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QSC Audio DCM 30 manual

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Table of contents for the manual

  • Page 1

    DCM Series Digital Cinema Monito r & Crossover Sy stem User Manual DCM 10 DCM 10D DCM 30 DCM 30D *TD-000265-00* TD-000265-00-A[...]

  • Page 2

    Important Safety Instructions & Explanation of symbols 1- Read these in structions . 2- Keep these in structions . 3- Heed all warnings. 4- Follow all instructions. 5- Do not use this apparatus near water . 6- Clean only with a dry cloth . 7- Do not block any ventilation opening s. In stall in accordance with QSC Audi o Prod uct’ s instructio[...]

  • Page 3

    FEDERAL COMMUNICA TIONS COMMISSION (FCC) INFORMA TION NOTE: This equip ment has been tested and found to comply with th e limits for a class B digital dev ice, pursuant to part 15 of the FCC rules. These limits are desig ned to provide re asonable pr otection against harmf ul interference in a residential installation . This equi pmen t generates, [...]

  • Page 4

    Introduction Thank you and co ngratulati ons on your purc hase of the QSC DCM Digit al Cin- ema Monitor . This product repres ents the sta te-of-the-a rt for cinema- based signal pr ocessing an d monito ring functi ons in a sin gle, integr ated syst em. Designed to compliment QSC’ s DCA (Digit al Cinema Amplifier) Series and DCS (Digital Cine ma [...]

  • Page 5

    Sy stem Concepts Installer Features: •Provides Moni tor and Cr ossover f unctions in one box. •Minimizes th e amount of cabling required . Only 1 cable per am plifier channel pair . •Minimizes setup time, particularly in megaplex s with similar ro oms. •Provides lou dspeaker setting data base for most common th eater lou dspeaker br ands an[...]

  • Page 6

    1- Power switch 2- Monitor output loudspeaker 3- Power “o n” and di agnostic s indica tor LEDs 4- Monitor source s elector bu ttons 5- Amplifier/Processor selector button 6- Monitor output test points 7- Bypass switch and indicator L ED 8- Monitor vo lume co ntrol 9. Alternate EQ Select- Co nnecting this ter minal to ground with an external swi[...]

  • Page 7

    Illustrations- Rear Panels DCM 10 and DCM 10D (Digital In puts only on DCM 10D model) DCM 30 and DCM 30D (Digital Inputs only on DCM 30D model) 1- Firmware update mode se lect 2- USB port 3- External loudpseaker connector and s elect 4- Subwoofer output 5- Alternate equalization se lect input 6- Auxiliary audio in put 7- Hearing impaired output 8- [...]

  • Page 8

    Hardware Description Front Panel The front pa nel of the DCM series res embles traditio nal cinema mon itor produc ts. This provid es the proje ctionist a well known and easy to understand i nterface. Power Switch: The power on/off switch is the master cont rol for the DC M and the am plifiers conn ected to it. Amplifiers must be connected t o the [...]

  • Page 9

    Hardware Description (continued) NOTE: The DCM 10 and DCM 10D ha ve one output for ea ch surround zone an d 4 sub outputs. NOTE: All combining of the individual fre quency outputs (2-wa y , 3-way , or 4-way) is done automat ically , so all front panel moni - toring is of a full frequency signal. Monitor V olume : The Monit or V olume control i s us[...]

  • Page 10

    Hardware Descri ption (continued) Rear Panel Amplifier DataPorts: Each DataPort provides two channels of audio from the DCM to the QSC amplifier in put, as well a s current and voltage monitoring of the amp’ s loudsp eaker outpu ts. Remote po wer on/st andby contr ol of the am plifier is also provide d, all ow- ing the DCM to act as a mas ter sys[...]

  • Page 11

    Hardware Description (continued) BYP ASS CROSSOVER MODE Switch : The BYP ASS CROSSOVER MODE switch routes the center chan nel input sign al through th e 2-way or 3-wa y bypass cross over on the DCM 30/ 30D. On the DCM 10/10D, the ce nter channe l is routed t hrough the 2 -way bypass cros sover or not proc essed at all (pas sive bypass). Bypass Cros[...]

  • Page 12

    Mounting Rack Mounting When rack mounti ng the DCM, s ecure the DCM to th e rack rails using four ma chine screws and washers o f the proper s ize. Most US rack equipment acce pt s #10-32 machines screws; length us ed depends upon applicat ion. The DC M will require 3-RU (rack units) of space. T o rack mount your DCM: 1- select moun ting location 2[...]

