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Frequency Standard Unit

Frequency Standard Unit, Total:500 items.

In the international standard classification, Frequency Standard Unit involves: Construction of airports, Electrical engineering in general, Colour coding, Equipment for entertainment, Audio, video and audiovisual engineering, On-board equipment and instruments, Aerospace electric equipment and systems, Piezoelectric and dielectric devices, Acoustics and acoustic measurements, Medical sciences and health care facilities in general, Quality, Test conditions and procedures in general, Integrated circuits. Microelectronics, Vocabularies, Construction materials, Road engineering, Services, Quantities and units, Character symbols, External water conveyance systems, Installations in buildings, Sociology. Demography, Protection against fire, Magnetic materials, Radiocommunications, Electricity. Magnetism. Electrical and magnetic measurements, Telecommunications in general, Construction industry, Radiation measurements, Earthworks. Excavations. Foundation construction. Underground works, Furniture, Packaging and distribution of goods in general, Television and radio broadcasting, Telecontrol. Telemetering, Rotating machinery, Safety of machinery, Structures of buildings, Metrology and measurement in general, Fasteners, Leisure. Tourism, Nuclear energy engineering, Labour. Employment, Pipeline components and pipelines, Non-ferrous metals, Products of the textile industry, Testing of metals, Resistors, Leather technology, Measurement of volume, mass, density, viscosity, Lubricants, industrial oils and related products, Energy and heat transfer engineering in general, Mining and quarrying, Occupational safety. Industrial hygiene, Measurement of time, velocity, acceleration, angular velocity, Electromagnetic compatibility (EMC), Shipbuilding and marine structures in general, Analytical chemistry, Home textiles. Linen, Textile fibres, Information technology (IT) in general, Products of the chemical industry, Company organization and management, Standardization. General rules, Adhesives, Wastes, Mechanical testing, Accident and disaster control, Small craft, Surface treatment and coating, Terminology (principles and coordination), Insulating materials, Cases. Boxes. Crates, Non-textile floor coverings, Water quality, Farming and forestry, Geology. Meteorology. Hydrology, Aids for disabled or handicapped persons, Electrical wires and cables, Fibre optic communications.

Indonesia Standards, Frequency Standard Unit

SNI 03-7048-2004 The placement criteria of very high frequency air-ground communication facilities (VHF-A/G)
SNI 04-1922-2002 Standard Frequency

Korean Agency for Technology and Standards (KATS), Frequency Standard Unit

KS C IEC 60196:2004 Standard frequencies
KS C IEC 60196:2014 Standard frequencies
KS C IEC 60196:2016 Standard frequencies
KS C IEC 60196-2016(2021) Standard frequencies
KS A 0301-1998 FREQUENCY STANDARD FOR MUSICAL INSTRUMENTS
KS A 0301-1986 FREQUENCY STANDARD FOR MUSICAL INSTRUMENTS
KS I ISO 16:2003 Acoustics-Standard tuning frequency(standard musical pitch)
KS I ISO 16:2014 Acoustics — Standard tuning frequency (standard musical pitch)
KS I ISO 16-2014(2019) Acoustics — Standard tuning frequency (standard musical pitch)
KS R 6020-1996 Acoustics-Specification of test tracks for the purpose of measuring noise emitted by road vehicles
KS C 5393-42-2013 Potentiometers for use in electronic equipment－Part 4：Blank detail specification：Single-turn rotary power potentiometers Assessment level F
KS F 2462-2016 Standard test method for unit weight of structural light weight concrete

TR-TSE, Frequency Standard Unit

TS 1830-1975 STANDARD FREQUENCIES
TS 2493-1976 ACOUSTICS — STANDARD TUNING FRECJUENCY (STANDARD MUSICAL PITCH)

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Frequency Standard Unit

GB/T 1980-1996 Standard frequencies
GB/T 1980-2005 Standard frequencies
GB 3451-1982 Standard Tuning Frequency
GB/T 3451-1982 Standard tuning frequency
GB/T 12499-1990 Measuring methods for rubidium frequency standards
GB/T 12498-2012 Generic specification of rubidium frequency standard
GB/T 12498-1990 Generic specification of rubidium frequency standards
GB 12498-1990 Rubidium Atomic Frequency Standard General Specifications
GB/T 16700-1996 Standard frequencies for centralized network control installations
GB/T 7402-1987 Time and frequency dissemination via television signals
GB/T 13701-1992 Isotopic analysis of uranium by single-standard gas mass-spectrometer method
GB/T 50597-2010 Standard for terminology,measure units and symbols in textile engineering
GB/T 50597-2019 Textile Engineering Common Terms, Units of Measurement and Symbol Standards

RU-GOST R, Frequency Standard Unit

GOST 28596-1990 Standard frequencies
GOST R 8.930-2016 State system for ensuring the uniformity of measurements. Transfer units of time, frequency and time scale national UTC (SU) from the State primary standard. The Russian Federation with the use of the GLONASS system. Fundamentals
GOST 8.515-1984 State system of ensuring the uniformity of measurements. Standard frequency and time signals radiated by specialized radio stations of the State service of time, frequency and the Earth rotation parameters determination. Time code

KR-KS, Frequency Standard Unit

KS C IEC 60196-2016 Standard frequencies

Association Francaise de Normalisation, Frequency Standard Unit

NF C00-231*NF EN 60196:2009 IEC standard frequencies
NF C91-131*NF EN 50554:2021 Basic standard for the in-situ assessment of exposure to radio frequency electromagnetic fields in the vicinity of a broadcast site
FD X02-051:1995 Fundamental standards. Units of measurement. Conversion factors.
NF Z84-098*NF EN 303098:2019 Maritime low power personal locating devices employing AIS - Harmonised Standard for access to radio spectrum (V2.2.1)
NF X02-207:1985 Fundamental standards. Quantities, units and symbols of acoustics.
NF C99-131*NF EN 50554:2011 Basic standard for the in-situ assessment of a broadcast site related to general public exposure to radio frequency electromagnetic fields
FD X02-003:2013 Fundamental standards - Writing rules for numbers, quantities, units and symbols
NF X02-003:1995 Fundamental standards. Writing rules for numbers, quantities, units and symbols.

International Electrotechnical Commission (IEC), Frequency Standard Unit

IEC 60196:1965 I E C standard frequencies
IEC 60196:2009 IEC standard frequencies
IEC 60242:1967 Standard frequencies for centralized network control installations
IEC 60164:1964 Recommendations in the field of quantities and units used in electricity
IEC 61937-1:2007/AMD1:2011 Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 1: General

U.S. Air Force, Frequency Standard Unit

AIR FORCE A-A-58034 VALID NOTICE 1-2012 Frequency Standard, Cesium

European Committee for Electrotechnical Standardization（CENELEC）, Frequency Standard Unit

EN 60196:2009 IEC standard frequencies

AENOR, Frequency Standard Unit

UNE-EN 60196:2010 IEC standard frequencies
UNE-EN ISO 266:1998 ACOUSTICS. PREFERRED FREQUENCIES. (ISO 266:1997).

