on the DCM has all of the information required by an audio installer W hen starting write down the EXACT SPEAKER CONFIGURATION for example 8 channel Tri 14 15 amp with 3 surrounds and 4 subs Now you can follow the rear panel text which shows both channel position L or C or R etc and the frequency output LO M ID HI etc Connect the L LO output to the correct amplifier driving th
34. isateurs de la pr sence d instructions importantes pour le fonctionnement et l entretien service dans le livret d instruction accompagnant l appareil P ERKLARUNG DER GRAPHISCHEN SYMBOLE Der Blitz nach unten zeigendem Pfeil in einem gleichseitigen Dreieck weist den Benutzer auf das Vorhandensein einer unisolierten gef hrlichen Spannung im Geh use hin die stark sein kann einer Person einen elektrischen Schlag zu versetzen Das Ausrufzeichen in einem gleichseitigen Dreieck weist den Benutzer auf wichtige Betriebs und Wartungs vorschriften in den beiliegenden Unterlagen des Ger tes hin P RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION To reduce the risk of electric shock do not remove the cover No user serviceable parts inside Refer servicing to qualified service personnel WARNING To prevent fire or electric shock do not expose this equipment to rain or moisture RISQUE DE CHOC ELECTRIGUE NE PAS OUVRIR ATTENTION Pour eviter les risques de choc lectrique ne pas enlever le courvercle Aucun entretien de pi ces int rieures par l usager Confier l entretien au personnel qualifi AVIS Poureviterles risques d incendie ou d lectrocution n exposez pas cet article la pluie ou a l humidit GEFAHR EINES ELEKTRISCHEN SCHLAGES NICHT OFFNEN VORSICHT Um das Risiko eines elektrischen Schlages zu vermindern Abdeckung nicht entfernen Keine Benutzer Wartungsteile im
35. ity within the theater M any installers pride themselves on being able to adjust the electrical parameters crossover points equalization delay etc to exactly compliment the speaker and room interac tions As such their ability to set these parameters is a value added service which deserves protection from competitors We have therefore included a security system where you can pro tect your settings within the DCM from being uploaded and copied by the DCM Commander soft ware Only your unique password will allow viewing or editing of the crossover settings however should you forget your password an entirely new configuration can be loaded 7 Emergency Bypass One of the main design goals of the DCM series was to offer a foolproof method of getting sound into the theater no matter what To accomplish this a passive crossover has been built into the center channel routing so that even with a total loss of power to the DCM a usable sound path will be maintained Activation of this bypass is done by the projectionist via a front panel Emer gency Bypass switch 8 Surround Insert Connections There has been discussion concerning format changes to the cinema surround channels To allow maximum flexibility we have included an extremely easy method of routing the surround signals out of the DCM to an external processor box such as a Dolby SA 10 and back into the DCM for routing to the QSC amplifiers 9 Active Surround Ready The
36. l require little or no DCM adjustment Transducer sensitivity imbalances within the speakers have been compensated for by the factory recommended crossover settings If you are using a pow ered subwoofer or a speaker not contained in the factory supplied speaker database you may need to make level adjustments 2 Emergency Bypass Levels When the emergency bypass switch on the front panel of the DCM unit is activated a passive crossover good old resistors and capacitors are used to divide the center channel audio signal into either a 2 way signal high frequency and low frequency or a 3 w ay signal high mid low The relative volumes of these signals can be adjusted on the rear panel of the DCM unit Feed pink noise into the center channel input compare the center channel sound while in front panel switch is in the normal position to the sound while in the bypassed position While in the bypassed position adjust the potentiometers to most closely match the normal position sound 3 Monitoring audio mix adjustments The PC software allows balancing of the high low or high mid low signals being fed to the front panel monitor speaker Input pink noise into all of the DCM input channels and select individual channels using the DCM front panel buttons Select the surround channels first to make a refer ence level the standard DCM units contain no processing of these channels Now select other channels one at a time and balance these gain
