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signal to noise ratio

signal to noise ratio, Total:499 items.

In the international standard classification, signal to noise ratio involves: Optoelectronics. Laser equipment, Electronic tubes, Audio, video and audiovisual engineering, Piezoelectric and dielectric devices, Fibre optic communications, Radiocommunications, Acoustics and acoustic measurements, Interface and interconnection equipment, Electricity. Magnetism. Electrical and magnetic measurements, Aids for disabled or handicapped persons, Television and radio broadcasting, Telecommunication systems, Cinematography, IT terminal and other peripheral equipment, Office machines, Domestic safety, Alarm and warning systems, Home economics in general, Occupational safety. Industrial hygiene, Road vehicle systems, Semiconductor devices, Road engineering, Graphical symbols, Materials and components for railway engineering, Character sets and information coding, Safety of machinery, Electromagnetic compatibility (EMC), Ergonomics, Lamps and related equipment, Railway engineering in general, Printed circuits and boards, Information technology (IT) in general, Machine tool systems, Applications of information technology, Mobile services, Telecommunication terminal equipment, Leisure. Tourism, Power transmission and distribution networks, Telecommunications in general, Colour coding, Accident and disaster control, Construction of waterways and ports, Transport, Shipbuilding and marine structures in general, Optics and optical measurements, Railway rolling stock, Construction of railways, Components and accessories for telecommunications equipment, Networking, On-board equipment and instruments.

RU-GOST R, signal to noise ratio

GOST 11612.5-1975 Photomultipliers. Method of measuring signal to "noise in signal" ratio
GOST 21815.19-1990 Image intensifier and image converter tubes. Methods of measuring the signal-to-noise ratio
GOST 18720.11-1976 Television camera tubes. Methods of measurement for signal-tu-noise ratio
GOST R 53032-2008 Noise of machines. Measurement of noise emitted by information technology and telecommunications equipment
GOST 28749-1990 Signal conversion equipments for simultaneous duplex data transmission on the switched channels general telephone network with the speed 2400 bit/s. Types and basic parameters
GOST R 59502-2021 Unified symbols in the field of information and telecommunication systems
GOST 7703-1974 Signalling shapes of ship. Specifications
GOST 23595-1979 Control signals, line and acoustic signals of the single frequency signalling system for the trunk and intrazone telephone network. Electrical parameters and measuring methods
GOST R 50782-1995 The on-board system for transmitting the warning signals from the spacecrafts. Parameters of the radio link signals

National Electrical Manufacturers Association（NEMA), signal to noise ratio

NEMA MS 1-2008 Determination of Signal-to-Noise Ratio (SNR) in Diagnostic Magnetic Resonance Imaging
NEMA MS 1-2001 Determination of Signal-to-Noise (SNR) in Diagnostic Magnetic Resonance Imaging
NEMA MS 6-2008 Determination of Signal-to-Noise Ratio and Image Uniformity for Single-Channel Non-Volume Coils in Diagnostic MR Imaging

AENOR, signal to noise ratio

UNE 20883:1993 MEASURING METHOD FOR CHROMINANCE SIGNAL-TO-RANDOM NOISE RATIO FOR VIDEO.
UNE-CLC/TS 50509:2009 EX Use of LED signal heads in road traffic signal systems
UNE 20800-1:1986 ANALOGUE SIGNALS FOR PROCESS CONTROL SYSTEMS. PART 1: DIRECT CURRENT SIGNALS
UNE-EN 50129:2005 Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling
UNE 20800-2:1986 ANALOGUE SIGNALS FOR PROCESS CONTROL SYSTEMS. PART 2: DIRECT VOLTAGE SIGNALS
UNE-EN ISO 7779:2011 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)