Danish Standards Foundation, Frequency Standard Unit

DS/EN 60196:2009 IEC standard frequencies
DS/EN 50554:2021 Basic standard for the in-situ assessment of exposure to radio frequency electromagnetic fields in the vicinity of a broadcast site
DS/ETS 300152:1993 Radio Equipment and Systems. Maritime Emergency Position Indicating Radio Beacons (EPIRBs) intended for use on the frequency 1215 MHz or the frequencies 1215 MHz and 243 MHz for homing purposes only. Technical characteristics and methods of measurements
DS/EN 62129-2:2011 Calibration of wavelength/optical frequency measurement instruments - Part 2: Michelson interferometer single wavelength meters

British Standards Institution (BSI), Frequency Standard Unit

BS EN 60196:2009 IEC standard frequencies
BS 6884:1987 Recommendations for plan dimensions of unit loads

National Metrological Verification Regulations of the People's Republic of China, Frequency Standard Unit

JJG 1004-2005 Hydrogen Atomic Frequency Standards
JJG 181-2005 Quartz Crystal Frequency Standards
JJG(航天) 29-1987 Verification rules for short-term frequency stability of high-stability standard frequency source
JJG 292-1996 Verification Regulation of Rubidium Gas Cell Frequency Standards
JJG 492-2009 Verification Regulation of Cesium Atomic Frequency Standards
JJG 292-2009 Verification Regulation of Rubidium Atomic Frequency Standards
JJG 48-2004 Standard Slice of Single Crystal Silicon Resistivity
JJG 492-1987 Verification Regulation of Cesium Beam Frequency Standard
JJG 48-1990 Verification Regulation of Standard Slice of Single Crystal Silicon Resistivity
JJG(航天) 19-1985 311 type phase angle standard verification low frequency phase meter verification regulations
JJG(航天) 20-1985 312 type phase angle standard verification low frequency phase meter verification regulations
JJG 534-1988 Verification Regulation of Model“1107-1～1107-5”Series Waveguide RF Power Transfer Standard

Japanese Industrial Standards Committee (JISC), Frequency Standard Unit

JIS Z 8702:1994 Frequency standard for musical instruments
JIS Z 8071:2003 Guidelines for standards developers to address the needs of older persons and persons with disabilities

Defense Logistics Agency, Frequency Standard Unit

DLA DSCC-VID-V62/11607 REV B-2011 MICROCIRCUIT, DIGITAL, PHASE DETECTOR/FREQUENCY SYNTHESIZER, MONOLITHIC SILICON
DLA SMD-5962-90987-1992 MICROCIRCUIT, LINEAR, FREQUENCY CONTROLLER, PHASE LOCKED, MONOLITHIC SILICON
DLA SMD-5962-94641-1994 MICROCIRCUIT, LINEAR, 4-BIT DATA BUS INPUT PLL FREQUENCY SYNTHESIZER, MONOLITHIC SILICON

Society of Automotive Engineers (SAE), Frequency Standard Unit

SAE AS6254-2012 Minimum Performance Standard for Low Frequency Underwater Locating Devices (Acoustic) (Self-Powered)
SAE ARINC677-2015 INSTALLATION STANDARDS FOR LOW FREQUENCY UNDERWATER LOCATOR BEACON (LF-ULB)
SAE AIR36105-2011 Air Cargo Unit Load Devices - Reference Standards

United States Navy, Frequency Standard Unit

NAVY MIL-F-28811 A NOTICE 1-1995 FREQUENCY STANDARD, CESIUM BEAM TUBE
NAVY MIL-F-28811 A-1985 FREQUENCY STANDARD, CESIUM BEAM TUBE
NAVY MIL-STD-1660 VALID NOTICE 2-1991 DESIGN CRITERIA FOR AMMUNITION UNIT LOADS
NAVY MIL-STD-1660 NOTICE 1-1978 DESIGN CRITERIA FOR AMMUNITION UNIT LOADS
NAVY MIL-T-28816-1975 TIME-FREQUENCY STANDARD, DISCIPLINED, AN/URQ-23, GENERAL SPECIFICATION FOR
NAVY MIL-T-28816 NOTICE 1-1998 TIME-FREQUENCY STANDARD, DISCIPLINED, AN/URQ-23, GENERAL SPECIFICATION FOR
NAVY MIL-T-28816 (1)-1975 TIME-FREQUENCY STANDARD, DISCIPLINED, AN/URQ-23, GENERAL SPECIFICATION FOR
NAVY MIL-STD-1322-728-1969 PALLETIZING DOMESTIC UNIT LOAD STANDARD MR AUTOPILOT BATTERY UNIT (IN CONTAINER MK 460 MOD 2)
NAVY MIL-STD-1322-729-1969 PALLETIZING DOMESTIC UNIT LOAD STANDARD ER AUTOPILOT BATTERY UNIT (IN CONTAINER MK 460 MOD 3)
NAVY MIL-STD-1322-731-1969 PALLETIZING DOMESTIC UNIT LOAD STANDARD MR OR ER GUIDANCE SECTION (IN CONTAINER MK 461 MOD 0)

Lithuanian Standards Office , Frequency Standard Unit

LST EN 60196-2009 IEC standard frequencies (IEC 60196:2009)
LST EN 50554-2021 Basic standard for the in-situ assessment of exposure to radio frequency electromagnetic fields in the vicinity of a broadcast site
LST EN 300 152 V1.2.1-2000 Electromagnetic compatibility and Radio spectrum Matters (ERM). Maritime Emergency Position Indicating Radio Beacons (EPIRBs) intended for use on the frequency 121,5 MHz or the frequencies 121,5 MHz and 243 MHz for homing purposes only. Technical characte

International Organization for Standardization (ISO), Frequency Standard Unit

ISO 16:1975 Acoustics; Standard tuning frequency (Standard musical pitch)
ISO 10893-10:2011/Amd 1:2020 Non-destructive testing of steel tubes — Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or
ISO 10893-11:2011/Amd 1:2020 Non-destructive testing of steel tubes — Part 11: Automated ultrasonic testing of the weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections — Amendment 1: C

BE-NBN, Frequency Standard Unit

NBN-ISO 16:1992 Acoustics. Standard tuning frequency (Standard musical pitch)
NBN 576.04-1961
NBN 46-1967 Standard voltages, Standard current ratings and Standard frequencies
NBN 576-04-1961
NBN C 10-001-1990

Group Standards of the People's Republic of China, Frequency Standard Unit

T/NAHIEM 33-2021 Standard of non-mosquito unit establishment
T/GSLCA 091号-2019 Unit canteen (group meals) management standards
T/CECS 1087-2022 Exploration Standard of Frequency Domain Seismic Wave Method
T/DDDT 004-2017 Safety standardization guidelines for elevator users
T/SDUWA 3001-2021 Water-saving enterprise (unit) evaluation standard
T/AASE Z001-2021 Safety standardization specification of special equipment's user
T/SGCX 007-2023 Shaoguan City Green Catering Unit Creation Standards
T/CWEC 19-2020 Evaluation code of practice for safety and health standardization management of hydrological monitoring agency
T/SIA 035-2022 Evaluation Standard for Competency of Digital Management Professional
T/ZEETAST 002-2019 Research practice standardizes evaluation criteria for operating units (camps)
T/SDUWA 5001-2022 "Urban Sewage Treatment Unit Laboratory Grade Evaluation Standards"
T/HNJC 002-2020 Establishment of Standards for assured consumption demonstration units in Hospitality &. Social Catering industry
T/GRM 005-2020 Evaluation Standard of service ability of Green Mine Consulting Service Unit
T/SWSA 003-2020 Standardization of work safety in technology application oriented scientific research institutions
T/CWEC 20-2020 Evaluation regulation of production safety standardization in water conservancy logistics support unit

