Crown Network Hardware 137769 3 User Manual
DBC Network Bridge  
Operation Manual  
Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your  
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.  
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible  
situation which may arise during installation, operation or maintenance.  
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have  
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.  
Trademark Notice: Crown, Crown Audio, IQ, IQ System, and Amcron are registered trademarks of Crown International. DBC, IQwic  
and TCP/IQ are trademarks of Crown International. Other trademarks are the property of their respective owners.  
Some models may be exported under the name Amcron.®  
©2008 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000  
137769-3  
2/08  
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DBC Network Bridge  
Crown International, Inc.  
DECLARATION of CONFORMITY  
Sue Whitfield  
FOR COMPLIANCE QUESTIONS ONLY:  
ISSUED BY: Crown International, Inc.  
574-294-8289  
1718 W. Mishawaka Road  
[email protected]  
Elkhart, Indiana 46517 U.S.A.  
European Representative's Name and Address:  
Nick Owen  
35, Bassets Field  
Thornhill  
Cardiff. South Glamorgen  
CF14 9UG United Kingdom  
Equipment Type: Digital B-Chain  
Family Name: IQ System Component  
Model Names: DBC Network Bridge  
EMC Standards:  
EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions  
EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm  
EN 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16 A per phase)  
EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current less than or equal to16A  
EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class A  
EN 55103-2:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity  
EN 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)  
EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)  
EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B)  
EN 61000-4-5:2001 Surge Immunity (Criteria B)  
EN 61000-4-6:2003 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)  
EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation  
Safety Standard:  
IEC 60065: 2002 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus  
I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.  
Signed  
Date of Issue: Dec. 1, 2004  
Larry Coburn  
Title: Senior Vice President of Manufacturing  
Operation Manual  
page 3  
Due to line current harmonics, we recommend that you contact your supply authority before connection.  
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DBC Network Bridge  
1 Getting Started With the DBC Network Bridge  
Welcome! This Quick-start guide will get you up and running  
in a short time. Then please refer to the rest of the manual for  
details on the DBC™ Network Bridge and its operation.  
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IMPORTANT: Unplug power cord from AC outlet  
before wiring.  
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1.1 Hardware Installation  
You will need:  
•
Crown power amplifiers with USP3-CN PIP modules  
installed, or Crown I-Tech CobraNet- version power  
amplifiers  
•
•
•
A computer running IQwic software  
A 100Mb network switch  
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An Ethernet cable (RJ45 connector on each end) for  
use between the computer and network switch  
Two Ethernet cables for use between the DBC Network  
Bridge and the network switch. One cable is sufficient,  
but two allow redundancy.  
An Ethernet cable between the network switch and  
each USP3-CN module (or Ethernet connector)  
installed in a Crown power amplifier.  
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%THERNET 3WITCH  
3CREEN #HANNELS AND 3UBWOOFERS  
3URROUND #HANNELS  
1.1.1 Audio and Network Connections  
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Please refer to Figures 1.1 and 1.2.  
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1. Mount the DBC Network Bridge in a standard 19-inch  
(48.3-cm) equipment rack or cabinet.  
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%THERNET 3WITCH  
2. Turn off all equipment that will connect to the unit.  
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3. Connect the AES/EBU digital output signal from your cin-  
ema processor, media player, or feature server to the analog  
DB25 connector on the back of the DBC Bridge. DB25 wiring  
is shown in Table 1 on the next page. Alternatively, connect  
the analog output signal from your cinema processor to the  
Analog DB25 connector on the back of the DBC Bridge.  
DB25 wiring is shown in Table 2 on the next page.  
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4. See Figure 1.2. Connect any auxiliary mic or line signals  
to the female XLR Auxiliary Inputs on the back of the DBC  
Network Bridge. Set the MLP switch for Mic, Line, or Phan-  
tom-powered mic. Adjust gain potentiometers to optimize  
gain structure.  
XLR connector wiring:  
pin 1: shield  
pin 2: signal hot  
pin 3: signal cold  
Figure 1.1 System Wiring  
Figure 1.2 Audio Inputs on the Back Panel of the DBC Bridge  
page 4  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
Table 1  
Table 2  
DBC DB25F DIGITAL AES/EBU PINOUTS  
DBC DB25F ANALOG PINOUTS  
13  
25  
1
13  
25  
1
14  
14  
PIN  
FUNCTION  
N/C  
PIN  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
FUNCTION  
GND  
PIN  
FUNCTION  
GND  
L+  
PIN  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
FUNCTION  
1
2
1
2
L–  
N/C  
AES1 (L/R)–  
GND  
BSL+  
C–  
3
N/C  
AES3 (Ls/Rs)–  
3
BSL–  
GND  
C+  
4
N/C  
N/C  
GND  
N/C  
N/C  
4
5
N/C  
5
GND  
BSR+  
R–  
6
N/C  
6
BSR–  
GND  
R+  
7
AES1 (L/R)+  
AES3 (Ls/Rs)+  
GND  
7
8
AES4 (Bsl/Bsr)–  
AES4 (Bsl/Bsr)+  
AES2 (C/SW)–  
AES2 (C/SW)+  
GND  
8
N/C  
9
9
GND  
Ls–  
GND  
Ls+  
10  
11  
12  
13  
N/C  
10  
11  
12  
13  
GND  
Rs–  
Rs+  
SW+  
N/C  
SW–  
GND  
N/C  
Operation Manual  
page 5  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
1.2.3 TCP/IQ Addressing Rules  
1.2 Communicating with the DBC Network  
Bridge: TCP/IQ™ Networking  
In the next section, you will be assigning TCP/IP addresses to  
the devices in your network. When you do so, be sure to follow  
the addressing rules below. Otherwise, the computer may not  
communicate with the devices.  
1.2.1 The Network Wizard  
If you are setting up a dedicated audio network that is not part of  
another network, you can use the Network Wizard to set up your  
network easily.  
1. Open IQwic.  
2. Select Setup > Network Wizard.  
Turn off DHCP (automatic addressing). This will be done in  
Instruction 1C, described later.  
3. Follow the instructions on the screen.  
4. When done, skip to Step 4 on page 11.  
Assign each device a static (fixed) IP address. An IP address is  
made of four numbers separated by periods. Each number can be  
zero to 255. The last number can never be a zero or 255. For  
example, 126.126.17.1 could be an IP address. 126.126.17.0  
would not be a valid IP address.  
1.2.2 Introduction  
The DBC Network Bridge connects directly to Crown IQ networks  
with TCP/IQ protocol. This permits extensive amp and speaker  
diagnostics and control by computer. The DSP functions in the  
DBC Network Bridge are controlled and monitored by a computer  
running IQwic software.  
Make sure that the computer and all the devices have the same  
NETWORK IDs in their addresses. This tells the computer that all  
those devices are on the same network. Various tools are avail-  
able to determine whether devices are on the same network. In  
TCP/IQ utility described later, if items are NOT on the same net-  
work, they are highlighted in the list.  
The computer connects to the DBC Network Bridge on a TCP/IQ  
network via a Category 5 cable plugged into the Primary Network  
connector on the back of the DBC Network Bridge. The TCP/IQ  
format uses off-the-shelf, fast (100 Mb) Ethernet connections.  
CobraNet lets you plug in a single cable for both networking and  
digital audio -- this is Crown’s Single-Click solution.  
Make sure that each component has its own TCP/IP address, and  
there are no duplicate addresses. The same holds true for IQ  
addresses.  
Every component in a TCP/IQ network is identified by a unique  
address.  
Assign a subnet mask. Make it the same for all devices on the  
network. If the network you are assembling will interconnect with  
other networks, your network is considered to be a subnet within  
the larger network. Check with the network administrator to  
determine the proper Subnet Mask for your subnet.  
If you have a stand-alone network, set the Subnet Mask to  
255.255.0.0 for all components, including the computer.  
Note: Just because two components have the same subnet mask  
does not mean that they are on the same network. As we said, the  
subnet mask just tells what part of the TCP/IP address is the Net-  
work ID.  
page 6  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
1. Turn on your computer and the rest of the system equipment. On your computer desk-  
top, select Start > Settings > Control Panel > Network Connections (Figure 1.3). Set a static  
TCP/IP address and Subnet mask on the master computer. Document the address and  
mask.  
1.2.4 TCP/IQ Setup  
This example is based on a stand-alone system using switches and routers. The screen  
captures were done in Windows 2000; your exact configuration may vary. If your computer  
uses a network for other applications, please check with your Information Technology  
Department before making any changes. Section 1.2.5 includes a helpful worksheet for  
assigning addresses.  
Figure 1.3 Selecting Settings > Control Panel  
1A. Right-click on LAN Connections. Then select Internal > Properties (Figure 1.4).  
Figure 1.4  
Result of Clicking LAN Connections > Internal  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
1B. Once the Properties window opens (Figure 1.5), click on Internet Protocol (TCP/IP).  
1C. We recommend that you uncheck “Obtain an IP address automatically”, and check  
“Use the following address.” If you decide to set an IP address manually, specify an IP  
address. The IP address is four numbers between 1 and 255 separated by periods. For  
example, 126.126.0.1.  
Select a subnet mask. The subnet mask is four numbers between 1 and 255 separated by  
periods. For example, 255.255.0.0.  
1D. Click OK and close the Control Panel. At this point, some computer operating systems  
will require a restart.  
126 126  
255 255  
0
1
0
0
Figure 1.5 Internal Properties Window  
The Internet Protocol (TCP/IQ) Properties window appears (Figure 1.6). Dis-  
able Virtual Private Network or other encryption settings.  
See Section 1.2.5, TCP/IQ Addressing Worksheet, on the next page. Open  
the supplied Excel worksheet called IQ Worksheet.XLS.  
Figure 1.6 Internet Protocol (TCP/IP) Properties Window  
page 8  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
Table 3  
1.2.5 TCP/IQ Addressing Worksheet  
EXAMPLE OF AN IQ ADDRESSING WORKSHEET  
Table 3 is an example of valid TCP/IP addresses on a stand-alone network. If the TCP/IQ  
network is going to be shared with other people, check with the Network Administrator for  
their addressing scheme. Without getting into all of the networking rules, the table lists  
approximately 20 network addresses out of a possible 65,534 addresses on this network.  
There are other addresses that are valid; these are just shown as a starting point.  
ADDRESS  
126.126.0.1  
126.126.0.2  
126.126.0.3  
126.126.0.4  
126.126.0.5  
126.126.0.6  
126.126.0.7  
126.126.0.8  
126.126.0.9  
126.126.0.10  
126.126.0.11  
126.126.0.12  
126.126.0.13  
126.126.0.14  
126.126.0.15  
126.126.0.16  
126.126.0.17  
126.126.0.18  
126.126.0.19  
126.126.0.20  
IQ ADDRESS  
MODEL  
DESCRIPTION  
COMPUTER  
CHANNEL 1  
CHANNEL 2  
2
I-T8000 #1  
RACK ROOM  
LEFT CLUSTER RIGHT CLUSTER  
• The Subnet Mask for all components, including the computer, needs to be set to  
255.255.0.0.  
• Each computer running IQwic software must have a subnet mask of 255.255.0.0. It also  
must be assigned one of the addresses listed on the following table.  
• A space has been left to the right of all the addresses. This area is for your notes, such as  
the IQ address or the component type.  
In the CD-ROM that came with your DBC Network Bridge is an Excel spreadsheet that you  
can use to keep track of TCP/IQ addresses.  
Operation Manual  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
2B. Once TCP/IQ Utility has launched, select a single component and click on Set  
Address. In the Set Address window (Figure 1.9), set up a TCP/IQ address—it must be  
unique. Then set up the same Subnet mask for all of the components as well as the master  
computer. Set the IQ address, and select Send Code.  
2. Select IQ Systems > IQwic > TCPIQ Utility (Figure 1.7). This launches the TCPIQ Utility  
on the master computer.  
2C. Close the software. Repeat as necessary.  
Figure 1.7 Selecting IQ Systems > IQwic > TCPIQ Utility  
2A. The master computer should discover the TCP/IQ products (Figure 1.8). If not, please  
re-read Section 1.2.4 on addressing rules. Also read Chapter 6, Troubleshooting.  
Figure 1.9 Set Address Window  
3. Launch the IQwic program. (Figure 1.10).  
Figure 1.8 Example of Discovered Components  
Figure 1.10 Selecting IQ Systems > IQwic  
page 10  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
4. The Component Discovery screen appears and displays the mes-  
sage, “Searching for TCP/IQ components” (Figure 1.11).  
5. The IQwic toolbar and Workspace appear. An icon of the DBC Net-  
work Bridge appears in the Workspace (Figure 1.12)  
Figure 1.12 The IQwic Toolbar (Top)  
and Workspace (Bottom)  
6. Double-click the DBC Network Bridge Icon. The Input-Output  
window appears (Figure 1.13).  
Figure 1.13 The  
Input-Output  
Window  
Figure 1.11 The Discovery Screen  
7. Click on the yellow Expand/Shrink bar at  
the bottom of the Input-Output window.  
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DBC Network Bridge  
Getting Started With the DBC Network Bridge  
8. The processing functions appear. Click on the Unit  
Presets tab at the top. The Unit Presets window appears  
(Figure 1.14).  
9. At the bottom right, select Preset 32, Standard Cinema.  
Then select Recall this Preset. Your system is running  
and ready to configure. Please continue reading the man-  
ual.  
If there are problems, please re-read Section 1.2.3 on  
addressing rules. Also read Chapter 6, Troubleshooting.  
Figure 1.14 The Unit Presets Window  
page 12  
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DBC Network Bridge  
Table of Contents  
Important Safety Instructions ........................................................... 2  
Declaration of Conformity................................................................. 3  
1 Getting Started with the DBC Network Bridge .................... 4  
1.1 Hardware Installation ............................................................ 4  
1.1.1 Audio and Network Connections.................................. 4  
1.2 Communicating with the DBC Network Bridge...................... 6  
1.2.1 The Network Wizard..................................................... 6  
1.2.2 Introduction ................................................................. 6  
1.2.3 TCP/IQ Addressing Rules ............................................ 6  
1.2.4 TCP/IQ Setup............................................................... 7  
1.2.5 TCP/IQ Addressing Worksheet..................................... 9  
Table of Contents.............................................................................. 13  
2 Welcome ....................................................... 14  
2.1 Features ............................................................................... 14  
2.2 How to Use This Manual....................................................... 14  
Sample Application Diagram ............................................................ 15  
3 Setup ............................................................ 16  
3.1 Unpack and Install Your DBC Network Bridge ..................... 16  
3.2 Connecting to AC Mains ...................................................... 16  
3.3 Wiring................................................................................... 17  
3.3.1 Analog, Digital and Auxiliary Inputs............................. 17  
3.3.2 Balanced Input Wiring ................................................. 18  
3.3.3 Unbalanced Input Wiring ............................................. 18  
3.3.4 Balanced Monitor Output Wiring ................................. 18  
3.3.5 Unbalanced Monitor Output Wiring ............................. 19  
3.3.6 CobraNet Connections................................................. 19  
3.3.7 Control Port Connections ............................................ 19  
4 Operation ....................................................... 20  
4.1 Front Panel Controls and Indicators...................................... 20  
4.2 Back Panel Controls and Connectors ................................... 21  
4.3 Navigating the LCD Control Screen ...................................... 22  
4.3.1 Functions, Controls and Screens................................. 22  
4.3.2 Operation Examples..................................................... 23  
4.3.3 Menu Tree.................................................................... 23  
4.4 IQwic Overview .................................................................... 24  
4.5 Metering ............................................................................... 25  
4.6 General Tab........................................................................... 26  
4.7 Basic Processing Functions.................................................. 27  
4.7.1 Signal Path Tab, Cinema Surround Form..................... 27  
4.7.2 Input Compressor........................................................ 28  
4.7.3 Input Delay................................................................... 29  
4.7.4 EQ Filters .................................................................... 30  
4.7.5 All Outputs Volume Controls ....................................... 32  
4.7.6 Signal Generator .......................................................... 33  
4.7.7 CobraNet: Explanation ................................................. 34  
4.7.8 Cobranet: Output.......................................................... 35  
4.7.9 Booth Monitor Source Select....................................... 36  
4.7.10 Presets....................................................................... 37  
4.7.11 Preset Editor .............................................................. 38  
4.7.12 Scenes........................................................................39  
4.7.13 Scene Editor ...............................................................40  
4.7.14 Events Scheduler........................................................41  
4.8 General Firmware Features....................................................43  
4.8.1 Input Level Meters........................................................43  
4.8.2 Input Dynamic Cut/Boost Meters..................................43  
4.8.3 Output Level Meters .....................................................43  
4.8.4 Output Dynamic Cut/Boost Meters...............................43  
4.8.5 Memory Backup ...........................................................43  
4.8.6 Presets .........................................................................43  
4.8.7 Real Time Clock ...........................................................43  
4.8.8 Events...........................................................................43  
5 Advanced Operation ........................................... 44  
5.1 Advanced Operation Table of Contents ..................................44  
5.2 Advanced Functions ..............................................................45  
5.3 Advanced Form Firmware Features........................................54  
5.4 Technical Description ............................................................69  
6 Troubleshooting ................................................ 70  
7 Specifications .................................................. 73  
8 Appendix A: TCP/IQ Network Basics......................... 75  
9 Service........................................................... 80  
10 Warranty ....................................................... 81  
Crown Audio Factory Service Information Form ............ 83  
Operation Manual  
page 13  
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DBC Network Bridge  
2.1 Features  
• Internal clock/calendar for scheduling events  
2 Welcome  
• Accepts 8 inputs (7.1 surround) via one of  
the following formats:  
• Auto-leveling functions for dynamic volume  
control of auditoriums or lobby  
At the heart of a Digital B Chain system, the  
Crown® DBC Network Bridge allows you to  
distribute multiple channels of digital audio  
over standard fast Ethernet hardware and  
cabling for use in traditional, e-cinema and d-  
cinema applications.  
Analog  
AES/EBU  
CobraNet  
• Ambient-leveling functions for maintaining  
maximum signal-to-noise ratio  
• Three-year, no-fault, fully transferable war-  
ranty  
• Selectable mic, mic with 24V phantom  
power, or line analog XLR inputs for alternative  
content  
2.2 How to Use This Manual  
The DBC Bridge accepts standard analog and/  
or AES digital audio and CobraNet® digital  
channels from other Cinema processors  
(Dolby®, DTS®), Cinema Servers, or Alterna-  
tive Content Media Players; and bridges  
(routes) them to a Crown DBC network. Figure  
2.1 is a sample application drawing.  
This manual provides you with the necessary  
information to safely and correctly setup and  
operate your DBC Network Bridge. It does not  
cover every aspect of installation, setup or  
operation that might occur under every condi-  
tion. For additional information, please consult  
Crown’s DBC Bridge Application Guide (avail-  
able online at www.crownaudio.com), Crown  
Technical Support, your system installer or  
retailer.  