37. mander software your unit will be set to default crossover settings You must reprogram these settings to match your speakers and installation WARNING Do not send audio to your amplifiers and speakers until you have verified that the crossover and gain settings are appropriate Incorrect crossover settings can damage speakers NOTE all screen channels default to a crossover frequency of 1 5 kHz In a typical installation you will need to do the following Step 1 Connect the DCM hardware unit to your PC serial port and start the DCM Commander software Step 2 Go to the Configuration section and open the General Configurations window Step 3 Fill in the appropriate settings such as name date which outputs you need to use etc Step 4 Go to the Amp amp Speaker Configuration window and select the Amplifier models that you are using and the Speaker models the most common cinema speakers will be listed Your setup is now 90 complete Step 5 Goto the DSP Settings window Verify all of the parameters that were automatically set by your Amplifier and Speaker choices If you want to change anything just select Customize and the parameter fields can be editted There are a few settings which are not automatically entered such as whether or not a Screen EQ should be applied to the screen channels Verify all of these settings and you are ready to download everything to the DCM hardware unit WARNING The next step can change all
38. moe oux de petat reir e AEG Ra oi rq geb pues ke d a 17 D Working with Configuration Files 17 1 Your First Configuration File 17 2 Editing a Configuration File 18 E gt Main Control A osa p eb itas Pb ob Siac 19 m M NETTE E MU EUN ea 19 2 COMMUNICATIONS 3 55 72 A bou etu AA 20 i Connect Disconnect dd A a 20 ii Get Configuration from DOM 5555 odore db eie RD a 20 iii Write Configuration to DOME socer m aeta a pr e a 20 Ius afa POL cu ince C Ms ek rt di vada 20 JONG UA s ooo S teta anise tach spem ea i e uh oh as 20 i General Configurations ei o ita d ee Ld ex Cedex dt 20 a General INO EET 20 b General Config tats g Maka EE E E 21 c Installed Outputs ai ire ped vic Certo E DR ePi 21 A reta d t sea i Sie carn e aeta 22 BS GUIDE Sos tradet daa ebur ae oet ade o ette eet 22 ii Amp and Speaker Configuration Settings 23 a Amplifier Models 23 b Speaker Models LR PNR A 24 c Speaker Arrangement 2 5 cocos ecc RGB ISO UR ELO RE 25 d Impedence LIMES v Re ri tdi eed 26 iii Speaker Database roots desi A ht pt reb bota 2 a Default amp Custom Database 27 iv M onitor Gain ENS sente uen a us as Lee 21 A S DO een adde opa a da Ria Rua Pepe ind Voas im Ede pae hc arp heed 28 A A dad
39. monitor cable 15 pin male to computer monitor cable 15 pin male to computer moni tor cable 15 pin male to 15 pin male can be used but verify that all pins have unique connec tions on both sides of the cable QSC can supply these cables with high quality shielded audio wires within the cable for maximum interference protection 2 Programmable routing and crossover settings Almost all of the internal circuitry within the DCM series can be adjusted using commands over the RS 232 port from the DCM Commander software Configuration files can be stored to a dis kette and used for other DCM s For example if a megaplex theater has many rooms with similar Size and equipment an installation technician can adjust one DCM unit for best results and then download all of these settings to other DCM units The functions that can be controlled remotely are crossover settings for screen channel outputs mutes multiple equalizer settings per channel delay times output volume levels some channel assignments monitor mix balance adjustments and more 3 DSP processing Digital filtering of audio signals is known to have several advantages over analog solutions DSP digital signal processor IC chips allow extremely accurate and reliable control over frequency and time adjustments boost cut cutoff frequency delay time and stability immunity from tempera ture variations The audio path of the DCM uses conversion circuitry changing the signal
40. of the audio signal volumes and frequency con tent Incorrect frequencies can damage speakers Also it is a good idea to turn down the volume on all amplifiers during initial setup procedures Step 6 Select Connect Write Configuration to DCM All of the settings that you made are now programmed into the DCM hardware unit Step 7 Save this file on two backup diskettes one copy for you and one copy to be left at the theater Step 8 Verify proper audio response in all channels NOTE Always optimize the DCM response before doing any processor EQ adjustments 2 Editing a Configuration file In simple terms you will need to work like this Step 1 Start by saving any settings that are currently in your DCM Commander software Step 2 Get the currently active settings configuration file from the DCM hardware unit by se lecting Connect Get Configuration from DCM Step 3 Save this pre modification file as a backup Step 4 Modify a parameter usually in the DSP Settings window document any changes in the configuration name and notes at least your name version number and the date modified 18 19 WARNING Remember the next step can change all of the audio signal volumes and fre quency content Incorrect frequencies can damage speakers Turn down the volume on all amplifiers Step 5 Write the file back to the DCM by selecting Connect Write Configuration to DCM Step 6 Save this post modification file by m