Sichuan Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB5104/T 20-2020 Unit canteen management standards
DB51/T 2530-2018 Technical training standards for common equipment for full-time firefighters in enterprises and institutions

Institute of Electrical and Electronics Engineers (IEEE), Frequency Standard Unit

IEEE 260-1978 IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
P260.1/D19, February 2023 IEEE Draft Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
IEEE P260.1/D20, May 2023 IEEE Draft Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
IEEE P260.1/D18, August 2022 IEEE Draft Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
IEEE P260.1 IEEE Draft Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
IEEE P260.1/D19, February 2023 IEEE Draft Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
ANSI/IEEE Std 260.1-1993 American National Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
IEEE Std 260.1-2004 IEEE Standard Letter Symbols for Units of Measurement (SI Customary Inch-Pound Units, and Certain Other Units)
IEEE 268-1992 American national standard for metric practice
ANSI/IEEE Std 1196-1987 IEEE Standard for a Simple 32-Bit Backplane Bus: NuBus
IEEE P1193/D31, May 2022 IEEE Draft Guide for Measurement of Environmental Sensitivities of Frequency Standards
IEEE P1193/D33, October 2022 IEEE Draft Guide for Measurement of Environmental Sensitivities of Frequency Standards
IEEE P1193/D32, September 2022 IEEE Draft Guide for Measurement of Environmental Sensitivities of Frequency Standards
IEEE P1193 IEEE Approved Draft Guide for Measurement of Environmental Sensitivities of Frequency Standards
IEEE P1193/D34, October 2022 IEEE Approved Draft Guide for Measurement of Environmental Sensitivities of Frequency Standards
SMPTE ST 299-1:2009 ST 299-1:2009 - SMPTE Standard - 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface
ST 299-1:2009 ST 299-1:2009 - SMPTE Standard - 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface
IEEE/ASTM SI 10-2002 Use of the International System of Units (SI): The Modern Metric System
IEEE Std P270/D10d, Sep 2005 IEEE Draft Standard Definitions for Selected Quantities, Units, and Related Terms, With Special Attention to the International System (SI) of Units
IEEE Std 1193-2003 IEEE Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators
IEEE Std 1193-1994 IEEE Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators
IEEE 1193-2003 Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators
IEEE Std 1139-1988 IEEE Standard Definitions of Physical Quantities for Fundamental Frequency and Time Metrology
IEEE No 127 IEEE Standard for Aerospace Equipment Voltage and Frequency Ratings
IEEE PSI 10/D2, October 2010 IEEE Draft Standard for Use of the International System of Units (SI): The Modern Metric System
IEEE PSI-10/D1, May 2010 IEEE Draft Standard for Use of the International System of Units (SI): The Modern Metric System
IEEE 208-1960 IEEE Standards on Video Techniques: Measurement of Resolution of Camera Systems, 1961
ANSI/IEEE Std 208-1960 IEEE Standards on Video Techniques: Measurement of Resolution of Camera Systems, 1961
IEEE Std 86-1975 IEEE Standard Definitions of Basic Per Unit Quantities for Alternating- Current Rotating Machines
IEEE Std 208-1995 IEEE Standard on video techniques:Measurement of resolution of camera systems,1993 techniques