• Primary and Secondary 100 Mb Ethernet  
“Single-Click” connection for DBC network  
• Front-panel LCD display and control func-  
tions of internal presets and system setup  
• Full 32-channel CobraNet digital audio  
transmit/receive capability  
This network is Crown’s proprietary “Single-  
Click” solution that provides system control,  
monitoring, diagnostics, and digital audio  
transport. The DBC network (fed by the DBC  
Network Bridge) distributes the digital audio  
and system-wide control protocol to Crown  
amplifiers. The DBC Network Bridge also pro-  
vides the necessary system equalization, which  
is stored and recalled via a series of presets for  
use in both feature film and alternative content  
programming.  
• Enhanced matrix mixer capable of full 8x32  
crosspoint matrix mixing  
• 24-bit/48 kHz converters  
We strongly recommend you read all instruc-  
tions, warnings and cautions contained in this  
manual. Also, for your protection, please send  
in your warranty registration card today. And  
save your bill of sale — it’s your official proof  
of purchase.  
• 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  
page 14  
Operation Manual  
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DBC Network Bridge  
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Figure 2.1 Sample Application: Large Cinema System Diagram  
Operation Manual  
page 15  
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DBC Network Bridge  
3 Setup  
CAUTION: Before you begin, make sure  
your DBC Network Bridge is discon-  
nected from the power source.  
3.1 Unpack and Install Your  
DBC Network Bridge  
Please unpack and inspect your product for any  
damage that may have occurred during transit.  
If damage is found, notify the transportation  
company immediately. Only you can initiate a  
claim for shipping damage. Crown will be  
happy to help as needed. Save the shipping  
carton as evidence of damage for the shipper’s  
inspection.  
Use a standard 19-inch (48.3 cm) equipment  
rack (EIA RS-310B). See Figure 3.1 for dimen-  
sions.  
You may also stack units without using a  
cabinet.  
NOTE: When transporting, units should be sup-  
ported at both front and back.  
We also recommend that you save all packing  
materials so you will have them if you ever  
need to transport the unit. Never ship the  
unit without the factory pack.  
3.2 Connecting to AC Mains  
WARNING: The third (ground) prong of  
the AC power cord connector is a  
required safety feature. Do not attempt  
to disable this ground connection by  
using an adapter or other methods.  
YOU WILL NEED (not supplied):  
•
•
•
Input wiring cables  
Network cables  
Rack for mounting the DBC Network  
Bridge (or a stable surface for stacking)  
WARNING: Before you start to set up  
your DBC Network Bridge, make sure  
you read and observe the Important  
Safety Instructions found at the begin-  
ning of this manual.  
Figure 3.1 Dimensions  
page 16  
Operation Manual  
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DBC Network Bridge  
3 Setup  
3.3 Wiring  
Chapter 1 describes how to make connections to the DBC Network Bridge.  
The information below describes the connections in detail.  
3.3.1 Analog, Digital and Auxiliary Inputs  
Analog Line Input: DB25 female connector accepts eight balanced ana-  
log line-level analog inputs. Pinout matches Dolby CP-650 analog output.  
See Table 2 on page 5.  
Figure 3.2 Aux Input Level Controls, XLR connectors and  
Mic/Line/Phantom Slide Switch  
Digital Audio Input: DB25 female connector accepts eight AES3 digital  
audio signals. Pinout matches Dolby #778 AES input/output card for CP-  
650. See Table 1 on page 5.  
Auxiliary Inputs: Two female XLR balanced inputs for speech reinforce-  
ment or announcements (see Figure 3.2).  
Each input has an input selector switch.  
• Slide it to the left (M) for microphone signal levels up to +7dBu  
(0dBu = 0.775 volts).  
• Select the center position (L) for line-level signals up to +20  
dBu.  
Pro Audio Equip-  
ment  
Semi-Pro or con-  
sumer equipment  
Dynamic mic,  
speech  
Condenser mic,  
speech  
Hot condenser  
mic, speech  
• Slide it to the right (P) to provide 24VDC to mics requiring  
phantom power.  
dBm/dBV  
(nominal)  
+4 dBm  
–10 dBV  
–75 dBV  
–65 dBV  
–45 dBV  
dBu (nominal)  
+4 dBu  
–4 (L)  
–8 dBu  
+8 (L)  
–73 dBu  
+20 (M)  
–63 dBu  
+18 (P)  
–43 dBu  
+11 (P)  
Each input has a screwdriver-set, calibrated gain control to compensate for  
different input source levels. The slot on the control shaft points to the gain  
setting. The settings are labeled for line-level input. Add 25 dB to the scale  
if the inputs are switched for microphone level signals.  
Suggested Setting  
Table 4. Suggested Audio Input Gain Control Settings  
Use a screwdriver to adjust the gain pot so that the input signal level plus  
gain equals roughly 0dBu. You will need to know, or estimate, the level of  
the input source. Setting the source signal level to approximately 0dBu will  
provide 20dBu of headroom in the input preamp. Some recommended set-  
tings are given in Table 4.  
0 dBm = 0.775 Vrms with a 600-ohm load.  
0 dBV = 1 Vrms.  
0 dBu = 0.775 Vrms.  
Operation Manual  
page 17  
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DBC Network Bridge  
3 Setup  
3.3.3 Unbalanced Input Wiring  
3.3.2 Balanced Input Wiring  
3.3.4 Balanced Monitor Output Wiring  
Unbalanced sources should be wired as shown below. The examples are grouped  
according to whether you use twin-lead shielded wire or single-lead coax (or  
twisted pair).  
Balanced sources should be wired as shown below. Notice that the  
shield is not connected to the chassis ground of the source if the  
source is also connected to the AC ground (that is, it has a grounded  
AC plug). This prevents unwanted ground loops.  
Balanced Monitor Output wiring is shown in Figures 3.5. Notice  
that if the load is connected to AC ground, the shield should not  
be connected to the output ground terminal. This will prevent  
unwanted ground loops.  
1. Assemble a 2-conductor shielded cable with a Phoenix-type 3-  
terminal connector on one end. On the other end, solder a con-  
nector that mates with your booth monitor amplifier/speaker.  
2. Plug the Phoenix-type connector into the Monitor Output con-  
nector on the back of the DBC Network Bridge.  
3
3. Plug the other end of the cable into your booth monitor ampli-  
fier/speaker.  
1
2
2
1
2
1
1
1
3
3
–
–
S
2
1
2
3
3
TO MONITOR AMP/SPEAKER  
2
2
1
3
3
Figure 3.3 Balanced Audio Input Wiring  
2
1
Figure 3.4 Unbalanced Audio Input Wiring  
3
Figure 3.5 Balanced Monitor Output Connections  
page 18  
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DBC Network Bridge  
3 Setup  
3.3.6 CobraNet Connections  
3.3.5 Unbalanced Monitor Output Wiring  
3.3.7 Control Port Connections  
The CobraNet network carries up to 32 channels of audio bidirectionally  
via a single cable. Connect the DBC Network Bridge to the CobraNet net-  
work using RJ45-terminated standard CAT 5 cable from the PRIMARY con-  
nector on the rear of the unit.  
Connect any external circuits you plan to use to control and/or monitor the  
DBC Network Bridge via the Control Port. Figure 3.7 shows pin assign-  
ments for the Control Port. See the Control Port (Section 5.2.4) for infor-  
mation on the operation of the Control Port, and for examples of wiring  
circuits to the Control Port connector.  
The PRIMARY connection can either be connected to another DBC Network  
Bridge unit or other CobraNet-compatible component’s PRIMARY port. A  
further option is to connect to a port on a 100Mbit Ethernet switch or hub  
in order to distribute the network audio to other devices. Devices that are to  
communicate with the DBC Network Bridge will all need unique Ethernet IP  
addresses assigned. See the CobraNet sections 4.7.8 and 8.3 for more  
details.  
DBC Network Bridge Control Port (DB37)  
The SECONDARY connector is for creating a redundant network for backup  
purposes. This port should be tied to the backup Ethernet network. In the  
event of a failure in the cabling or hardware connected to the PRIMARY  
system the DBC Network Bridge will switch to the SECONDARY network in  
a matter of seconds.  
On each connector are two LEDs. The left LED (IN USE/CONDUCTOR)  
lights yellow when the port is in use and will blink if the device is also the  
conductor (the CobraNet timing master). The right LED (LINK/ACTIVITY)  
lights green when link is established and blinks when network activity is  
detected. Both LEDs flash yellow in unison to report a fatal error. The Sec-  
ondary Connector has identical LEDs as the Primary Connector.  
Figure 3.6 Unbalanced Monitor Output Connections  
Figure 3.7 Control Port Pin Assignment  
Pins 1 through 8 are assignable to manually select a binary (on/off) value,  
chosen Preset status, or status of any logical binary control or sensor  
(most likely gate and Preset).  
Pins 20 through 27 provide an analog output from 0 to +10VDC that is  
assignable or can reflect an object (including faders) of the unit.  
A total of 1 amp of current is available from all outputs.  
Pins 12 through 19 are assignable to logic Preset recall and general con-  
trol for logical type objects within the unit, and are assignable to any com-  
bination of mute controls. Pins 30 through 37 function as analog inputs  
and are assignable to any combination of fader controls.  
Operation Manual  
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DBC Network Bridge  
4 Operation  
D. Menu/Select Button  
4.1 Front Panel Controls  
and Indicators  
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.  
A. LCD Display  
LCD digital display shows information about the  
currently selected IQ address, inputs, presets,  
scenes, and firmware information.  
E., F. Next/Previous Buttons  
These two buttons scroll through parameters in  
each menu.  
B. Input Display  
An eight-segment LED display matrix shows input  
signal presence for all eight analog or digital inputs.  
G. Output display  
An eight-segment LED display matrix shows output  
signals for all eight surround channels.  
C. 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.  
H. Data Indicator  
Amber LED flashes when commands addressed to  
the DBC Bridge are received.  
I. AES/EBU Indicator  
Amber LED illuminates when the unit is switched to  
AES digital inputs.  
Figure 4.1 Front Panel Controls and Indicators  
page 20  
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DBC Network Bridge  
4 Operation  
4.2 Back Panel Controls and Connectors  
Q. Aux Inputs  
M. Secondary Network Connector  
2 female XLR balanced inputs for speech reinforcement or announcements.  
Switchable between mic, line, and mic with phantom power.  
RJ45 connector for secondary (redundant or backup) CobraNet network con-  
nections (100Mbit CAT 5). Supports TCP/IQ communications with CobraNet  
digital audio channels.The SECONDARY connection is similar to the Primary,  
but is active only in case of a fault in the CobraNet network attached to the  
PRIMARY. The secondary LEDs work in the same way as the primary ones.  
J. IEC AC Power Inlet  
Accepts an IEC AC power cord. The DBC Network Bridge has a universal  
power supply, and may be operated on AC line voltages from 100 VAC to 240  
VAC at 50 Hz or 60 Hz.  
R. Monitor Out Connector  
3-pin Phoenix-type connector supplies a balanced analog line-level output  
signal which can feed a powered monitor loudspeaker. This output can be  
switched to monitor:  
N. AES/EBU Digital Audio Input  
K. Multifunction Control Port  
•
•
•
Cinema processor output signals (+20 dBu maximum output level)  
Pre-amp input signals  
Post-amp output signals  
DB25 female connector accepts eight AES3 digital audio signals. Pinout  
matches Dolby #778 AES input/output card for CP-650.  
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+).  
O. Analog Audio Input  
DB25 female connector accepts eight balanced analog line-level analog  
inputs. Pinout matches Dolby CP-650 analog output.  
S. Aux Input Mic/Line/Phantom Switch  
L. Primary Network Connector  
RJ45 connector for primary CobraNet network connections (100Mbit CAT 5).  
Supports TCP/IQ communications with CobraNet digital audio channels.  
Each input has a three-position “M L P” selector switch for mic  
level, line level, or mic level with phantom power.  
• Select the M position for microphone signal levels up to  
+7dBu (0 dbu = 0.775 volt).  
• Select the L position for line level signals up to +32 dBu  
• Select the P position for mic inputs that require +24 VDC phantom power.  
P. Aux Input Level Controls  
Screwdriver-set, calibrated gain potentiometer (one per channel) for adjusting  
the input gain to the input signal level. These can be used to compensate for  
different microphone sensitivities. Control range is from –12 dB to +20 dB.  
On the connector are two LEDs (see detail drawing below). The left LED lights  
yellow when the port is in use and will blink if the device is also the conductor  
(the CobraNet timing master device). The right LED lights green when link is  
established and blinks when network activity is detected. Both LEDs flash yel-  
low in unison to report a fatal error.  
Figure 4.2 Back Panel Controls and Connectors  
Operation Manual  
page 21  
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DBC Network Bridge  
4 Operation  
Getting around in the Menu is intuitive. Here are the basic opera-  
tions:  
4.3 Navigating the LCD Control Screen  
4.3.1 Functions, Controls and Screens  
Once the Menu/Select button is released, the Next and Prev  
arrow buttons are used to adjust the parameter. On releasing the  
Menu/Select button, you have two seconds to press the Next  
or Prev button before the display changes back to default. When  
the parameter is adjusted to the desired value, press the Menu/  
Select button to store the setting.  
The LCD Control Screen and its controls let you view and set up  
various parameters in the DBC Network Bridge. Settings made on  
the LCD screen are duplicated in IQwic software, and vice-versa.  
(DSP parameters cannot be adjusted with the LCD Control  
Screen. That is done in IQwic.)  
• Hold the Menu/Select button to cycle through the Preset  
screen, Scene screen, Address screen, Input Board Menu, Firm-  
ware Info screen, and back to the Preset screen.  
• Press Next to go to a higher-numbered Preset, Scene, or  
Input. Presets and Scenes loop around from 1 to 32.  
Internal errors are automatically displayed on the LCD Control  
Screen. If an error is displayed, call Tech Support at Crown and  
provide them the error number.  
• Press Prev to go to a lower-numbered Preset, Scene, or Input.  
Presets and Scenes loop around from 32 back to 1.  
Operation examples and the Menu Tree are on the next page.  
• Press Menu/Select within 2 seconds after pressing Next or  
Prev to make a selection.  
Figure 4.3 LCD Control Screen and Its Controls.  
Left-to-right: Menu/Select Button, Prev Button,  
Next Button, LCD Control Screen  
Preset Screen is used to select Presets.  
Preset 01 Active  
PRESET 1  
Input Board Menu is used to select input signals.  
Figure 4.3 shows the LCD Control Screen and its controls. Its  
functions are described below.  
INPUT BOARD MENU  
Digital/Surround  
Analog/Surround  
Analog Auxiliary  
The LCD Control Screen shows:  
32 Preset numbers  
32 Scene numbers  
Scene Screen is used to select Scenes.  
Analog or digital audio input selections  
IQ Address / IP Address/ Subnet Mask/MAC Address  
Firmware Info  
Scene 01 No Data  
SCENE 1  
Errors  
Firmware Info Screen displays the version of the  
Control firmware and SHARC firmware.  
On power-up, the LCD Control Screen displays the Crown logo  
and DBC logo. The screen defaults to the Preset display.  
FIRMWARE INFO  
Control: 1.110  
SHARC:  
2.100  
Address Screen is used to read addresses and subnet mask.  
IQ: 001  
IP: 192.168.001.001  
Sub:255.255.248.000  
MAC:00-60-2B-02-8F-C0  
page 22  
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DBC Network Bridge  
4 Operation  
4.3.2 Operation Examples  
MENU TREE  
Next  
Operation Example 1  
How to select Preset 5 using the LCD Control Screen:  
1. After power-up, the Preset Screen appears.  
2. Press Next until you see Preset 5.  
3. Within 2 seconds, press Menu/Select.  
1
When desired Preset # appears,  
press Menu/Select to select it.  
PRESET SCREEN  
32  
Prev  
Operation Example 2  
How to select the Digital/Surround Input using the LCD Control  
Screen:  
1. After power-up, press and hold Menu/Select until the Input  
Board Menu appears.  
Hold Menu/Select  
SCENE SCREEN  
Next  
1
When desired Scene # appears,  
press Menu/Select to select it.  
2. Press Next until the arrow is by Digital/Surround.  
3. Within 2 seconds, press Menu/Select. Digital/Surround will be  
highlighted, showing that it is selected.  
32  
Prev  
Hold Menu/Select  
Operation Example 3  
How to read the unit’s addresses:  
1. After power-up, press and hold Menu/Select until the Address  
screen appears.  
ADDRESS SCREEN  
Hold Menu/Select  
Next  
4.3.3 Menu Tree  
When arrow is by the desired Input,  
press Menu/Select to select it.  
As a handy reference, Figure 4.4 shows the menu structure of the  
LCD control screen.  
INPUT BOARD MENU  
Prev  
Hold Menu/Select  
FIRMWARE INFO SCREEN  
Hold Menu/Select  
Figure 4.4 Menu Tree of the DBC Network Bridge LCD Control Screen  
Operation Manual  
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DBC Network Bridge  
4 Operation  
4.4 IQwic Overview  
Presets or Scenes can be primed to change at set times or dates using the  
‘Unit Event’ scheduler giving a reasonable degree of flexibility not unlike  
other show controllers. A Preset segue function enables Presets to be  
crossfaded in level for smooth transitions between setups.  
The Upload and Engage options in the Dataframe menu enable a manual  
connection to be made either from the unit in the former case or back to the  
unit in the latter. All the current settings will be either received or sent to the  
DBC Network Bridge. These functions can be used to re-establish commu-  
nication with the unit should the link go down, i.e. the network cable is  
accidentally unplugged.  
This section describes how to set up the DBC Network Bridge from within  
IQwic software. It includes an overview of the various processing functions  
and associated windows.  
IQwic itself can also switch between different setups including combina-  
tions of units wired via the IQ interface. The Dataframe contains all the  
information for all the devices on the IQ network and is saved as a .WIQ file  
on the PC’s hard drive. Different versions of these files that pertain to the  
same hardware setups can then be scheduled to change using the Sched-  
ule function in the File menu and this can even be linked to MIDI Time  
Code using the MTC Scheduler in the Setup menu.  
The DBC Network Bridge is configured using IQwic software. This applica-  
tion enables the setup of all the parameters available to the DSP of the DBC  
Network Bridge unit.  
The Edit Control Pages option allows the construction of ‘custom’ con-  
trol panels to give selective access to particular controls and to represent  
them in a user’s chosen layout with added text and images. IQwic also  
includes some comprehensive error reporting facilities that can be linked  
to a printer or sent out externally via a connected modem to either a fax or  
pager. A .wav audio file alert can even be played through the system! Note  
that at present the error reporting doesn’t include information relating to  
CobraNet installations. Error reporting can be suppressed if necessary -  
this is useful in larger systems where there may be too much generation  
of data.  
PC Requirements  
To run IQwic successfully a 200MHz Pentium II (preferably 400MHz or bet-  
ter) machine with an absolute minimum of 32MB RAM (64MB or more is  
better) is recommended. IQwic will run under Windows 95/98/ME/NT or  
2000 (2000 Pro recommended).  