International Telecommunication Union (ITU), signal to noise ratio

ITU-R INFORME BT.484-2 SPANISH-1986 RATIO OF PICTURE-SIGNAL TO SYNCHRONIZING-SIGNAL
ITU-R RAPPORT BT.484-2 FRENCH-1986 RATIO OF PICTURE-SIGNAL TO SYNCHRONIZING-SIGNAL
ITU-R REPORT BT.484-2-1986 Ratio of picture-signal to synchronizing-signal
ITU-R F.339-7-2006 Bandwidths, signal-to-noise ratios and fading allowances in complete systems
ITU-T J.62-1989 Single Value of the Signal-to-Noise Ratio for All Television Systems - Line Transmission of Non-Telephone Signals - Transmission of Sound-Programme and Television Signals (Study Group XV) 1 pp
ITU-R F.339-7 SPANISH-2006 Bandwidths, signal-to-noise ratios and fading allowances in complete systems Anchuras de banda, relaciones se馻l/ruido y m醨genes para el desvanecimiento en sistemas fijos de alta frecuencia
ITU-R BT.815-1-1994 Specification of a signal for measurement of the contrast ratio of displays
ITU-R RAPPORT BT.2005 FRENCH-1995 Bit-Rate Reduction for Digital TV Signals
ITU-R BT.815-1 SPANISH-1994 Specification of a signal for measurement of the contrast ratio of displays
ITU-R BT.815-1 FRENCH-1994 Specification of a signal for measurement of the contrast ratio of displays
ITU-R BT.815-1994 Specification of a signal for measurement of the contrast ratio of displays
ITU-R RAPPORT BS.1058 FRENCH-1986 Minimum AF and RF signal-to-noise ratio required for broadcasting in band 7 (HF)
ITU-R F.339-8-2013 Bandwidths, signal-to-noise ratios and fading allowances in HF fixed and land mobile radiocommunication systems
ITU-R F.339-2013 Bandwidths, signal-to-noise ratios and fading allowances in HF fixed and land mobile radiocommunication systems
ITU-T H.263 SPANISH-2005 Video coding for low bit rate communication study Group 16
ITU-T H.263 FRENCH-2005 Video coding for low bit rate communication study Group 16
ITU-T Q.151-1988 Signal code for register signalling
ITU-T Q.320-1988 Signal code for register signalling
ITU-T Q.121-1989 Signal Code - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 6 pp
ITU-R REPORT BS.1058-1986 Minimum AF and RF signal-to-noise ratio required for broadcasting in band 7 (HF)
ITU-T J.240 SPANISH-2004 Framework for remote monitoring of transmitted picture Signal-to-Noise ratio using spread-spectrum and orthogonal transform
ITU-R INFORME BS.1058 SPANISH-1986 Minimum AF and RF signal-to-noise ratio required for broadcasting in band 7 (HF)
ITU-R QUESTION 19-16-2009 Bit-rate reduction coding of audio signals for broadcasting applications
ITU-R QUESTION 19-1/6-2009 Bit-rate reduction coding of audio signals for broadcasting applications
ITU-R REPORT SM.2211-2011 Comparison of Time-Difference-of-Arrival and Angle-of-Arrival Methods of Signal Geolocation
ITU-T Q.474-1989 Signalling Procedures - Use of Group B Signals - Specifications of Signalling Systems R1 and R2 (Study Group XI) 3 pp
ITU-T O.131 FRENCH-1988 QUANTIZING DISTORTION MEASURING EQUIPMENT USING A PSEUDO-RANDOM NOISE TEST SIGNAL
ITU-T O.131 SPANISH-1988 QUANTIZING DISTORTION MEASURING EQUIPMENT USING A PSEUDO-RANDOM NOISE TEST SIGNAL
ITU-T Q.254-1988 2.1 Telephone Signals - Specifications of Signalling System No. 6 (Study Group XI) 4 pp
ITU-T Q.256-1988 2.3 Management Signals - Specifications of Signalling System No. 6 (Study Group XI) 1 pp
ITU-T Q.258-1988 3.2 Telephone Signals - Specifications of Signalling System No. 6 (Study Group XI) 8 pp
ITU-T Q.260-1988 3.4 Management Signals - Specifications of Signalling System No. 6 (Study Group XI) 5 pp
ITU-T Q.320-1989 Register Signalling- Signal Code for Register Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.411-1988 Line Signalling, Analogue Version-Line Signalling Code - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.122-1989 Signal Sender - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp
ITU-T Q.123-1989 Signal Receiver - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 3 pp
ITU-T Q.285-1988 Signal Priority Categories - Specifications of Signalling System No. 6 (Study Group XI) 1 pp
ITU-T Q.450-1989 Interregister Signalling - General - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.476-1989 Signalling Procedures - Abnormal Release of Outgoing and Incoming R2 Registers - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T J.82-1996 TRANSPORT OF MPEG-2 CONSTANT BIT RATE TELEVISION SIGNALS IN B-ISDN Study Group 9; 11 pp
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 Q.310-1988 Definition and Function of Signals - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.400-1988 Definitions and Functions of Signals - Forward Line Signals. Backward Line Signals. Forward Register Signals. Backward Register Signals - Specifications of Signalling Systems R1 and R2 (Study Group XI) 4 pp
ITU-T Q.2961.6 FRENCH-1998 Digital Subscriber Signalling System No. 2 – Additional traffic parameters: Additional signalling procedures for the support of the SBR2 and SBR3 ATM transfer capabilities
ITU-T Q.2961.6 SPANISH-1998 Digital Subscriber Signalling System No. 2 - Additional Traffic Parameters: Additional Signalling Procedures for the Support of the SBR2 and SBR3 ATM Transfer Capabilities
ITU-T Q.143-1989 Line Signal Sender - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp
ITU-T Q.144-1993 Line Signal Receiver - Specifications of Signalling System No. 5 Line Signalling (Study Group XI) 6 pp
ITU-T Q.153-1989 Multifrequency Signal Sender - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp
ITU-T Q.154-1989 Multifrequency Signal Receiver - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 2 pp
ITU-T Q.311-1988 Line Signalling-2600 Hz Line Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.312-1988 Line Signalling-2600 Hz Line Signal Sender (Transmitter) - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.314-1988 PCM Line Signalling Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.322-1989 Multifrequency Signal Sender - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.454-1989 Interregister Signalling - the Sending Part of the Multifrequency Signalling Equipment - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.455-1989 Interregister Signalling - the Receiving Part of the Multifrequency Equipment. Range, Speed and Reliability of Interregister Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 4 pp
ITU-T Q.112 FRENCH-1988 SIGNAL LEVELS AND SIGNAL RECEIVER SENSITIVITY
ITU-R BT.655-2004 Radio-frequency protection ratios for AM vestigial sideband terrestrial television systems interfered with by unwanted analogue vision signals and their associated sound signals
ITU-R BT.655-7-2004 Radio-frequency protection ratios for AM vestigial sideband terrestrial television systems interfered with by unwanted analogue vision signals and their associated sound signals
ITU-R BT.655-7 SPANISH-2004 Radio-frequency protection ratios for AM vestigial sideband terrestrial television systems interfered with by unwanted analogue vision signals and their associated sound signals
