AS 2680-1984

1 - AS 2680-1984 ACOUSTICS - PERFORMANCE REQUIREMENTS FOR TAPE RECORDING EQUIPMENT FOR USE IN ACOUSTICAL MEASUREMENT SYSTEMS
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE.
5 - 1.2 APPLICATION.
5 - 1.3 REFERENCED DOCUMENTS.
5 - 1.4 CLASSIFICATION.
6 - SECTION 2. MINIMUM PERFORMANCE REQUIREMENTS FOR TYPE A AND TYPE B TAPE RECORDING EQUIPMENT
6 - 2.1 GENERAL.
6 - 2.2 PERFORMANCE REQUIREMENTS.
6 - 2.2.1 Mean deviation from rated speed.
6 - 2.2.2 Speed fluctuation (wow and flutter).
6 - 2.2.3 Overall frequency response.
6 - 2.2.4 Overall record/ reproduce response drift.
6 - 2.2.5 Maximum output level.
6 - 2.2.6 Overall unweighted signal- to- noise ratio.
6 - 2.2.7 Separation between tracks.
6 - 2.2.8 Signal/ erased signal ratio.
7 - 2.3 OTHER CHARACTERISTICS AND REQUIREMENTS.
7 - 2.3.1 Maximum start time to record/ reproduce speed.
7 - 2.3.2 Interconnections.
7 - 2.3.3 Automatic gain control and noise reduction circuitry
7 - 2.3.4 Level indicator.
7 - 2.3.5 Environmental conditions.
7 - 2.3.6 Equalization characteristics.
7 - 2.3.7 Battery level indication.
8 - APPENDIX A - STATEMENT OF TEST RESULTS TO CHECK COMPLIANCE OF TAPE RECORDING EQUIPMENT WITH THIS STANDARD

Specifies the minimum performance requirements for tape recording equipment used in the analysis of acoustical signals. It deals only with those aspects of design and operation of tape recording equipment. It highlights the fact that the function of circuitry for automatic gain control and noise reduction, e.g. Dolby system, is not compatible with the requirements of acoustical measurements.

This standard specifies certain minimum performance requirements of tape recording equipment, excluding FM recorders, for recording and reproducing analogue representations of acoustical signals in acoustical measure- ment systems.NOTES:1. Tape recorders complying with this standard may not necessarily be suitable for acoustical measurements where frequency analysis in bands of less than one-third octave may be required.2. Appendix A gives the test information required in checking compliance of tape recording equipment with this standard.