A further level of control is also available using IQwic Scenes. These are  
not the same as the Unit Scenes that can be set up for the DBC Network  
Bridge alone. These can be scheduled using the Scene Sequencer found in  
the Dataframe menu and are again saved on the PC hard drive (as .SIQ  
files). IQwic Scenes can be organized without any units connected to the  
PC, unlike DBC-Bridge Presets that can only be stored in the unit while the  
program is on-line to the device.  
System Overview  
The DBC Network Bridge is a ‘fixed path’ processing unit. This means that  
the audio signal travels along a set course of DSP objects (software pro-  
cessors). These objects can be switched in or out of the path and in some  
instances matrix routed into other paths. The ‘Signal Path’ tab in the DBC  
Bridge setup window in IQwic displays an overview of the main DSP, input/  
output routing and the various processing objects in them. This is where  
most of the DBC Network Bridge’s DSP configuration is accessed. More  
information about this ‘map’ is available in Section 4.7, Basic Processing  
Functions.  
A security system is implemented using a set of passwords to protect  
almost any aspect of the software’s functionality from unauthorized access  
or alteration. Passwords can be set to secure:  
• Running the IQwic program  
• Creation of new Dataframes/Scenes  
• Access to the current Dataframe  
• Operation/editing of component controls  
• Setup of Scene sequences  
The Administrator mode gives access to all passwords with one single  
password.  
IQwic Notes  
If you use the Cut command from the Edit menu on a DBC Network Bridge  
icon in the Workplace this will not delete the unit but, instead removes all  
the settings back to their defaults. Equally, Copy will put the settings on the  
clipboard for Pasting back into another unit (for example, if you have two  
or more on a network).  
Presets and Scenes  
The basic premise in setting up the DBC Network Bridge is that the unit  
should be configured for a particular use and this setup then stored as a  
Preset in the unit. There are also Scene memories that store just the set-  
tings of up to 50 of the DSP objects but not the configuration of objects.  
All of the settings in the unit can be printed in list format using the File  
menu Print command. This is useful to assess the configuration of the  
device on paper although, note that for a standard DBC Network Bridge the  
printout will run to over 20 pages! Use the ‘Select’ button to choose for  
which unit(s) you wish to print the settings.  
Some passwords are program based, e.g. run program, create new  
Dataframe/Scene and Administrator. The current Dataframe, Component  
controls and Scene sequence passwords are saved with the Dataframe in  
the .WIQ file itself.  
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DBC Network Bridge  
4 Operation  
4.5 Metering  
After you have followed the steps in Chapter 1, IQwic is running, and the  
Input/Output meters window (Figure 4.5) is at the left of the screen. Its features  
are described below.  
1. Output Level Meters  
Audio level meters are provided for each output channel: Left, Right, Center,  
Subwoofer, Surround Left, Surround Right, Back Left, and Back Right. The  
meters sense the audio signal immediately after the audio output processing  
block. Meter range is from –60 to +20 dBu with 0.5 dB resolution.  
Another meter labeled “Monitor” shows the output level at the Monitor Output  
connector.  
2. Input Level Meters  
Audio level peak program meters are provided for each of the input channels:  
Left, Right, Center, etc. The meters sense the digital or analog audio signal,  
and respond with 1.7 millisecond attack and 350 millisecond release. Calibra-  
tion is in dBu when the input is in “line” mode and set at 0 dB. Meter range is  
from –60 to +20 dBu with 0.5 dB resolution.  
1
Figure 4.5  
The Input/Output Level Meter Window  
3. Preset Information  
Last Preset indicates the Preset that is currently displayed. Below that is the  
label associated with that Preset. The Preset can be changed by IQwic, the  
front panel of the unit, by the event scheduler (described later), or by a pro-  
grammed control-port input.  
4. Status Window  
This window shows the current status of the unit and has three modes:  
•
•
•
Active (green): Indicates that the settings of the unit agree with the  
displayed Preset.  
Modified (yellow): Indicates that the settings of the unit are different  
from the displayed Preset.  
Offline (red): Indicates that IQwic is not currently communicating with  
the unit.  
2
5. Expand/Shrink Bar  
Click on this bar to expand the view to see all the processing options. Click it  
again to remove the processing options view.  
4
3
5
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DBC Network Bridge  
4 Operation  
4.6 General Tab  
Click on the Expand/Shrink Bar so that the Setup and Processing Func-  
tions appear. Click on the General tab at the top to view the General win-  
dow (Figure 4.6). Its features are described below.  
1
1. Real Time Clock  
The onboard Real Time Clock tracks day, date, hour, minute and second,  
and may be set to any date and time desired, or to match that of the com-  
puter running IQwic software. The clock is used as a time reference for the  
Events Scheduling feature (described later). Internal capacitor storage  
allows the clock to run for up to 45 days without power being applied to the  
DBC Network Bridge.  
2. Front Panel Control Lock Out  
Activation of this control prevents access to the front panel controls. When  
active, the front panel display will indicate “Lxx” to show that the front panel  
is not accessible. If a front panel control is pressed, the display will show  
“Loc”, reminding the user that the front panel is locked.  
2
3
3. Data  
4
This control allows the user to light the front panel “DATA” LED continu-  
ously. This is handy as a diagnostic tool to show IQ communications to a  
particular unit.  
5
4. LED Display Mode  
Select the mode of the front-panel LED display: input/output signal pres-  
ence or Infinity Pattern. The sixteen LED’s display input signal levels greater  
than –40 dBu. The Infinity Pattern is a diagnostic tool.  
5. User Labels  
The user labels can be used to convey useful information about the unit.  
User label 1 is also displayed in the title bar in IQwic. These labels are at the  
top of the I/O Level Meter window, shown on the previous page.  
126.126.0.1  
6. IP Address / MAC Address  
This display shows the current IP Address and MAC Address of the DBC  
Network Bridge.  
6
255.255.0.0  
Figure 4.6 The General Window  
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DBC Network Bridge  
4 Operation  
4.7 Basic Processing Functions  
This section covers the basic processing functions found in the  
DBC Network Bridge configuration section of IQwic.  
4.7.1 Signal Path Tab, Cinema Surround Form  
1
Click on the Signal Path tab and the Cinema Surround but-  
ton at the top to view the Signal Path window (Figure 4.7). Its  
features are described below.  
1. Cinema Surround / Advanced Buttons  
Selecting Cinema Surround will access the most common  
processing for Cinema Surround systems. Selecting Advanced  
will access the more advanced processing functions. Advanced  
processing is described in Chapter 5. For now, click on Cinema  
Surround.  
3
5
4
2. Per-Channel Signal Processing  
To the right of each output channel are three greyed-out icons.  
They light when turned on within the window for each process.  
From left to right, they are Input Compressor, Input Delay, and EQ  
Filters (described on the next few pages). Clicking on any of  
those three icons for each channel will open its settings window.  
At the far right side is a greyed-out icon. Clicking on it opens the  
All Outputs Level Setting window, described later.  
2
3. DBC Network Channel Assign  
Clicking on this button opens a window for CobraNet Output,  
allowing you to configure your CobraNet digital audio channels  
on the DBC Network.  
4. Input Select  
Click on the input signal that you want to process: AES/EBU,  
Analog, Auxiliary or CobraNet.  
5. Booth Monitor Source Select  
Clicking this button opens a window that lets you select the  
source that feeds the Monitor Output connector on the DBC Net-  
work Bridge.  
6
6. CobraNet Input Graphic  
This is a graphic, not a button, which shows that CobraNet Inputs  
feed into the Booth Monitor Source Select.  
Figure 4.7 Signal Path Window  
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DBC Network Bridge  
4 Operation  
4.7.2 Input Compressor  
To open the Input Compressor window (Figure 4.8), select its icon (shown  
above) in any channel in the Signal Path window.  
The input compressor provides a means for controlling the dynamic range of  
input signals. It is a feed-forward type, which performs the compression after the  
Input Level Meter. The Input Compressor’s effect on input gain is metered by the  
Input Dynamic Cut/Boost Meter.  
Seven parameters control this feature:  
7
1. On/Off  
Turns this feature on or off.  
2. Compression Ratio  
Determines how many dB the input level must change for a 1 dB change in out-  
put level. Dynamic variations in the input signal will be reduced by a factor equal  
to the compression ratio. Control range is 2:1 to 32:1.  
1
3. Threshold  
Specifies the average signal level (after side-chain processing) above which the  
compressor will begin to reduce gain. Control range is from –80 to +20dB in 1  
dB steps.  
4. Soft Knee (Width)  
Sets a range in dB around the actual threshold through which the compressor  
gain is gradually modified from unity to the final compressed gain. Control range  
is from 0 dB to +20 dB in 0.5 dB steps.  
3
4
5. Attack Time  
2
Sets the time required for the Compressor to decrease its gain by 20 dB. Control  
range is from 1.0 to 100 milliseconds in 1 millisecond increments.  
6. Release Time  
Sets the time required for the Compressor to increase its gain by 20 dB. Control  
range is from 0.1 to 10 seconds in 10 millisecond increments.  
5
6
Figure 4.8 Input Compressor Window  
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DBC Network Bridge  
4 Operation  
4.7.3 Input Delay  
To open the Input Delay window (Figure 4.9), select its icon (shown above) in any channel in  
the Signal Path window.  
1
Signal Delay can be set for each output channel. This delay is especially useful in loudspeaker  
array alignment, where the crossovers, mix, and other processing is complete and the loud-  
speaker needs to be aligned to the system. Delay is displayed in milliseconds, feet, and meters.  
Available delay for each output channel is up to 2 seconds in 20 microsecond steps (1/4 inch).  
2
1. Channel Select  
Click on an output channel to adjust its delay.  
2. Delay Settings  
Use the arrow keys or type in the desired settings.  
Delay windows in other parts of the signal path work the same way.  
Figure 4.9 Input Delay Window  
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DBC Network Bridge  
4 Operation  
4.7.4 EQ Filters  
To access the EQ Filters window (Figure 4.10), click on its icon (shown  
above) for any channel in the Signal Path window.  
1
6
5
1. On/off  
Enables or disables filtering.  
2. Add Button  
8
Click this to add a filter. A light green circle appears, indicating the active fil-  
ter.  
7
3. Frequency Response Graph  
2
4
Shows the frequency response of individual filters (not summed). After turn-  
ing on filtering (1), click the graph to add a filter. A node appears. Click-drag  
each node to set its frequency and gain. The node turns yellow when  
selected, yellow-green when on, and dark green when not selected.  
4. Frequency, Gain and Q Settings  
This is an alternative to dragging nodes on the Frequency Response Display.  
Use arrow keys or enter values for each filter band. All filters are frequency  
adjustable for 20 Hz - 20 kHz. Gain is adjustable from +24 dB to –24 dB.  
11  
High-Q filters with gain greater than unity can cause unwanted ringing. This  
is true for both digital and analog filters and should be used with great care.  
3
5. Active Filter and Delete  
Active Filter selects the filter you want to adjust. Delete removes the  
selected filter.  
6. Type  
The filters provide an array of filter types for any processing need: Low-pass,  
High-pass, Low Shelf, High Shelf, Low-pass EQ, High-pass EQ, Parametric  
EQ, All-Pass1, All-Pass2.  
7. Octave Bandwidth  
Sets the octave bandwidth of the selected filter.  
8. Gain Slider  
This is another way to set the gain of the selected filter.  
12  
10  
9
Figure 4.10 EQ Filters Window  
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DBC Network Bridge  
4 Operation  
EQ Filters (continued)  
Please refer to Figure 4.11.  
9. Frequency Select Field  
Another way to select the center frequency of an active filter is to enter its  
value here, either by typing or by pressing the arrow buttons.  
1
5
6
10. Frequency Slider  
This is another way to set the center frequency of an active filter.  
8
11. (Combined) Responses  
This graph shows the summed total of the filter networks for that input.  
7
2
4
12. Show Magnitude/Phase  
Selects what is displayed in the Combined Response graph.  
EQ Filters windows in other parts of the signal path work the same way.  
11  
3
12  
10  
9
Figure 4.11 EQ Filters Window  
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DBC Network Bridge  
4 Operation  
4.7.5 All Outputs Volume Controls  
To open the volume controls for the output channels, click on  
the All Outputs icon in the Cinema Surround Signal  
Path window. See Figure 4.12. Here you can adjust the level,  
muting, and polarity of each channel.  
The master fader works like this:  
•
•
•
After you set the individual channel levels, their relative  
positions will be maintained when you move the mas-  
ter fader. It acts like a group fader.  
If you bring the master fader all the way down and back  
up without releasing the mouse button, the individual  
channel levels will be maintained.  
If you bring the master fader all the way down and  
release the mouse buton, all the channel faders will  
reset to –60 dB.  
Figure 4.12 All Outputs Volume Controls Window  
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DBC Network Bridge  
4 Operation  
4.7.6 Signal Generator  
Click on the Signal Generator tab to open the Signal Generator win-  
dow (Figure 4.13). This window provides a variety of test signals that can  
be applied to each output channel. Output levels and sine-wave frequency  
are adjustable.  
Figure 4.13 Signal Generator Window  
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DBC Network Bridge  
4 Operation  
4.7.7 CobraNet: Explanation  
The Conductor is responsible for ensuring that all devices on the CobraNet  
network transmit their bundles in a coordinated way. The Conductor recog-  
nizes each device on the network and assigns a transmission position for  
each bundle of each device.  
In the Signal Path window, Cinema Surround form, is a DBC Network  
Channel Assign button which opens the CobraNet Output window  
(described on the next page). If you need to understand how CobraNet  
works, please read the following section.  
In addition the Conductor sends master clock to each device to ensure that  
all audio is synchronous. Like a conductor of an orchestra, the Conductor  
signals the beginning of a synchronous transmission cycle, and then each  
device sends its bundle(s) in lock step. This occurs 750 times a second,  
with each audio channel having 64 samples of 48KHz audio. Each audio  
channel can be sent as 16, 20, or 24 bit samples. if 24bit audio is used  
then a bundle will be reduced to 7 channels. There is a fixed latency of  
5.33ms.  
CobraNet is a technology developed by Peak Audio, Inc. that allows real  
time digital audio to be distributed over standard Fast (100Mb) Ethernet  
hardware. CobraNet allows the DBC Network Bridge to not only have ana-  
log or digital inputs, but also to provide 8 digital Inputs and 8 digital Out-  
puts from a CobraNet network.These additional Inputs and Outputs allow  
enhanced routing and processing capabilities, including the passing of  
audio channels to other DBC Network Bridges to create larger mixing and  
processing structures.  
CobraNet networks utilize Fast (100Mb) Ethernet hardware and can use  
either repeater hubs or switches. A repeater hub is a device that takes the  
data that comes into each port, and sends it back out on all ports except the  
port it came in on. As a result, only multicast bundles can be used in  
repeater hub networks and these need to be limited to 8 bundles per net-  
work.  
Transmission of digital audio via CobraNet is accomplished through 'Bun-  
dles' and 'Slots'. Bundles are Ethernet packets that contain up to eight dig-  
ital audio channels, called 'Slots'. Each digital audio channel is assigned a  
position (1-8) within the Bundle, hence the name Slot. The Bundle is then  
assigned a unique number that indicates how it will be transmitted on the  
CobraNet network. A receiver merely needs to select the Bundle number to  
receive the audio.  
On the other hand, switches are much more efficient, in that they examine  
the destination address of each packet of data received on each port, then  
switch that data to the particular recipient of that packet. Unicast bundles  
exploit this feature to minimize the audio traffic on the CobraNet network.  
The result is that an almost limitless number of unicast bundles can be on  
a switched CobraNet network. Multicast bundles are allowed on a switched  
network, but they must be used with care.  
Bundles can be either multicast or unicast. Multicast bundles are sent to all  
CobraNet network devices, while unicast bundles are sent to one, and only  
one, CobraNet network device. Through the use of Fast Ethernet switches,  
unicast transmission of bundles can greatly increase the number of bun-  
dles that can be present on a CobraNet network since the bundles only go  
to the device that is addressed. Since each device can send and receive  
four bundles (i.e. up to 32 channels), great flexibility is allowed in the  
routing of audio over the network. Assignment of bundles as multicast or  
unicast is done through the assignment of the bundle number. Bundles  
with numbers 1-255 are always multicast, while bundles 256-65,279 are  
designated as unicast. Bundle assignments need to be unique, with only  
one CobraNet transmitter allowed per bundle.  
Peak recommends that not more than four multicast bundles be used in a  
switched CobraNet network. Peak also advise not to mix ordinary computer  
data on a repeater hub network, as this could result in dropout in the audio.  
In switched CobraNet networks, coexistence of CobraNet audio and ordi-  
nary computer data is possible, because there are no collisions with the  
audio.  
If there are only two DBC Network Bridge units involved in a CobraNet net-  
work these can be connected using CAT 5 crossover cables.  
The coordination, i.e. clock master, of the CobraNet network is the function  
of the 'Conductor'. The ‘Conductor Priority’ is set in each device and  
decides which unit will be the Conductor. If the Conductor is removed from  
the CobraNet network for any reason, the remaining devices decide who  
becomes the Conductor based on a numerical hierarchy, i.e. priority  
‘0’=never and ‘255’=always.The PS-8810 is set as ‘32’ as a default.  
More information:  
www.peakaudio.com  
www.iqaudiosystems.com  
CobraNet is a registered trademark of Peak Audio, Inc.  
page 34  
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DBC Network Bridge  
4 Operation  
4.7.8 CobraNet: Output  
In the Signal Path window, click on the DBC Network Channel Assign  
button to open the CobraNet Output window (Figure 4.14).  
The DBC Network Bridge’s eight CobraNet Outputs can be assigned to be  
transmitted on Slots in one of four CobraNet Bundles. The CobraNet Outputs  
can accept audio from either the corresponding ‘B’ Input Processing Section  
or the corresponding AUX Output Processing Section. Each of the eight  
CobraNet Outputs is then assigned a Bundle and Slot position. Unlike the  
CobraNet Inputs, the same CobraNet Output can go to more than one Bundle/  
Slot position.  
The ‘Unlink’ Button allows all of the Bundle/Slot assignments to be discon-  
nected, while the ‘Default Link’ Button allows assignment of CobraNet Output  
1 to Slot 1 of each Bundle, CobraNet Output 2 to Slot 2 of each Bundle, and so  
forth.  
Each Slot can be assigned either none, 16bit, 20bit, or 24bit resolution. Each  
Bundle is limited in the number of audio ‘bits’ that can be placed in a single  
Bundle and is a function of the maximum Ethernet data payload. The ‘Max  
Packet Size’ meter tracks how much room remains in the Bundle. Once the  
‘Max Packet Size’ has been exceeded, additional data will not be allowed. As  
can be seen in the figure above, seven 24bit Slots are allowed in TxC with Slot  
8 not active, while TxD allows all eight slots if three are 20 bit.  