ITU-T Q.440-1989 Interregister Signalling - General - Specifications of Signalling Systems R1 and R2 (Study Group XI) 4 pp
ITU-T Q.451-1989 Interregister Signalling - Definitions - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T U.101 FRENCH-1993 SIGNALLING SYSTEMS FOR THE INTEX SERVICE (TYPES E AND F SIGNALLING)
ITU-T U.101 SPANISH-1993 SIGNALLING SYSTEMS FOR THE INTEX SERVICE (TYPES E AND F SIGNALLING)
ITU-T J.240-2004 Framework for remote monitoring of transmitted picture Signal-to-Noise ratio using spread-spectrum and orthogonal transform
ITU-T Q.3201-2007 EAP-based security signalling protocol architecture for network attachment (Study Group 11)
ITU-T Q.252-1988 1.2 Signal Transfer Time Definitions - Specifications of Signalling System No. 6 (Study Group XI) 2 pp
ITU-R F.555-1-1997 Permissible Noise in the Hypothetical Reference Circuit of Radio-Relay Systems for Television
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 BT.1729 FRENCH-2005 Common 16 × 9/4 × 3 aspect ratio digital television reference test pattern
ITU-R BT.1729 SPANISH-2005 Common 16 × 9/4 × 3 aspect ratio digital television reference test pattern
ITU-T J.67-2001 Test signals and measurement techniques for transmission circuits carrying MAC/packet signals Study Group 9
ITU-T Q.601 TO Q.695 ANNEX A-1993 Lists and meanings of FITEs, BITEs and SPITEs - Representation of information contents of signals of the signalling systems
ITU-T Q.255-1988 2.2 Signalling-System- Control Signals - Specifications of Signalling System No. 6 (Study Group XI) 2 pp
ITU-T Q.259-1988 3.3 Signalling-System- Control Signals - Specifications of Signalling Sytem No. 6 (Study Group XI) 4 pp
ITU-T Q.287-1988 7.3 Signal Transfer Time Requirements - Specifications of Signalling System No. 6 (Study Group XI) 3 pp
ITU-T Q.313-1988 2600 Hz Line Signal Receiving Equipment - Specifications of Signalling Systems R1 and R2 (Study Group XI) 3 pp
ITU-T Q.316-1988 PCM Line Signal Receiver - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.330-1989 Automatic Transmission and Signallimg Testing - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.478-1989 Signalling Procedures - Relay and Regeneration of R2 Interregister Signals by an Outgoing R2 Register in a Transit Exchange - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.480-1989 Signalling Procedures - Miscellaneous Procedures - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-T Q.253-1988 1.3 Association between Signalling and Speech Networks - Specifications of Signalling System (Study Group XI) 3 pp
ITU-R P.1148-1997 Standardized procedure for comparing predicted and observed HF sky-wave signal intensities and the presentation of such comparisons
ITU-T Q.617-1993 Interworking of Signalling Systems - Logic Procedures for Incoming Signalling System No. 7 (ISUP) (Study Group XI) 20 pp
ITU-T Q.454-1988 Multifrequency signalling equipment; The sending part of the multifrequency signalling equipment
ITU-T Q.466-1989 Signalling Procedures - Supervision and Release of the Call - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
ITU-T Q.300-1988 Interworking Between CCITT Signalling System No. 6 and National Common Channel Signalling Systems - Specifications of Signalling System No. 6 (Study Group XI) 4 pp
ITU-R BT.1729-2005 Common 16 × 9/4 × 3 aspect ratio digital television reference test pattern
ITU-R F.240-2006 Signal-to-interference protection ratios for various classes of emission in the fixed service below about 30 MHz
ITU-R V.607-3 FRENCH-2000 TERMS AND SYMBOLS FOR INFORMATION QUANTITIES IN TELECOMMUNICATIONS
ITU-R V.607-3 SPANISH-2000 TERMS AND SYMBOLS FOR INFORMATION QUANTITIES IN TELECOMMUNICATIONS
ITU-T Q.315-1988 PCM Line Signal Sender (Transmitter) - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-R INFORME BT.1212 SPANISH-1990 Measurements and test signals for digitally encoded colour television signals
ITU-R RAPPORT BT.1212 FRENCH-1990 Measurements and test signals for digitally encoded colour television signals
ITU-T Q.614-1993 Interworking of Signalling Systems - Logic Procedures for Incoming Signalling System No. 7 (TUP) (Study Group XI) 18 pp
ITU-R F.240-7-2006 Signal-to-interference protection ratios for various classes of emission in the fixed service below about 30 MHz
ITU-R F.240-7 FRENCH-2006 Signal-to-interference protection ratios for various classes of emission in the fixed service below about 30 MHz
ITU-R F.240-7 SPANISH-2006 Signal-to-interference protection ratios for various classes of emission in the fixed service below about 30 MHz
ITU-R M.441-1982 Signal-to-interference ratios and minimum field strengths required in the aeronautical mobile (R) service above 30 MHz
ITU-T Q.2961.3 FRENCH-1997 Digital Subscriber Signalling System No.2 - Additional Traffic Parameters: Signalling Capabilities to Support Traffic Parameters for the Available Bit Rate (ABR) ATM Transfer Capability
ITU-T Q.2961.3 SPANISH-1997 Digital Subscriber Signalling System No.2 - Additional Traffic Parameters: Signalling Capabilities to Support Traffic Parameters for the Available Bit Rate (ABR) ATM Transfer Capability
ITU-T J.19 FRENCH-1988 A CONVENTIONAL TEST SIGNAL SIMULATING SOUND - PROGRAMME SIGNALS FOR MEASURING INTERFERENCE IN OTHER CHANNELS
ITU-T J.19 SPANISH-1988 A CONVENTIONAL TEST SIGNAL SIMULATING SOUND - PROGRAMME SIGNALS FOR MEASURING INTERFERENCE IN OTHER CHANNELS
ITU-T G.7043 CORR 1-2006 Virtual concatenation of plesiochronous digital hierarchy (PDH) signals Corrigendum 1 Study Group 15; Also Listed as Y.1343
ITU-T G.7043 AMD 1-2005 Virtual concatenation of plesiochronous digital hierarchy (PDH) signals SERIES G: TRANSMISSION SYSTEMS AND MEDIA DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments General Study Group 15; Also Listed as Y.1343 AMD 1
ITU-T Q.27-1989 Transmission of the Answer Signal - General Recommendations on Telephone Switching and Signalling - Functions and Information Flow for Services in the ISDN - Supplements (Study Group XI) 1 pp
ITU-T Q.27 FRENCH-1988 TRANSMISSION OF THE ANSWER SIGNAL
ITU-T Q.27 SPANISH-1988 TRANSMISSION OF THE ANSWER SIGNAL
ITU-T G SUPP 56-2016 OTN transport of CPRI signals
ITU-T J.52 FRENCH-1996 Digital transmission of high-quality sound-programme signals using one, two or three 64 kbit/s channels per mono signal (and up to six per stereo signal)
ITU-T J.52 SPANISH-1996 Digital transmission of high-quality sound-programme signals using one, two or three 64 kbit/s channels per mono signal (and up to six per stereo signal)
ITU-T Q.422-1988 Line Signalling, Digital Version - Clauses for Exchange Line Signalling Equipment - Specifications of Signalling Systems R1 and R2 (Study Group XI) 6 pp
ITU-T H.120-1993 CODECS FOR VIDEOCONFERENCING USING PRIMARY DIGITAL GROUP TRANSMISSION