  • Page 13

    Software Description DCM Manager Windows Software T o access the functions of th e DCM hardware , you must use QS C’ s DCM Manager 2007 co ntrol software . A USB cable is us ed to conne ct your PC to the DCM. One of the computer’ s availab le USB ports provide s communications be tween the DCM Manage r software and the DCM hardware. The PC mus [...]

  • Page 14

    Connections Making the re quired conn ections to t he DCM is simp le. Just make sure that you have all of the co rrect cables . “Mass-te rminatio n” connectors are used whe rever possib le. This re duces insta llation time fr om hours to minutes and ma kes any req uired conn ection changes fas t, easy , and reliable . Required Cables 1- IEC-sty[...]

  • Page 15

    Connections (continued) DataPort The QSC DataPo rt conne ction carrie s input si gnals, am plifier output moni toring signa ls, remote a mplifier powe r on/ standby contro l, amplifier temperature, and more, all o n one cable. Each DataPort is clearly mar ked indica ting which channel’ s amplifier it should be connected to. Follow t he back panel[...]

  • Page 16

    Connections (continued) MAIN ANALOG INPUT Pino ut Configurati on: 25-pin S ubD male to 25-pin SubD male. Pin # Signal Desc ription 1 Chassis Ground 2 Left + MAIN ANALOG INPUT 3 Left Center - 4 Chassis Ground 5 Center + 6 Right Center - 7 Chassis Ground 8 Right + 9 Chassis Ground 10 Surround L eft - 11 Surround Right - 12 Subwoo fer - 13 Chassis Gro[...]

  • Page 17

    Connections (continued) DIGIT AL INPUT Pinout Configura tion: 25-p in SubD male to 25-pin Su bD male. Pin # Signal Descri ption 1 (not used) 2 (not used) DIGIT AL INPUT 3 ( n o t u s e d ) 4 (not used) 5 (not used) 6 (not used) 7 AES1 (L/R) OUT + 8 AES3 (Ls/Rs) OUT + 9 Chassis Ground 10 X1/2 OUT + 11 Chassi s Ground 12 (not us ed) 13 (not us ed) 14[...]

  • Page 18

    Connections (continued) Powered Subw oofer Screw termin al connections mak e it possible to send a balanc ed signal to a power ed subwoofer . This signal is bal anced and the circu itry is de signed for long cable r uns from the proje ction booth to the theater sc reen. The high-pa ss filtering an d level adjustments are done by the DCM unit. NOTE:[...]

  • Page 19

    Sy stem Calibration When installing a typical ci nema sound sy stem, most of the calibration involves the Cinema Processor . Refer to the user manual for the Cinema Proc essor tha t you are usi ng. WARNING : T urn the Gain Controls on all of the sy stem’ s amplifiers all the way down until crossover settings an d levels are verified! Connect a PC[...]

  • Page 20

    T roubleshooting If the DCM Manager program is unable to commun icate with the DCM hardware... • V erify the USB cable con nections. Re- seat each ca ble-end. • T ry a known-good USB cable, if possible. • Confirm the USB port you are using is oper ating properly . Windows has provisions for checking hardwar e in the Windows Contro l Panel. Re[...]

  • Page 21

    T roubleshootin g (continued) If theater audio is distorted ... • V erify that the DCM In put Clip LED i s not lit. If it is, the cinema processor out put signal needs to be turned down. •If any of the amplif ier CLIP warnin g LEDs are illuminat ing, the output level of the DCM must be reduced or ampl ifier input sen si- tivity must be reduced.[...]

  • Page 22

    Specifications DCM Inputs, Main Analog, Surround EX Input Stage T ype Active balanc ed Impedance 20k ohms, Diff erential a nd Single-en ded Maximum Input Leve l +14 .2 dBu (4.0 Vrms) A-to-D Conver sion 24-bit delta-sigma 128x oversample d DCM Inputs, Digital (AES/EBU) Input T ype Balanced Input Impedance 120 ohms Input Sample Rate AES/EBU sa mple r[...]

  • Page 23

    Specifications (continued) Hearing Impaired Output Output Stage T ype Sin gle-ended ba lanced impeda nce Output Impedanc e 50 ohms Nominal Output Level -11.8 dBu ( 200 mVrms) Loading Requir ements Rmin= 2k ohms, Cmax= 4 nano Farads AL T EQ Input Input T ype Contact clo sure across terminals Monitor Loudspe aker Driver 4.5-inch full-range Amplifier [...]

  • Page 24

    How to Contact QSC Audio Products Mailing address: QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA T elepho ne Numbers: Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079 Customer Service (714) 957-7150 or toll free (USA only) (800) 772-2834 Facsimile Numbers: Sales[...]