Ross DED-8420 User Manual

Ross Video Limited

DED-8420

Dolby® E/AC-3 Decoder

User Manual

Ross Part Number: 8420DR-004
Issue: 01

DED-8420 • Dolby® E/AC-3 Decoder User Manual

• Ross Part Number: 8420DR-004

• Document Issue: 01

• Printed in Canada.

The information contained in this User Manual is subject to change without notice or obligation.

Copyright

© 2008 Ross Video Limited. All rights reserved.

Contents of this publication may not be reproduced in any form without the written permission of
openGear. Reproduction or reverse engineering of copyrighted software is prohibited.

Notice

The material in this manual is furnished for informational use only. It is subject to change without
notice and should not be construed as a commitment by Ross Video Limited. Ross Video Limited
assumes no responsibility or liability for errors or inaccuracies that may appear in this manual.

Trademarks

• is a registered trademark of Ross Video Limited.

•

is a registered trademark of Ross Video Limited.

• DashBoard Control System™ is a trademark of Ross Video Limited.

®

• Ross, ROSS, ROSS

®

• Dolby

is a registered trademark of Dolby Laboratories.

, and MLE are registered trademarks of Ross Video Limited.

• All other product names and any registered and unregistered trademarks mentioned in
this manual are used for identification purposes only and remain the exclusive property
of their respective owners.

Important Regulatory and Safety Notices

Before using this product and any associated equipment, refer to the “Important Safety Instructions”
listed below so as to avoid personnel injury and to prevent product damage.

Products may require specific equipment, and /or installation procedures be carried out to satisfy
certain regulatory compliance requirements. Notices have been included in this publication to call
attention to these Specific requirements.

Symbol Meanings

Warning

Caution

Notice

ESD

Susceptibility

This symbol on the equipment refers you to important operating and maintenance
(servicing) instructions within the Product Manual Documentation. Failure to heed
this information may present a major risk of damage or injury to persons or
equipment.

The symbol with the word “Warning” within the equipment manual indicates a
potentially hazardous situation, which if not avoided, could result in death or serious
injury.

The symbol with the word “Caution” within the equipment manual indicates a
potentially hazardous situation, which if not avoided, may result in minor or
moderate injury. It may also be used to alert against unsafe practices.

The symbol with the word “Notice” within the equipment manual indicates a
situation, which if not avoided, may result in major or minor equipment damage or a
situation which could place the equipment in a non-compliant operating state.

This symbol is used to alert the user that an electrical or electronic device or
assembly is susceptible to damage from an ESD event.

Important Safety Instructions

Caution

Warning

Warning

This product is intended to be a component product of the openGear 8000 series
frame. Refer to the openGear 8000 series frame User Manual for important safety
instructions regarding the proper installation and safe operation of the frame as well
as it’s component products.

Certain parts of this equipment namely the power supply area still present a safety
hazard, with the power switch in the OFF position. To avoid electrical shock,
disconnect all A/C power cords from the chassis' rear appliance connectors before
servicing this area.

Service barriers within this product are intended to protect the operator and service
personnel from hazardous voltages. For continued safety, replace all barriers after
any servicing.

This product contains safety critical parts, which if incorrectly replaced may present
a risk of fire or electrical shock. Components contained within the product’s power
supplies and power supply area, are not intended to be customer serviced and should
be returned to the factory for repair.

To reduce the risk of fire, replacement fuses must be the same type and rating.
Only use attachments/accessories specified by the manufacturer.

EMC Notices

US FCC Part 15

This equipment has been tested and found to comply with the limits for a class A Digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
users will be required to correct the interference at their own expense.

Notice

Changes or modifications to this equipment not expressly approved by Ross Video
Ltd. could void the user’s authority to operate this equipment.

CANADA

This Class “A” digital apparatus complies with Canadian ICES-003.

Cet appareil numerique de classe “A” est conforme à la norme NMB-003 du Canada.

EUROPE

This equipment is in compliance with the essential requirements and other relevant provisions of CE
Directive 93/68/EEC.

INTERNATIONAL

This equipment has been tested to CISPR 22:1997 along with amendments A1:2000 and A2:2002 and
found to comply with the limits for a Class A Digital device.

Notice

This is a Class A product. In domestic environments this product may cause radio
interference in which case the user may have to take adequate measures.

Maintenance/User Serviceable Parts

Routine maintenance to this openGear product is not required. This product contains no user
serviceable parts. If the module does not appear to be working properly, please contact Technical
Support using the numbers listed under the “Contact Us” section on the last page of this manual. All
RossGear products are covered by a generous 5-year warranty and will be repaired without charge for
materials or labor within this period. See the “Warranty and Repair Policy” section in this manual for
details.

Environmental Information

The equipment that you purchased required the extraction and use of natural resources for its
production. It may contain hazardous substances that could impact health and the environment.

To avoid the potential release of those substances into the environment and to diminish the need for
the extraction of natural resources, Ross Video encourages you to use the appropriate take-back
systems. These systems will reuse or recycle most of the materials from your end-of-life equipment in
an environmentally friendly and health conscious manner.

The crossed-out wheeled bin symbol invites you to use these systems.

If you need more information on the collection, reuse, and recycling systems, please contact your local
or regional waste administration.

You can also contact Ross Video for more information on the environmental performances of our
products.