ITU-R P.1148-1-1997 Standardized Procedure for Comparing Predicted and Observed HF Sky-Wave Signal Intensities and the Presentation of Such Comparisons
ITU-T Q.615-1989 Logic Procedures for Incoming Signalling System R1 - Interworking of Signalling Systems (Study Group XI) 3 pp
ITU-T Q.616-1989 Logic Procedures for Incoming Signalling System R2 - Interworking of Signalling Systems (Study Group XI) 5 pp
ITU-T G.775-1998 Loss of Signal (LOS) Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) Defect Detection and Clearance Criteria for PDH Signals - Series G: Transmission Systems and Media Digital Systems and Networks - Digital Transmission Systems - Terminal
ITU-T J.52 AMD 1-1999 Digital Transmission of High-Quality Sound-Programme Signals Using One Two or Three 64 kbit/s Channels per Mono Signal (and up to Six per Stereo Signal) - Amd 1: New Appendix II - Extracts form EBU Specification of an ISDN Codec Capable of Delivering High
ITU-T J.52-1996 Digital Transmission of High-Quality Sound-Programme Signals Using One Two or Three 64 kbit/s Channels per Mono Signal (and up to Six per Stereo Signal) - Series J: Transmission of Sound-Programme and Television Signals Digital Transmission of Sound-Progr
ITU-T H.32-1989 Simultaneous Communication by Telephony and Telegraphy on a Telephone-Type Circuit - Line Transmission of Non-Telephone Signals Transmission of Sound-Programme and Television Signals (Study Group XV) 1 pp
ITU-R P.1148-1 FRENCH-1997 STANDARDIZED PROCEDURE FOR COMPARING PREDICTED AND OBSERVED HF SKY-WAVE SIGNAL INTENSITIES AND THE PRESENTATION OF SUCH COMPARISONS
ITU-R P.1148-1 SPANISH-1997 STANDARDIZED PROCEDURE FOR COMPARING PREDICTED AND OBSERVED HF SKY-WAVE SIGNAL INTENSITIES AND THE PRESENTATION OF SUCH COMPARISONS
ITU-T Q.421-1988 Line Signalling, Digital Version - Digital Line Signalling Code - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp
ITU-R BT.1120-7 FRENCH-2007 Digital interfaces for HDTV studio signals Interfaces num閞iques pour les signaux de TVHD en studio
ITU-T Q.251-1988 1.1 General - Specifications of Signalling System No. 6 (Study Group XI) 4 pp
ITU-R BS.646-1 SPANISH-1992 SOURCE ENCODING FOR DIGITAL SOUND SIGNALS IN BROADCASTING STUDIOS
ITU-R BS.646-1 FRENCH-1992 SOURCE ENCODING FOR DIGITAL SOUND SIGNALS IN BROADCASTING STUDIOS
ITU-T Q.604-1993 Interworking of Signalling Systems - Information Analysis Tables (Study Group XI) 5 pp
ITU-R INFORME BT.958-1 SPANISH-1986 Possibilities for incorporating the sound information in the video signal in terrestrial television
ITU-T J.67-1994 (WITHDRAWN) Test Signals and Measurement Techniques for Transmission Circuits Carrying MAC/Packet Signals or HD-MAC Signals - Television and Sound Transmission (Study Group 9) 39 pp (Formerly Recommendation ITU-R CMTT)
ITU-R 568-1978 (WITHDRAWN) Single Value of the Signal-to-Noise Ratio for All Television Systems - Section CMTT A - Television Transmission Standards and Performance Objectives
ITU-T Q.120-1989 Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp
ITU-T Q.140-1989 Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 3 pp
ITU-T P.501 ANNEX A-2004 (Pre-Published) Test Signals for TCL tests Annex A: SERIES P: TELEPHONE TRANSMISSION QUALITY, TELEPHONE INSTALLATIONS, LOCAL LINE NETWORKS Objective measuring apparatus
ITU-T H.34-1989 Subdivision of Frequency Band of a Telephone-Type Circuit between Telegraphy and Other Services - Line Transmission of Non-Telephone Signals - Transmission of Sound-Programme and Television Signals (Study Group XV) 1 pp
ITU-T Q.474-1988 Termination of interregister signalling; Use of group B signals
ITU-T Q.100 SUPP 3-1988 INFORMATION RECEIVED ON NATIONAL VOICE-FREQUENCY SIGNALLING SYSTEMS
ITU-T Q.265-1988 4.5 Speed of Switching and Signal Transfer in International Exchanges - Specifications of Signalling System No. 6 (Study Group XI) 1 pp
ITU-R REPORT BS.1065-1986 The RF spectrum of frequency-modulation sound-broadcasting transmitters
ITU-T H.100-1989 Visual Telephone Systems - Line Transmission of Non-Telephone Signals - Transmission of Sound-Programme and Television Signals (Study Group XV) 7 pp
ITU-R BT.1203-1-2006 User requirements for generic video bit-rate reduction coding of digital TV signals for an end-to-end television system
ITU-T Q.601-Q.695 ANNEX A-1993 Annex A Interworking of Signalling Systems - Lists and Meanings of FITEs BITEs and SPITEs - Representation of Information Contents of Signals of the Signalling Systems (Study Group XI) 34 pp
ITU-T Q.601-Q.695 ANNEX A SPANISH-1993 Interworking of Signalling Systems – Lists and meanings of FITEs, BITEs and SPITEs – Representation of information contents of signals of the Signalling Systems
ITU-T STIT FRENCH-2006 Security in Telecommunications and Information Technology Study Group 17
ITU-T STIT SPANISH-2006 Security in Telecommunications and Information Technology Study Group 17
ITU-T Q.611-1989 Logic Procedures for Incoming Signalling System No. 4 - Interworking of Signalling Systems (Study Group XI) 4 pp
ITU-T Q.612-1989 Logic Procedures for Incoming Signalling System No. 5 - Interworking of Signalling Systems (Study Group XI) 5 pp
ITU-T Q.613-1989 Logic Procedures for Incoming Signalling System No. 6 - Interworking of Signalling Systems (Study Group XI) 10 pp
ITU-T Q.621-1989 Logic Procedures for Outgoing Signalling System No. 4 - Interworking of Signalling Systems (Study Group XI) 5 pp
ITU-T Q.126-1989 Analysis and Transfer of Digital Information - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp
ITU-T Q.262-1989 4.2 Analysis of Digital Information for Routing - Specifications of Signalling System No. 6 (Study Group XI) 1 pp
ITU-T Q.267-1988 4.7 Unreasonable and Superfluous Messages - Specifications of Signalling System No. 6 (Study Group XI) 4 pp
ITU-R BS.468-4-1986 Measurement of Audio-Frequency Noise Voltage Level in Sound Broadcasting - Section 10C - Audio-Frequency Characteristics of Sound-Broadcasting Signals
ITU-R BS.468-4 SPANISH-1986 MEASUREMENT OF AUDIO-FREQUENCY NOISE VOLTAGE LEVEL IN SOUND BROADCASTING
ITU-R SM.1600-2-2015 Technical identification of digital signals
ITU-R SM.1600-2002 Technical identification of digital signals
ITU-T Q.332-1989 Interworking of Signalling System R1 with Other Standardized Systems - Interworking - Specifications of Signalling Systems R1 and R2 Study Group XI; 1 pp
ITU-T Q.24-1989 Multifrequency Push-Button Signal Reception - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN - Supplements Study Group XI; 3 pp
ITU-T Q.457-1989 Interregister Signalling - Range of Interregister Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 4 pp
ITU-T Q.601-1993 Interworking of Signalling Systems - General - Interworking of Signalling Systems (Study Group XI) 4 pp
ITU-T P.501 AMD 1-2004 Test signals for use in telephonometry Amendment 1: New annexes A and B Study Group 12

