ARINC 757A-1 : 2015

1.0 INTRODUCTION
1.1 Purpose of this Document
1.2 Basic Principles
1.3 Unit Description
1.4 Reliability
1.5 Maintainability
1.6 Interchangeability
1.7 Regulatory Approval
2.0 INTERCHANGEABILITY STANDARDS
2.1 General
2.2 Form Factors, Connectors and Index Pin Coding
2.3 Standard Interwiring
2.4 Primary Power Input
2.5 Environmental Specification
2.6 Software Design Guidance
2.7 Hardware Design Guidance
3.0 RECORDER DESIGN
3.1 General
3.2 Information Recovery
3.3 Aircraft Configuration Interface
3.4 Power Interruptions
3.5 Failure Warning and Functional Test
3.6 Recording Duration
3.7 Crash Protection
3.8 Time Correlation
3.9 Data Link Communications (Optional)
4.0 PROVISION FOR TEST
4.1 Built-In Test Equipment
4.2 Fault Reporting
4.3 Automatic Test Equipment
ATTACHMENTS
ATTACHMENT 1 - SYSTEM BLOCK DIAGRAM
ATTACHMENT 2 - CVR INTERWIRING DIAGRAM WITH INTERNAL
               MICROPHONE (AC POWER SHOWN)
ATTACHMENT 3 - CVR INTERWIRING DIAGRAM WITH REMOTE
               MICROPHONE (DC POWER SHOWN)
ATTACHMENT 4 - CVR CONNECTOR LAYOUT, TYPE 57 PIN
ATTACHMENT 5 - CVR STANDARD INTERWIRING PIN DESIGNATION
ATTACHMENT 6 - NOTES TO STANDARD INTERWIRING
ATTACHMENT 7 - AUDIO ERASE CIRCUIT DETAILS
ATTACHMENT 8 - CVR CONTROL UNIT CONNECTOR LAYOUT TYPE MS3112-20-41P
ATTACHMENT 9 - CVR CONTROL UNIT CONNECTOR LAYOUT,
               MINIATURE CONTROL UNIT, 37 POSITION SIMILAR TO MIL-C-24308
ATTACHMENT 10 - MICROPHONE AND CABLE
ATTACHMENT 11 - CVR CONTROL UNIT STANDARD INTERWIRING
                (41 AND 37) CONNECTOR
ATTACHMENT 12 - NOTES TO CONTROL UNIT STANDARD INTERWIRING
ATTACHMENT 13 - UTLINE AND DIMENSION
ATTACHMENT 14 - CVR MOUNTING TRAY WITH OPTIONAL ISOLATORS
ATTACHMENT 15 - OUTLINE AND DIMENSION, CONTROL UNIT
ATTACHMENT 16 - OUTLINE AND DIMENSION, ALTERNATE MINIATURE
                CONTROL UNIT
ATTACHMENT 17 - OUTLINE AND DIMENSION, STANDARD MICROPHONE
ATTACHMENT 18 - OUTLINE AND DIMENSION, ALTERNATE MINIATURE
                MICROPHONES
ATTACHMENT 19 - CVR STATUS/OMS COMMAND WORD FORMAT
ATTACHMENT 20 - FAULT AND STATUS OUTPUT CONDITIONS
APPENDIX A - MICROPHONE LOCATIONS
APPENDIX B - MICROPHONE SPACING
APPENDIX C - LIST OF REFERENCE DOCUMENTS
APPENDIX D - GUIDANCE MATERIAL FOR INSTALLATION OF
               COMBINED VOICE AND FLIGHT DATA RECORDERS
APPENDIX E - INTERNAL OR EXTERNAL RIPS IMPLEMENTATION
APPENDIX F - GUIDANCE MATERIAL FOR INSTALLATION OF DATA LINK
APPENDIX G - ACRONYMS AND ABBREVIATIONS

Gives design guidance for the development and installation of a new generation of Cockpit Voice Recorders (CVRs) which may utilize solid state memory and employ analog to digital conversions and related voice encoding techniques.