Contents

Introduction 1-1

In This Chapter .......................................................................................................................1-1

A Word of Thanks....................................................................................................1-1

Overview ..................................................................................................................1-2

Functional Block Diagram .......................................................................................1-3

Features ....................................................................................................................1-3

Documentation Terms ..............................................................................................1-3

Installation and Setup 2-1

In This Chapter .......................................................................................................................2-1

Static Discharge........................................................................................................2-1

Unpacking ................................................................................................................2-1

Rear Module Installation (Optional) ........................................................................2-2

Board Installation .....................................................................................................2-3

BNC Labels ..............................................................................................................2-3

Cable Connections....................................................................................................2-3

User Controls 3-1

In This Chapter .......................................................................................................................3-1

DIP Switch Locations...............................................................................................3-2

DIP Switches ............................................................................................................3-2

LEDs.........................................................................................................................3-4

Modes of Operation..................................................................................................3-5

Control and Monitoring 4-1

In This Chapter .......................................................................................................................4-1

Specifications 5-1

In This Chapter .......................................................................................................................5-1

Service Information 6-1

In This Chapter .......................................................................................................................6-1

DED-8420 User Manual (Iss. 01) Contents • i

DashBoard Control System ......................................................................................4-1

The Menu System.....................................................................................................4-1

Technical Specifications...........................................................................................5-2

Encoder Channel Assignment for Dolby® E Encoding ............................................5-3

Troubleshooting Checklist .......................................................................................6-1

Power LED Conditions ............................................................................................6-2

Warranty and Repair Policy .....................................................................................6-2

Ordering Information 7-1

DED-8420 and Related Products........................................................................................... 7-1

ii • Contents DED-8420 User Manual (Iss. 01)

Introduction

In This Chapter

This chapter contains the following sections:

• A Word of Thanks

• Overview

• Functional Block Diagram

• Features

• Documentation Terms

A Word of Thanks

Congratulations on choosing the openGear DED-8420 Dolby® E/AC-3 Decoder. The DED-8420 is
part of a full line of Digital Products within the openGear Terminal Equipment family of products,
backed by Ross Video’s experience in engineering and design expertise since 1974.

You will be pleased at how easily your new DED-8420 fits into your overall working environment.
Equally pleasing is the product quality, reliability and functionality. Thank you for joining the group
of worldwide satisfied Ross Video customers!

Should you have a question pertaining to the installation or operation of your DED-8420, please
contact us at the numbers listed on the back cover of this manual. Our technical support staff is always
available for consultation, training, or service.

DED-8420 User Manual (Iss. 01) Introduction • 1-1

Overview

The DED-8420 is a Dolby® E/AC-3 decoder with Sample Rate Conversion (SRC) designed for
broadcast use. The DED-8420 takes a Dolby encoded signal and breaks it down into discrete channels,
which are presented at it’s output as AES signal streams. It also extracts the meta-data embedded in
the input audio signal and presents this on the meta-data output.

The DED-8420 card accepts Dolby E, AC-3 encoded or PCM input signals and supports audio
sampling frequencies from 30kHz to 48kHz. Cable equalization and reclocking techniques enable the
DED-8420 to recover the incoming digital audio signal reliably.

When the incoming signal is Dolby E, the DED-8420 outputs the decoded AES pairs as follows:

• AES out1: Left, Right

• AES out 2: Center, Low Frequency Effect (LFE)

• AES out 3: Left surround, Right surround

• AES out 4: Secondary Audio Program

• AES out 5: LoRo (conventional Stereo pair) or LtRt (surround encoded stereo pair).

This is user selectable.

• AES out 6: Copy of input

• MDATA: Metadata

When the incoming signal is AC-3 encoded, the DED-8420 outputs the decoded AES pairs as follows:

• AES out1: Left, Right

• AES out2: Center, Low Frequency Effect (LFE)

• AES out3: Left surround, Right surround

• AES out4: Nothing

• AES out 5: LoRo (conventional Stereo pair) or LtRt (surround encoded stereo pair).

This is user selectable.

• AES out 6: Copy of input

• MDATA: Nothing

If the input is PCM, the DED-8420 functions as a 1 x 3 Distribution Amplifier. The outputs are as
follows:

• AES out1: Copy of input

• AES out 2: Nothing

• AES out 3: Nothing

• AES out 4: Nothing

• AES out 5: Copy of input

• AES out 6: Copy of input

• MDATA: Nothing

The DED-8420 is fully compliant with all openGear technical specifications and DashBoard Control
System™.

1-2 • Introduction DED-8420 User Manual (Iss. 01)

Functional Block Diagram

Figure 1. Simplified Block Diagram of DED-8420

Features

The following features make the DED-8420 the best solution for Dolby decoding:

• Handles Dolby E, AC-3 and PCM signals

• 24-bit technology

• Supports audio sampling frequencies from 30kHz to 48kHz

• Fits DFR-8300 series frames

• 5 year transferable warranty

• Fully compliant with openGear specifications

Documentation Terms

The following terms are used throughout this guide:

• “Frame” refers to the DFR-8300 series frame that houses the DED-8420 card, as
well as any openGear frames.

• All references to the DFR-8300 series frames also includes all version of the 10-slot
(DFR-8310) and 20-slot (DFR-8320) frames and any available options.

• “Operator” and “User” refer to the person who uses the DED-8420.

• “Board”, and “Card” refer to the DED-8420 card itself, including all components

and switches.

• “System” and “Video system” refer to the mix of interconnected production and

DED-8420 User Manual (Iss. 01) Introduction • 1-3

terminal equipment in which the DED-8420 operates.