German Institute for Standardization, signal to noise ratio

DIN IEC 60883:1989 Measuring method for chrominance signal-to-random noise ratio for video tape recorders; identical with IEC 60883:1987
DIN EN 61290-3-3:2014-11 Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio (IEC 61290-3-3:2013); German version EN 61290-3-3:2014
DIN 33404-3:2016 Danger signals - Auditory danger signals - Part 3: Unified emergency signal
DIN EN 61280-2-9:2009-12 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems (IEC 61280-2-9:2009); German version EN 61280-2-9:2009 / Note: DIN EN 61280-2-...
DIN 33450:2004 Graphical symbol for information about surveillance with optical-electronic devices (video-info signs)
DIN V 66291-1:2000 Chipcards with digital signatur application/function according to SigG and SigV - Part 1: Application interface
DIN EN ISO 7779:2019-04 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2018); German version EN ISO 7779:2018
DIN ETS 300753:1998 Equipment Engineering (EE) - Acoustic noise emitted by telecommunications equipment; English version ETS 300753:1997
DIN 33466:2004 Sign-posts for trails
DIN 49842-1:2006 Lamps for traffic lights - Part 1: Extra low voltage lamps for fixed signal lights
DIN ETS 300753:1998-08 Equipment Engineering (EE) - Acoustic noise emitted by telecommunications equipment; English version ETS 300753:1997
DIN 33404-3:1982 Danger signals for workplaces; auditory danger signals; unified emergency signal; technical requirements of safety, testing
DIN EN 61290-3-3:2014 Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio (IEC 61290-3-3:2013); German version EN 61290-3-3:2014
DIN 67527-1:2001 Photometric properties of signal lights in traffic - Stationary signal lights for road traffic
DIN CLC/TS 50509:2008 Use of LED signal heads in road traffic signal systems; German version CLC/TS 50509:2007
DIN EN ISO 7779:2017 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO/DIS 7779:2017); German and English version prEN ISO 7779:2017

