QSC Digital Cinema Monitor

 DCM FEATURES:

  • Provides Monitor and Crossover functions in one box
  • Digital Signal Processing for State-of-the-art sound quality (high dynamic range)
  • Fast system setup time (especially in megaplexes with similar rooms)
  • Simple connections--only one cable per amplifier contains two signal inputs, two signal returns, power on/standby control and two channels of load monitoring)
  • Exclusive "Load Fault" detection indicates speaker system or wiring faults
  • Simple crossover adjustments via PC with password control for tamper proof system adjustments
  • Lower system cost than existing tri-amp solutions
DCM Specification
 
DCM GENERAL DESCRIPTION
The QSC DCM acts as the interface between a 6 or 8 channel film audio processor and the power amplifiers in a bi-amp or tri-amp cinema sound system. The DCM performs two major function: automatic and manual monitoring of processor and amplifier signals, and fully programmable crossover/EQ filtering.

Dimensions: 19"W X 5.25"H X 14"D
Line Voltage Requirements: 85 VAC–260 VAC, 50/60 Hz
Accessories Included: (1) 6 ft. (2m) UL/CSA line cord
  (1) user manual
  (1) software diskette, 3.5" HD
   
Front Panel Controls  
Power Switch: (1) rocker switch
Monitor Mode Select: (1) momentary push button
Monitor Channel Select: (6 or 8) momentary push buttons
Monitor Volume: (1) rotary potentiometer
Test Lead Connections: (2) test point jacks
Bypass Mode Select Switch: (1) slide switch
Diagnostics Button: (1) momentary pushbutton
Indicators:  
Power Indicator: (1) green LED
Monitor Mode Indicators: (1) green LED and (1) yellow LED
Processor Channel Indicators: (6 or 8) green LEDs
Amplifier Channel Indicators: (13 or 20) yellow LEDs
Load Fault Indicator: (1) red LED
Clip Indicator: (1) red LED
   
Rear Panel Controls  
Bypass Crossover Level: (2 or 3) rotary trimpots
Surround EX Mode Switch: (1) slide switch
Rear panel control connectors:  
Input: (1) 25 pin female D-sub connector
Amplifier DataPorts: (8, 11 or 15) 15-pin female high-density
  D-sub connectors
RS232 Serial Port: (1) 9 pin female D-sub connector
Powered Sub/Hearing  
Impaired Output: (1) 6 terminal screw-terminal connector
Surround EX Insert Point: (1) 9 pin male D-sub connector
AC Power Inlet: (1) IEC style with fuse
   
DCM Inputs  
Screen Channels and Subwoofer:  
Input Stage Type: Active balanced
Input Impedance: 20 k ohms
Maximum Input Level
(Screen Channel)
+14.2 dBu (4.0 Vrms)
Maximum Input Level
(Subwoofer Channel)
+18.2 dBu (6.4 Vrms)
A/D Conversion
(Screen Ch. Only)
24 bit delta-sigma 128x oversampled
Surround Channels: Hardwire pass-thru to DataPort outputs
  (via Surround-Ex Insert)
   
Dataport Outputs  
Screen Channels:  
Output Attenuation Steps: 0 dB to-18 dB in 0.1 dB steps
Dynamic Range: 99 dB
THD+N 20 Hz-20 kHz, +12 dBu  
Input Level, All Filters Flat: 0.02%
Frequency Response: 20 Hz-20 kHz (no filtering)
D/A Conversion: 24 bit delta-sigma 128x oversampled
Filter Topology: 24 bit digital IIR filters
Crossover Filters: Linkwitz-Riley 24 dB/octave digital filters
  programmable in approx. 1 Hz steps from
  150 Hz to 15 kHz
Parametric EQ: Digital bandpass constant Q filter with
  ±10 dB of boost/cut programmable in
  approx. 1/10th octave steps from 80 Hz to
  15 kHz. Q is programmable in 1/10th octave
  steps from 1/10 to 2 octaves.
CD Horn EQ: Available on high frequency outputs only
Screen EQ: Available on high frequency outputs only
Delay: Programmable in 21ms steps from 0 to 21 ms per output
Polarity: Normal, Inverted
Mute: Individual mutes on each screen channel output
Subwoofer:  
Output Stage Type: Single ended (balanced impedance)
Output Attenuation Steps: 0 dB to-18 dB in 3 dB steps
Dynamic Range: 99 dB
THD+N 20 Hz-20 kHz, +12 dBu  
Input Level, All Filters Flat: 0.02%
Filter Topology: digitally controlled analog on DCM-1, DSP on DCM-2 or 3
High Pass Filter: Linkwitz-Riley 12 dB/octave filter.
  Q can be programmed as 0.707 or 2,
  flat or "step-down" operation.
Mute: One mute for all subwoofer outputs
Surround Channels: Hardwire pass-through from processor input
  via Surround Insert
Output Channels (using the  
Surround Insert connector): 2 or 3 selectable on rear panel
   
Amplifier A.C. Control  
all amps power on with DCM activation  
   
Emergency Bypass Crossover  
Filter Type: 1st order Butterworth, 2 or 3 way
Attenuation Range (trimpot): –6 dB to –24 dB
   
Powered Subwoofer Output  
Output Stage Type: Single ended (balanced impedance)
Output Impedance: 50 ohms
Maximum Output Level:
Loading Requirements (total  
of remote & dataport connection): RMIN=2 k ohms CMAX=4 nF
   
Hearing Impaired Output  
Output Stage Type: Single ended (balanced impedance)
Output Impedance: 50 ohms
Nominal output Level: –11.8 dBu (200 mVrms)
Loading Requirements: RMIN=2 k ohms CMAX=4 nF
   
Surround Insert I/O  
Output Stage Type: Hardwired connection to processor
  input connector
Input Stage Type: Hardwired connection to DataPort
  output connector
   
Monitor Speaker  
Dimensions: 4-inch full range driver
Amplifier Output Power: 10 watt class AB amplifier
Frequency Response: 100 Hz-8 kHz (±2 dB)
Dynamic Processing: 1.5:1 compression
   

BAY AREA CINEMA PRODUCTS
1025 Pine Meadows Ct., Martinez, California 94553 Phone: 925-372-7603 Fax: 925-372-7658
E-Mail: BACP2000@AOL.com Web: www.BACPINC.com