JJF 1165-2007

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Related Standard	Status	PDF
JJF 1165-2007	English	329	Add to Cart	3 days	Calibration Specification for SINAD Meters	JJF 1165-2007	Valid	JJF 1165-2007

JJF 1165-2007
Calibration Specification for SINAD Meters
People's Republic of China National Metrology Technical Specifications
Satisfied meter calibration specification
Posted 2007-02-28
2007-05-28 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Satisfied meter calibration specification
SINAD Meters
This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on February 28, 2007, and from
From May 28, 2007 into effect.
Focal point. the National Committee of the acoustic measurement technology
Drafted by. Institute of Measurement and Detection Guangzhou
Shenzhen Academy of Metrology and Quality Inspection
Guangzhou City, boiler and pressure vessel seized by prison
This specification by the responsible National Technical Committee acoustic measurement interpretation
The main drafters of this specification.
Jiang Hong (Guangzhou Institute of Measurement and Detection)
Lun Zhou Bin (Guangzhou Institute of Measurement and Detection)
Zhang Guoqing (Shenzhen Academy of Metrology and Quality Inspection)
Jiao Jian (Shenzhen Academy of Metrology and Quality Inspection)
Drafters participate.
Zhou Changhua (Guangzhou Institute of Measurement and Detection)
Mabo Group (Guangzhou City, boiler and pressure vessel seized by the supervisor)
Jia Li (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 is satisfied that (1)
4 Overview (1)
5 Metrological characteristics (1)
5.1 is satisfied indicating unit (1)
5.2 built-in reference signal modulation unit (2)
Calibration Condition 6 (2)
6.1 environmental conditions (2)
6.2 standards and other measuring equipment (2)
7 calibration items and calibration methods (2)
7.1 calibration items (2)
7.2 Calibration method (3)
8 calibration results expression (5)
9 Recalibration interval (5)
Appendix A calibration certificate contents (6)
Appendix B Calibration Certificate page format recommended (7)
Appendix C Evaluation of Uncertainty in Measurement Examples (8)
Satisfied meter calibration specification
1 Scope
This standard applies to the audio signal modulation frequency is 1kHz, is satisfied that the measurement range is 0dB ~ 20dB of satisfied table
Calibration.
2 Citations
This specification refers to the following technical documents.
GB/T 3102.7-1993 "acoustic volume and unit"
GB/T 3947-1996 "Acoustics terminology"
JJF 1001-1998 "common measurement terms and definitions"
JJF 1034-2005 "Acoustic measurement terminology and definitions"
JJF 1059-1999 "Evaluation and Expression of Uncertainty in Measurement"
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 the GB/T 3947-1996 "Acoustics terminology", JJF 1034-2005 "acoustic metrology noun
Terms and definitions "of terms and definitions, and is satisfied that SINAD is defined.
This specification uses the quantities and units GB/T 3102.7-1993 "acoustic quantities and units" in the regulations.
3.1 is satisfied (SINAD) signaltonoiseanddistortionratio
Common logarithm wireless communication device the received audio signal and the noise and harmonic signals and the ratio is multiplied by 20,
Decibels (dB).
SINAD = 20l (gS N DN) D (1)
Where. SINAD --- satisfied, dB;
S --- fundamental signal level, mV;
N --- noise signal level, mV;
D --- harmonic signal level, mV.
4 Overview
Is satisfied that the table is mainly used for audio signal receiving quality wireless communications products and evaluate receiver sensitivity test,
It is usually indicated by the built-in reference is satisfied with the composition modulation signal source, such units.
5 Metrological characteristics
5.1 is satisfied indicating unit
5.1.1 Input level range