European Committee for Electrotechnical Standardization（CENELEC）, signal to noise ratio

HD 527 S1-1989 Measuring Method for Chrominance Signal-to- Random Noise Ratio for Video Tape Recorders
EN 61290-3-3:2014 Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio
EN 61280-2-9:2009 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
prEN 50XXX Railway Application - Communication, Signalling and processing system - Test requirements for signalling and telecommunication equipment
CLC/TS 50509-2007 Use of LED signal heads in road traffic signal systems
HD 452.1-1984 Analogue Signals for Process Control Systems Part 1: Direct Current Signals
EN 60728-13:2010 Cable networks for television signals, sound signals and interactive services - Part 13: Optical systems for broadcast signal transmissions
prEN 50129 Railway Application - Communication, signalling and processing system - Safety related electronic systems for signalling
EN 60728-13-1:2017 Cable networks for television signals, sound signals and interactive services - Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
EN 60728-3-1:2012 Cable networks for television signals, sound signals and interactive services - Part 3-1: Methods of measurement of non-linearity for full digital channel load with DVB-C signals
CLC/TR 50511:2007 Railway applications - Communications, signalling and processing systems - ERTMS/ETCS - External signalling for lines equipped with ERTMS/ETCS Level 2

CZ-CSN, signal to noise ratio

CSN 35 8586 Cast.5-1988 Camera tubes Methods of measurement of signal-to-noise ratio
CSN 35 8757 Cast.2-1985 Transistors. Measuring method of common-emitter small-signal short-circuit forward current transfer ratio
CSN IEC 816:1994 Guide on methods of measurement of short duration transients on low-voltage power and signal lines
CSN 73 6021-1994 Traffic light signals. Location and use of signal heads
CSN 30 4305-1975 Electric and signal lamps ior motor vehicles
CSN 01 2728-1990 Colour of lights signals for railway traffic
CSN 01 3378-1982 Graphical symbols for signalling technique

ITU-R - International Telecommunication Union/ITU Radiocommunication Sector, signal to noise ratio

REPORT BT.484-2-1986 Ratio of picture-signal to synchronizing-signal
REPORT BS.1058-1986 Minimum AF and RF signal-to-noise ratio required for broadcasting in band 7 (HF)
REPORT BT.2005-1995 Bit-Rate Reduction for Digital TV Signals (4 pp)
ITU-R BT.815-1992 Specification of a Signal for Measurement of the Contrast Ratio of Displays
ITU-R F.240-5-1990 Signal-to-Interference Protection Ratios - Section 3Aa - Technical Characteristics
ITU-R F.339-6-1986 Bandwidths@ Signal-to-Noise Ratios and Fading Allowances in Complete Systems - Section 3Aa - Technical Characteristics
QUESTION 19-1/6-2009 Bit-rate reduction coding of audio signals for broadcasting applications
REPORT SM.2211-2011 Comparison of Time-Difference-of-Arrival and Angle-of-Arrival Methods of Signal Geolocation
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 P.1148-1995 Standardized Procedure for Comparing Predicted and Observed HF Sky-Wave Signal Intensities and the Presentation of Such Comparisons
ITU-R BT.655-6-2000 Radio-Frequency Protection Ratios for AM Vestigial Sideband Terrestrial Television Systems Interfered with by Unwanted Analogue Vision Signals and Their Associated Sound Signals
ITU-R BT.655-5-1998 Radio-Frequency Protection Ratios for AM Vestigial Sideband Terrestrial Television Systems Interferred with by Unwanted Analogue Vision Signals and Their Associated Sound Signals
REPORT BT.1212-1990 Measurements and test signals for digitally encoded colour television signals
ITU-R BT.814-4-2018 Specifications of PLUGE test signals and alignment procedures for setting of brightness and contrast of displays
ITU-R BT.814-3-2017 Specifications of PLUGE test signals and alignment procedures for setting of brightness and contrast of displays
ITU-R V.608-2-1993 Letter Symbols for Telecommunications
ITU-R BT.801-1992 Test Signals for Digitally Encoded Colour Television Signals Conforming with Recommendations 601 and 656

Group Standards of the People's Republic of China, signal to noise ratio

T/GDMA 40-2021 Specification for downloading ripple and symbol timing synchronization under low signal-to-noise ratio conditions

IET - Institution of Engineering and Technology, signal to noise ratio

PHS NOISE SIG SRC-1984 Phase Noise in Signal Sources

International Electrotechnical Commission (IEC), signal to noise ratio

IEC 60883:1987 Measuring method for chrominance signal-to-random noise ratio for video tape recorders
IEC 61290-3-3:2013 Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio
IEC 61280-2-9:2002 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems; Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
IEC 61280-2-9:2009 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
IEC TR 63018:2015 Flexible printed circuit boards (FPCBs) - Method to decrease signal loss by using noise suppression materials
IEC 60728-13:2010/COR1:2010 Corrigendum 1 - Cable networks for television signals, sound signals and interactive services - Part 13: Optical systems for broadcast signal transmissions
IEC TS 62367:2004 Safety aspects for xDSL signals on circuits connected to telecommunication networks (DSL: Digital Subscriber Line)

