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GB/T 25454-2010: General specification for equalization equipment of electrophones musical instruments
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GB/T 25454-2010: General specification for equalization equipment of electrophones musical instruments

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General specification for equalization equipment of electrophones musical instruments ICS 97.200.20 Y58 National Standards of People's Republic of China Electric musical instruments ming balanced class audio devices General technical conditions Issued on. 2010-11-10 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 requires 2 Test Method 4 5 12 6 Inspection Rules 7 signs, packaging, transportation and storage 16

Foreword

The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee Instrument (SAC/TC371) centralized. This standard was drafted. Wuhan Eric card Electronics Co., Ltd., Beijing Institute of Musical Instruments. The main drafters. Zhang Jian Tong, Tu Shuzhen, solemn, Wu Dongliang, Li Jian, Zhang Zhenqi, Wang Wei. Electric musical instruments ming balanced class audio devices General technical conditions

1 Scope

This standard specifies the terms and definitions electric musical instruments ming balanced class audio devices, requirements, test methods, inspection rules and signs, packaging, transportation Transport and storage. This standard applies to electric musical instruments ming balanced class sound system (hereinafter referred to as the device).

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 191 Packaging - Pictorial signs (GB/T 191-2008, ISO 780.1997, MOD) GB/T 2828.1-2003 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch test sample Programme (ISO 2859-1.1999, IDT) GB/T 2829 periodic inspection Sampling procedures and tables (suitable for process stability test) GB/T 3240 acoustic measurement commonly used frequency GB/T 5465.2 Graphical symbols for electrical equipment - Part 2. Graphical symbols (GB/T 5465.2-2008, IEC 60417DB. 2007, IDT) GB 8898 Audio, video and similar electronic apparatus - Safety requirements (GB 8898-2001, eqv IEC 60065.1998) GB/T 9384-1997 broadcast radio, broadcast television receivers, tape recorders and audio amplifiers (amplifiers) environment Test requirements and test methods GB 13837 Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement (GB 13837- 2003, IEC /CISPR13.2001, MOD) GB 17625.1 Electromagnetic Compatibility Limits for harmonic current emissions (equipment input current ≤16A) (GB 17625.1- 2003, IEC 61000-3-2.2001, IDT) SJ/T 11363 electronic information products of toxic and hazardous substances in requirements SJ/T 11364-2006 Electronic Information Products Pollution Control Marking Requirements Detection SJ/T 11365 electronic information products of toxic and hazardous substances

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Gain frequency response gainfrequencyresponse A function of gain versus frequency of the device under test. 3.2 Total harmonic distortion plus noise totalharmonicdistortionandnoise The ratio of the output signal by the RMS RMS filtered fundamental component after their total output signal. ...