International Telecommunication Union (ITU), Frequency Standard Unit

ITU-R TF.768-6-2003 Standard frequencies and time signals
ITU-R TF.768-7-2011 Standard frequencies and time signals
ITU-R TF.768-7 FRENCH-2011 Standard frequencies and time signals
ITU-R TF.768-7 SPANISH-2011 Standard frequencies and time signals
ITU-R TF.768-6 FRENCH-2003 Standard frequencies and time signals Fr閝uences 閠alon et signaux horaires
ITU-R TF.768-6 SPANISH-2003 Standard frequencies and time signals Frecuencias patr髇 y se馻les horarias
ITU-R RESOLUCION 28-1 SPANISH-2000 Standard-frequency and time-signal emissions
ITU-R TF.460-6-2002 Standard-frequency and time-signal emissions
ITU-R TF.SERIES SUPP 1-1998 Time Signals and Frequency Standards Emissions
ITU-R VOL 2000 TF SERIES-2000 Time Signals and Frequency Standards Emissions
ITU-R RESOLUTION 28-1-2000 Standard-frequency and time-signal emissions
ITU-R TF.460-6 FRENCH-2002 Standard-frequency and time-signal emissions
ITU-R TF.460-6 SPANISH-2002 Standard-frequency and time-signal emissions
ITU-R RESOLUTION 28-1 ARABIC-2000 Standard-frequency and time-signal emissions
ITU-R RESOLUTION 28-1 CHINESE-2000 Standard-frequency and time-signal emissions
ITU-R RESOLUTION 28-1 FRENCH-2000 Standard-frequency and time-signal emissions
ITU-R QUESTION 152-2/7-1997 Standard frequencies and time signals from satellites
ITU-R TF.485-2-1990 (WITHDRAWN) Use of Time Scales in the Field of Standard-Frequency and Time Services - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
ITU-R TF.2487-0,ITU-R TF.2487-2021 Protection criteria for systems in the standard frequency and time signal services
ITU-R TF.1552-2002 Time scales for use by standard-frequency and time-signal services
ITU-R TF.376-1-1966 (WITHDRAWN) Avoidance of External Interference with Emissions of the Standard-Frequency Service in the Bands Allocated to That Service - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
ITU-T R.35-1989 Standardization of FMVFT Systems for a Modulation Rate of 50 Bauds - Telegraph Transmission (Study Group IX) 7 pp
ITU-T R.37-1989 Standardization of FMVFT Systems for a Modulation Rate of 100 Bauds - Telegraph Transmission (Study Group IX) 4 pp
ITU-R QUESTION 152-27-1997 Standard frequencies and time signals from satellites
ITU-T R.35-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 50 BAUDS
ITU-T R.35 BIS-1988 50-BAUD WIDEBAND VFT SYSTEMS
ITU-T R.37-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 100 BAUDS
ITU-R TF.486-2-1998 Use of UTYC Frequency as Reference in Standard Requency and Time Signals Emissions
ITU-R M.1044-2003 Frequency sharing criteria in the amateur and amateur-satellite services
ITU-R TF.486-2 FRENCH-1998 USE OF UTC FREQUENCY AS REFERENCE IN STANDARD FREQUENCY AND TIME SIGNALS EMISSIONS
ITU-R TF.486-2 SPANISH-1998 USE OF UTC FREQUENCY AS REFERENCE IN STANDARD FREQUENCY AND TIME SIGNALS EMISSIONS
ITU-R QUESTION 244/7-2006 Interference between standard frequency and time signal services operating between 20 and 90 kHz
ITU-R QUESTION 2457-2006 Interference to the standard frequency and time signal service in the low-frequency band caused by noise from electrical sources
ITU-T F.10 FRENCH-1993 CHARACTER ERROR RATE OBJECTIVE FOR TELEGRAPH COMMUNICATION USING 5 - UNIT START-STOP EQUIPMENT
ITU-T F.10 SPANISH-1993 CHARACTER ERROR RATE OBJECTIVE FOR TELEGRAPH COMMUNICATION USING 5 - UNIT START-STOP EQUIPMENT
ITU-R M.1044-2-2003 Frequency sharing criteria in the amateur and amateur-satellite services Question ITU-R 48/8
ITU-T R.35 FRENCH-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 50 BAUDS
ITU-T R.35 SPANISH-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 50 BAUDS
ITU-T R.37 FRENCH-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 100 BAUDS
ITU-T R.37 SPANISH-1988 STANDARDIZATION OF FMVFT SYSTEMS FOR A MODULATION RATE OF 100 BAUDS
ITU-R TF.1552 SPANISH-2002 Time scales for use by standard-frequency and time-signal services Escalas de tiempo a utilizar por los servicios de frecuencias patr髇 y se馻les horarias
ITU-R F.454-1-1978 Pilot Carrier Level for HF Single-Sideband and Independent-Sideband Reduced-Carrier Systems - Section 3Aa - Technical Characteristics
ITU-R QUESTION 245/7-2006 Interference to the standard frequency and time signal service in the low-frequency band caused by noise from electrical sources
ITU-R M.1796-2-2014 Characteristics of and protection criteria for terrestrial radars operating in the radiodetermination service in the frequency band 8 500-10 680 MHz
ITU-T R.31-1989 Standardization of AMVFT Systems for a Modulation Rate of 50 Bauds - Telegraph Transmission (Study Group IX) 4 pp
ITU-R TF.457-2 FRENCH-1997 USE OF THE MODIFIED JULIAN DATE BY THE STANDARD-FREQUENCY AND TIME-SIGNAL SERVICES
ITU-T R.44-1989 6-Unit Synchronous Time-Division 2-3-Channel Multiplex Telegraph System for Use over FMVFT Channels Spaced at 120 Hz for Connection to Standardized Teleprinter Networks - Telegraph Transmission (Study Group IX) 6 pp
ITU-T R.44-1988 6-UNIT SYNCHRONOUS TIME-DIVISION 2-3-CHANNEL MULTIPLEX TELEGRAPH SYSTEM FOR USE OVER FMVFT CHANNELS SPACED AT 120 Hz FOR CONNECTION TO STANDARDIZED TELEPRINTER NETWORKS
ITU-R M.690-3-2015 Technical characteristics of emergency position-indicating radio beacons operating on the carrier frequencies of 121.5 MHz and 243 MHz
ITU-R M.1730-2009 Characteristics of and protection criteria for the radiolocation service in the frequency band 15.4-17.3 GHz
ITU-T R.31-1988 STANDARDIZATION OF AMVFT SYSTEMS FOR A MODULATION RATE OF 50 BAUDS
ITU-R F.454-1 FRENCH-1978 Pilot Carrier Level for HF Single-Sideband and Independent-Sideband Reduced-Carrier Systems - Section 3Aa - Technical Characteristics
ITU-R F.454-1 SPANISH-1978 PILOT CARRIER LEVEL FOR HF SINGLE-SIDEBAND AND INDEPENDENT-SIDEBAND REDUCED-CARRIER SYSTEMS
ITU-R F.1334-1997 Protection Criteria for Systems in the Fixed Service Sharing the Same Frequency Bands in the 1 to 3 GHz Range with the Land Mobile Service
ITU-R M.1730-1 FRENCH-2009 Characteristics of and protection criteria for the radiolocation service in the frequency band 15.4-17.3 GHz
ITU-R M.1730-1 SPANISH-2009 Characteristics of and protection criteria for the radiolocation service in the frequency band 15.4-17.3 GHz

AT-ON, Frequency Standard Unit

ONORM S 5002-1973 Standard frequencies for acoustical measuremcnts

ITU-R - International Telecommunication Union/ITU Radiocommunication Sector, Frequency Standard Unit

ITU-R TF.768-1-1994 Standard Frequencies and Time Signals
ITU-R TF.768-1992 Standard Frequencies and Time Signals
ITU-R TF.768-2-1995 Standard Frequencies and Time Signals
ITU-R TF.768-4-2001 Standard Frequencies and Time Signals
ITU-R TF.768-3-1997 Standard Frequencies and Time Signals
ITU-R TF.768-5-2002 Standard frequencies and time signals
ITU-R TF.374-3-1974 Standard-Frequency and Time-Signal Emissions - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
ITU-R TF.460-4-1986 Standard-Frequency and Time-Signal Emissions - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
RÉSOLUTION 28-1 FRENCH-2000 Standard-frequency and time-signal emissions
VOL 2000 TF SERIES-2000 Time Signals and Frequency Standards Emissions
RESOLUTION 28-1-2000 Standard-frequency and time-signal emissions
ITU-R TF.374-4-1998 Standard-Frequency and Time-Signal Emissions
ITU-R TF.460-5-1997 Standard-Frequency and Time-Signal Emissions
QUESTION 152-2/7-1997 Standard frequencies and time signals from satellites
ITU-R M.1462-1-2019 Characteristics of and protection criteria for radars operating in the radiolocation service in the frequency range 420-450 MHz
ITU-R TF.457-1-1974 Use of the Modified Julian Date by the Standard-Frequency and Time-Signal Services - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
QUESTION 245/7-2006 Interference to the standard frequency and time signal service in the low-frequency band caused by noise from electrical sources
ITU-R M.1044-1994 Frequency Sharing Criteria in the Amateur and Amateur-Satellite Services
ITU-R M.1044-1-1998 Frequency Sharing Criteria in the Amateur and Amateur-Satellite Services
ITU-R TF.536-1978 Time-Scale Notations - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
ITU-R TF.486-1-1978 Reference of Precisely Controlled Frequency Generators and Emissions to the International Atomic Time Scale - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services
ITU-R TF.458-2-1990 International Comparisons of Atomic Time Scales - Section 7B - Specifications for the Standard-Frequency and Time-Signal Services

National Metrological Technical Specifications of the People's Republic of China, Frequency Standard Unit

JJF 1958-2021 Calibration Specification for Cesium Atomic Frequency Standards
JJF 1956-2021 Calibration Specification for Hydrogen Atomic Frequency Standards
JJF 1957-2021 Calibration Specification for Rubidium Atomic Frequency Standards
JJF 1206-2018 Time and Frequency Standard Remote Calibration Specification
JJF 1760-2019 Calibration Specification for Standard Slices of Single Crystal Silicon Resistivity
JJF 1206-2008 Calibration Specification for the Remote Calibration for Frequency Standard and Digital Clock

Taiwan Provincial Standard of the People's Republic of China, Frequency Standard Unit

CNS 12993-2006 Packaging - Complete, filled transport packages and unit loads - Vibration tests at fixed low frequency
CNS 14994-2006 Packaging - Complete, filled transport packages and unit loads - Sinusoidal vibration tests using a variable frequency
CNS 14653-2002 Acoustics - Determination of sound power levels of noise sources - Guidelines for the use of basic standards