PL-PKN, signal to noise ratio

PN T04840-10-1989 Camera tubes Method of measurement of Bsignal-tonoise ratio
PN T02031-1992 Test signals and quality parameters of analogue video signal

JP-JEITA, signal to noise ratio

JEITA CP-5110-2007 Methods of Measurement on Carrier-to-Noise Ratio of Receiving Signals for Digital Satellite Broadcast Transmissions

British Standards Institution (BSI), signal to noise ratio

PD IEC/TR 61282-12:2016 Fibre optic communication system design guides. In-band optical signal-to-noise ratio (OSNR)
BS EN 61280-2-9:2009 Fibre optic communication subsystem test procedures — Part 2-9: Digital systems — Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
BS EN 61290-3-3:2014 Optical amplifiers. Test methods. Noise figure parameters. Signal power to total ASE power ratio
DD CLC/TS 50509:2007 Use of LED signal heads in road traffic signal systems
PD IEC/TR 63018:2015 Flexible printed circuit boards (FPCBs). Method to decrease signal loss by using noise suppression materials
BS ISO 9296:2017 Acoustics. Declared noise emission values of information technology and telecommunications equipment
BS EN 60728-13-1:2017 Cable networks for television signals, sound signals and interactive services. Bandwidth expansion for broadcast signal over FTTH system
BS EN 61280-2-9:2003 Fibre optic communication subsystem basic test procedures - Test procedures for digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
BS EN 61280-2-9:2002 Fibre optic communication subsystem basic test procedures - Test procedures for digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
BS 5863-1:1984 Analogue signals for process control systems. Specification for direct current signals
BS EN ISO 7779:2001 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment
BS 5378-2:1980 Safety signs and colours - Specification for colorimetric and photometric properties of materials
BS PD CLC/TR 50083-2-2:2014 Cable networks for television signals, sound signals and interactive services. Interference issues for DVB-T reception in the presence of LTE base station signals
BS ISO/IEC 10118-4:1999 Information technology - Security techniques - Hash-functions - Hash-functions using modular arithmetic
BS DD CLC/TS 50509:2007 Use of LED signal heads in road traffic signal systems
DD CLC/TS 50509-2007 Use of LED signal heads in road traffic signal systems
BS 5863-2:1980 Analogue signals for process control systems. Specification for direct voltage signals
BS EN 60728-1-2:2010 Cable networks for television signals, sound signals and interactive services. Performance requirements for signals delivered at the system outlet in operation
BS EN 60728-1-2:2009 Cable networks for television signals, sound signals and interactive services - Performance requirements for signals delivered at the system outlet in operation
BS EN 60728-1-2:2014 Cable networks for television signals, sound signals and interactive services. Performance requirements for signals delivered at the system outlet in operation
PD CLC/TR 50083-2-2:2014 Cable networks for television signals, sound signals and interactive services. Interference issues for DVB-T reception in the presence of LTE base station signals
PD CLC/TR 50511:2007 Railway applications. Communications, signalling and processing systems. ERTMS/ETCS. External signalling for lines equipped with ERTMS/ETCS Level 2
BS ISO 17398:2004 Safety colours and safety signs - Classification, performance and durability of safety signs
BS EN IEC 60728-11:2023 Cable networks for television signals, sound signals and interactive services. Safety
BS EN ISO 7779:2018 Tracked Changes. Acoustics. Measurement of airborne noise emitted by information technology and telecommunications equipment
BS 1376:1974 Specification for colours of light signals

American National Standards Institute （ANSI), signal to noise ratio

ANSI/TIA/EIA 526-19-2000 Optical Signal-to-Noise Ratio Measurement Procedures for Dense Wavelength-Division Multiplexed Systems
ANSI S3.42-1992 Testing Hearing Aids with a Broad-Band Noise Signal
ANSI/ASA S3.42-1-1992 Testing Hearing Aids with a Broad-Band Noise Signal
ANSI/SCTE 121-2011 Test Method for Downstream Bit Error Rate
ANSI/ASA S12.10-2002*ISO 7779:1999 Acoustics - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment
ANSI S12.10-2002 Acoustics - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment
ANSI/ASA S12.10-2-2011 Acoustics - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment - Part 2: Declaration of Noise Emission Levels
ANSI/INCITS TR 33-2003 INCITS Technical Report for Information Technology Fibre Channel Signal Modeling (FCSM)
ANSI/ATIS 1000660-1998 Telecommunications - Signalling System Number 7 (SS7) - Call Completion to a Portable Number - Integrated Text
ANSI/TIA-455-236-2004 FOTP236 - IEC 61280-2-9 - Fibre Optic Communication Subsystem Test Procedures - Part 2-6: Digital Systems - Optical Signal-to-Noise Ratio Measurement for Dense Wavelength-Division Multiplexed Systems
ANSI/ASTM F957:1991 Specification for Gong, Sound Signaling

NEMA - National Electrical Manufacturers Association, signal to noise ratio

NEMA MS 1-1994 Determination of Signal-to-Noise Ratio (SNR) in Diagnostic Magnetic Resonance Images
NEMA MS 1-1988 Determination of Signal- to-Noise Ratio (SNR) in Diagnostic Magnetic Resonance Images

