Crown Network Bridge User manual

DBC Network
Bridge
At the heart of a Digital B Chain system, the
Crown® DBCTM Bridge allows you to distrib-
ute multiple channels of digital audio over
standard fast Ethernet hardware and cabling for
use in traditional, e-cinema and d-cinema applica-
tions.
The DBC Bridge accepts standard analog and/or
AES digital audio and CobraNetTM digital channels
from other Cinema processors (Dolby®, DTS®),
Cinema Servers, or Alternative Content Media
Players; and bridges (routes) them to a Crown
DBC network.
This network is Crown’s proprietary “Single-Click”
solution that provides system control, monitoring,
and digital audio transport. The DBC network (fed
by the DBC Bridge) distributes the digital audio
and system-wide control protocol to Crown ampli-
fiers. The DBC Bridge also provides the necessary
system equalization, which is stored and recalled
via a series of presets for use in both feature film
and alternative content programming.
Specifications
Performance
Dynamic Range: >108 dB (A-weighted, 20 Hz-20
kHz).
Digital Sampling: 24-bit, 48 kHz.
Frequency Response: ± 0.5 dB, 20 Hz-20 kHz.
Total Harmonic Distortion: <0.05% THD+N
(1 kHz, 0 dBu).
Common Mode Rejection: 50 dB at 60 Hz (typi-
cal).
Maximum Input Level: +32 dBu (line) or +7 dBu
(mic).
Maximum Output Level: +20 dBu.
Required AC Mains: Universal AC input. Oper-
ates from 100 VAC to 240 VAC at 50/60 Hz, 24W
nominal.
AC Line Connector: 15A IEC AC power inlet.
Latency (analog, digital inputs): Analog: 1.13
mS. Digital: 2.28 mS at 48 kHz.
A/D, D/A Converters: 24-bit 96 kHz Cirrus Logic
Digital Input: AES/EBU, 24-bit, 32-96 kHz.
Onboard sample rate converter.
Network: Onboard TCP/IQ, compatible with stan-
dard 100Mb Ethernet hardware
DSP: 24-bit conversion with 32-bit, floating-point
DSP processing.
Analog Auxiliary Input Gain Range: +20 dB to
–12 dB (add 25 dB for mic setting)
Input Impedance: 20 kilohms balanced, 10
kilohms unbalanced.
Input Display: An eight-segment LED display
matrix shows input signal presence for all eight
analog or digital inputs.
Output Display: An eight-segment LED display
matrix show output signals for all eight surround
channels.
LCD Control Screen: LCD digital display shows
information about the currently selected IQ
address, inputs, presets, scenes, and firmware
information.
Next/Previous Buttons: These two buttons scroll
through parameters in each menu.
Menu/Select Button: Scrolls through the menus of
IQ address, inputs, presets, scenes, and firmware
information. Also used to select a parameter that
is found by the Next/Prev buttons.
Back Panel Controls, Indicators and Con-
nectors
Analog Audio Input: DB25 female connector
accepts eight balanced analog line-level analog
inputs. Pinout matches Dolby CP-650 analog
output.
AES/EBU Digital Audio Input: DB25 female con-
nector accepts eight AES3 digital audio signals.
Pinout matches Dolby #778 AES input/output card
for CP-650.
Aux Inputs: 2 female XLR balanced inputs for
speech reinforcement or announcements. Switch-
able between mic, line, and mic with phantom
power.
Features
• Accepts 8 inputs (7.1 surround) via one of the
following formats:
Analog
AES/EBU
CobraNet
• Selectable mic or line auxiliary analog XLR
inputs for alternative content
• Primary and Secondary 100mb Ethernet
“Single-Click” connection for DBC network
• Front-panel LCD display and control functions
of internal presets and system setup
• Full 32-channel CobraNet digital audio trans-
mit/receive capability
• Enhanced matrix mixer capable of full 8x32
crosspoint matrix mixing
• 24-bit/48 kHz converters
• Studio-grade DSP with multiple filter banks for
each channel (up to 256 filters)
• 32 presets, 32 scenes, and 32 events can be
stored, labeled, and recalled
• Analog monitoring of cinema processor inputs,
pre-amp, or post-amp signals
• Multiple-function control port for third-party
automation/control
• Internal clock/calendar for scheduling events
• Auto leveling functions for dynamic volume
control of auditoriums or lobby
• Ambient leveling functions for maintaining
maximum signal-to-noise ratio
• Three-year, No-Fault, Fully Transferable War-
ranty completely protects your investment and
guarantees its specifications
Output Impedance: 100 ohms balanced, 50 ohms
unbalanced.
Digital Sampling: 24-bit, 48 kHz.
Crosstalk: > 80 dB at 10 kHz.
Required AC Mains: Universal AC input. Oper-
ates from 100 VAC to 240 VAC at 50/60 Hz, 24W
nominal.
AC Line Connector: 15A IEC AC power inlet.
Control Port
Power Supply: +5 VDC and +10 VDC output. Total
output current 1A.
Monitor Output Logic Low: < 0.1V
Monitor Output Logic High: 10 V (via internal pull-
up). Output current limited to 10 mA max per pin.
Input Impedance: > 50 kilohms
Input Logic Low: < 0.5 V
Input Logic High: > 5V
Input Analog Range: 0 to 10 V (for inputs 9-16
only)
Max. Input Voltage: 25 V
Front Panel Controls and Indicators
Power Indicator: Blue LED shows that the unit is
plugged in and AC power is being supplied. The
unit does not have a power on/off switch.
Data Indicator: Amber LED flashes when com-
mands addressed to the DBC Bridge are received.
AES/EBU Indicator: Amber LED illuminates when
the unit is switched to AES digital inputs.

Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
7/05 137854-1E
Specifications subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown, Crown Audio, and IQ are registered trademarks of
Crown International. Other trademarks are the property of
their respective owners. Printed in U.S.A.
© 2005 Crown Audio®, Inc.
DBC Network
Bridge
Crown’s Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown amplifier—an unsurpassed
industry standard. With this unprecedented No-Fault protection, your new Crown amplifier is warranted to meet or
exceed original specifications for the first three years of ownership. During this time, if your amplifier fails, or does not
perform to original specifications, it will be repaired or replaced at our expense. About the only things not covered by
this warranty are those losses normally covered by insurance and those caused by intentional abuse. And the coverage
is transferable, should you sell your amplifier.
See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the USA, please
contact your authorized Crown distributor for warranty information or call 574-294-8200.
DBC Network Bridge back panel
DBC Network Bridge — Cinema Surround Signal Path Window
Network Connectors: Two RJ45 connectors for
primary and secondary network connections.
Supports TCP/IQ communications with CobraNet
digital audio channels.
Multifunction Control Port: One DB37M for analog
inputs, digital inputs, +5VDC, +10VDC and ground.
8 input-switch closures, 8 analog 0-10VDC inputs,
16 output contact closures, +10VDC power source
(1A), GND (1A+).
Monitor Out Connector: 3-pin Phoenix-type
connector supplies a balanced analog line-level
output signal which can feed a powered monitor
loudspeaker.
Construction
Cooling: Convection cooled, no vents, no fans
Dimensions: 19 in. (48.3 cm)W x 1.75 in.
(4.4 cm) H x 16 in. (40.6 cm) D
Net Weight: 15.3 lbs (6.9 kg)