The transmit Bundle is assigned in the window and a unique priority can also  
be assigned for each Bundle. This Bundle Priority is used by the Conductor to  
assign a transmit position on the CobraNet network. Audio Bundles are sent  
on the network in a synchronous fashion dictated by the Conductor. The Con-  
ductor assigns a position to each transmitting Bundle in the network based  
upon that Bundle’s Priority. At the start of a synchronous cycle, the Conductor  
tells the highest priority Bundle to transmit, then each successive Bundle  
transmits based upon its assigned Position. The ‘Receiver Count’ for each  
Bundle tells how many receivers, i.e. other devices on the network, are listen-  
ing to that Bundle. synchronous cycle, the Conductor tells the highest priority  
Bundle to transmit, then each successive Bundle transmits based upon its  
assigned Position. The 'Receiver Count' for each Bundle tells how many  
receivers, i.e. other devices on the network, are listening to that Bundle.  
Network Bridge Signal Flow Block Diagram for feature locations in the audio  
signal chain.  
Figure 4.14 CobraNet Output Window  
Operation Manual  
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DBC Network Bridge  
4.7.9 Booth Monitor Source Select  
In the Signal Path window, click on the Booth Monitor  
Source Select button to open the Booth Monitor  
Source Select window (Figure 4.15).  
6
The controls in this window allow you to adjust the level,  
muting and polarity of selected output channels that feed  
your booth monitor speakers. You can also select CobraNet  
Bundles and Channels.  
2
5
1. Input Selector Buttons  
2. Level Slider  
This slider adjusts the level of the selected channel.  
3. Mute Button  
Press this button to mute the channel. When muted, the  
button turns green and displays a red X.  
4. Polarity Button  
Press this button to toggle + or – polarity for the selected  
channel.  
3
4
1
5. DBC Outputs Meters  
7
6. CobraNet Bundle/Channel Selector  
In this area you can set up Bundle numbers with arrow but-  
tons, choose amplifier channels, and label the amplifier for  
each monitor speaker.  
Figure 4.15 Booth Monitor Source Select Window  
7. Current Input  
This display shows the selected input channel. If an ampli-  
fier channel 1 or 2 is selected, this display shows details on  
its CobraNet setup.  
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DBC Network Bridge  
4 Operation  
4.7.10 Presets  
Click on the Unit Presets tab to open the Presets window (Figure 4.16).  
3
The DBC Network Bridge has the ability to reconfigure itself with a single command. Thirty-two  
'Presets' can be stored and recalled via a variety of means including the front panel, a Control Port  
Input, or a scheduled 'Event'. Preset 32 is the standard cinema setup, which works in most  
cases. Preset 32 is explained under number 6 below.  
1
2
1. Store  
For a Preset to be stored, all of the individual controls needs to be set up using IQwic while on-  
line to the DBC Network Bridge, then press the 'Store' button and a select a Preset.  
To ensure that settings are not inadvertently lost due to selecting a Preset instead of storing a Pre-  
set, the “Prompt to recall or store” checkbox allows a query window to display whenever a Preset  
button is pressed in order to ensure the intent of the user.  
2. Label  
4
Each Preset has a 32 character user-definable label.  
3. Preset Segue  
This enables smooth level transitions between Presets. When a Preset is selected, all of the fader  
settings are changed at a rate that is determined by the ‘Preset Segue Settings’ box. The rate of  
change can be either a 'Fixed Time' that is selectable from 0 second to 255 seconds or a 'Fixed  
Rate' that goes from 0.5 dB/sec to 40 dB/sec.  
4. Verify Recall or Store  
When you click on a Preset number, this window appears so that you can recall the selected Pre-  
set, store it, or cancel.  
5. Preset Options Notice  
Right-click on preset numbers to open more options: Load or save Presets to file, cut or copy Pre-  
sets to clip area, and Edit Presets. Selecting Edit Presets opens the Preset Editor window  
described on page 38.  
6
6. Standard Cinema Preset Button (Preset 32)  
5
Pressing this button recalls the preset for a standard cinema setup: a read-only preset that cannot  
be edited by the user. If you want to create a preset based on Preset 32 but with changes, save it to  
another Preset. The Standard Cinema preset contains the following settings in the DBC Network  
Bridge:  
Figure 4.16 Presets Window  
•
•
•
•
•
The input is set to analog; the outputs are set to –20 dB.  
The Monitor is set to Ch1 at 0 dB.  
The CobraNet output for L, R, C, SW is set to TxA on Bundle 100 at 24 -bit.  
The CobraNet output for SL, SR, BSL, BSR is set to TxB on Bundle 200 at 24-bit.  
The CobraNet input for all eight input channels set to TxA on Bundle 300.  
Operation Manual  
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DBC Network Bridge  
4 Operation  
4.7.11 Preset Editor  
To open the Preset Editor window (Figure 4.17), start In the Unit Presets  
window, right-click on a preset number, and select Edit Presets. Note: Preset  
32, Standard Cinema, cannot be edited.  
1
2
1. Preset Name  
The name of the currently selected Preset is displayed here. You can give it a  
new name if desired.  
2. Show  
This area of the Preset Editor lets you select which control types you want to  
view in the Preset Control Window (3).  
3. Preset Control Window  
4
This window displays all the Preset Control settings that you have chosen to  
view. Click on any control setting to edit it. Settings made in processing win-  
dows are duplicated here, and vice-versa.  
4. Preset Select Buttons  
Click on the desired Preset number to view its control settings.  
3
Figure 4.17 Preset Editor Window  
page 38  
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DBC Network Bridge  
4 Operation  
4.7.12 Scenes  
Click on the Unit Scenes tab to open the Scenes window (Figure 4.18).  
Remember that an object is a software processor in the DBC Bridge. There are  
times when only a few objects’ settings need to be changed and this is the  
function of 'Scenes'. DBC Network Bridge Scenes allow up to 50 objects to be  
grouped together and changed to a specific state with a single command. Like  
Presets, Scenes can be changed from the front panel, a Control Port Input, or a  
scheduled 'Event'.  
Each Scene has a 32 character label associated with it and the Scene Editor  
allows the objects to be selected and configured for each Scene. Note: These  
‘unit’ Scenes should not be confused with the IQwic equivalents that are saved  
as .SIQ files, and are handled quite differently with a different scheduler.  
In any channel, click on the Edit button to open the Scene Editor window  
(described on the next page).  
Figure 4.18 Scenes Window  
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DBC Network Bridge  
4 Operation  
4.7.13 Scene Editor  
To open the Scene Editor window (Figure 4.19), click on the Edit button for  
any channel in the Scene window.  
1
5
2
3
1. Scene  
Select the Scene to be edited in the ‘Scene’ box at top, or click on one of the 32  
buttons located at the right of the screen.  
2. Controls  
The ‘Controls’ buttons let you view your choice of all parameters, dB parameters  
or Logical parameters.  
3. Named  
Use the ‘Named’ box to type in all, or part of, the name of the control you wish to  
add to the Scene. The selection of available parameters will change as you type,  
if the selection is incorrect, delete all the text and start again to bring back the  
complete listing.  
4
4. Add/Remove  
The ‘Add’ and ‘Remove’ buttons allow you to choose which parameters are to be  
included in the Scene.  
5. Try  
The ‘Try’ button allows the Scene to be simulated to ensure that the settings are  
those that are desired.  
Figure 4.19 Scene Editor Window  
page 40  
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DBC Network Bridge  
4 Operation  
4.7.14 Events Scheduler  
Click on the Unit Events tab to open the Events Scheduler window  
(Figure 4.20).  
Different configurations can be triggered at particular times. The DBC Network  
Bridge has an internal real time clock that can be used to set up a schedule for  
recalling Presets or Scenes. By using the 'Event Scheduler' to recall unit set-  
tings at certain times, the unit can be used in a variety of different ways.  
The internal clock has a ‘keep alive’ capacitor that allows the unit to be unpow-  
ered for up to 45 days without losing the current date and time.  
Each Event can be enabled individually and the entire Event Scheduler can be  
enabled, allowing the scheduler to be turned off without having to switch indi-  
vidual Events off. Each Event has its own label and the 32 Events can be indi-  
vidually set to recall a Preset or Scene in either a one time or periodic mode.  
In the Events Scheduler window, click on the Edit button next to any event  
number to open the One-Time Event window (described on the next page).  
Once events are enabled, you can click on the View Schedule button at the  
top to open the Schedule window (described on the next page).  
Figure 4.20 Events Scheduler Window  
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DBC Network Bridge  
4 Operation  
One Time Events  
In the Events Scheduler window, click on the Edit button to the right of any  
Event number. The One-Time Event window will open (Figure 4.21).  
Figure 4.21 One-Time Event Window  
An Event can be scheduled to occur only once, and the time of the Event can  
be programmed by choosing 'once'. The exact time of the Event can then be  
set.  
Periodic Events  
In the One-Time Event window, click on the Periodically button to open  
the Periodic Event window (Figure 4.22).  
Figure 4.22 Periodic Events Window  
If an Event is required at a set rate, the Event editor allows the programming  
the Event at periodic intervals. Each Event can have its own repetition rate and  
starting time, independent of any other. The Event schedule window shows the  
next 10 occurrences of the Event. By using multiple Events that are inter-  
leaved, a pattern of Events can allow switching between several setups in a  
regular timed fashion.  
Schedule  
Back in the Events Scheduler window, once events are enabled, clicking on  
the View Schedule button at the top opens the Schedule window (Figure  
4.23).  
Figure 4.23  
Schedule  
Window  
Here you can view all of the enabled Events for a defined period of time. This  
ensures that the desired sequence of periodic Events are occurring at the  
desired times.  
page 42  
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DBC Network Bridge  
4 Operation  
4.8.5 Memory Backup  
4.8 General Firmware Features  
The DBC Network Bridge settings are stored in  
high-endurance flash memory whenever a parame-  
ter is changed. Changed settings are updated every  
few seconds.  
Note: The following features are accessed via IQwic  
software unless otherwise stated. Refer to Figure  
4.24, DBC Network Bridge Signal Flow Block Dia-  
gram for feature locations in the audio signal chain.  
Front  
Display  
4.8.6 Presets  
4.8.1 Input Level Meters  
The parameters for all functions in the DBC Network  
Bridge can be saved as presets and each can be  
given a unique 32-character name. A total of 32  
user presets can be stored in the DBC Network  
Bridge’s flash memory. Presets can be recalled via  
the front-panel selector buttons, IQ for Windows  
preset selector controls, from within events, or by  
an external system controller via the Multi-Function  
Control Port.  
Audio level peak program meters are provided for  
each input. The meters sense the audio signal  
immediately after analog to digital conversion, and  
respond with 1.7 millisecond attack and 350 milli-  
second release. Meter range is from –60 to +20 dBu  
with 0.5 dB resolution. Calibration is in dBu when  
the input is in “line” mode and set at 0 dB.  
System  
Control  
Power Supply  
DSP  
4.8.2 Input Dynamic Cut/Boost Meters  
• Preset Segue: When a preset is selected, the  
Preset Segue feature provides a smooth transition to  
the new preset. Preset Segue can be set to either a  
fixed time in seconds or a fixed rate in dB per sec-  
ond. Range for fixed time in seconds is 1 to 255  
seconds. Range for fixed rate in dB per second is  
from 0.5 dB to 40 dB.  
Meters are provided for each Input A/B Processing  
Section to indicate the overall cut or boost being  
applied from all signal processing features that  
affect input gain, including Auto-Leveler, Input  
Compressor, and Auto-Mixing. Meter range is from  
–60 to +20 dBu with 0.5 dB resolution.  
100 VAC - 240 VAC  
50/60 Hz  
Audio  
Input  
Audio  
Output  
4.8.3 Output Level Meters  
4.8.7 Real Time Clock  
Audio level meters are provided for each output. The  
meters sense the audio signal immediately after the  
audio output processing block, and respond with  
1.7-millisecond attack and 350-millisecond release.  
Meter range is from –60 to +20 dBu with 0.5 dB  
resolution.  
The onboard Real Time Clock tracks day, date, hour,  
minute and second, and may be set to any date and  
time desired, or to match that of the computer run-  
ning IQ for Windows software. The clock is used as  
a time reference for the Events Scheduling feature.  
Internal capacitor storage allows the clock to run for  
up to 45 days without power being applied to the  
DBC Network Bridge.  
Control  
Port  
CobraNet  
8 Digital DB25 inputs  
8 Analog DB25 inputs  
2 Auxiliary analog inputs  
4.8.4 Output Dynamic Cut/Boost  
Meters  
Meters are provided for each output to indicate the  
overall cut or boost being applied from all signal  
processing features that affect output gain, includ-  
ing Ambient-Leveler and Output Limiter. Meter  
range is from –60 to +20 dBu with 0.5 dB resolu-  
tion.  
4.8.8 Events  
Figure 4.24 DBC Network Bridge Signal Flow Block Diagram  
User presets can be scheduled for recall as an Event  
at a specific date and time, and also can be set to  
repeat. A total of 32 Events can be scheduled, and  
each Event can be given a unique 32-character  
name.  
Operation Manual  
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DBC Network Bridge  
5 Advanced Operation  
5.1 Advanced Operation Table of Contents  
5 Advanced Operation ........................................... 44  
5.1 Advanced Operation Table of Contents ................................. 44  
5.2 Advanced Processing Functions........................................... 45  
5.2.1 CobraNet: Setup .......................................................... 45  
5.2.2 CobraNet: Input ........................................................... 47  
5.2.3 CobraNet: Output......................................................... 47  
5.2.4 Control Port................................................................. 48  
5.3 Advanced Form Firmware Features....................................... 54  
5.3.1 Input Path .................................................................... 55  
5.3.2 Input Delay .................................................................. 56  
5.3.3 Input Gate.....................................................................57  
5.3.4 Auto Leveler .................................................................58  
5.3.5 Automixer.....................................................................59  
5.3.6 Solo/Mute ....................................................................64  
5.3.7 Output Path ..................................................................65  
5.3.8 Ambient Leveler............................................................66  
5.3.9 Output Limiter ..............................................................67  
5.3.10 Outputs Button ...........................................................68  
5.4 Technical Description ........................................................... 69  
page 44  
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DBC Network Bridge  
5 Advanced Operation  
5.2 Advanced Functions  
5.2.1 CobraNet: Setup  
To open the CobraNet Setup window, click on the CobraNet tab, then click  
on the CobraNet Setup tab. The CobraNet Setup window opens  
(Figure 5.1).  
The CobraNet Setup tab allows overall control of the DBC Network Bridge’s  
CobraNet functions.  
Several labels and information are available:  
1. System Name  
This user-defined label indicates the name of the particular DBC Network  
Bridge.  
2. System Description  
This label is embedded in the CobraNode and indicates the manufacturer  
and description of the CobraNet device.  
3. System Location  
Used to describe the location of the CobraNet device.  
4. System Contact  
A label that tells who to contact in the event of a problem.  
5. Firmware Version  
Indicates the CobraNode’s firmware Protocol Version, Major Version, and  
Minor Version.  
6. MAC Address  
The CobraNode’s unique manufacturer hardware address.  
Figure 5.1 CobraNet Setup Window  
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DBC Network Bridge  
5 Advanced Operation  
CobraNet: Setup (continued)  
Please refer to Figure 5.2.  
7. IP Address  
The Internet Protocol address that is assigned by the system integrator.  
Used as a standard part of Ethernet networking transmission protocols and  
works much like a zip/postal code for the unit on the network.  
8. Conductor  
The CobraNet 'Setup' tab indicates information about the status of the Con-  
ductor (the CobraNet timing-master device). Each CobraNet device can be  
assigned its own Conductor 'Priority' which will be used to determine who  
will be the Conductor of the network. Conductor Priority values range from  
0 to 255, with 0 being the lowest priority and 255 being the highest prior-  
ity. A light indicates when the CobraNet device is the Conductor of the sys-  
tem. The DBC Network Bridge defaults to 32.  
9. Status indicators  
There are a number of status and error indicators for the CobraNet network.  
The Ethernet ‘Status’ tells if the physical network is connected to the unit.  
The ‘Rx Activity’ and ‘Tx Activity’ lights tell if there is incoming or outgoing  
Ethernet activity.  
The Error Indicators are:  
• Fault: An overall fault in the CobraNet network  
• Receive: An error on received CobraNet Bundles  
• Transmit: An error on transmitted CobraNet Bundles  
• Mute: An audio output may be corrupt  
• Clock: Fault or lost contact with the CobraNet network  
• Display: Encountered an unexpected error  
Figure 5.2 CobraNet Setup Window  
page 46  
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DBC Network Bridge  
5 Advanced Operation  
5.2.2 CobraNet: Input  
To access the CobraNet Input window, click on the CobraNet tab,  
then click on the CobraNet Input tab. The CobraNet Input window  
will open (Figure 5.3).  
The DBC Network Bridge can accept three Bundles from the CobraNet  
network and route the audio Slots of those Bundles into the process-  
ing and mixing of the unit. These three Bundles (RxB, RxC, and RxD),  
are assigned Bundle numbers by the Bundle window. If a transmitter  
is supplying audio on that Bundle, the Active lamp will light. The  
'Seek' button allows scanning of the multicast Bundles (Bundles 1-  
255) to see if any of the Bundles have audio data on them. If audio is  
detected on any of those Bundles, the Bundle number will stop at that  
point.  
The individual audio Slots are assigned one of the eight CobraNet  
Inputs to the DBC Network Bridge. Once the eight CobraNet Inputs  
have been assigned Bundles and Slots, they can be used by the unit  
for routing and processing. The CobraNet Inputs each have a unique  
label for identification and can be routed into the processor in several  
ways. The Input Processing Sections can accept either the analog  
input or the CobraNet Input auxiliary analog input, or a digital AES/  
EBU input. In addition, a CobraNet Input can be routed directly to a  
corresponding AUX Output. The monitor output has access to all eight  
CobraNet Inputs in its mix.  
Links from any of the 8 bundle audio channels can be drawn by click-  
ing on the pink boxes and dragging the wire to the chosen input. The  
‘Default Link’ button sets up the first bundle to link to the respective 8  
CobraNet inputs, while the ‘Unlink’ button removes all links.  
5.2.3 CobraNet: Output  
See this information in the Operation Section 4.7.8.  
Figure 5.3 CobraNet Input Window  
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DBC Network Bridge  
5 Advanced Operation  
5.2.4 Control Port  
The Control Port provides a means for external monitoring and control  
of ‘objects’ (software processors) within the DBC Network Bridge. It can  
be used to turn peripherals on and off, send signals to other system  
components, receive digital and/or analog signals from other compo-  
nents, and indicate status of the input gates.  
1
2
The Control Port implements sixteen outputs and sixteen inputs along  
with power supply outputs and common grounds. Eight of the outputs  
are digital ‘logic outs’, while the other eight are analog outputs that are  
capable of digital ‘logic outs’. Eight of the inputs (AIN1-8) are capable of  
monitoring digital and analog external signals. The other eight inputs  
(DIN1-8) are digital only.  
To open the Control Port window (Figure 5.4), click on the Control  
Port tab in the main window.  
In the following pages, we will look at each section of the Control Port  
window:  
1. Digital Inputs  
2. Digital Outputs  
3. Analog Inputs  
4. Analog Outputs  
3
4
Figure 5.4 Control Port Window  
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DBC Network Bridge  
5 Advanced Operation  
Control Port Window: Digital Inputs  
Figure 5.6 Sample  
Control-Port Digital  
Input Circuit  
The Digital Inputs are high or low only. They are current driven and will accept +5V or +10V  
inputs (+25VDC max), and are well suited for sensing contact closure (Figure 5.6). They  
switch at approximately +1 VDC. They can be used to control one or more objects with the  
DBC Network Bridge. The Control Port digital inputs can be used to sense logic 'high' or  
'low' signals to control many of the features of the DBC Network Bridge.  