American Society for Testing and Materials (ASTM), Frequency Standard Unit

ASTM C1209-05 Standard Terminology of Concrete Masonry Units and Related Units
ASTM C1209-01 Standard Terminology of Concrete Masonry Units and Related Units
ASTM C1209-99a Standard Terminology of Concrete Masonry Units and Related Units
ASTM C1209-01a Standard Terminology of Concrete Masonry Units and Related Units
ASTM C1209-05e1 Standard Terminology of Concrete Masonry Units and Related Units
ASTM F1491-93(1997) Standard Specification for An Avalanche Beacon Frequency
ASTM C1781/C1781M-18e1 Standard Test Method for Surface Infiltration Rate of Permeable Unit Pavement Systems
ASTM C1781/C1781M-18 Standard Test Method for Surface Infiltration Rate of Permeable Unit Pavement Systems
ASTM C1405-20 Standard Specification for Glazed Brick (Single Fired, Brick Units)
ASTM C1405-19 Standard Specification for Glazed Brick (Single Fired, Brick Units)
ASTM C1405-20a Standard Specification for Glazed Brick (Single Fired, Brick Units)
ASTM C29/C29M-07 Standard Test Method for Bulk Density ("Unit Weight") and Voids in Aggregate
ASTM C1781/C1781M-13 Standard Test Method for Surface Infiltration Rate of Permeable Unit Pavement Systems
ASTM A1036-04(2020) Standard Guide for Measuring Power Frequency Magnetic Properties of Flat-Rolled Electrical Steels Using Small Single Sheet Testers
ASTM C270-06 Standard Specification for Mortar for Unit Masonry
ASTM C279-88(1995)e1 Standard Specification for Chemical-Resistant Masonry Units
ASTM D558-04 Standard Test Methods for Moisture-Density (Unit Weight) Relations of Soil-Cement Mixtures
ASTM F2057-17 Standard Safety Specification for Clothing Storage Units
ASTM C140/C140M-18a Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140/C140M-20 Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140/C140M-18 Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140/C140M-17b Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140/C140M-20a Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140-01 Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM B830-97 Standard Specification for Uniform Test Methods and Frequency
ASTM B830-97(2003) Standard Specification for Uniform Test Methods and Frequency
ASTM C1791-16(2021) Standard Guide for Reduction of Efflorescence Potential in New Unit Pavement Systems
ASTM C1791-16 Standard Guide for Reduction of Efflorescence Potential in New Unit Pavement Systems
ASTM C1552-08a Standard Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
ASTM C1552-09 Standard Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
ASTM C1552-08 Standard Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
ASTM C1552-16 Standard Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
ASTM C140/C140M-13a Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C140/C140M-14 Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
ASTM C90-00 Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-01a Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-02a Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-01 Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-02 Standard Specification for Loadbearing Concrete Masonry Units
ASTM D3880-90(1999) Standard Test Method for Asbestos Strength Units
ASTM D3880-90(2004)e1 Standard Test Method for Asbestos Strength Units
ASTM F436M-10 Standard Specification for Hardened Steel Washers [Metric]
ASTM D3880-90(2004) Standard Test Method for Asbestos Strength Units
ASTM C90-11a Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-11b Standard Specification for Loadbearing Concrete Masonry Units
ASTM D3880/D3880M-90(2017) Standard Test Method for Asbestos Strength Units
ASTM B830-11 Standard Specification for Uniform Test Methods and Frequency
ASTM B830-18 Standard Specification for Uniform Test Methods and Frequency
ASTM C129-00a Standard Specification for Nonloadbearing Concrete Masonry Units
ASTM C90-05 Standard Specification for Loadbearing Concrete Masonry Units
ASTM C90-05a Standard Specification for Loadbearing Concrete Masonry Units
ASTM B135M-08a Standard Specification for Seamless Brass Tube [Metric]
ASTM C90-16a Standard Specification for Loadbearing Concrete Masonry Units
ASTM F744M-10 Standard Test Method for Measuring Dose Rate Threshold for Upset of Digital Integrated Circuits [Metric]
ASTM D4716/D4716M-22 Standard Test Method for Determining the (In-plane) Flow Rate per Unit Width and Hydraulic Transmissivity of a Geosynthetic Using a Constant Head
ASTM D1814-70(2000) Standard Test Method for Measuring Thickness of Leather Units
ASTM C129-05 Standard Specification for Nonloadbearing Concrete Masonry Units
ASTM D1814-70(2021) Standard Test Method for Measuring Thickness of Leather Units
ASTM C129-14 Standard Specification for Nonloadbearing Concrete Masonry Units
ASTM E2530-06 Standard Practice for Calibrating the Z-Magnification of an Atomic Force Microscope at Subnanometer Displacement Levels Using Si(111) Monatomic Steps
ASTM C331-01 Standard Specification for Lightweight Aggregates for Concrete Masonry Units
ASTM C331-00 Standard Specification for Lightweight Aggregates for Concrete Masonry Units
ASTM C331-04 Standard Specification for Lightweight Aggregates for Concrete Masonry Units
ASTM D3776-09 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D5432-12 Standard Performance Specification for Blanket Products for Institutional and Household Use
ASTM D3776/D3776M-20 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D3880/D3880M-90(2009)e1 Standard Test Method for Asbestos Strength Units
ASTM D3937-94 Standard Test Method for Crimp Frequency of Manufactured Staple Fibers
ASTM D3937-01 Standard Test Method for Crimp Frequency of Manufactured Staple Fibers
ASTM D3937-12(2018) Standard Test Method for Crimp Frequency of Manufactured Staple Fibers
ASTM E95-68(2022) Standard Specification for Cell-Type Oven with Controlled Rates of Ventilation
ASTM D3942-03 Standard Test Method for Determination of the Unit Cell Dimension of a Faujasite-Type Zeolite
ASTM D3942-97 Standard Test Method for Determination of the Unit Cell Dimension of a Faujasite-Type Zeolite
ASTM C1006-84(2001) Standard Test Method for Splitting Tensile Strength of Masonry Units
ASTM D8-21 Standard Terminology Relating to Materials for Roads and Pavements
ASTM C331/C331M-10 Standard Specification for Lightweight Aggregates for Concrete Masonry Units
ASTM C1006-84(1996)e1 Standard Test Method for Splitting Tensile Strength of Masonry Units
ASTM D3776/D3776M-09ae2 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM C1006/C1006M-19 Standard Test Method for Splitting Tensile Strength of Masonry Units
ASTM C1006/C1006M-20 Standard Test Method for Splitting Tensile Strength of Masonry Units
ASTM C1006/C1006M-20a Standard Test Method for Splitting Tensile Strength of Masonry Units
ASTM D899-00(2018) Standard Practice for Applied Weight Per Unit Area of Liquid Adhesive
ASTM C331/C331M-14 Standard Specification for Lightweight Aggregates for Concrete Masonry Units
ASTM D3776/D3776M-09a(2013) Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D3776/D3776M-09a(2017) Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D8-16a Standard Terminology Relating to Materials for Roads and Pavements
ASTM D8-16 Standard Terminology Relating to Materials for Roads and Pavements
ASTM F1729-96 Standard Practice for Single Person Cold Water Survival/Rescue Technique: HELP Position
ASTM C29/C29M-97 Standard Test Method for Bulk Density ("Unit Weight") and Voids in Aggregate
ASTM F1729-96(2001) Standard Practice for Single Person Cold Water Survival/Rescue Technique: HELP Position
ASTM D3776/D3776M-09ae1 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM B137-95(2009) Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
ASTM D3776/D3776M-09a Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM C29/C29M-97(2003) Standard Test Method for Bulk Density ("Unit Weight") and Voids in Aggregate
ASTM F1270-97(2023) Standard Practice for Preparing and Locating Emergency Muster Lists
ASTM F1729-96(2020) Standard Practice for Single Person Cold Water Survival/Rescue Technique: HELP Position
ASTM C29/C29M-17a Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate
ASTM D6639-18 Standard Guide for Using the Frequency Domain Electromagnetic Method for Subsurface Site Characterizations
ASTM A717/A717M-95 Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717/A717M-01 Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717/A717M-06 Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717/A717M-12(2018) Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717/A717M-12(2022) Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717/A717M-12 Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM D6881/D6881M-03(2020) Standard Classification for Standard Plastics Industry Bulk Box/Pallet Unit Size Classified By Bulk Density
ASTM D5793-18(2022) Standard Test Method for Binding Sites per Unit Length or Width of Pile Yarn Floor Coverings
ASTM D7937-15(2023) Standard Test Method for In-situ Determination of Turbidity Above 1 Turbidity Unit (TU) in Surface Water
ASTM C899-79(1997) Standard Practice for Use of Metric Units of Measure for Reporting Properties of Refractory Materials
ASTM D6242-98(2004) Standard Test Method for Mass Unit Area of Nonwoven Fabrics
ASTM D6242-98 Standard Test Method for Mass Unit Area of Nonwoven Fabrics
ASTM D3776-07 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM B137-95(2000) Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
ASTM D5378-93(2000) Standard Performance Specification for Woven and Knitted Shower Curtains for Institutional and Household Use
ASTM F2737-10 Standard Specification for Corrugated High Density Polyethylene (HDPE) Water Quality Units
ASTM F2737-10a Standard Specification for Corrugated High Density Polyethylene (HDPE) Water Quality Units
ASTM D5261-10 Standard Test Method for Measuring Mass per Unit Area of Geotextiles
ASTM F1836M-09 Standard Specification for Stuffing Tubes, Nylon, and Packing Assemblies (Metric)
ASTM D5261-10(2018) Standard Test Method for Measuring Mass per Unit Area of Geotextiles
ASTM B137-95(2021) Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
ASTM B137-95(2014) Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
ASTM D3942-03(2013) Standard Test Method for Determination of the Unit Cell Dimension of a Faujasite-Type Zeolite
ASTM D5378-12 Standard Performance Specification for Woven and Knitted Shower Curtains for Institutional and Household Use
ASTM D4253-00 Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table
ASTM D4253-00(2006) Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table
ASTM D4254-00(2006)e1 Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density
ASTM D5410-93(1998) Standard Guide for Set of Data Elements to Describe a Ground-Water Site; Part Three-Usage Descriptors
ASTM D5410-93(2007) Standard Guide for Set of Data Elements to Describe a Ground-Water Site; Part Three-Usage Descriptors
ASTM C139-73 Standard Specification for Concrete Masonry Units For Construction Of Catch Basins And Manholes
ASTM D5848-05 Standard Test Method for Mass Per Unit Area of Pile Yarn Floor Coverings
ASTM D899-00(2007) Standard Practice for Applied Weight Per Unit Area of Liquid Adhesive
ASTM D6566-00(2006) Standard Test Method for Measuring Mass per Unit Area of Turf Reinforcement Mats
ASTM D5261-92(1996) Standard Test Method for Measuring Mass per Unit Area of Geotextiles
ASTM D3776-96(2002) Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D3776-96 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
ASTM D6566-00 Standard Test Method for Measuring Mass per Unit Area of Turf Reinforcement Mats
ASTM D6664-01 Standard Specification for Woven, Knitted and Flocked Bedspread Products for Institutional and Household Use
ASTM SI10-02 IEEE/ASTM SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
ASTM D899-00 Standard Practice for Applied Weight Per Unit Area of Liquid Adhesive
ASTM D898-96 Standard Test Method for Applied Weight Per Unit Area of Dried Adhesive Solids
ASTM E2810-11(2017) Standard Practice for Demonstrating Capability to Comply with the Test for Uniformity of Dosage Units
ASTM D8122-21 Standard Test Method for Determining Mass per Unit Area of Geohazard Nettings
ASTM E2810-19 Standard Practice for Demonstrating Capability to Comply with the Test for Uniformity of Dosage Units
ASTM F1883-20 Standard Practice for Selection of Wire and Cable Size in AWG or Metric Units
ASTM D7725-17 Standard Test Method for the Continuous Measurement of Turbidity Above 1 Turbidity Unit (TU)
ASTM D898-05 Standard Test Method for Applied Weight Per Unit Area of Dried Adhesive Solids
ASTM D6566-18(2023) Standard Test Method for Measuring Mass Per Unit Area of Turf Reinforcement Mats
ASTM D5848-20 Standard Test Method for Mass Per Unit Area of Pile Yarn Floor Coverings
ASTM C29/C29M-09 Standard Test Method for Bulk Density ("Unit Weight") and Voids in Aggregate
ASTM C1791-14a Standard Guide for Reduction of Efflorescence Potential in New Unit Pavement Systems
ASTM C1791-15 Standard Guide for Reduction of Efflorescence Potential in New Unit Pavement Systems
ASTM D6566-14 Standard Test Method for Measuring Mass per Unit Area of Turf Reinforcement Mats
ASTM D899-00(2013) Standard Practice for Applied Weight Per Unit Area of Liquid Adhesive
ASTM A1058-09 Standard Test Methods for Mechanical Testing of Steel Productsx2014;Metric
ASTM C29/C29M-23 Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate

