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              Users' Manual For Model DP503
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              TABLE OF CONTENTS
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SECTION 1 INTRODUCTION              
1.1 Introduction
              1.2 Features
1.3 Dolby AC-2 and Dolby Digital (AC-3)            
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              1.5 Regulatory Notices
FCC                
UL
UK                
1-5
              IEC NOTICES
GB                
F
D                
I
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SECTION 2 APPLICATIONS              
2.1 Telecommunications
Dolby Fax                
2.2 Cable
              2.3 Satellite / Terrestrial Radio Communications
SECTION 2A DOLBY FAX - AN OVERVIEW              
2A.1 Introduction
2A.2 Algorithms and Applications                
ISDN
              2A.3 Quick Start for Equipment Installation
              2A.4 Quick Start for ISDN Setup
2A.5 Quick Start for Developing a Phone Directory              
2A.6 Quick Start for Placing Dolby Fax Calls
2A.7 Receiving Dolby Fax Calls                
2A-5
              2A.8 Some Specific Applications
ISDN                
Location X
Location Y                
Stereo Playback
              Soundtrack Approval
              2A-7
ISDN                
Location X
Location Y                
Dubbing Sound to Picture
              Multi-track Recording
SECTION 3 PRE-INSTALLATION              
3.1 Unpacking
3.2 Inspection                
3.2.2 Claims for Shipping Damage
3.3 Fusing Information                
Main Fuse:
              Internal Fuse
              3.4 Configuring Jumper Settings
Removing the Top Cover                
3.4.1   Clock Termination Jumper J12 
3.4.2   Analog Audio Input Termination J13/J14                 
3.4.3   Signal Ground-to-Chassis Link J15 
              3.5 Configuring the Rear Panel DIP Switch S101
3-5              
3.5.1 Switch nos. 1-5 - Unit Address
Note                 
The address is set using conventional binary codes as follows:
              3.5.2 Switch no. 6 - Mode of Operation: Normal/Download
3.5.5 Switch nos. 7 & 8 - Baud Rate Set                
SECTION 4 INSTALLATION AND LEVEL CALIBRATION
              4.1 Mounting
4.2 Audio Connections                
4.2.1 S/PDIF Input
4.2.2 AES/EBU Input                
4.2.3 Analog Input
              4.3 Data / Status / Control Connections
4.3.1 Encoded Data Out and Timing                
4.3.2 Auxiliary Data
4.3.3 Terminal Adapter Control                
4.3.4 Remote Control
              4.4 Power
4.5 Level Calibration (Analog Inputs)                
Calibration Procedure
              4.6 Dolby Fax ConnectionsAdditional Procedures
4.6.1 Mounting                
4.6.2 Audio Connections
4.6.3 Encoded Data Out and Timing            
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              4.6.10 ISDN Connections
SECTION 5 OPERATION              
5.1 Introduction to the User Interface
5.1.1 Push-button Key Description            
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              5.1.2 Operational Modes
5.1.3 Operational Hierarchy              
5.2 Encoder Configuration
              5.2.1 To change Algorithm Type
5.2.2 To change Data Rate              
5.2.3 To change Channel Mode
5.2.4 To change Sample Rate              
5.2.5 To change Aux Rate (auxiliary data rate)
              5.3   ISDN Setup 
only                
)
5.3.1 Entering ISDN Setup Mode              
5.3.2 To choose Switch Type
5.3.3 To configure Line 1 (L1)              
ENABLE L1?   Y N
PRI NUM1: _              
PRI SPID1: _
SEC NUM1: _                
SEC SPID1: _
5.3.4 To configure Line 2 (L2), Line 3 (L3), Line 4 (L4)                
5.3.5 Concluding ISDN Setup
              UPDATE TA?   Y N
UPDATING TA...              
5.4 Using the DIRectory: Dolby Fax Applications
5.4.1 Entering DIRectory Mode              
5.4.2 Creating New Directory Entries
              NAME: _
PHONE: _              
EDIT CODEC?  Y N
              EDIT ISDN?   Y N
 BONDING-1 64                
STORE ENTRY? Y N
RE-EDIT?      Y N                
5.4.2.1 Using the COPY ENTRY? Feature
              INITIALIZING TA
YOUR ENTRY 1                
5.4.4 Editing Directory Entries
5.4.5 Deleting Directory Entries                
5.5 Using the DIRectory: Encoder-only Applications
              AC2 256 2C 48 12
              5.5.1 Entering DIRectory Mode
5.5.2 Creating New Directory Entries              
NAME: _
              EDIT CODEC?  Y N
STORE ENTRY? Y N                
RE-EDIT?      Y N
5.5.2.1 Using the COPY ENTRY? Feature              
5.5.3 Using Directory Entries
5.5.4 Editing Directory Entries                
5.5.5 Deleting Directory Entries
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APPENDIX A INTERFACE SPECIFICATIONS AND DESCRIPTIONS              
A.1 DP503 Connector Pinouts
A.1.1 Analog Audio Input, J101 & J102                
A.1.2 AES/EBU Digital Audio Input, J103
A.1.3 S/PDIF Digital Audio Input, J104                
A-2
              A.1.4 Encoded Data Out and Timing, J105
DB-37 male connector.                
A.1.5 Aux/Acc RS-232 Port, J106
DB-9 female connector.                
A-3
              A.1.6 TA Ctrl  RS-232 Port, J107
DB-9 male connector.                
A.1.7 Rem/Download RS-232 Port, J108
DB-9 female connector.                
A.1.8 Status, J109
              A.2 RS-449 Interface Description
A.2.1 Functional Description                
A.2.2 Interface Timing
              A.2.3 Back-to-Back Testing
A.2.4 Dolby Fax Cable Pinout, Part No. 83293            
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APPENDIX B SOFTWARE DOWNLOADING PROCEDURE                
B.1 Introduction
B.2 Software Downloading Procedure              
DP503 INIT XX.X
READY TO LOAD...                
SERLOAD COM# BAUD FILENAME
              UPDATE COMPLETE
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APPENDIX C DP503 USER INTERFACE STRUCTURE              
C.1 Setup Menu Operation
C-2              
C.2 Directory Menu Operation - USE
C-3              
C.3 Directory Menu Operation - EDIT
C-4              
C.4 Directory Menu Operation - NEW
C-5              
C.5 Directory Menu Operation - DEL
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APPENDIX D ISDN ORDERING GUIDE (NORTH AMERICA)              
D.1 Introduction
D.2 Ordering ISDN Service              
D.2.1 Switch Types
              D.2.2 B Channels
              D.3 Regional Bell Operating Companies ISDN Hotlines
              APPENDIX E GLOSSARY OF ISDN TERMS