Find the Digital Inputs section (Figure 5.5) in the Control Port window. Its features are  
described below.  
Figure 5.5 Digital Input Section in the Control Port Window  
1. Pin State Indicator  
This shows the actual status of the hardware input as it comes into the rear panel connector.  
2. Edit Buttons  
1
2
3
Pressing one of these buttons opens the Control Port Assignment Dialog box, explained  
later.  
10  
11  
12  
7
3. Pin  
8
9
This number reflects the physical pin number of the DB37 connector on the rear of the unit.  
4
4. Edit Mapped Conditions  
Pressing this button opens the Condition Logic Setup window, described later.  
Control Port Assignment Dialog  
In the Control Port window, find the Digital Inputs section (Figure 5.7). When the Edit  
Button is pressed on a Digital Input, the Control Port Assignment Dialog box (Figure  
5.8) opens to assist in setup of the input. It is described below and on the next page.  
1. Control Port Object  
This field displays the currently selected object or device, such as Digital Input 1 - Pin12.  
5
2. Controls  
The control buttons let you select which type of controls you want to display: Any, dB, or log-  
ical.  
6
3. Named  
You can enter text here to narrow the search for controls.  
4. Controls List  
This field displays a list of processes that can be applied to the object. Once the desired con-  
trol has been found in the Controls List, highlight it and press the Add button (5).  
Figure 5.7 Control Port Assignment Dialog Window  
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DBC Network Bridge  
5 Advanced Operation  
Control Port Assignment Dialog (continued)  
1
3
Please refer to Figure 5.8.  
2
10  
11  
12  
7
5. Add / Remove Buttons  
Once the desired object has been found in the Controls List (4), highlight it and press the Add  
button (5). The object will appear in the Object List (6) at the bottom of the window. Highlight a  
particular object in the bottom window to edit its attributes. You can remove a highlighted  
object by pressing the Remove button.  
8
9
4
6. Object List  
This is a list of objects that have been selected and added.  
7. Set Objects  
Allows a single input to control up to fifty objects within the DBC Network Bridge. Binary  
objects can be controlled with normal or inverted logic. Multi-valued objects (e.g. gains,  
thresholds, etc.) can be set to different settings for input transitions from low-to-high and high-  
to-low.  
5
8. Bump Objects  
Similar to Set Object mode, except that rather than setting the object to an absolute value, the  
specified values are added to the current object values. Upper and lower limits can be set to  
limit the range of the control.  
6
9.Bump Objects Continuously  
Similar to Bump Object mode, except that the specified values are added to the object value  
continuously at ¼ second intervals.  
10. Toggle  
Toggle applies to binary functions objects that have two states. The toggle will use the same  
stimulus to switch between states.  
11. Recall Preset  
Figure 5.8 Control Port Assignment Dialog Window  
Enables the input to recall one of the 32 user Presets. Separate Presets can be recalled for low-  
to-high and high-to-low transitions.  
12. Recall Scene  
Enables the input to recall one of the 32 user Scenes. Separate Scenes can be recalled for low-  
to-high and high-to-low transitions.  
page 50  
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DBC Network Bridge  
5 Advanced Operation  
Control Port: Condition Logic Setup Window  
To open the Condition Logic Setup window (Figure 5.9), press the  
Edit Mapped Conditions button in the Control Port window.  
1
9
1. Condition  
2
Allows up to 64 different binary combinations of pin states. Up to eight  
inputs are allowed in any state, giving up to 255 different combinations  
for each of the the 64 configurations.  
7
2. Name  
3
Naming convenience for the configuration. 64 names are available.  
4
3. Include  
Of the eight bits available to read, Include instructs the unit which of  
the eight to include in the binary scheme.  
4. Pin Combinations  
Assigns included pins in selected states; it can be either a true or false  
action. When true, do X; when false, do Y.  
5
5 and 6. Pin Combinations and Resulting State Field  
Allows you to assign up to 255 different combinations of pin states, and  
assign that combination to be either true or false.  
7.Conditions  
A numeric view of #3 above.  
8. Control Port Simulation  
An area that allows you to set the pin states on the control port to either  
high or low to test assigned logic for desired operation.  
8
6
9. Edit Condition Actions  
Press this button to go to the Control Port Assignment Dialog  
(described on the previous two pages).  
Figure 5.9 Condition Logic Setup Window  
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DBC Network Bridge  
5 Advanced Operation  
Control Port Window: Digital Outputs Section  
In the Control Port window, find the Digital Outputs section (Figure 5.10).  
There are eight digital outputs. Each output may be controlled manually, config-  
ured to indicate the state of a binary object or, configured to indicate whether a  
particular Preset is loaded. There is one indicator and five controls for each out-  
put:  
Figure 5.10 Digital Outputs Section of  
the Control Port Window  
1. Output State (Pin State Indicator)  
Indicates the logical ‘Pin-High’ or ‘Pin-Low’ status of the actual hardware output.  
2. Manual  
Directly controls the output state of the corresponding pin when in Manual  
mode.  
3. Polarity  
Changes the polarity of the digital output regardless of the pin control mode.  
4. Reflect Manual  
This causes the output to directly reflect the state of its Manual control.  
5. Reflect Object  
This causes the output to reflect the state of the selected binary object within the  
DBC Network Bridge. Only a single object may be specified.  
Figure 5.11  
A Sample Control-Port Output Circuit  
6. Reflect Preset  
This causes the output to reflect whether the chosen Preset number is loaded  
within the DBC Network Bridge.  
When the Control Port digital outputs are turned 'on', +10VDC at 10 mA is sup-  
plied across the output to ground. A total of 1 amp of current is available.  
There are many possible uses for the Control Port outputs. For example, they  
can be used to turn on auxiliary cooling fans. To do this the output signal might  
be used to close a relay (Figure 5.11). The relay would then turn the fans on or  
off.  
By monitoring the operating condition of amplifiers (with the IQwic software),  
the need for additional cooling would be apparent. The software could then be  
used to turn on the appropriate Control Port input.  
Figure 5.12  
A Sample Control-Port  
Output LED Circuit  
Another use for the Control Port outputs might be to light an LED on an annun-  
ciator panel to indicate Preset status, input channel mute, or any other on/off  
type function (Figure 5.12).  
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DBC Network Bridge  
5 Advanced Operation  
Control Port Window: Analog Inputs Section (AIN 1-8)  
Find the Analog Inputs section (Figure 5.13) in the Control Port win-  
dow. It has a status indicator and level meter for each input channel.  
The Control Port analog inputs allow a 0 to +10 VDC signal to be input to  
allow remote control of continuously variable objects such as faders or fil-  
ter frequencies. They can also be used to control switched objects (just like  
the Digital Inputs). When the Edit button associated with a particular input  
is pressed, the Control Port Assignment Dialog box appears and  
allows programming of the input just as was discussed for the Digital  
Inputs. These inputs can be used to sense the presence of an analog input  
signal level, such as ordinary 10 kilohm linear potentiometers for level  
control (Figure 5.14). Analog inputs can alternately be set to sense simple  
contact closure.  
Figure 5.14 Sample Control-Port Analog Input Circuit  
Control Port Window: Analog Outputs Section  
Find the Analog Outputs section (Figure 5.15) in the Control Port  
window.  
In addition to the eight Digital Outputs, there are eight Analog Outputs that  
can be used to provide an output voltage (0 to +10V DC for control). These  
outputs can reflect a particular analog object such as a fader, or a switched  
object and, can be used to provide drive for such things as lighting con-  
trols or for a standard digital type output.  
Figure 5.13 Analog Inputs Section  
of the Control-Port Window  
The settings are remembered in a Preset, so they can be used to change the  
voltage of a particular output based upon Preset.  
A screw-terminal board with barrier-block to DB37M  
connections makes it easy to interface external circuitry  
to the Control Port. Measurement Computing™ Corp.  
offers a suitable screw-terminal board (part number  
CIO-MINI37), along with an enclosure (part number  
ENCMINI37) for this use.  
There are one indicator and six controls for each output.  
1
2
3
1. Pin State Indicator: indicates the logical 'Pin-High' or 'Pin-Low' sta-  
tus of the actual hardware output.  
2. Manual: directly controls the binary output state of the corresponding  
pin when in Manual mode.  
3. Polarity: changes the polarity of the analog output regardless of the  
pin control mode.  
4. Reflect Manual: causes the output to directly reflect the state of its  
Manual control.  
Contact Measurement Computing Corp. at  
www.measurementcomputing.com or (508) 946-5100.  
4
5
6
7
5. Reflect Binary: causes the digital output to reflect the state of the  
selected binary object within the DBC Network Bridge. Only a single object  
may be specified.  
6. Reflect Slider: causes the analog output to reflect the setting of the  
slider control associated with the output.  
7. Reflect dB: causes the analog output to reflect the status of the  
selected dB object. Only a single dB object may be specified.  
Figure 5.15 Analog Outputs Section of the Control-Port Window  
Operation Manual  
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DBC Network Bridge  
5 Advanced Operation  
5.3 Advanced Form Firmware Features  
This section explains the advanced signal-path features in the  
DBC Network Bridge.  
21  
22 23  
24  
10  
25  
15  
From the Signal Path tab, click on the Advanced button at the  
top. This opens the Advanced Form window (Figure 5.16). Its  
functions are listed below, and each function is explained in the  
following pages.  
3
7
6
9
4
12 13  
16  
1
5
8
17  
11  
14  
2
Note that most functions are duplicated on all the input and out-  
put channels. Also, the Input EQ Filters and Input Compressor  
were covered earlier in Section 4.  
1. Input Select  
Toggles between analog/digital input or CobraNet input.  
2. Input Path  
3. Input Level/Polarity/Mute (same as 2)  
4. Input EQ Filters (see Section 4.7.4)  
5. Input Delay  
6. Input Gate  
7. Auto Level Settings  
8. Input Compressor (see Section 4.7.2)  
9. Auto-mix Controls  
10. Input Path Filter (Same as Input Filter - see Section 4.7.4)  
11. Output Path  
12. Same as 11  
13. Output Delay  
14. Output EQ Filters (Same as Input EQ Filter - see Section  
4.7.4)  
15. Ambient Leveler  
16. Output Limiter  
17. Output Path (Same as 11)  
18. CobraNet Output = Input Path or Output Path  
19. View CobraNet Input (same as CobraNet tab > CobraNet  
Input)  
20. View CobraNet Output (same as CobraNet tab > Cobra-  
Net Output)  
21. Inputs button: View all input sections  
22. Auto-mix Matrix Button  
23. Auto-mix Groups Button  
24. Solo/Mute Button  
20  
19  
25. Outputs Button: View all output level controls  
18  
Figure 5.16 Advanced Form Window in the Signal Paths Tab  
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DBC Network Bridge  
5 Advanced Operation  
5.3.1 Input Path  
Starting from the Signal Path window, you can access the Input Path window (Figure 5.17) for any channel  
by clicking on either an input-select button or the Input Path icon (shown above) for the channel.  
1
1. Input Selector  
Choose which input channel to view by either pressing the blue or green input channel required or, pick an  
input from the drop-down box.  
2
2. Input Meter  
The switched input signal is sampled and displayed.  
3. Input Select Switch  
The signal that is input to each of the Input Processing Sections can be either the associated analog audio sig-  
nal from the rear panel or the associated CobraNet input.  
7
4. Input Processing Selection  
Displays the DSP processes available to the selected input path. If the icons are colored, the processes are  
enabled. Click on the process box in order to edit its parameters.  
4
3
5
5. Input Signal Fader, Muter, and Inverter  
The output of each of the Input Processing Sections has a fader associated with it prior to the Matrix Mixer. In  
addition, the Input Processing Section has a muter and inverter.  
6. Input Window Link  
This button opens a further window (Figure 5.18) that displays all the input gain faders with level meters, mute,  
polarity and input select switches. It provides an overview of the Input Processing Section DSP processes that  
are enabled/disabled for the selected input channel.  
7. Outputs  
Controls the “mix” level or matrix level of that particular input to the various outputs available on the unit.  
6
Figure 5.17 Input Path Window  
Figure 5.18 Input Window  
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DBC Network Bridge  
5 Advanced Operation  
5.3.2 Input Delay  
Starting from the Input Path window, you can access the Input Delay win-  
dow (Figure 5.19) by clicking on its icon (shown above).  
A delay can be added to any of the Input Processing Sections in order to time-  
equalize the various input signals. Delay is displayed in IQwic software in  
time, feet, and meters. Control range is from 0 to 100 milliseconds in 20  
microsecond steps. Delay time can be adjusted up to a maximum of 2 seconds  
for each channel.  
Hardware Delays  
The delays in the DBC Network Bridge are fixed and allow very precise align-  
ment of audio signals. Delay elements are available in each Input Processing  
Section to ensure that audio alignment is attained. The processing time delays  
of each of the various components in the DBC Bridge and CobraNet network  
need to be taken into account in this alignment process. These are fixed laten-  
cies in order to keep filter alignment together.  
The various delays in the DBC Network Bridge are:  
• Input A/D Converter: 667us  
• DAC Converter: 520us  
• Input Processing: 1.665ms  
• Output Processing: 1.665ms  
• CobraNet: 5.333ms  
Figure 5.19 Input Delay Window  
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DBC Network Bridge  
5 Advanced Operation  
5.3.3 Input Gate  
Starting from the Input Path window, you can access the Input Gate window (Figure 5.20) by clicking on its icon  
(shown above). The Input Gate feature allows signals above a certain level to pass and attenuates lower level signals.  
When 'open', the Input Gate passes the input signal un-attenuated. When 'closed', it attenuates the input signal by an  
amount specified with the Depth control. There are eight parameters which control this feature:  
1
9
1. Enable Gate  
Switches the gate on or off.  
2
2. Depth  
Sets the 'closed' gain of the Gate. Control range is from –100 dB to 0 dB in 0.5 dB steps.  
3. Static Threshold  
4
3
Specifies the peak signal level (after side-chain processing) above which the gate will open. Control range is from –80  
to +20 dB in 0.5 dB steps.  
4. Hysteresis  
5
6
7
8
Sets a range in dB above and below the Threshold which separates the levels at which the Input Gate opens and closes  
(Figure 5.21). The input signal must reach a level above the Threshold plus Hysteresis to open. Once opened, the  
input must reach a level below the Threshold minus Hysteresis to close. Control range is from 0 dB to 12 dB in 0.5 dB  
steps.  
5. Signal Delay  
Additional delay applied to the input signal, but not to the control key signal. Provided to allow the Input Gate to 'look  
ahead' in time. Control range is from 0 milliseconds to 10 milliseconds.  
6. Attack Time  
Sets the time required for the Input Gate to increase its gain by 20 dB. Control range is from 0.2 millisecond to 100  
milliseconds.  
7. Hold Time  
Determines how long the Input Gate will remain open after the control key signal falls below the Threshold. Control  
range is from 0.01 second to 10 seconds.  
Figure 5.20 Input Gate Window  
8. Release Time  
Input Level  
Sets the time required for the Input Gate to decrease its gain by 20 dB. Control range is from 0.01 second to 10 sec-  
ond.  
Open  
9. Side-chain Filter  
The Side-chain Filter processes the Control Key signal used to trigger the Input Gate. Its output is not directly in the  
signal path, and only affects the sensitivity of the Gate Threshold versus frequency. This filter can be especially useful  
in situations where certain frequency components need to be rejected by the gate. The use of this filter in conjunction  
with the Signal Delay can provide de-essing of the gate.  
Figure 5.21 Hysteresis  
Threshold  
Close  
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DBC Network Bridge  
5 Advanced Operation  
5.3.4 Auto-Leveler  
Starting from the Input Path window, you can open the Auto-Leveler window (Figure 5.22) by clicking on its icon  
(shown above). The Auto-leveler works in tandem with the Input Gate to compensate for long-term average input levels  
that vary over time. When the Auto-leveler is enabled, the open state gain of the corresponding Input Gate, normally 0 dB,  
is adjusted dynamically to achieve a desired average output level. The Auto-leveler’s effect on input gain is metered by the  
Input Dynamic Cut/Boost Meter.  
1
2
3
4
In the example above, the Threshold is set to –20 dB and the Auto-leveler allows the input signal to pass unaffected at lev-  
els below the Threshold. At input signals above the Threshold, the Auto-leveler adds gain to try and adjust the signal to  
the 0 dB Target Level. At input signal levels above 0db, the signal is clamped to 0 dB. Eight parameters control this fea-  
ture:  
1. On/Off  
Turns this feature on or off.  
2. Target Level  
6
Sets the desired average output level. The Auto-leveler will expand input signals below this level and compress input sig-  
nals above this level. Control range is from –100 to +20 dB in 0.5 dB steps.  
5
3. Max Gain  
Sets the maximum gain through the Auto-Leveler. This feature can prevent 'runaway' from occurring during periods of  
very low signal level. Control range is from –100 to +20 dB in 0.5dB steps.  
7
8
4. Idle Gain  
Sets the initial Gate gain when the Auto-Leveler mode is set to “Open to Idle Gain”. Using the “Idle Gain” setting can pro-  
vide a smoother transition from very soft to very loud input program. Control range is from –100 to +20 dB in 0.5dB  
steps.  
Figure 5.22 Auto-Leveler Window  
5. Open to...  
When set to “Last Gain” the Gate opens to the last gain computed by the Auto-Leveler. In “Idle Gain” position, the Gate  
opens to a potentially safer “Idle Gain” setting.  
6. Threshold  
Sets the input level below which the Auto-Leveler action will be inhibited. This allows the Auto-Leveler to suspend gain  
changes during quiet passages and, along with Max Gain, prevent excessive system gain. Control range is from –100 to  
+20 dB in 0.5 dB steps.  
7. Attack Time  
Sets the time required for the Auto-Leveler to expand its gain by 20 dB. Control range is 0.1 to 60 seconds in 0.1 second  
steps.  
8. Release Time  
Sets the time required for the Auto-Leveler to compress its gain by 20dB. Control range is 0.1 to 60 seconds in 0.1 sec-  
ond steps.  
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DBC Network Bridge  
5 Advanced Operation  
5.3.5 Automixer  
Priority Ducking  
Enforces a priority order of open microphones such  
that high priority inputs duck (attenuate) lower-pri-  
ority inputs. Additionally, a maximum number of  
equal-priority open microphones may be specified.  
Each input can be assigned a Priority from 1 (high-  
est) to 8 (lowest). When an input gate opens, it is  
allowed to pass according to the priority that has  
been assigned and is dependent upon the other  
open inputs within its group.  
Automatic mixers allow 'hands-free' mixing that  
minimizes many of the undesirable effects of using  
multiple microphones. Applications such as confer-  
ence rooms, training rooms and boardrooms typi-  
cally implement many microphones for individual  
speakers. Simultaneously mixing all microphones  
with acceptable gain before feedback manually is  
not possible.  