Professional Standard - Electron, Frequency Standard Unit

SJ 20247-1993 Verification regulation of HF digital phase standard
SJ/T 9512-1993 Quality classifing standard for frequency counter
SJ/T 9548.3-1993 Quality grading standard for low-power wirewound and non-wirewound potentiometers

RO-ASRO, Frequency Standard Unit

STAS 2701-1979 SI UNIT LENGTH PRIMARY STANDARD
STAS 8975-1971 Centralized network control installations STANDARD FREQUENCIES
STAS 9490-1987 Acoustics NORMALIZED FREQUENCIES FOR ACOUSTICAL MEASUREMENTS

Zhejiang Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB3301/T 0283-2019 Evaluation criteria for water-saving units
DB3301/T 0242-2018 Specifications for the Evaluation of Tourism Standardization Demonstration Units

SE-SIS, Frequency Standard Unit

SIS SS-ISO 16:1985 Acoustics — Standard tuning frequency (Standard musical pitch)
SIS 01 61 11-1971 Quantities and units. List of Swedish standards
SIS 01 61 11-1979 Quantities and units — List of Swedish standards
SIS 1-1988 Quantities and units - List of Swedish standards
SIS 8-1987 Quantities and units - Selection of Swedish standards
SIS SS 01 66 02-1982 Swedish metal standards - Quantities and units - Symbols and designations

