DBC Network
Bridge
A
t the heart of a Digital B Chain system, the
Crown
®
DBC
TM
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 CobraNet
TM
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-
fi ers. The DBC Bridge also provides the necessary
system equalization, which is stored and recalled
via a series of presets for use in both feature fi lm
and alternative content programming.
Specifi cations
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, fl oating-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 fi rmware
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 fi rmware
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 fi lter banks for
each channel (up to 256 fi lters)
• 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 specifi cations
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 fl ashes 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.
