Crown Network Bridge - Manual

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.