41. over on the Surround signals so the level adjustment here merely allows you to adjust the monitor output volume relative to the L C R output 27 The volume control on the Subwoofer signal also allows monitoring adjustments relative to the L C R volume NOTE You should start by matching the AM P and PROC overall volume levels on the screen channels Then match the surrounds and sub level to this reference to allow accurate A B comparisons Monitor Gain Levels for itoring All surround signals are nbined similarly is written to the DCM Highs 8 dB Mid d Lows EE dB Surrounds EE dB Subs NE dB 4 Crossover i Screen DSP Settings Left Center and Right input channels are processed by a state of the art DSP digital cros sover All of the parameter settings are highly accurate do not drift and are repeatable from unitto unit These settings can be modified and stored in Configuration files and activated using the Communications W rite Configuration to DCM command a Screen Signal Path This shows a block diagram of the signal path through the different filters delays and gain blocks Select which channel you would like to view L LC C RC R Clicking on any of the function blocks will cause the screen to jump directly to the appropriate area on the Screen window This is an easy method of finding the correct parameter to edit NOTE There is no signal processing of the surround signal in a standard DCM howev er
42. r settings ARE NOT set by selecting a SUB Speaker in the AMP amp Speaker Configuration Speaker Models window That sets the impedences only Always set these either by loading a full configuration file from a similar venue or manually Sub DSP Settings Sub Signal Path High Pass Filter Frequency ER Alignment Flat 0 0 707 C B6 Q 2 000 Normal C Inverted 31 iii Mute Settings This window allows all channel on off settings to be changed This is usually only used dur ing setup or trouble shooting when testing single output channels in the theater REMEMBER All parameter changes become active within the DCM hardware unit only af ter selecting Communications Write Configuration to DCM ster muting supercedes channel and band level muting while n the DCM All mute settings will remain they are unmuted th el CHANNEL LEVEL MUTING BAND LEVEL MUTING Sub 1 3 Sub 2 4 iv Fault Diagnostics The fault diagnostics window is where you look if the Load Fault LED lights up If a load fault was detected and is still active this will be shown in red on this screen you can also select Show Faults Only Non active faults ones that happened earlier but were cor rected will also be shown on the Show Faults Only screen This powerful feature will tell you exactly which channel has the problem and was it due to a short or open connection This offers a very accurate history of amplifier output c
43. re settings you will be prompted for a matching password WARNING Uploading will overwrite delete all of the settings in your DCM Commander control software Save your screen settings before doing this iii Write Configuration to DCM By writing data to the DCM you will cause all of the crossover monitor setup and fault diag nostics settings currently in the DCM Software to be transmitted to the DCM hardware unit and activated This will overwrite erase forever any previous settings contained within the DCM hardware unit WARNING Writing will overwrite delete all of the settings in the DCM unit Be sure to save the current DCM settings before doing this iv Serial Port The control software allows setting of different COM port numbers 3 Configuration A Configuration is the complete set of parameter settings which change the audio routing cros sover filters gains delay fault detection diagnostics and monitor behavior within the DCM hardware unit i General Configurations a General Info A configuration can have a name which allows an installer the ability to create different versions of control settings and store them with unique names Configuration Notes might contain installation details such as the installers name theater location etc 20 ne Optional red before other ied Configuration Notes Optional Mfg Configuration b General Config This section is mainly designed for selecting t
44. rer name M ake a model number a crossover type 1 way 2 way or 3 way and the manufacturers impedance specifications Speaker models are separated into two cate gories Default supplied by QSC or Custom created by you a Default Database M any speaker types that are common in the cinema industry are available here b Custom Database If you make or modify a factory speaker you can adjust the crossover for maximum per formance and save those settings into a custom speaker database NOTE to create a Custom Speaker M odel see DSP Settings Speaker Database Default Database DEFALILT DBF C Custom Database CUSTOM DBF Speaker List Crossover Type C One way full range CB2591 Impedance Ratings CB523 MIN Q NOMQ M x a CB523M z il MC4953 ias e nag ren MC4373 Mid T 8 100 TS 550DLX TS 3040DLX Low Full con e 100 TS 3840DLX TS 382LX Variplex Variplex B Variplex D iv Monitor Gain Levels When monitoring audio from the front panel speaker in the AM P mode the signal that you are listening to is AFTER the crossover For example when monitoring the left amplifier signal the DCM actually combines the different frequency outputs which comprise the LEFT signal This window allows you to adjust the relative volumes of the post crossover signals sent to the front panel monitor speaker Once set these will cause the same mix in the Left Center and Right channels There is no cross