German Institute for Standardization, Frequency Standard Unit

DIN 1317-3:1962 Standard Tuning; Tuning Frequency for Organs
DIN EN 303098:2019-05 Maritime low power personal locating devices employing AIS - Harmonised Standard for access to radio spectrum (Endorsement of the English version EN 303 098 V2.2.1 (2019-02) as German standard) / Note: DIN ETS standards collection*Endorsement notice
DIN EN 60196:2010 IEC standard frequencies (IEC 60196:2009); German version EN 60196:2009
DIN EN 300152-2:2001 Electromagnetic compatibility and Radio spectrum Matters (ERM) - Maritime Emergency Position Indicating Radio Beacons (EPIRBs) intended for use on the frequency 121,5 MHz or the frequencies 121,5 MHz and 243 MHz for homing purposes only - Part 2: Harmonis
DIN EN 300152-3:2002 Electromagnetic compatibility and Radio spectrum Matters (ERM) - Maritime Emergency Position Indicating Radio Beacons (EPIRBs) intended for use on the frequency 121,5 MHz or the frequencies 121,5 MHz and 243 MHz for homing purposes only - Part 3: Harmonis
DIN EN ISO 1127:1997 Stainless steel tubes - Dimensions, tolerances and conventional masses per unit length (ISO 1127:1992); German version EN ISO 1127:1996
DIN EN 300152-1:2001 Electromagnetic compatibility and Radio spectrum Matters (ERM) - Maritime Emergency Position Indicating Radio Beacons (EPIRBs) intended for use on the frequency 121,5 MHz or the frequencies 121,5 MHz and 243 MHz for homing purposes only - Part 1: Technica
DIN EN 62129-2:2012-03 Calibration of wavelength/optical frequency measurement instruments - Part 2: Michelson interferometer single wavelength meters (IEC 62129-2:2011); German version EN 62129-2:2011

AASHTO - American Association of State Highway and Transportation Officials, Frequency Standard Unit

T 19M/T 19-2000 Standard Method of Test for Bulk Density ( Unit Weight ) and Voids in Aggregate
T19/T19M-1993 Standard Specification for Unit Weight and Voids in Aggregate (Eighteenth Edition; ASTM C29/C29M-91a)
R 1-2004 Standard Recomended Practice for Use of the International System of Units
T19/T19M-2000 "Standard Method of Test for Bulk Density (""Unit Weight"") and Voids in Aggregate (Twentieth Edition; ASTM C29/C29M-97)"

American National Standards Institute （ANSI), Frequency Standard Unit

ANSI/IEEE 260.1:2004 Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
ANSI/IEEE 1193:2003 Guide for Measurement of Environmental Sensitivities of Standard Frequency
ANSI/IEEE 270:2006 Standard Definitions for Selected Quantities, Units, and Related Terms, with Special Attention to the International System of Units (SI)
ANSI/IEEE/ASTM SI10:2011 Standard for Use of the International System of Units (SI): The Modern Metric System
ANSI/ASME RA-Sa-2009 Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications
ANSI/ASME RA-Sb-2010 Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications
ANSI/IEEE Std1193:1994 Guide for Measurement of Environmental Sensitivities of Standard Frequency / Note: Approved 1994-12-14.
BS EN ISO 9073-1:2023 Nowovens. Test methods Determination of mass per unit area (British Standard)

Professional Standard - Water Conservancy, Frequency Standard Unit

SL 308-2004 Qualification standards of water supply works for villages and towns
SL 308-2004（条文说明） Qualification standard of water supply works for villages and towns(explanation)
SLJ 705-1981 Trial Standards for Compilation and Quota of Water Conservancy Project Management Units

Cooling Technology Institute, Frequency Standard Unit

CTI STD-145-1995 International System of Units (SI) Conversion Standard

Inner Mongolia Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB15/T 1896-2020 Fire Safety Evaluation Standards for Units

Tianjin Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB12/T 415-2009 Unit fire safety management standards
DB12/T 533-2014 Standard numbering rules for the service standard system of public service units
DB12/T 532-2014 Standardization Work Guidelines for Public Service Units

PL-PKN, Frequency Standard Unit

PN E02115-1960 Electrical machines. One-phase synchronous generators of fre?uency from 1200 to 9600 Hz. Standard ratings
PN Z01001 Arkusz 00-1974 Air purity protection Terminology, definitions and units Introduction and scope of the standard

Acoustical Society of America (ASA), Frequency Standard Unit

ASA S12.58-2012 American National Standard Sound Power Level Determination for Sources Using a Single-source Position

Military Standard of the People's Republic of China-General Armament Department, Frequency Standard Unit

GJB 6752-2009 Verification regulation for hydrogen atomic frequency standard
GJB 2215-1994 General requirements for cesium beam tube frequency standards
GJB/J 3073-1997(XG1-2015) Global Positioning System (GPS) Time and Frequency Receiver Calibration Regulations Modification Sheet 1-2015
GJB 9212-2017 General specifications for taming time and frequency standards

TIA - Telecommunications Industry Association, Frequency Standard Unit

TIA/EIA/IS-801-1999 Position Determination Service Standard for Dual Mode Spread Spectrum Systems
TIA/EIA/IS-801-1-2001 Position Determination Service Standards for Dual Mode Spread Spectrum Systems (Addendum 1)

ECIA - Electronic Components Industry Association, Frequency Standard Unit

RS-161-1956 Ceramic Based Printed Circuits@ Unit Standards for

Electronic Components, Assemblies and Materials Association, Frequency Standard Unit

ECA RS-161-1956(R1970) Ceramic Based Printed Circuits, Unit Standards for
ECA RS-161-1956 Ceramic Based Printed Circuits, Unit Standards for

Shandong Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB37/T 5239-2022 Water-saving enterprise (unit) evaluation standard

Jiangsu Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB32/T 4174-2021 Greening Standards for Urban Residential Areas and Units
DB32/T 3194-2017 Safety production standardization specification for transportation ship lock units

ETSI - European Telecommunications Standards Institute, Frequency Standard Unit

ETSI EN 303 098:2018 Maritime low power personal locating devices employing AIS; Harmonised Standard for access to radio spectrum (V2.2.1)
ETSI EN 303 098:2019 Maritime low power personal locating devices employing AIS; Harmonised Standard for access to radio spectrum (V2.2.1)

European Telecommunications Standards Institute (ETSI), Frequency Standard Unit

ETSI EN 300 152-3-2001 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Maritime Emergency Position Indicating Radio Beacons (EPIRBs) Intended for Use on the Frequency 121,5 MHz or the Frequencies 121,5 MHz and 243 MHz for Homing Purposes Only; Part 3: Harmonized

KE-KEBS, Frequency Standard Unit

KS 06-08-1976 KENYA STANDARD S. I. UNITS AND RECOMMENDATIONS FOR THE USE OF THEIR MULTIPLES AND OF CERTAIN OTHER UNITS
KS 08-120-1981 KENYA STANDARD METHOD FOR DETERMINATION OF MASS PER UNIT LENGTH AND MASS PER UNIT AREA OF WOVEN OR KNITTED FABRICS
KS 04-53-1978 KENYA STANDARD SPECIFICATION FOR VOLTAGES AND FREQUENCY FOR A.C. TRANSMISSION AND DISTRIBUTION SYSTEMS

