Crown Audio Network Bridge specifications Specifications, Features, Performance

DBC Network Bridge

t the heart of a Digital B Chain system, the ACrown® 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.

Features

• Accepts 8 inputs (7.1 surround) via one of the	• Studio-grade DSP with multiple filter banks for
following formats:	each channel (up to 256 filters)
Analog	• 32 presets, 32 scenes, and 32 events can be
AES/EBU	stored, labeled, and recalled
CobraNet	• Analog monitoring of cinema processor inputs,
• Selectable mic or line auxiliary analog XLR
	pre-amp, or post-amp signals
inputs for alternative content	• Multiple-function control port for third-party
• Primary and Secondary 100mb Ethernet
	automation/control
“Single-Click” connection for DBC network	• Internal clock/calendar for scheduling events
• Front-panel LCD display and control functions
	• Auto leveling functions for dynamic volume
of internal presets and system setup
	control of auditoriums or lobby
• Full 32-channel CobraNet digital audio trans-
	• Ambient leveling functions for maintaining
mit/receive capability
	maximum signal-to-noise ratio
• Enhanced matrix mixer capable of full 8x32
	• Three-year, No-Fault, Fully Transferable War-
crosspoint matrix mixing
	ranty completely protects your investment and
• 24-bit/48 kHz converters
	guarantees its specifications

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.

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.

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.