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2A-2 audio bandwidth while 112/128 kbps calls provide 15-20 kHz audio bandwidth. The 112/128 calls combine or "inverse multiplex" the two switched 56 or 64 kbps ISDN B channels together to provide a higher bandwidth transmission path. Sites that conform to the international inverse multiplexing standard Bonding Mode 1 can be accessed with your Dolby Fax system. Refer to the glossary in Appendix E for more information on inverse multiplexing. The DP503 also offers Dolby Digital (Dolby AC-3) in mo
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2A-3 Installation involves: x Equipment mounting x Audio connections x Data / Status / Control connections Using the “Y” cable to interconnect the DP503, DP524 and ISDN unit x Applying power x Analog audio calibration x ISDN connections 2A.4 Quick Start for ISDN Setup Note: Refer to Section 5 for a comprehensive procedure and details on user interface. Section 6.3 is devoted to ISDN Setup. Refer also to Appendices D & E for ISDN background information. 1. Select ISDN Setup by pressing SHIFT + DI
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2A-4 Parameter Value Algorithm Type AC-2 Data Rate 256 Channel Mode 2C Sample Rate 48 Aux Rate 12 ISDN (Inverse Multiplexing type) BONDING-1 64 4. Save the directory entry. 2A.6 Quick Start for Placing Dolby Fax Calls Refer to Section 5.4.3 for a comprehensive procedure on making calls. Note 1. Press DIR. USE 2. Select . 3. Find the desired directory listing by scrolling with the ÇÈ keys. 4. Press ENTER. The call will be initiated. Look for ÆÆLOCATION on the display to confirm that the call is e
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Model DP503
Two Channel AC-2/AC-3/MPEG
Digital Audio Encoder and
Dolby Fax System
Users' Manual
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Users' Manual For Model DP503 Two Channel AC-2/AC-3/MPEG Digital Audio Encoder and Dolby Fax System Dolby Laboratories Incorporated U.S.A. 100 Potrero Avenue, San Francisco, CA 94103 Tel: 415-558-0200; Fax: 415-863-1373 www.dolby.com U.K. Wootton Bassett, Wiltshire SN4 8QJ Tel: 01793-842100; Fax: 01793-842101 WARRANTY INFORMATION, USA: warranty on the product covered by this manual is subject to the limitations and disclaimers set forth in the warranty disclaimer originally shipped wi
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TABLE OF CONTENTS SECTION 1 INTRODUCTION 1.1 Introduction ...............................................................................................1-1 1.2 Features......................................................................................................1-2 1.3 Dolby AC-2 and Dolby Digital (AC-3) .....................................................1-2 1.4 Available Algorithms, Data Rates and Sample Rates ...............................1-3 1.5 Regulatory Notices ...............
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ii SECTION 4 INSTALLATION and LEVEL CALIBRATION 4.1 Mounting ...................................................................................................4-1 4.2 Audio Connections....................................................................................4-1 4.2.1 S/PDIF Input............................................................................4-1 4.2.2 AES/EBU Input.......................................................................4-1 4.2.3 Analog Input................
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iii 5.4 Using the DIRectory: Dolby Fax Applications..........................................5-13 5.4.1 Entering DIRectory Mode .......................................................5-13 5.4.2 Creating New Directory Entries ..............................................5-14 5.4.2.1 Using the COPY ENTRY? Feature.............................5-18 5.4.3 Using Directory Entries ...........................................................5-19 5.4.4 Editing Directory Entries............................
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SECTION 1 INTRODUCTION 1.1 Introduction The Dolby Model DP503 is a digital audio encoder supporting up to two channels of Dolby AC-2, Dolby Digital (AC-3), and MPEG Layer-II digital audio coding algorithms at data rates from 40 kbps to 448 kbps. Single channel, dual channel, and joint stereo configurations are selectively available, depending on the chosen data rate. A front panel menu and directory system provides convenient access to the desired operating modes and to recall frequently used en
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1-2 This manual includes installation procedures, descriptions of Model DP503 operation, installation details, and interface specifications. The complementary DP524 decoder unit features automatic algorithm detection to provide foolproof operation in conjunction with the DP503. The DP524 is provided with its own user manual. 1.2 Features x Dolby AC-2, Dolby Digital (AC-3), and MPEG Layer-II audio * coding algorithms from 40 kbps - 448 kbps * x Mono, dual-mono, or joint stereo modes * x Algorithm
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1-3 supported with this audio coding technique, and are summarized in the product brochure. 1.4 Available Algorithms, Data Rates and Sample Rates Please refer to the product brochure packed with the unit for the most current information.
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1-4 1.5 Regulatory Notices FCC 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 this instruction manual, may cause harmful interference to radio
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1-5 IEC NOTICES This unit complies with the EMC requirements of of EN55103-1 and EN 55103-2 when installed in an E2 environment in accordance with this manual. IMPORTANT SAFETY NOTICE This unit complies with the safety standard IEC65. To ensure safe operation and to guard against potential shock hazard or risk of fire, the following must be observed: GB o Ensure the voltage selector is set to the correct mains voltage for your supply. o Ensure fuses fitted are the correct rating and type as ma
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SECTION 2 APPLICATIONS The Dolby Model DP503 is suitable for a variety of point-to-point and point-to- multipoint digital transmission applications, including cable, telecommunications, and satellite or terrestrial microwave links. The very high audio quality and low, spectrum-efficient data rates of the Dolby AC-2 or Dolby Digital (AC-3) coding processes make them particularly appropriate for these applications. The inclusion of MPEG algorithms provides further flexibility and compatibility wit
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2-2 Decoder circuitry can be readily incorporated into set-top decoder hardware, or integrated directly into consumer receiver equipment. 2.3 Satellite / Terrestrial Radio Communications With suitable digital modulation equipment, the Model DP503 can be used for various satellite broadcast/distribution applications including subcarrier, band- edge, and SCPC schemes. It can also provide the basis for a spectrum-efficient terrestrial radio system (e.g., STL, backhaul, or inter-city relay), either
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SECTION 2A DOLBY FAX - AN OVERVIEW 2A.1 Introduction The Dolby Fax system allows high quality audio to be sent over ISDN telephone lines. With a complete encode/decode system, communication is full duplex; i.e. two high quality audio channels can be sent in both directions at the same time. Time code can also be sent down an audio channel. An additional auxiliary channel can be used for signaling and data at 1200 baud. Where bi-directional two-channel audio and synchronization is required, addi