Keeping the number of open microphones to a min-  
imum reduces background noise while allowing a  
higher gain before feedback for improved intelligi-  
bility.  
The DBC Network Bridge implements three auto-  
mixing functions to address this situation: Priority  
Ducking, NOM Attenuation and Adaptive Gating.  
Input gates must be enabled for all inputs participat-  
ing in Priority Ducking within an Automix Group. If  
an input belongs to more than one Auto-Mix Group,  
it MUST be the highest priority in all of the groups  
in which it participates.  
Each of the sixteen Input Processing Sections can  
be grouped into any of 32 Auto-Mix Groups. In  
addition to the Group assignment, each Input Sec-  
tion includes a separate 'Enable' control. This con-  
trols whether the respective channel participates  
in its assigned groups AutoMixing functions. There  
are group Automixing controls and individual Input  
Processing Section controls. Automixing’s effect on  
input gain is metered by the Input Dynamic Cut/  
Boost Meter.  
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5 Advanced Operation  
Automix Controls  
Starting in the Input Path window, you can open the Automix Controls  
window (Figure 5.23) by clicking on its icon (shown above).  
8
There are four individual Input controls:  
1. Priority  
Assigns a relative priority to each channel. Control range is 1 to 8, where 1 is  
the highest priority and 8 is the lowest priority.  
7
2. Depth of Cut  
Sets the ‘ducked’ mic gain. Control range is from -100 to 0 in 0.5dB steps.  
3. Attack Time  
Sets the time required for Priority Ducking to attenuate the mic gain by 20 dB.  
Control range is from 10 milliseconds to 10 seconds in 10 millisecond steps  
4. Release Time  
Sets the time required for Priority Ducking to increase the mic gain by 20 dB.  
Control range is from 10 milliseconds to 10 seconds in 10 millisecond steps  
3
4
6
5
5. Ambience Weighting  
The weighting factor used in the ambient level calculation for each input. This  
control should be set to 1 with the following two exceptions:  
1. To exclude the mic from the ambient level calculation, set the weighting fac-  
tor to zero.  
2. To compensate for a mic in a relatively noisy location set the weighting fac-  
tor to a value between zero and one. Control range is from 0 to 1 in 0.1 step  
increments.  
2
6. Priority Ducking vs. Channel Graph  
Allows you to see and adjust the gate priority of the selected input. The dB  
level adjustment is the level that input will duck down when a higher-priority  
input gate is activated. 1 is the highest priority, while 8 is the lowest.  
1
Figure 5.23 Automix Controls Window  
7. Include in Automix Groups  
There are 32 automix groups available. Each group would most likely repre-  
sent an individual room or zone if the DBC were to be used for multiple areas.  
8. Automix Matrix Button  
Clicking this button opens the Automix Matrix, described on the next page.  
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5 Advanced Operation  
Automix Matrix  
Access the Automix Matrix (Figure 5.24) by pressing the Auto-  
mix Matrix button in the Signal Path window.  
This window is an interactive overview of all the possible automix  
routings assignments and priorities. There are three main auto-  
mix functions; Ducking, NOM and Adaptive Gating and these  
work as a group.  
Ducking is based upon the 16 inputs, these inputs are assigned a  
priority (1 being the highest) and involves cutting an input based  
upon a gate being open for a higher priority. NOM is a reduction  
based upon how many open mics are in the group and Adaptive  
Gating moves the threshold of the gate based upon an external  
source.  
Colors denote the type of function assigned from the input to the  
automix group, Blue=Ducking, Yellow=NOM and Green=Adaptive  
Gating. Assignments set up in the matrix take on the color of the  
active function and, if two or more functions are set up then the  
color will change to red. If the individual input enable switches  
are off then the colors become faint and, if the group functions  
are disabled then the numbers become white although the  
assignment remains.  
The group function is enabled by clicking on the rows (either  
Duck, Nom or Gate) at the top of the window. Clicking on the  
Group row numbers at the very top of the window accesses the  
group controls window for that group number.  
Figure 5.24 Automix Matrix Window  
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5 Advanced Operation  
Automixing Group Controls  
14  
Access the Automixing Group Controls (Figure 5.25) by pressing the Auto-mix  
Groups button in the Signal Path window.  
11  
12  
There are two group controls and two group indicators for this feature:  
2
1. Priority Mix Enable  
Turns Ducking Priority Mix on and off for the automix group.  
13  
8
3
4
2. Max Number of Open Mics  
Sets the max number of open mics within the automix group. A last-in, first-out algo-  
rithm is used to determine which mics are ducked.  
1
3. Highest Open Mic Priority Indicator  
Shows the highest priority level for all open mics within the automix group.  
6
4. Total Number of Open Mics Indicator  
Indicates the total number of presently open mics within the automix group.  
5
10  
9
NOM (Number of Open Mics) Attenuation reduces overall system gain as the  
number of open mics increases beyond one for improved gain before feedback.  
There are three group controls for this feature:  
7
5. Enable  
Turns NOM Attenuation on and off within an automix group.  
6. Mode  
Sets the attenuation algorithm to linear or logarithmic. In linear mode, each open mic  
beyond one will cause all inputs in the auto-mix group to be attenuated by an amount  
equal to the Attenuation Step Size, defined below.  
Logarithmic mode: the attenuation per open mic will decrease as more mics open.  
Logarithmic mode with Attenuation Step Size of 3dB emulates 'classic' NOM attenua-  
tion schemes.  
Linear mode: allows each individual mic to use a higher nominal gain by more  
aggressively attenuating as more mics open.  
Figure 5.25 Automixing Group Controls Window  
7. Step Size  
With NOM Attenuation mode, determines the attenuation as a function of the number of  
open mics in the auto-mix group. In linear mode, each open mic beyond one increases  
the attenuation by this amount. Control range is from 0.5 to 3dB in 0.5dB steps.  
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5 Advanced Operation  
Automixing Group Controls (continued)  
14  
Please refer to Figure 5.26.  
11  
12  
Adaptive Gating  
Adaptive Gating dynamically modifies the Input Gate thresholds in the auto-mix group as a function  
of the ambient level in the room. The ambient level is computed as the weighted average of the closed  
mic input levels. The weighted average makes it possible to compensate for mic locations with differ-  
ent ambient levels. Adaptive Gating functions are described below in numbers 8, 9, 10 and 14.  
2
13  
8
3
4
1
8. Enable  
Turns Adaptive Gating on and off for an automix group  
9. Ambient Level Meter  
Indicates the calculated ambient level for the automix group.  
6
10. Group Gate Threshold Ambient Offset  
Sets the amount above the calculated ambient level for the gate threshold for all inputs participating  
in the automix group.  
• For inputs with ambient weighting factors equal to zero or one, the actual gate threshold will be off-  
set from the calculated ambient level by this amount.  
5
10  
9
• For inputs with ambient weighting factors between zero and one, the offset is expanded prior to  
adding it to the calculated ambient level — the smaller the weighting factor, the larger the expansion.  
Control range is from 0 to 20 dB in 0.5 dB steps.  
7
11. Automix Group  
This selects/indicates the automix group that the accompanying settings are adjusted for. There can  
be different settings for different automix groups (1-32).  
12. Automix Matrix Button  
Pressing this button opens the Automix Matrix window (described earlier).  
13. Input Buttons  
This area and buttons indicate and control the following:  
a. Input Number  
b. Ducking Priority Number (1-8)  
c. Automix Group Attached (1-32).  
Figure 5.26 Automixing Group Controls Window  
14. Groups  
Indicates with color which groups are active, and which of the three options are enabled. Options are:  
a. Gate Ducking  
b. NOM (Number of Open Microphones)  
c. Adaptive Gating  
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5 Advanced Operation  
5.3.6 Solo/Mute  
At the top of the Signal Path window, find the Solo/Mute button. Pressing  
this button opens the Solo/Mute window (Figure 5.27). It lets you monitor  
the status of the Input and Output channel mutes and solos. From here, indi-  
vidual channels can be soloed for preview purposes, and can be muted  
equally. All solos and mutes can be switched in or out for the Inputs and Out-  
puts separately.  
Figure 5.27 Solo/Mute Window  
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5 Advanced Operation  
5.3.7 Output Path  
Starting in the Signal Path window, at the end of the Output processing section,  
you can access the Output Path window (Figure 5.28) by clicking on its icon  
(shown above).  
In addition to the output of each of the sixteen Input Processing Sections, the eight  
CobraNet Inputs are fed to the Matrix Mixer, providing a 24 Input by 10 Output fully  
independent crosspoint mix as controlled by the Input/Output Matrix. Each of the ten  
Output Processing Sections has independent fader control of all of the inputs to the  
selected output, i.e. a 24:1 mixer, as shown in Figure 5.29.  
The Mix Mode drop-down box is used for selecting exclusive assignments between  
a particular input and output. This function is repeated with the Single Input Mix  
Mode Buttons or the routing can be reassigned to the 24:1 mixer.  
The selected output channel displays the status of the Output Processing Section  
objects and their parameters can be accessed by clicking on these icons. There is  
also a button to quickly access the Input/Output Matrix for further routing options.  
Output Processing Sections  
Each of the ten Outputs, (two 'Main' and eight 'AUX)', have independent Output Pro-  
cessing Sections to allow control of the mixed output. Output Processing functions  
include delay, filters, ambient leveler, limiter, fader, mute, and polarity inverter.  
Output Delay  
Output Delay (Figure 5.29) can be set for each Output Processing Section. This sig-  
nal delay is especially useful in loudspeaker array alignment, where the crossovers,  
mix, and other processing is complete and the loudspeaker needs to be aligned to  
the system.The inherent delays of the various input signals should be corrected by  
the delay in the Input Processing Section.  
Figure 5.28 Output Path Window  
Delay is displayed by IQwic software in milliseconds, feet, and meters. Available  
delay for each Output Processing Section is up to 2 seconds in 20 microsecond  
steps (1/4 inch).  
Output EQ Filters  
These filters are identical to the Input EQ Filters. Please read Section 4.7.4 on Input  
EQ Filters for more information. As was the case with the Input EQ Filters, the two  
DSP’s that process the outputs have a finite amount of processing capability. Each of  
the DSP’s can provide up to 64 filters, with Main 1 and AUX 1-4 processed by one  
DSP and Main 2 and AUX 5-8 processed by the other. The CPU Utilization meters  
indicate how much DSP processing capability remains.  
Figure 5.29 Output Delay Window  
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5 Advanced Operation  
5.3.8 Ambient Leveler  
4. Expansion Ratio  
Determines how much the gain of the output channel will increase for every  
increase in the ambient signal level above the Threshold setting. A 4:1  
Expansion Ratio setting will raise the output gain 4 dB for every 1 dB that  
the ambient signal increases. Control range is from 0.1:1 to 5:1.  
2
4
Starting in the Output Path window, you can access the Ambient  
Leveler window (Figure 5.30) by clicking on its icon (shown above).  
1
8
5. Max Added Gain  
Sets the maximum increase in gain through the Ambient Leveler. Control  
range is from 0 dB to +20 dB in 0.5 dB steps.  
The Ambient Leveler expands the output channel gain to compensate for a  
sensed ambient level. The ambient level can be sensed from any of the six-  
teen Input Processing Sections, or the computed ambient level from one of  
the 32 auto-mix groups. This feature allows the DBC Network Bridge to  
maintain optimum signal to noise and intelligibility in environments with  
varying background noise.  
5
6. Attack Time  
Sets the time required for the Ambient Leveler to expand its gain by  
20dB. Control range is from 0.1 to 60 seconds in 0.1 second steps.  
The software graphically displays the gain function, with line meters under-  
neath the graph displaying the Input Ambient Sense level (green) and the  
Output Signal Level (blue).  
7. Release Time  
Sets the time required for the Ambient Leveler to compress its gain by  
20 dB. Control range is from 0.1 to 60 seconds in 0.1 second steps.  
3
Seven parameters control this feature:  
8. Program Level Dependent Mode  
9
Allows the Ambient-Leveler expansion to be inhibited when the actual out-  
put Program level is above a prescribed level. This mode prevents program  
material 'feed-through' from artificially increasing the apparent ambient  
level.  
1. On/Off  
Turns this feature on or off.  
10  
2. Sense Input  
Determines the source for the ambient level that will do the adjustment.  
6
9. Program Level Threshold  
Sets the output program level threshold above which Ambient Leveling will  
be inhibited when in Program Level Dependent mode. Control range is  
from –80 to +20 dB in 0.5 dB steps.  
3. Sense Threshold  
Sets a level for the ambient sensor input threshold. The Ambient-Leveler  
expansion will be inhibited for input levels below this threshold. This  
action allows the Ambient-Leveler to suspend gain changes when the  
ambient level is low and, along with Max Added Gain, prevent excessive  
system gain. Control range is from –80 dB to +20 dB in 0.5 dB steps.  
7
10. Sense Delay  
Figure 5.30 Ambient Leveler Window  
Sets the delay after the output program level falls below the Program Level  
Threshold before the Ambient Leveling begins. Control range is 0 to 60  
seconds in 0.1 second increments.  
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5 Advanced Operation  
5.3.9 Output Limiter  
Starting in the Output Path window, you can open the Output Limiter win-  
dow (Figure 5.31) by clicking on its icon (shown above).  
This function lets you monitor and control the peak output level. It is espe-  
cially valuable for the protection of amplifiers, loudspeakers and other audio  
equipment. The Output Limiter operates like a compressor with an infinite  
compression ratio, preventing the output level from exceeding the specified  
Threshold.  
1
Four parameters control this feature:  
1. On/Off  
Turns this feature on or off.  
2. Threshold  
Used to set the peak signal level above which compression occurs. Control  
range is from –80 to +20 dB in 0.5 dB steps.  
3. Attack Time  
Sets the time required for the Output Limiter to decrease its gain by 20 dB.  
Control range is from 1 to 100 milliseconds in 1 millisecond steps.  
2
4. Release Time  
Determines how long it takes for the gain to return to normal when the level  
drops below the Threshold. Control range is from 10 milliseconds to 10 sec-  
onds in 10 millisecond steps.  
3
4
Figure 5.31 Output Limiter Window  
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DBC Network Bridge  
5.3.10 Outputs Button  
Locate the Outputs button at the top-right of the Advanced Form Signal-Path  
window. Press this button to view all the output channels’ processing (Figure  
5.32).  
Figure 5.32 Outputs Window  
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DBC Network Bridge  
board is routed to the two input DSPs. The processors collect 16 samples  
of audio, then process the audio as a 'brick' of data. After the input DSPs  
have processed the data, they transfer the audio bricks to shared memory.  
The two output DSPs then retrieve the audio from memory and do the  
required output processing. The audio is then sent serially from the DSPs  
serial ports either to the monitor output or the CobraNet outputs.  
The DSP processors have a 30 MHz clock, while serial digital audio is  
locked to serial clock (3 MHz) and frame sync clock (48 KHz) supplied  
from the Input board.  
• DSP Interface: The control processor boots all of the DSP processors  
via this interface. Additionally, the control processor sets all audio pro-  
cessing controls and receives all meter data over this port.  
5.4 Technical Description  
Following is a technical description of the operation of the DBC Network  
Bridge. Please refer to the System Block Diagram (Figure 4.24).  
• Real Time Clock: An internal real time clock allows Presets to be  
called based upon a real time. The event scheduler works independently of  
the computer and can recall a specific Preset either as a one-time function  
or a repeatable event with a specific start time and repeat rate. The clock is  
capable of retaining the correct time for up to 45 days without power  
applied the DBC Network Bridge.  
Audio  
Input Section  
Each audio input signal first passes through a balanced filter designed to  
eliminate RF interference. The RF filters are a balanced network of chokes,  
ferrite beads, and capacitors that attenuate both common-mode and differ-  
ential-mode signals above 500 kHz. Input isolation transformers are used  
for the digital AES/EBU inputs.  
An interface to the System Controller board allows programming of the  
DSPs, control updates, and metering information to be passed to the out-  
side world. The DSPs depend upon the System Controller for program-  
ming upon reset or initial power, as there is no nonvolatile memory on  
board.  
• Front Display: The control processor communicates to the front dis-  
play via a serial interface. All LED updates and display information is  
passed to the front panel in this manner. The control processor monitors  
the front-panel switches.  
Analog Auxiliary Inputs: The balanced signal then enters the input  
switching circuit. This circuit can insert a 25dB pad for line level signals.  
The signal is filtered again to eliminate lower frequency RF energy such as  
interference from the AM broadcast band.  
Output Section  
• Power Interface: The System Controller board receives voltages from  
the power supply and routes them to the Input and DSP boards. A regulator  
creates the +10V available for the Control Port.  
Output serial digital audio from the DSP board is sent to the output board  
for conversion and analogue processing. The serial digital audio is com-  
prised of two channels of 24-bit signals. Each DAC converts the audio data  
stream into two differential output channels. A differential amplifier filters  
the DAC’s audio output and provides single-ended audio to a gain stage  
that sets the full scale output of the DAC. A single-ended-to-differential  
stage provides a 50-ohm output.  
A discrete preamp stage takes the balanced input signal and provides 13 to  
45 dB of voltage gain adjustable by a rear panel potentiometer. The preamp  
output provides a single-ended voltage output that is then coupled to a sin-  
gle-ended-to differential amplifier that also provides the bias offset needed  
by the A/D converter.  
• Control Port:  
External events can be either generated or monitored via this port and used  
to control or signal some function within the unit. Sixteen digital outputs,  
eight digital inputs, and eight analog inputs provide access to the unit. cur-  
rent-limited voltages (+5V and +10V) are provided to power external  
circuits.  
A 24-bit high-resolution A/D converter samples the input audio at 48 kHz.  
The audio processing is set to provide +20dBu as full scale, allowing full  
utilization of the dynamic range of the converter. Each converter supplies a  
two-channel digital audio stream to the DSPs for processing. One A/D  
converter acts as a master to supply sampling clocks to the rest of the sys-  
tem. A 12.288 MHz oscillator (256 times the 48 kHz sampling rate) acts  
as the master clock source.  
Control and Interface  
System Controller  
The System Controller board provides interface to the outside world as well  
as providing all of the program storage and initialization.  
Digital Inputs:  
8 AES/EBU Digital Inputs via DB25 with Dolby 778 configuration.  
Analog Inputs:  
At reset, the control processor uses boot code from nonvolatile flash mem-  
ory. Program code is then transferred to fast RAM and the processor  
begins to run. Each DSP processor is then booted via the system interface  
and upon successful booting of all the DSPs, audio processing begins.  
Any fader in the unit can be controlled via one of these inputs. A  
10VDC swing allows the control to vary from null to full scale. IQ  
software controls provide limiting of the fader value in the unit.  
Digital Inputs: There’s also a digital input via DB25, analog mux.  
DSP Processing Section  
Four DSP processors supply all of the digital audio processing in the unit.  
Serial digital audio from the input converters is sent to the DSP board for  
processing. Digital audio from either the Input board or the CobraNet  
• Flash Memory Storage: In addition to storing program code for the  
control and DSP processors, flash memory provides storage for all non-  
volatile data including Presets and setting.  
