JJF 1200-2008

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JJF 1200-2008	English	559	Add to Cart	5 days	Calibration specification for audio-frequency power amplifiers	JJF 1200-2008	Valid	JJF 1200-2008

JJF 1200-2008
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