DCM Series Digital Cinema Monitor & Crossover System User Manual DCM 10 DCM 10D DCM 30 DCM 30D *TD-000265-00* TD-000265-00-A
Important Safety Instructions & Explanation of symbols 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 a dry cloth. 7- Do not block any ventilation openings. Install in accordance with QSC Audio Product’s instructions. Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised.
FEDERAL COMMUNICATIONS COMMISSION (FCC) INFORMATION NOTE: 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 to the instructions, may cause harmful interference to radio communications.
Introduction Thank you and congratulations on your purchase of the QSC DCM Digital Cinema Monitor. This product represents the state-of-the-art for cinema-based signal processing and monitoring functions in a single, integrated system. Designed to compliment QSC’s DCA (Digital Cinema Amplifier) Series and DCS (Digital Cinema Speaker) Series products, the DCM optimizes loudspeaker performance while facilitating easy cinema sound system wiring and configuration.
System Concepts Installer Features: •Provides Monitor and Crossover functions in one box. •Minimizes the amount of cabling required. Only 1 cable per amplifier channel pair. •Minimizes setup time, particularly in megaplexs with similar rooms. •Provides loudspeaker setting database for most common theater loudspeaker brands and models. •Indicates if something is wrong with the sound system and provides diagnostic feedback.
9. Alternate EQ Select- Connecting this terminal to ground with an external switch or relay contact enables an alternate setting of each channel’s parametric equalization. The alternate settings are made at the time of installation by using the DCM software. This allows for an alternate equalization to be quickly enabled during alternative content or advertising playback.
Illustrations- Rear Panels DCM 10 and DCM 10D (Digital Inputs only on DCM 10D model) DCM 30 and DCM 30D (Digital Inputs only on DCM 30D model) 1- Firmware update mode select 2- USB port 3- External loudpseaker connector and select 4- Subwoofer output 5- Alternate equalization select input 6- Auxiliary audio input 7- Hearing impaired output 8- Emergency bypass level controls and switch 9- Main analog input (from cinema processor) 10- Analog/digital input select switch (DCM 10D and DCM 30D only) 11-Surroun
Hardware Description Front Panel The front panel of the DCM series resembles traditional cinema monitor products. This provides the projectionist a well known and easy to understand interface. Power Switch: The power on/off switch is the master control for the DCM and the amplifiers connected to it. Amplifiers must be connected to the DCM with QSC DataPort cables and amplifier power switches must physically be in the “on” position.
Hardware Description (continued) NOTE: The DCM 10 and DCM 10D have one output for each surround zone and 4 sub outputs. NOTE: All combining of the individual frequency outputs (2-way, 3-way, or 4-way) is done automatically, so all front panel monitoring is of a full frequency signal. Monitor Volume: The Monitor Volume control is used to adjust the monitoring volume from the front panel loudspeaker. Rotating the control clockwise increases the volume.
Hardware Description (continued) Rear Panel Amplifier DataPorts: Each DataPort provides two channels of audio from the DCM to the QSC amplifier input, as well as current and voltage monitoring of the amp’s loudspeaker outputs. Remote power on/standby control of the amplifier is also provided, allowing the DCM to act as a master system power controller. Use only QSC DataPort cables. Custom-length DataPort cables with individually shielded-pair construction are available from QSC’s Technical Services Group.
Hardware Description (continued) DCM 10/10D DCM 30/30D BYPASS CROSSOVER MODE Switch: The BYPASS CROSSOVER MODE switch routes the center channel input signal through the 2-way or 3-way bypass crossover on the DCM 30/30D. On the DCM 10/10D, the center channel is routed through the 2-way bypass crossover or not processed at all (passive bypass). Bypass Crossover Level Adjustment Potentiometers: These are used to adjust the characteristic of the Bypass crossover.
Mounting Rack Mounting When rack mounting the DCM, secure the DCM to the rack rails using four machine screws and washers of the proper size. Most US rack equipment accepts #10-32 machines screws; length used depends upon application. The DCM will require 3-RU (rack units) of space.
Software Description DCM Manager Windows Software To access the functions of the DCM hardware, you must use QSC’s DCM Manager 2007 control software. A USB cable is used to connect your PC to the DCM. One of the computer’s available USB ports provides communications between the DCM Manager software and the DCM hardware. The PC must meet the minimum System Requirements as outlined in the Introduction section of this manual. The USB cable should be no longer than 5 meters.
Connections Making the required connections to the DCM is simple. Just make sure that you have all of the correct cables. “Mass-termination” connectors are used wherever possible. This reduces installation time from hours to minutes and makes any required connection changes fast, easy, and reliable.
Connections (continued) DataPort The QSC DataPort connection carries input signals, amplifier output monitoring signals, remote amplifier power on/ standby control, amplifier temperature, and more, all on one cable. Each DataPort is clearly marked indicating which channel’s amplifier it should be connected to. Follow the back panel labelling. Connect each DataPort to its respective amplifier’s DataPort.
Connections (continued) MAIN ANALOG INPUT Pinout Configuration: 25-pin SubD male to 25-pin SubD male.
Connections (continued) DIGITAL INPUT Pinout Configuration: 25-pin SubD male to 25-pin SubD male.
Connections (continued) Powered Subwoofer 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 this sub channel.
System Calibration When installing a typical cinema sound system, most of the calibration involves the Cinema Processor. Refer to the user manual for the Cinema Processor that you are using.
Troubleshooting If the DCM Manager program is unable to communicate with the DCM hardware... • Verify the USB cable connections. Re-seat each cable-end. • Try a known-good USB cable, if possible. • Confirm the USB port you are using is operating properly. Windows has provisions for checking hardware in the Windows Control Panel. Refer to the Windows help system for more information. • Cycle the power of both the PC and the DCM. If there is no audio from the front panel Monitor Loudspeaker....
Troubleshooting (continued) If theater audio is distorted ... • Verify that the DCM Input Clip LED is not lit. If it is, the cinema processor output signal needs to be turned down. •If any of the amplifier CLIP warning LEDs are illuminating, the output level of the DCM must be reduced or amplifier input sensitivity must be reduced. -DCM output level is adjusted using the DCM Manager software. Determine which channel’s amplifier is clipping and make the necessary gain adjustments.
Specifications DCM Inputs, Main Analog, Surround EX Input Stage Type Impedance Maximum Input Level A-to-D Conversion DCM Inputs, Digital (AES/EBU) Input Type Input Impedance Input Sample Rate Active balanced 20k ohms, Differential and Single-ended +14.2 dBu (4.
Specifications (continued) Hearing Impaired Output Output Stage Type Output Impedance Nominal Output Level Loading Requirements Single-ended balanced impedance 50 ohms -11.8 dBu (200 mVrms) Rmin= 2k ohms, Cmax= 4 nanoFarads ALT EQ Input Input Type Contact closure across terminals Monitor Loudspeaker Driver Amplifier Frequency Response Dynamic Processing 4.5-inch full-range 15 Watt class D 142 Hz to 15 kHz (±2 dB) 1.4:1 compression Dimensions 19" (wide) x 5.25" (high) x 15" (deep) Weight 16.
How to Contact QSC Audio Products Mailing address: QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA Telephone 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 & Marketing FAX (714) 754-6174 Customer Service FAX (714) 754-6173 World Wide Web: www.qscaudio.com E-mail: info@qscaudio.com service@qscaudio.
