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JJF 1200-2008 English PDF

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JJF 1200-2008: Calibration specification for audio-frequency power amplifiers
Status: Valid
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JJF 1200-2008English559 Add to Cart 5 days [Need to translate] Calibration specification for audio-frequency power amplifiers Valid JJF 1200-2008

PDF similar to JJF 1200-2008


Standard similar to JJF 1200-2008

GB/T 3222.2   GB/T 3222.1   JJG 188   JJG 1200   JJG 1190   JJF 1191   

Basic data

Standard ID JJF 1200-2008 (JJF1200-2008)
Description (Translated English) Calibration specification for audio-frequency power amplifiers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 24,245
Date of Issue 2008-04-16
Date of Implementation 2008-07-16
Quoted Standard JJF 1034-2005; JJF 1059-1999; JJF 1157-2006; JJG 449-2001; JJG 607-2003; GB 3102.7-1993; GB/T 9001-1988; IEC 60268-2-1987; IEC 60268-3-2000
Regulation (derived from) AQSIQ Announcement No. 45 of 2008
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to acoustic measurements with Audio Power Amplifier (hereinafter referred to as PA) calibration.

JJF 1200-2008: Calibration specification for audio-frequency power amplifiers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration specification for audio-frequency power amplifiers People's Republic of China National Metrology Technical Specifications Audio amplifier calibration specification Posted 2008-04-16 2008-07-16 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Audio amplifier calibration specification lifiers This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on April 16, 2008, and from From July 16, 2008 into effect. Focal point. the National Committee of the acoustic measurement technology Drafting. Shenzhen Academy of Metrology and Quality Inspection Shanghai Measurement and Testing Technology Research Institute China Institute of Metrology This specification metering commissioned National Technical Committee is responsible for interpreting acoustics Drafters of this specification. Li Xiang (Shenzhen Academy of Metrology and Quality Inspection) Zhang Guoqing (Shenzhen Academy of Metrology and Quality Inspection) At the King chul (Shenzhen Academy of Metrology and Quality Inspection) Jiao Jian (Shenzhen Academy of Metrology and Quality Inspection) Gu Jianxiu (Shanghai Institute of Measurement and Testing) Zhangmei E (China Institute of Metrology) Jia Li (Shenzhen Academy of Metrology and Quality Inspection) Li Yang Wu (Shenzhen Academy of Metrology and Quality Inspection) Duan Xu (Shenzhen Academy of Metrology and Quality Inspection)

table of Contents

1 Scope (1) 2. Referenced Documents (1) 3 terminology and units of measurement (1) 3.1 sound system (1) 3.2 Rating (1) 3.3 rated conditions (1) Rating 3.4 Characteristics (2) 3.5 source electromotive force (2) 3.6 normal operating conditions (2) 3.7 Noise [output] voltage (2) 3.8 residual noise output voltage (2) 3.9 crosstalk attenuation (2) 3.10 degree of separation (3) 4 Metrological characteristics (3) 4.1 frequency response and effective frequency range (3) 4.2 Distortion limited output voltage and power (3) 4.3 Total Harmonic Distortion (3) The maximum gain is 4.4 (3) 4.5 Gain Control (3) 4.6 noise output voltage (3) 4.7 residual noise output voltage (3) 4.8 gain difference (3) 4.9 crosstalk attenuation (3) 4.10 resolution (4) Calibration Condition 5 (4) Environmental conditions 5.1 (4) 5.2 standards and other measuring equipment (4) 6 calibration items and calibration methods (4) 6.1 Calibration item (4) 6.2 Calibration method (5) 7 Calibration result expression (9) 7.1 Calibration Data Processing (9) 7.2 calibration certificate (9) 7.3 calibration measurement uncertainty (9) 8 Recalibration interval (9) Appendix A calibration certificate (10) Appendix B audio amplifier calibration Uncertainty Evaluation Examples (13) Audio amplifier calibration specification

1 Scope

This instruction applies to acoustic measurements of audio power amplifier (hereinafter referred to as amplifier) calibration.

2 Citations

This specification references the following documents JJF 1034-2005 "Acoustic measurement terminology and definitions" JJF 1059-1999 "Measurement Uncertainty and indicates" JJF 1157-2006 "measuring amplifier" JJG449-2001 "octave and 1/3 octave filters" JJG607-2003 "audio signal generator" GB 3102.7-1993 "Quantities and units of acoustics" GB/T 9001-1988 "audio amplifier measurement methods" IEC 60268-2. 1987Soundsystemequipmentpart2. Explanationofgeneralterms andcalculationmethods (Sound system equipment - Part 2. General terms interpretation and calculation methods) IEC 60268-3.2000Soundsystemequipmentpart3. Amplifiers (sound system equipment - Part 3 Part. Amplifiers) When using this specification it should be noted that using the currently valid version of the documents cited.

3 terminology and units of measurement

This specification uses JJF 1034-2005 the relevant terminology and definitions in the regulation and GB 3102.7-1993 Given the volume and units. According to the specification required, referring to GB/T 9001 and IEC 60268-2 gives the following terms and definitions. 3.1 sound system soundsystem Capable of processing equipment combination transmission acoustic signal or signals, such as transducers, amplifiers, recorders and other combinations. 3.2 rating ratedvalues By the value specified by the manufacturer. Whether "nominal conditions", "characteristics rating" and other terms are different techniques that Kind of meaning. 3.3 rated conditions ratedconditions When using or testing a device, the device must be operated under the conditions specified by the manufacturer, these conditions include electricity Gas, mechanical and climatic conditions. By its very nature, these conditions are not determined by measurement. NOTE. In the present specification, the following conditions must be regarded as the power amplifier at rated conditions. a) amplifier connected to the rated power. b) the rated source emf source impedance connected in series, and then connected to the input. c) the output of the rated load impedance.

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