.
Operation Manual  
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DBC Network Bridge  
6 Troubleshooting  
CONDITION: Power indicator is  
off.  
CONDITION: Input LEDs are off.  
INPUT  
POSSIBLE REASON:  
POWER  
POSSIBLE REASON  
4
6
6
1
1
2
2
3
3
5
8
8
7
7
•
•
•
•
The unit is not receiving an analog or dig-  
ital (CobraNet) input signal. Check  
cables, cable wiring, and connections.  
•
•
The unit has lost AC power.  
AES/EBU  
DATA  
The unit is not plugged into the power  
receptacle.  
OUTPUT  
The source feeding the DBC Network  
Bridge is not producing a signal. Check  
its output signal.  
4
5
The cable between the signal source and  
the DBC Network Bridge is defective.  
Replace or repair it.  
CONDITION: AES/EBU indica-  
tor is off, even though the unit is  
being fed an AES/EBU signal.  
Addressing has not been set up correctly.  
Please review Section 1.2.  
POWER  
POSSIBLE REASON  
•
The AES input has not been selected,  
either from the front panel or in IQwic  
software.  
AES/EBU  
DATA  
CONDITION: Output LEDs are off  
but Input LEDs are flashing.  
INPUT  
CONDITION: Data indicator is  
off, even though the unit is con-  
nected to a network.  
POSSIBLE REASON:  
4
6
6
1
1
2
2
3
3
5
8
8
7
7
•
In IQwic, Signal Path tab, Cinema Sur-  
round form, the output path has not been  
set up.  
POSSIBLE REASON:  
POWER  
OUTPUT  
•
Unit is not receiving data. Check net-  
work addressing of all components.  
AES/EBU  
DATA  
4
5
•
Note: Data indicator flashes only when  
the amplifier is polled for data, or is  
polled to see whether it is online.  
Additional Error Checking  
Internal errors are automatically displayed on the LCD Display Screen. If an error is displayed, call Tech Support at  
Crown and provide them the error number.  
The CobraNet Setup window (Section 5.2.1) describes a group of error indicators that show errors associated with  
CobraNet status.  
page 70  
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DBC Network Bridge  
6 Troubleshooting  
CONDITION: Both LEDs flashing.  
CONDITION: IN USE/CONDUCTOR LED does not  
light, even though the network cable is plugged in.  
POSSIBLE REASON:  
•
Fatal error.  
POSSIBLE REASON:  
•
•
Ethernet link is broken.  
Network connection is 10 Megabits instead of 100 Megabits.  
LINK/  
ACT  
IN USE/  
COND  
LINK/  
ACT  
IN USE/  
COND  
CONDITION: Computer does not communicate with  
the network devices.  
CONDITION: LINK/ACTIVITY LED does not light,  
even though the network cable is plugged in.  
POSSIBLE REASON:  
POSSIBLE REASON:  
•
•
Incorrect wiring. See Section 1.1.1 on wiring.  
IP Addressing is not done correctly. See Section 1.2 on addressing  
•
•
Ethernet link is broken.  
Network connection is 10 Megabits instead of 100 Megabits.  
LINK/  
ACT  
IN USE/  
COND  
rules.  
On the connector are two LEDs. The left LED (IN USE/CONDUCTOR) lights yellow when the port is in use and will  
blink if the device is also the conductor (the CobraNet timing-master device). The right LED (LINK/ACTIVITY) lights  
green when link is established and blinks when network activity is detected. Both LEDs flash yellow in unison to  
report a fatal error.  
Operation Manual  
page 71  
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DBC Network Bridge  
6 Troubleshooting  
If the DBC Network Bridge seems to be functioning in unex-  
pected ways, go to the Signal Path tab and select  
Advanced. If the unit is set up for Preset 32, Standard Cin-  
ema Setup, only four icons in each channel should be lit.  
These icons are input level, input delay, input path filter, and  
output level (as in Figure 6-1). If other icons are lit as in the  
example Figure 6-2, the unit is no longer functioning as a  
cinema bridge, but as a mixer.  
To return to the normal Cinema Setup, go to the  
Unit Presets tab and select Preset 32, Standard Cinema.  
Figure 6.2 Example of Advanced Signal Path Window with Extra Icons Enabled  
Figure 6.1 Advanced Signal Path Window with Preset-32 Icons Enabled  
page 72  
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DBC Network Bridge  
7 Specifications  
Audio  
Dynamic Range  
> 108 dB (A-weighted, 20 Hz-20 kHz)  
24-bit, 48 kHz  
Digital Sampling  
Frequency Response  
Total Harmonic Distortion  
Common Mode Rejection  
0.5 dB, 20 Hz-20 kHz  
< 0.05% THD+N (1 kHz, 0 dBu)  
50 dB at 60 Hz (typical)  
> 80 dB at 10 kHz  
Crosstalk  
Maximum Input Level  
+32 dBu (line) or +7 dBu (mic)  
Maximum Output Level  
+20 dBu  
+20 dB to –12 dB (add 25 dB for mic setting)  
20 kilohms balanced, 10 kilohms unbalanced  
100 ohms balanced, 50 ohms unbalanced  
Analog: 1.13 mS. Digital: See Table 5 to the right  
24-bit 96 kHz Cirrus Logic  
Analog Auxiliary Input Gain Range  
Input Impedance  
Output Impedance  
Latency (analog, digital inputs)  
A/D, D/A Converters  
Digital Input  
Table 5  
Latency vs Sample Rate  
Sample rate  
32 kHz  
Latency  
2.74 mS  
2.36 mS  
2.28 mS  
1.81 mS  
AES/EBU, 24-bit, 32-96 kHz. Onboard sample rate converter  
Onboard TCP/IQ, compatible with standard 100Mb Ethernet hardware  
24-bit conversion with 32-bit, floating-point DSP processing  
44.1 kHz  
48 kHz  
96 kHz  
Network  
DSP  
Control Port  
Power Supply  
+5 VDC and +10 VDC outputs. Total output current 1 A.  
< 0.1 V  
Monitor Output Logic Low  
Monitor Output Logic High  
Input Impedance  
10 V (via internal pull-up). Output current limited to 10 mA max per pin  
> 50 kilohms  
< 0.5 V  
Input Logic Low  
> 5 V  
Input Logic High  
0 to 10 V (for inputs 9-16 only)  
25 V  
Input Analog Range  
Max Input Voltage  
Operation Manual  
page 73  
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DBC Network Bridge  
7 Specifications  
Power  
Required AC Mains  
Universal AC input. Operates from 100 VAC to 240 VAC at 50/60 Hz, 24W nominal.  
15A IEC AC power inlet  
AC Line Connector  
Mechanical  
Cooling  
Convection cooled, no vents, no fans  
19 in. (48.3 cm) W x 1.75 in. (4.4 cm) H x 16 in. (40.6 cm) D  
15.3 lbs (6.9 kg)  
Dimensions  
Net Weight  
page 74  
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DBC Network Bridge  
8 Appendix A: TCP-IQ Network Basics  
Example:  
8.1 Glossary  
Suppose the IP ADDRESS of a device is 126.126.17.42  
and the SUBNET MASK is 255.255.0.0.  
The following glossary explains network terminology. It is  
arranged in logical order rather than alphabetical order.  
That means, (126.126) is the NETWORK ID. The remaining  
set of numbers (17.42) is the HOST ID. If your audio net-  
work stands alone (it is not part of a larger network) then  
the HOST ID identifies each device in the network.  
Network: A group of interconnected components, such  
as a central computer, network switching equipment, and  
other computers or devices.  
TCP/IQ network: A network made of a computer, network  
switching equipment, and other audio devices such as IQ-  
PIP cards plugged into power amps. Since each I-Tech  
amp connects directly to a network, each amp is also a  
network component.  
If your audio network is part of a venue’s larger network,  
your network is actually a sub-network or subnet. In this  
case, the HOST ID can be further divided into two or more  
parts. The first part is the SUBNET ID. The other part is the  
DEVICE ID. The first part of the HOST ID identifies the sub-  
net of your audio system, and the remaining part identifies  
the particular device within that subnet.  
Subnet: A small network within a larger network. For  
example, a TCP/IQ audio network might be a subnet of a  
venue’s network, which could include computers through-  
out the building. Or an audio network might be divided  
into subnets. For example, one audio subnet might be for  
the house system and another audio subnet might be for  
the paging system.  
So in this case, a complete IP address is in the form  
NETWORK ID - SUBNET ID - DEVICE ID.  
All devices in the network have the same network ID. All  
devices in a subnet have the same subnet ID.  
IP address: An identifier for a computer or device on a  
TCP/IP network. Each device in a network has its own IP  
address to identify it. Example: 126.126.17.42. Networks  
using the TCP/IP protocol route messages based on the IP  
address of the destination. An IP address is made of four  
numbers separated by periods. Each number can be zero  
to 255. The last number can never be a zero or 255. For  
example, 126.126.17.1 could be an IP address.  
There are many resources available on the Internet for IP  
and subnet calculation. For a stand-alone system, Crown  
has provided a worksheet of a tested configuration in Sec-  
tion 1.2.5.  
DHCP (Dynamic Host Configuration Protocol): This  
is a protocol for automatically assigning IP addresses to  
devices on a network. With dynamic (DHCP) addressing, a  
device might have a different IP address every time it con-  
nects to the network. If a computer is NOT connected to a  
network with a DHCP server, the computer will place a  
default network ID into the TCP/IP address and Subnet  
Masks.  
126.126.17.0 would not be a valid IP address.  
A TCP/ IP or IP address has two parts: the NETWORK ID  
and the HOST ID. The NETWORK ID identifies the network,  
and the HOST ID identifies either the subnet and device, or  
just the device if there is no subnet.  
The subnet mask is a code that indicates which part of  
the TCP/IP address is the NETWORK ID and which part is  
the HOST ID. In subnet-mask code, 255 means “This part  
of the address is the NETWORK ID”.  
TCP/IQ does not use DHCP. A computer attached to a  
TCP/IQ network must have its IP addresses assigned stati-  
cally (manually).  
Operation Manual  
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DBC Network Bridge  
8.2 TCP/IQ Network Basics  
TCP/IQ Tis a network based protocol that has the ability to control and  
monitor IQ components over a common TCP/IP network. For IQ com-  
ponents that have CobraNet capability, TCP/IQ has the ability to control  
and monitor these IQ components over the same Ethernet network used  
for CobraNet audio, resulting in a single Category-5 connection for  
control, monitoring, and digital audio. Figure 8.1 shows a typical  
TCP/IQ network.  
DBC Network Bridge  
TCP/IQ offers a number of advantages over other non-network commu-  
nications platforms.  
• The use of “off-the-shelf” networking hardware. This tech-  
nology makes use of network connectivity and hardware commonly  
used in the computer industry, making it both low-cost and readily  
available.  
• Better Performance. The capacity for real-time display of meters is  
greatly enhanced through the use of the wide-bandwidth network.  
• Single connection for both CobraNet audio and IQ commu-  
nications. Gone are the days of multiple connections to a component  
for audio and control. A single CAT 5 connection handles it all.  
Some of the features of TCP/IQ include:  
• Ability to quickly discover all IQ components connected to the net-  
work.  
• Synchronization of multiple control points on a network.  
• Control and monitor of IQ components on different Local Area Net-  
works (LANs) through the use of an IP router.  
CTs 600  
CTs 1200  
CTs 2000  
CTs 3000  
Computer  
Laptop  
• Component firmware upgrades via the network.  
Ethernet Networks are established through the use of either a hub or a  
switch. These devices are centralized in the network and transfer the  
Ethernet data from point to point. Ethernet data is transferred in data  
packets that have addresses coded into their structure. Hubs and  
switches decipher these addresses and route the data packets to the  
appropriate component. Hubs do this by taking packets from any port  
and sending them out all other ports. Switches, on the other hand, are  
more intelligent and examine each packet’s address, sending that packet  
only to the addressed component. This results in a much more efficient  
data flow. TCP/IQ depends on the use of 100Mb switches and their use  
is highly encouraged. 100Mb or 100Base-T switches are required in  
CobraNet networks.  
100Mb Switch  
Figure 8.1 A TCP/IQ Network  
page 76  
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DBC Network Bridge  
Communications between networks is allowed, but requires the use of a  
special piece of equipment called an IP Router. The router acts as a  
Gateway to allow this communication to exist. Any data traffic that is to  
go to the other network is routed through the IP Router. The CobraNet  
data is held behind but IP data goes through.  
Each IQ Component has three identifiers that are used in the TCP/IQ  
system:  
• Media Access Control (MAC) Address  
• Internet Protocol (IP) Address  
• IQ Address  
Computer  
Computer  
Let’s explain each identifier.  
Media Access Control (MAC) Address: This is a physical address  
that specifies a specific physical network component. This address is  
predefined during manufacture and cannot be modified. No two network  
components have the same MAC address and each component is  
uniquely identified by its MAC address. This 48 bit address is located  
on the outside of every IQ component and is shown in hexadecimal for-  
mat as 6 two-byte octets such as: 00-0A-40-00-DC-2F  
100Mb Switch  
IP Router  
100Mb Switch  
Wireless  
Access Point  
Internet Protocol (IP) Address: The IP address of a component is  
assigned during the setup of the network and identifies the IQ compo-  
nent to a larger audience. Because the MAC address is limited to a sin-  
gle physical LAN, communications between LANs is impossible solely  
through the use of the MAC address. The IP address allows compo-  
nents and controllers on other networks to communicate with each  
other through the use of an IP Router as shown in Figure 8.2.  
PDA  
Wireless  
Devices  
This allows the network designer to isolate network traffic from each  
other. For example, when using wireless devices to control IQ compo-  
nents, the bandwidth limitation of wireless devices will not allow them  
to reside on the same network with CobraNet. As a result, the use of an  
IP router and a separate network allows the wireless controllers to  
access the IQ components through the router using IP addressing. The  
IP address appears as four numbers (0-255) separated by periods, such  
as: 126.126.0.1  
Figure 8.2 Multiple Network Communication Via an IP Router  
IQ Address: TCP/IQ components will be addressed with a unique  
number from 1 to 65,535 and are assigned within the IQ software. A  
separate utility is then run which queries the network and establishes  
what IQ components and their associated MAC addresses are present.  
An IP Address and IQ Address can then be assigned to each IQ compo-  
nent.  
Operation Manual  
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DBC Network Bridge  
The MAC address does uniquely identify each TCP/IQ component and  
can be used to establish the physical location of the unit. The binding of  
the MAC address to the IQ address through the use of the TCP/IQ Utility  
assures that each TCP/IQ component is physically in the right position.  
The use of the IP address establishes the Local Area Network (LAN) and  
what components reside within that LAN. The Subnet Mask associated  
with each IQ Component tells what IP addresses can be assigned to a  
particular LAN. The Subnet Mask is also four numbers (0-255) sepa-  
rated by periods. For example, a subnet mask of 255.255.0.0 and an IP  
address of 126.126.1.123 says that all IP addresses in that LAN are in  
the IP address range of 126.126.1.1 to 126.126.1.255.  
If a TCP/IQ controller is on a different network than the TCP/IQ compo-  
nents, communications must occur through an IP router. TCP/IQ dis-  
covery requires the use of broadcast Ethernet data packets onto the  
network. These broadcast commands cannot be done through an IP  
router, therefore a Discovery Proxy is required. The establishment of  
this proxy is done in TCP/IQ by naming the IP address of a known com-  
ponent on the component network as the Discovery Proxy within IQWin  
or TCPIQ Util.  
Figure 8.3 Star Network Topology  
8.3 A Closer Look at CobraNet  
CobraNet is a licensed technology developed by Peak Audio, Inc. con-  
sisting of proprietary communications protocol, firmware and hardware.  
It allows reliable, deterministic transmission of digital audio over a  
100Base-T Fast-Ethernet network.  
This section provides an overview of CobraNet. Peak Audio has pro-  
vided a number of technical papers that describe CobraNet in detail.  
These papers are available at http://www.PeakAudio.com.  
8.3.1Fast Ethernet  
(100Base-T)  
Fast Ethernet (100Base-T) uses a hub to interconnect all network nodes  
to form a star topology (see Figure 8.3). In the star topology all PCs are  
connected to a centralized hub. Messages are sent from the originating  
PC to the hub, which then transmits the message either to the whole  
network or, if a switched hub is used, to the destination PC only. Hubs  
may be active or switched.  
In larger Fast Ethernet networks, additional hubs, concentrators, and  
other network hardware are used to form a larger network, as shown in  
Figure 8.4.  
Figure 8.4 Multi-Star Topology  
page 78  
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DBC Network Bridge  
8.3.6 Switched Networks  
Today, commonly available networking cards are 10/100Base-T  
capable, which allows them to be used on either 10BaseT or 100Base-T  
networks.  
8.3.4 Bundles and Audio Channels  
A more complex CobraNet network can be built using Ethernet  
Switches.2 Ethernet switching technology is more sophisticated than  
hubs. Switches do not simply broadcast each and every packet to all  
nodes. Instead, they can interrogate each incoming packet transmission  
to determine its destination and (very quickly) transmit the data to only  
that destination port. This allows for more overall network traffic. In  
effect each port has 100MB of bandwidth and the overall network can be  
as large as 100MB times the number of ports on the network.  
All audio channels are packaged into groups called Bundles (formerly  
called Network Channels) for transmission over the Ethernet network.  
Each CobraNet device has the ability to send and receive a fixed number  
of Bundles. The Bundle number tells the CobraNet conductor which spe-  
cific CobraNet device is trying to communicate with which other Cobra-  
Net device(s) over the network. A given Bundle may have only one  
transmitter that places it onto the network. Unicast Bundles may have  
only a single receiver. Multicast Bundles may have multiple receivers.  
Fast Ethernet distance limitations apply to CobraNet installations: 100  
meters over Cat-5 copper cable, 2 kilometers over multimode fiber. Pro-  
prietary Fast Ethernet via single mode fiber solutions can reach even  
further.  
8.3.2 Audio Specs  
CobraNet implements fixed sample rates of 48 kHz or 96 kHz. Each  
channel may be selected to transmit 16-, 20- or 24-bit audio data as  
desired. The transmitter and receiver buffering required for reliable  
transmission is fixed at 256 samples yielding a network transmission  
latency of 5.333 ms (256 samples at 1/48 kHz per sample).  
Switched networks allow both multi-cast and uni-cast CobraNet Bun-  
dles. Uni-cast transmissions can only be received by a single node and  
are typically used for point-to-point routing. This technique leverages  
Ethernet switching technology to significantly conserve overall network  
bandwidth and in-turn allow many more Bundles and Audio Channels.  
Bundles from 1 to 255 are designated as “multicast” (“broadcast”) Bun-  
dles. This means that they are transmitted to multiple receivers. This  
type is most used on “repeater” networks limited to 64 channels.  
Bundles from 256 to 65,279 are “uni-cast”. This means that they are  
transmitted to one and only one receiver. This type is most used on  
“switched” networks requiring more than 64 channels.  