45. s and Routing These are used to adjust the passive crossover used by the Emergency Bypass feature The signal level of the passive crossover outputs sent from the DCM to the center channel amplifier can be adjusted to best suit the center channel transducer sensitivities The BYPASS CROSSOVER MODE switch DCM 2 and DCM 3 only internally routes the Center channel input signal through the 2 way passive crossover orthe 3 way passive crossover This signal path is only active if the front panel Bypass switch is in the Emergency position 6 Terminal Strip Connections The terminal strip includes convenience connections for a powered sub woofer output a Hearing Impaired audio output and on the DCM 2 and 3 a remote control on off logic connection EX for the surround decoder system The powered subwoofer output SUB OUT contains the exact same signal as the subwoofer output used on DataPort G It is assumed that you use either DataPort G or the terminal strip con nection but not both at the same time Due to obvious reasons this connection will not be able to be monitored or included any of the Fault Analysis functions because there are no connections back from this external speaker WARNING When using a powered subwoofer there is no fault sensing available to warn a pro jectionist of a system connection problem The Hearing Impaired output is a single mono audio output which contains a mix of the L C and R positional signals Center
46. se to save just that one channel s filter gain and delay settings The selected channel will become the basis for the speaker s definition By saving to the Speaker Database you can organize the crossover settings for a single channel speaker for easy retrieval in future installations The Copy function allows all of DSP settings for that channel to be copied to other channels A NOTE ABOUT SPEAKER MODELS You should be careful to rename a speaker model if you make ANY changes to it Good version control will eliminate confusion when you come back to your installation many years from now WARNING If you accidentally assign a 3 way speaker to a 2 way DCM configuration the crossover settings will be set to the high frequency and low frequency band settings no mid range ii Sub DSP Settings All settings for the Subwoofer channel are here The DCM 1 uses analog processing no DSP and offers several high pass filters and gain adjustment The DCM 2 and DCM 3 use DSP processing and offer finer resolution of the high pass filter and improved accuracy a Sub Signal Path This screen shows the block diagram of the Subwoofer channel Click on a function block except M ut mute to change to the appropriate area of the Sub Settings screen 30 Sub Settings n pa GAIN POL MUT b Sub Settings High pass filtering and gain are available for fine tuning the response of your subwoofer channel NOTE The Sub filte
47. settings for a sound level similar to the surround channels NOTE All adjustments are made in the DCM Commander software That is all the calibration necessary for a typical first theater installation In M egaplex theater installations with similar rooms and similar equipment these settings can be stored and quickly downloaded to the DCM unit in each theater System Calibration advanced 1 Speaker Frequency adjustments The manufacturer of any loudspeaker will be able to supply you with recommended crossover set tings The DCM offers additional filters high pass parametric EQ screen EQ and Horn EQ driv er and channel delay polarity and gain adjustments which can be used as additional compensation for speaker and installation characteristics 2 Setting Delay Times Driver delay settings compensate for the physical displacement between transducer centers within one speaker Consult the speaker manufacturer for help in determining this setting Chan nel delay compensates for the distance that a speaker is located from the screen We have in cluded some screen delay adjustment but most typical theaters will not need to use this because surround channels are delayed coming from the cinema processsor Consult an acoustic consul tant for the proper calibration method or experiment until the sound from the screen together with sound from the surround speakers sounds more clear 38 39 D System Installation Troubleshooting
48. specially in megaplexs with similar rooms Preprogrammed speaker setting database for most common theater speaker brands and models supplied by QSC Indicates if something is wrong with the sound system plus gives simple diagnostics to help find problems An emergency bypass system allows center channel sound to pass through the system even if there is a major problem Allows easy routing and crossover adjustments e Protects system adjustments from tampering e Sound quality is state of the art high dynamic range Projectionist Features Easy to verify that all of the audio in the theater is okay e Automatic monitoring will light an LED if there is trouble with a speaker output backup system emergency bypass can be easily activated 1 QSC Amplifier DataPorts The QSC DataPort connectors greatly reduce the complexity of wiring between the DCM unit and the amplifiers These DataPorts replace the need for preparing XLR or screw terminal connections for the main amp audio inputs AND they replace the connections required to monitor the outputs of the amplifier speaker connections Another unique feature of the QSC Cinema System is the ability to automatically analyze voltage and current status to determine shorts or opens in the speaker cables All of these connections are completed via the ONE DataPort mass termination cable A VGA computer monitor cable 15 pin male to computer monitor cable 15 pin male to computer