Professional Standard - Energy, Frequency Standard Unit

NB/T 11112-2023 Coal construction project unit project division standard

Gansu Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB62/T 2475-2014 Fire safety assessment standards for high-fire risk units

CZ-CSN, Frequency Standard Unit

CSN 33 0128-1984 Standard frequencies in tho range of 0,1 to 10000 Hz and their tolerances .
CSN 34 0033-1966 Standard frequencies in the range of 0,1 to 10 000 Hz and their tolerances

PK-PSQCA, Frequency Standard Unit

PS 1331-1983 SPECIFICATION FOR STANDARD FREQUENCIES FOR CENTRALIZED NETWORK CONTROL INSTALLATIONS

European Committee for Standardization (CEN), Frequency Standard Unit

EN ISO 10893-10:2011 Non-destructive testing of steel tubes - Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-10:2011)
EN ISO 80000-8:2020 Quantities and units - Part 8: Acoustics (ISO 80000-8:2020)
EN ISO 80000-8:2007 Quantities and units - Part 8: Acoustics (ISO 80000-8:2007)

North Atlantic Treaty Organization Standards Agency, Frequency Standard Unit

STANAG 4203-2007 TECHNICAL STANDARDS FOR SINGLE CHANNEL HF RADIO EQUIPMENT
STANAG 4204-2008 TECHNICAL STANDARDS FOR SINGLE CHANNEL VHF RADIO EQUIPMENT
STANAG 2201-1970 STANDARD UNIT OF VERTICAL MEASURE TO BE SHOWN ON LAND MAPS

ZA-SANS, Frequency Standard Unit

SANS 10053:2001 The standard viscosity classification of industrial lubricating oils (metric units)
SANS 804,805,806+807:1970 STANDARD SPECIFICATION FOR ELECTROLYTIC TOUGH PITCH HIGH CONDUCTIVITY COPPER (Metric Units)

Anhui Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB34/T 2687-2016 Evaluation Criteria for Economical Public Institutions (Demonstration Units)

Jiangxi Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB36/ 615.1-2011 Guidelines for Safety Standardization of Geological Exploration Units
DB36/T 615.1-2019 Safety Standardization Specifications for Geological Exploration Units Part 1: Guidelines

American Society of Mechanical Engineers (ASME), Frequency Standard Unit

ASME SI-9-1981 Guide for metrication of codes and standards SI (metric) units
ASME RA-S-1.1-2022 Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications
ASME RA-S-2008(R2019) Standard for Level 1 / Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications
ASME SI-9 Errata-1982 Guide for metrication of codes and standards SI (metric) units

Fujian Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB35/T 1445-2014 Safety production standardization specification for geological exploration units

IEEE - The Institute of Electrical and Electronics Engineers@ Inc., Frequency Standard Unit

IEEE 127-1963 STANDARD FOR AEROSPACE EQUIPMENT VOLTAGE AND FREQUENCY RATINGS
IEEE 1193-1994 Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators
IEEE 86-1975 STANDARD DEFINITIONS OF BASIC PER-UNIT QUANTITIES FOR ALTERNATING-CURRENT ROTATING MACHINES
IEEE 208-1995 Standard on Video Techniques: Measurement of Resolution of Camera Systems@ 1993 Techniques
IEEE 285-1968 Standards Report State-of-the-Art of MEASURING PHASE SHIFT AT FREQUENCIES ABOVE 1 ghZ
IEEE 192-1958 STANDARDS ON RECORDING AND REPRODUCING: METHODS OF CALIBRATION OF MECHANICALLY- RECORDED LATERAL FREQUENCY RECORDS@ 1958

Aeronautical Radio Inc., Frequency Standard Unit

ARINC 628P1-3 ITEM 3.0 Interchangeability Standards New Generation Audio Reproducer Unit (ARU)

Shanxi Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB14/T 735-2013 Energy Consumption Limit Standard for Unit Product of Autoclaved Gas Refilling

Ningxia Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB64/T 587-2021 "Four Capabilities" Construction Standards for Fire Safety of Social Units
DB64/T 594-2021 Warehousing and logistics unit fire safety "four capabilities" construction standards

IT-UNI, Frequency Standard Unit

US-FCR, Frequency Standard Unit

FCR 21 CFR PART 1030-2015 PERFORMANCE STANDARDS FOR MICROWAVE AND RADIO FREQUENCY EMITTING PRODUCTS
FCR 21 CFR PART 1030-2013 PERFORMANCE STANDARDS FOR MICROWAVE AND RADIO FREQUENCY EMITTING PRODUCTS
FCR 21 CFR PART 1030-2014 PERFORMANCE STANDARDS FOR MICROWAVE AND RADIO FREQUENCY EMITTING PRODUCTS

ES-UNE, Frequency Standard Unit

IEEE 1193-2022 IEEE Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators

Shaanxi Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB61/T 1507-2021 Standardized Assessment and Grading Specifications for Safety Production of Military Industrial Units

CN-STDBOOK, Frequency Standard Unit

图书 3-8740 Standardized Practice of Fixed Assets Management in Administrative Institutions

未注明发布机构, Frequency Standard Unit

DIN EN 303345-2:2020 Audio broadcasting receivers – Part 2: MW audio broadcasting service – Harmonized standard for the use of radio frequencies
DIN EN 303345-5:2020 Audio broadcast receivers – Part 5: DRM audio broadcast service – Harmonized standard for the use of radio frequencies

Professional Standard-Safe Production, Frequency Standard Unit

AQ 3013-2008 General norms for safety standardization of hazardous chemical enterprises

GOSTR, Frequency Standard Unit

GOST R 8.967-2019 State system for ensuring the uniformity of measurements. Transfer units of time, frequency and time scale national UTC(SU) from the State primary standard of the Russian Federation with the use of the GLONASS system. Classification. Measurement uncertain

TH-TISI, Frequency Standard Unit

TIS 121.12-2010 Standard test methods for textiles.part 12: woven fabrics.determination of mass per unit length and mass per unit area

SAE - SAE International, Frequency Standard Unit

SAE AS6254A-2015 Minimum Performance Standard for Low Frequency Underwater Locating Devices (Acoustic) (Self-Powered)
SAE J1113-3-1995 Conducted Immunity@ 250 kHZ to MHz@ Direct Injection of Radio Frequency (RF) Power@ Standard

NATO - North Atlantic Treaty Organization, Frequency Standard Unit

STANAG 4203-1988 Technical Standards for Single Channel HF Radio Equipment (ED 2 AMD 0; To obtain please contact your national Defense Standardization Office or the NATO Standardization Office website: http:/ so.nato.int so@ Phone: +32 (0)2 – 707 5556@ email: nso@nso.nato

Guizhou Provincial Standard of the People's Republic of China, Frequency Standard Unit

DB52/T 1401.39-2021 Mountain Tourism Part 39: Specifications for the Evaluation of Standardized Demonstration Units

CENELEC - European Committee for Electrotechnical Standardization, Frequency Standard Unit

EN 62129-2:2011 Calibration of wavelength/optical frequency measurement instruments - Part 2: Michelson interferometer single wavelength meters