8.3.3 The Conductor  
Another enhancement available with most switched network environ-  
ments is “full-duplex” links. A full-duplex link allows simultaneous  
send and receive over the same Ethernet connection. This allows simul-  
taneous send and receive of up to 64 channels per node for a total of  
128 channels. That said, please keep in mind that today’s CobraNet  
node designs are only capable of 64 channels (32 in and 32 out).  
A CobraNet system is coordinated by one of the devices called the Con-  
ductor. When two or more CobraNet devices are interconnected prop-  
erly, one of the devices will be elected the network conductor based on a  
priority scheme. The Conductor indicator will light on the CobraNet  
device that is serving as the conductor.  
A Bundle can carry up to 8 audio channels. The usual assignment is 8  
channels at 20 bits. Using less audio channels is possible but maximum  
size bundles are suggested for most efficient utilization of network band-  
width. If 24-bit data is desired, then only 7 audio channels can be loaded  
into a single Bundle.  
Deterministic transmission on Ethernet is enabled by a protocol that  
implements a “Conductor” for control of time-division multiplexing and  
clock recovery. The “Conductor” periodically broadcasts a well-defined  
“beat” packet onto the network for each transmitter and receiver to  
recover synchronous timing information. The “beat” also includes  
information as to which addresses can transmit at certain time slots  
within the “beat” period.  
The combination of switching and full-duplex technologies in switched  
CobraNet networks allows up to 128 channels per node and greater  
than 3000 individual uni-cast channels. There is no limit to the number  
of active receivers on a switched CobraNet network. Switched networks  
also allow control traffic such as PCs, to coexist on the same network as  
CobraNet devices.  
8.3.5 Repeater Networks  
CobraNet can operate on “repeater” networks and more complex  
“switched” networks. Repeater networks use low-cost Ethernet hubs.1  
On this type of an Ethernet network, all packets are broadcast to all con-  
nected nodes. CobraNet multi-cast and uni-cast Bundles can be  
assigned but because of the simpler repeater-type hubs, even uni-cast  
transmissions are broadcast to all nodes. Therefore, a maximum of 8  
full-loaded Bundles (64 audio channels) are allowed on the entire net-  
work. More Bundles may be allowed if they are loaded with less than the  
full eight audio channels. There is no limit to the number of active  
receivers on a repeater network. Generally, a repeater based CobraNet  
network must be dedicated to CobraNet traffic only to guarantee reliable  
transmission of audio packets.  
The Conductor regulates the CobraNet digital audio traffic on the  
CobraNet network. Each transmitter is given a “permission” to transmit  
in a given time-slot within the Conductor controlled isochronous cycle-  
time. The time-slot is determined by the assigned bundle priority.  
Higher bundle priorities receive lower-numbered positions and are  
transmitted first. The “Receiver Count” monitor indicates how many  
devices are receiving the digital audio bundle. The “Active” indicator  
indicates whether the particular Bundle is being actively transmitted  
onto the network.  
1 See Tested Ethernet Products on the Peak Audio website for a list of rec-  
ommended Ethernet repeaters.  
2 See Tested Ethernet Products on the Peak Audio website at  
www.peakaudio.com/CobraNet for a list of recommended Ethernet  
switches.  
Operation Manual  
page 79  
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9 Service  
Crown amplifiers are quality units that rarely require ser-  
vicing. Before returning your unit for service, please con-  
tact Crown Technical Support to verify the need for  
servicing.  
5. Record the SRA number for future reference. The  
SRA number can be used to check the repair status.  
2. Carefully place your product with the product's front  
panel facing the same direction as arrows indicate.  
of authorized service centers in your area can be obtained  
from Crown Factory Service, or online from  
http://www.crownaudio.com/support/servcent.htm.  
3. Reset center cushion down over top of product's  
chassis. The foam-in-place packing was molded to  
accommodate different chassis depth sizes. If your  
product's chassis does not completely fill the foam-  
in-place cavity, you may use a soft but solid packing  
material (such as paper or bubble wrap) behind the  
chassis.  
9.2.4 Packing Instructions  
9.2.2 Factory Service  
Important: These instructions must be followed. If they  
are not followed, Crown Audio, Inc. assumes no respon-  
sibility for damaged goods and/or accessories that are  
sent with your unit.  
This unit has very sophisticated circuitry which should  
only be serviced by a fully trained technician. This is one  
reason why each unit bears the following label:  
Crown accepts no responsibility for non-serviceable  
product that is sent to us for factory repair. It is the  
owner’s responsibility to ensure that their product is ser-  
viceable prior to sending it to the factory. Serviceable  
product list is available at  
http://crownweb.crownintl.com/crownrma/.  
For more information, please contact us direct.  
CAUTION: To prevent electric shock, do not  
remove covers. No user serviceable parts  
inside. Refer servicing to a qualified technician.  
1. Fill out and include the Crown Audio Factory Ser-  
vice Information sheet in the back of this manual.  
4. Enclose the completed Crown Audio Factory Service  
Information form (or securely attach it to the outside  
of carton) and re-seal the shipping pack with a  
sturdy carton sealing tape.  
Complete the Crown Audio Factory Service Information  
form, in the back of this manual, when returning a Crown  
product to the factory or authorized service center. The  
form must be included with your product inside the box  
or in a packing slip envelope securely attached to the  
outside of the shipping carton. Do not send this form  
separately.  
2. Do not ship any accessories (manuals, cords, hard-  
ware, etc.) with your unit. These items are not  
needed to service your product. We will not be  
responsibility for these items.  
A Service Return Authorization (SRA) is required for  
product being sent to the factory for repair. An SRA can  
be completed online at www.crownaudio.com/support/  
factserv.htm. If you do not have access to the web, please  
call Crown’s Customer Service at 574.294.8200 or  
800.342.6939 extension 8205.  
9.2.5 Estimate Approval  
Approval of estimate must be given within 30 days after  
being notified by Crown Audio Inc. Units still in the pos-  
session of Crown after 30 days of the estimate will  
become the property of Crown Audio Inc.  
3. When shipping your Crown product, it is important  
that it has adequate protection. We recommend you  
use the original pack material when returning the  
product for repair. If you do not have the original  
box, please call Crown at 800.342.6939 or  
Warranty is only valid within the country in which the  
product is purchased.  
For warranty service, we will pay for ground shipping  
both ways in the United States. Contact Crown Customer  
Service to obtain prepaid shipping labels prior to send-  
ing the unit. Or, if you prefer, you may prepay the cost of  
shipping, and Crown will reimburse you. Send copies of  
the shipping receipts to Crown to receive reimbursement.  
Your repaired unit will be returned via UPS ground.  
Please contact us if other arrangements are required.  
9.2.6 Payment of Non-Warranty Repairs  
574.294.8210 and order new pack material. See  
instructions for “foam-in-place” shipping pack. (Do  
not ship your unit in a wood or metal cabinet.)  
9.1 International and Canada Service  
Payment on out-of-waranty repairs must be received  
within 30 days of the repair date. Units unclaimed after  
30 days become the property of Crown Audio Inc.  
Service may be obtained from an authorized service cen-  
ter. (Contact your local Crown/Amcron representative or  
our office for a list of authorized service centers.) To  
obtain service, simply present the bill of sale as proof of  
purchase along with the defective unit to an authorized  
service center. They will handle the necessary paperwork  
and repair.  
4. If you provide your own shipping pack, the mini-  
mum recommended requirements for materials are  
as follows:  
If you have any questions, please contact Crown Factory  
Service.  
9.2.3 Factory Service Shipping Instruc-  
tions:  
a. 275 P.S.I. burst test, Double-Wall carton that allows  
for 2-inch solid Styrofoam on all six sides of unit or  
3 inches of plastic bubble wrap on all six sides of  
unit.  
Crown Factory Service  
1718 W. Mishawaka Rd.,  
Elkhart, Indiana 46517 U.S.A.  
1. Service Return Authorization (SRA) is required for  
product being sent to the factory for service. Please  
complete the SRA by going to  
Remember to transport your unit in the original factory  
pack.  
Telephone:  
574.294.8200  
800.342.6939 (North America,  
Puerto Rico, and Virgin Islands only)  
b. Securely seal the package with an adequate carton  
sealing tape.  
www.crownaudio.com/support/factserv.htm. If you  
do not have access to our website, call  
1.800.342.6939, extension 8205 and we'll create the  
SRA for you.  
9.2 US Service  
Service may be obtained in one of two ways: from an  
authorized service center or from the factory. You may  
choose either. It is important that you have your copy of  
the bill of sale as your proof of purchase.  
c. Do not use light boxes or “peanuts”. Damage caused  
by poor packaging will not be covered under war-  
ranty.  
Facsimile:  
574.294.8301 (Technical Support)  
574.294.8124 (Factory Service)  
2. See packing instructions that follow.  
Using your 'foam-in-place' shipping pack  
3. Ship product to:  
9.2.1 Service at a US Service Center  
CROWN AUDIO FACTORY SERVICE  
1718 W MISHAWKA RD.  
ELKHART, IN 46517  
Note: The foam-in-place packing is molded so that there  
is only one correct position for your product.  
Internet:  
http://www.crownaudio.com  
This method usually saves the most time and effort. Sim-  
ply present your bill of sale along with the defective unit  
to an authorized service center to obtain service. They  
will handle the necessary paperwork and repair. Remem-  
ber to transport the unit in the original factory pack. A list  
1. Open carton and lift center cushion leaving both  
end-cushions in place.  
4. Use a bold black marker and write the SRA number  
on three sides of the box.  
page 80  
Operation Manual  
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10 Warranty  
UNITED STATES & CANADA  
SUMMARY OF WARRANTY  
to the actual purchase price, not including inter-  
est, insurance, closing costs, and other finance  
charges less a reasonable depreciation on the  
product from the date of original purchase. War-  
ranty work can only be performed at our autho-  
rized service centers or at the factory. Warranty  
work for some products can only be performed at  
our factory. We will remedy the defect and ship  
the product from the service center or our factory  
within a reasonable time after receipt of the defec-  
tive product at our authorized service center or  
our factory. All expenses in remedying the defect,  
including surface shipping costs in the United  
States, will be borne by us. (You must bear the  
expense of shipping the product between any for-  
eign country and the port of entry in the United  
States including the return shipment, and all  
taxes, duties, and other customs fees for such for-  
eign shipments.)  
PRODUCT. THIS INCLUDES ANY DAMAGE TO  
ANOTHER PRODUCT OR PRODUCTS RESULT-  
ING FROM SUCH A DEFECT. SOME STATES DO  
NOT ALLOW THE EXCLUSION OR LIMITATIONS  
OF INCIDENTAL OR CONSEQUENTIAL DAM-  
AGES, SO THE ABOVE LIMITATION OR EXCLU-  
SION MAY NOT APPLY TO YOU.  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY SUB-  
SEQUENT OWNER of each NEW Crown product,  
for a period of three (3) years from the date of  
purchase by the original purchaser (the “warranty  
period”) that the new Crown product is free of  
defects in materials and workmanship. We further  
warrant the new Crown product regardless of the  
reason for failure, except as excluded in this War-  
ranty.  
WARRANTY ALTERATIONS  
No person has the authority to enlarge, amend, or  
modify this Crown Warranty. This Crown War-  
ranty is not extended by the length of time which  
you are deprived of the use of the new Crown  
product. Repairs and replacement parts provided  
under the terms of this Crown Warranty shall  
carry only the unexpired portion of this Crown  
Warranty.  
Warranty is only valid within the country in which  
the product was purchased.  
ITEMS EXCLUDED FROM THIS  
CROWN WARRANTY  
DESIGN CHANGES  
This Crown Warranty is in effect only for failure of  
a new Crown product which occurred within the  
Warranty Period. It does not cover any product  
which has been damaged because of any inten-  
tional misuse, accident, negligence, or loss which  
is covered under any of your insurance contracts.  
This Crown Warranty also does not extend to the  
new Crown product if the serial number has been  
defaced, altered, or removed.  
We reserve the right to change the design of any  
product from time to time without notice and with  
no obligation to make corresponding changes in  
products previously manufactured.  
HOW TO OBTAIN WARRANTY  
SERVICE  
You must notify us of your need for warranty ser-  
vice within the warranty period. All components  
must be shipped in a factory pack, which, if  
needed, may be obtained from us free of charge.  
Corrective action will be taken within a reason-  
able time of the date of receipt of the defective  
product by us or our authorized service center. If  
the repairs made by us or our authorized service  
center are not satisfactory, notify us or our autho-  
rized service center immediately.  
LEGAL REMEDIES OF PURCHASER  
THIS CROWN WARRANTY GIVES YOU SPECIFIC  
LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER  
RIGHTS WHICH VARY FROM STATE TO STATE.  
No action to enforce this Crown Warranty shall be  
commenced after expiration of the warranty  
period.  
WHAT THE WARRANTOR WILL DO  
We will remedy any defect, regardless of the rea-  
son for failure (except as excluded), by repair,  
replacement, or refund. We may not elect refund  
unless you agree, or unless we are unable to pro-  
vide replacement, and repair is not practical or  
cannot be timely made. If a refund is elected, then  
you must make the defective or malfunctioning  
product available to us free and clear of all liens  
or other encumbrances. The refund will be equal  
THIS STATEMENT OF WARRANTY SUPERSEDES  
ANY OTHERS CONTAINED IN THIS MANUAL  
DISCLAIMER OF CONSEQUENTIAL  
AND INCIDENTAL DAMAGES  
FOR CROWN PRODUCTS.  
9/07  
YOU ARE NOT ENTITLED TO RECOVER FROM  
US ANY INCIDENTAL DAMAGES RESULTING  
FROM ANY DEFECT IN THE NEW CROWN  
Operation Manual  
page 81  
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11 Warranty (continued)  
WORLDWIDE EXCEPT USA & CANADA  
SUMMARY OF WARRANTY  
WHAT THE WARRANTOR WILL DO  
DISCLAIMER OF CONSEQUENTIAL AND  
INCIDENTAL DAMAGES  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY SUB-  
SEQUENT OWNER of each NEW Crown1 product,  
for a period of three (3) years from the date of pur-  
chase by the original purchaser (the “warranty  
period”) that the new Crown product is free of  
defects in materials and workmanship, and we  
further warrant the new Crown product regardless  
of the reason for failure, except as excluded in this  
Warranty.  
We will remedy any defect, regardless of the rea-  
son for failure (except as excluded), by repair,  
replacement, or refund. We may not elect refund  
unless you agree, or unless we are unable to pro-  
vide replacement, and repair is not practical or  
cannot be timely made. If a refund is elected, then  
you must make the defective or malfunctioning  
product available to us free and clear of all liens  
or other encumbrances. The refund will be equal  
to the actual purchase price, not including inter-  
est, insurance, closing costs, and other finance  
charges less a reasonable depreciation on the  
product from the date of original purchase. War-  
ranty work can only be performed at our autho-  
rized service centers. We will remedy the defect  
and ship the product from the service center  
within a reasonable time after receipt of the defec-  
tive product at our authorized service center.  
YOU ARE NOT ENTITLED TO RECOVER FROM US  
ANY INCIDENTAL DAMAGES RESULTING FROM  
ANY DEFECT IN THE NEW CROWN PRODUCT.  
THIS INCLUDES ANY DAMAGE TO ANOTHER  
PRODUCT OR PRODUCTS RESULTING FROM  
SUCH A DEFECT.  
WARRANTY ALTERATIONS  
No person has the authority to enlarge, amend, or  
modify this Crown Warranty. This Crown Warranty  
is not extended by the length of time which you are  
deprived of the use of the new Crown product.  
Repairs and replacement parts provided under the  
terms of this Crown Warranty shall carry only the  
unexpired portion of this Crown Warranty.  
Warranty is only valid within the country in which  
the product is purchased.  
1
Note: If your unit bears the name “Amcron,” please substitute  
it for the name “Crown” in this warranty.  
ITEMS EXCLUDED FROM THIS CROWN-  
WARRANTY  
DESIGN CHANGES  
We reserve the right to change the design of any  
product from time to time without notice and with  
no obligation to make corresponding changes in  
products previously manufactured.  
This Crown Warranty is in effect only for failure of  
a new Crown product which occurred within the  
Warranty Period. It does not cover any product  
which has been damaged because of any inten-  
tional misuse, accident, negligence, or loss which  
is covered under any of your insurance contracts.  
This Crown Warranty also does not extend to the  
new Crown product if the serial number has been  
defaced, altered, or removed.  
HOW TO OBTAIN WARRANTY SERVICE  
You must notify your local Crown importer of  
your need for warranty service within the warranty  
period. All components must be shipped in the  
original box. Corrective action will be taken within  
a reasonable time of the date of receipt of the  
defective product by our authorized service center.  
If the repairs made by our authorized service cen-  
ter are not satisfactory, notify our authorized ser-  
vice center immediately.  
LEGAL REMEDIES OF PURCHASER  
No action to enforce this Crown Warranty shall be  
commenced after expiration of the warranty  
period.  
THIS STATEMENT OF WARRANTY SUPERSEDES  
ANY OTHERS CONTAINED IN THIS MANUAL FOR  
CROWN PRODUCTS.  
9/07  
page 82  
Operation Manual  
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Crown Audio Factory Service Information  
Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517  
PLEASE PRINT CLEARLY  
SRA #: __________________(If sending product to Crown factory service.)  
Model: ____________________________________________  
Serial Number: _____________________  
Purchase Date: _____________  
PRODUCT RETURN INFORMATION  
Individual or Business Name: ____________________________________________________________________________________________________________________________________________________________  
Phone #: __________________________________________________ Fax #: ________________________________________ E-Mail: _______________________________________________________  
Street Address (please, no P.O. Boxes): _____________________________________________________________________________________________________________________________________________________  
City: __________________________________________ State/Prov: ________________________________ Postal Code: _________________ Country: _________________________  
Nature of problem: ___________________________________________________________________________________________________________________________________________________________________  
_________________________________________________________________________________________________________________________________________________________________________________  
_________________________________________________________________________________________________________________________________________________________________________________  
Other equipment in your system: _________________________________________________________________________________________________________________________________________________________  
If warranty is expired, please provide method of payment. Proof of purchase may be required to validate warranty.  
PAYMENT OPTIONS  
I have open account payment terms. Purchase order required. PO#: __________________________________  
COD  
Credit Card (Information below is required; however if you do not want to provide this information at this time, we will contact you when your unit is repaired for the information.)  
Credit card information:  
Type of credit card:  
MasterCard  
Visa  
American Express  
Discover  
Type of credit card account:  
Personal/Consumer  
Business/Corporate  
Card # ______________________________________________ Exp. date: _____________ * Card ID #: __________________________  
* Card ID # is located on the back of the card following the credit card #, in the signature area. On American Express, it may be located on the front of the card. This number is required to process the charge to your account. If you do not want to provide  
it at this time, we will call you to obtain this number when the repair of your unit is complete.  
Name on credit card:  
____________________________________________________________________________  
Billing address of credit card: __________________________________________________________________________  
__________________________________________________________________________  
__________________________________________________________________________  
Operation Manual  
page 83  
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page 84  
Operation Manual  
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