49. the either the output level of the DCM must be made lower orthe amplifier sensitivity must be changed Referto the amplifier manual which tells how to do this The DCM output level can be adjusted in the DCM Commander software This is done in the Crossover DSP Settings Gain Remember that these gain settings compensate for driver sensitivity differences so all the high and low or high mid low gains should remain the same number of dBs apart compared to their factory speaker setting 4 If switching to bypass does not restore sound The circuitry w hich the signal passes through in the Bypass mode is extremely simple resistors and capacitors which do not require power Therefore if you set the Bypass switch to the EM ERGENCY position and you do not get sound out of the center speaker the problem is either 1 no input to the DCM or 2 the center channel amplifier is off or the volume is down or 3 there is a cable problem from either the DCM to the amplifier or from the amplifier to the Speaker NOTE If the DCM unit is okay place the Bypass switch back to the NORMAL position and the Load Fault indicator will light after a few minutes if there was a gross defect open circuit or short in either of these cables 40 Appendix 1 RS 232 Cable Detail DCM to Computer Connection The RS 232A cable is required to allow your PC to communicate with the DCM hardware unit This cable can be purchased directly from any comput
50. these settings you have two options 1 obtain the backup diskette with these files files are not password pro tected load them into the DCM Commander change the password or select Unse cure and then download your settings using the Write Configuration to DCM command or 2 completely reprogram the parameter settings in the DCM Software and 22 23 overwrite the DCM settings using the Write Configuration to DCM command In conclusion Secure mode adds password protection to the configuration file within the DCM hardware unit The configuration files stored in your computer or on a diskette are NOT password protected General Configuration General Info General Contig Installed Outputs Surround Security n parameters supplied upon conr is for ii Amp and Speaker Configuration Settings This window provides an extremely easy and powerful method of setting all of the control parameters for the crossover and diagnostics functions a Amplifier Models Select exactly which QSC amplifier model is being used in your installation The DCM hardware unit needs this information to properly measure wiring or speaker load faults NOTE If you leave this choice as Unknown load fault indication will be turned off for that channel Amp amp Speaker Configuration Amplifier Models Speaker Models Speaker Arrangement Impedance Limits ct model will ensure accurate nel ecutable directory QSC Amplifier Port LE
51. ts to which physical channels DataPort cables can be computer industry VGA style cables but make sure that your cable passes ALL connections between the two 15 pin connectors See Appendix 1 for pinout information Contact QSC if you would like to purchase specially made cables that use shielded audio cable 5 Processor Connections M any common cinema processors use a standard 25 pin subD connector for their outputs or have adapter cables available The DCM From Processor Output connector conforms to this industry standard pinout It is recommended that you purchase a standard 25 pin cable from any of the well known cinema industry cable suppliers 6 Impaired Hearing Connection The Hearing Impaired output signal is available on the screw terminal connector on the rear of the DCM This signal is unbalanced the label is the hot and the label is a ground refer ence The output signal is similar to levels that are output from a standard CD player 7 Powered Subw oofer Connection Screw terminal connections make it possible to send a balanced signal to a powered subwoofer This signal is balanced and the circuitry is designed for long cable runs from the projection booth to the theater screen The high pass filtering and level adjustments are done by the DCM unit NOTE There will be no fault analysis or output audio monitoring available for the sub channel signal if this connection is used 8 Surround Insert Conne
52. urrent and voltage and can possibly help with understanding other system problems NOTE Turning the DCM off for a minimum of 15 seconds will erase and reset the fault memory REMEMBER If you just want to know which channel had a fault indication press the Diagnostics button on the front panel and the LED over the problem channel will light up The PC display window DOES NOT update the fault status in real time Press the Refresh button to retrieve the fault history file from the DCM hardware unit This status is also up dated when you activate the Communications Get Configuration from DCM command 22 Fault Diagnos MinImped Maxlmped Meas Imp 1 00 Ohms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 000hms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 000hms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 000hms 100 00 Ohms 1 000hms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 000hms 100 00 Ohms 1 000hms 100 00 Ohms 1 00 Ohms 100 00 Ohms 1 000hms 100 00 Ohms ing at applying QV VV ID DD i Show Last Reading A Show Impedance Limits Show Faults Only elie C Show Voltage and Current 5 Help i About This shows the software version number for reference when talking with customer service or keeping track of software updates ii Contents A table of contents for the help file allows you an overview of the help subjects avail
53. uts into the DCM actually make it through the DCM the DataPort cables and the amplifier unit all the way to the speakers and that the speaker connections are not electrically shorted or open All of these measurements are being performed constantly without user action on ALL output channels and any unusual readings will light the Load Fault LED If the Load Fault LED is lit pressing the Diagnostics button and holding it pressed will cause the problem channels indicator LED to light This information will let you inspect the system cabling for that channel and troubleshoot the problem There are two types of indication If the PROC LED and AMP LED are on there is no amplifier detected at that DCM amplifier connector If the AMP LED is on the amplifier on at that output is measuring a short or an open on its output terminals REM EM BER If you configured the DCM Commander software to not have certain channels for example there is no SUB 3 or SUB 4 these channels WILL NOT indicate any faults VERY IM PORTANT The Load Fault detection software within the DCM unit uses a complex averaging algorithm which compares input signals to output signals and measures voltage and current on all amplifier outputs To sense real world conditions these measurements must be found to be out of range many times before the Load Fault condition is indicated on the DCM front panel So if you are simulating fault conditions you M UST have a real world signal
54. ws 95 or Windows 98 Minimum 16M B of RAM Minimum 1M B of available hard disk storage space A 3 5 1 44M B floppy drive ro CDROM drive depending on software provided An available RS 232 serial port A display capable of at least 640X480 resolution in 16 colors A standard DB9 RS 232 cable male to female To complete a full Cinema System you will also need a cinema processor QSC DCA amplifiers speakers and cables IV PACKAGE CONTENTS Open the box and remove the contents You will find the following items This user manual An envelope containing the DCM Commander installation diskettes or CDROM with the software license agreement A linecord for connection to AC power The DCM hardware unit main assembly either a DCM 1 or a DCM 2 or a DCM 3 If anything is missing immediately contact your salesman V SYSTEM CONCEPTS A System Design Features The DCM series Digital Cinema M onitor has many unique features which combine to make this the most cost effective and versatile systems solution in the industry This system addresses the following needs Installer Feature e Provides M onitor and Crossover functions in one box Minimizes the amount of cabling required only one cable per amplifier contains two signal inputs two signal returns power on standby control and two channels of load monitoring Minimizes setup time e
55. y audio signal is on channel 1 of DataPort E If you were installing a 2 way system BI AMP then the left center low frequency audio signal is on channel 1 of DataPort E DCM 2 and DCM 3 DataPort ABC and EF Detail 11 VI DCM HARDWARE DESCRIPTION A Front Panel Features The front panel of the DCM series resembles traditional cinema monitor products This was done to allow a typical machine room projectionist a well known and easy to understand user interface This also follows our design goal of presenting an easy to understand product to the user while still offering a state of the art cinema sound control system for installation technicians and advanced users 1 Power On Off The power on off switch acts as a master control for not only the DCM but also all of the amplifi ers connected into the system as long as the amplifier power switches are on This is possible because the DataPort connections on all of the amplifiers have a standby control pin which is grounded when the DCM is turned off Because of the unique zero inrush feature on DCA amplifi ers no additional startup sequencing is required The Emergency Bypass circuitry requires that the center channel amplifier remain on if the front panel switch is in the EM ERGENCY position This causes the follow ing situations When the Emergency Bypass NORM AL DCM power on off also switches the QSC amplifiers between on standby When the Emergency Bypass EM ERGENCY D

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