ES-UNE, signal to noise ratio

UNE 135213:2018 Road signalization equipment. Horizontal signalization. Paints. Contrast ratio of the dried film.
UNE-EN 61290-3-3:2014 Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio (Endorsed by AENOR in March of 2014.)
UNE-EN 61280-2-9:2009 Fibre optic communication subsystem test procedures -- Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems (Endorsed by AENOR in July of 2009.)
UNE-EN ISO 7779:2021 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2018)
UNE-EN 50129:2020 Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling
UNE-EN 60728-13-1:2017 Cable networks for television signals, sound signals and interactive services - Part 13-1: Bandwidth expansion for broadcast signal over FTTH system (Endorsed by Asociación Española de Normalización in December of 2017.)
UNE-EN 60728-13:2010 Cable networks for television signals, sound signals and interactive services - Part 13: Optical systems for broadcast signal transmissions

Professional Standard - Electron, signal to noise ratio

SJ/T 10238-1991 Noise signal generators for Type XZ-8
SJ 438-1973 Method of measurement for spurious oscillations signal-to-noise ratio of O-type backwave tubes

YU-JUS, signal to noise ratio

JUS N.N6.180-1978 Radio Communications. Wired distribution sistems. Methods of measurements. RF signal to noise ratio. Correction factors.
JUS N.N6.181-1978 Radiocommunications. Wired distribution systems. Methods of measurements. Television RF signal to noise ratio. Equipment reguired-additional items.
JUS N.N6.182-1978 Radiocommunications. Wired distribution systems. Methods of measurements. Television RF signal to noise ratio. Checks on the measuring eguipment.
JUS N.N6.183-1978 Radio Communications. Wire? distribution systems. Methods ofmeasurements. RF signal to noise ratio. Calibration ofthe selective voltmeter
JUS Z.S2.324-2004 Road signs Information signs Label selection on direction signalling signs
JUS Z.S2.302-1983 Road sings. Sings regulating priority at intersections danger vvaming sings at approaches to intersections and design ofsigns
JUS N.N6.184-1978 Radioeommunications. Wired distribution svstems. Methods of measurements. Television RF signal to intermodulation ratio. Test signals, levels and intermodulation products.

ITU-T - International Telecommunication Union/ITU Telcommunication Sector, signal to noise ratio

ITU-T J.62-1978 SINGLE VALUE OF THE SIGNAL-TO-NOISE RATIO FOR ALL TELEVISION SYSTEMS (Study Group CMTT)
ITU-T H.263-1996 Video Coding for Low Bit Rate Communication - Transmission of Non-Telephone Signals (Study Group 15) 51 pp
ITU-T Q.151-1989 Signal Code for Register Signalling - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 2 pp
ITU-T H.13-1989 Characteristics of an Impulsive Noise Measuring Instrument for Telephone-Type Circuits - Line Transmission of Non-Telephone Signals - Transmission of Sound-Programme and Television Signals (Study Group XV) 1 pp
ITU-T Q.762-1993 General Function of Messages and Signals of the ISDN User Part of Signalling System No. 7 - Specifications of Signalling System No. 7 (Study Group XI) 17 pp
ITU-T Q.141-1989 Signal Code for Line Signalling - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp
ITU-T J.63-1989 Insertion of Test Signals in the Field-Blanking Interval of Monochrome and Colour Television Signals - Line Transmission of Non-Telephone Signals - Transmission of Sound-Programme and Television Signals (Study Group XV; 1 pp)

Lithuanian Standards Office , signal to noise ratio

LST HD 527 S1-2002 Measuring method for chrominance signal-to-random noise ratio for video tape recorders (IEC 60883:1987)
LST EN 61280-2-9-2009 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems (IEC 61280-2-9:2009)
LST EN 300 753 V1.3.1-2012 Environmen tal Engineering (EE); Acoustic noise emitted by telecommunications equipment
LST EN 300 753 V1.2.1-2009 Equipment Engineering (EE); Acoustic noise emitted by telecommunications equipment
LST ETS 300 753 Leid.1-2006 Equipment Engineering (EE);Acoustic noise emitted by telecommunications equipment
LST ETS 300 230 Leid.2-2006 Radio Equipment and Systems (RES);Land mobile service;Binary Interchange of Information and Signalling (BIIS) at 1 200 bit/s (BIIS 1 200)
LST EN ISO 7779:2010 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)
LST EN 60728-13-2010 Cable networks for television signals, sound signals and interactive services - Part 13: Optical systems for broadcast signal transmissions (IEC 60728-13:2010)

National Metrological Technical Specifications of the People's Republic of China, signal to noise ratio

JJF 1533-2015 Calibration Specification for White Gaussian Noise Generators

Acoustical Society of America (ASA), signal to noise ratio

ASA S3.42-1992 Testing Hearing Aids with a Broad-Band Noise Signal
ASA S12.10 PART 2-2011 American National Standard Acoustics - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment - Part 2: Declaration of Noise Emission Levels
ASA S12.10-2002 Acoustics ?Measurement of airborne noise emitted by information technology and telecommunications equipment

SAE - SAE International, signal to noise ratio

SAE J2949-2015 H-III50M Ankle Update to Eliminate Signal Noise
SAE J2539-2019 Comparison of GATS Messages to SAE ATIS Standards

Japanese Industrial Standards Committee (JISC), signal to noise ratio

JIS C 61280-2-9:2010 Fiber optic communication subsystem test procedures -- Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
JIS C 6122-3-3:2016 Optical amplifiers -- Test methods -- Part 3-3: Noise figure parameters -- Signal power to total ASE power ratio
JIS S 0014:2003 Guidelines for the elderly and people with disabilities -- Auditory signals on consumer products -- Sound pressure levels of signals for the elderly and in noisy conditions
JIS X 5054:1996 Information technology -- Security techniques -- Digital signature scheme giving message recovery
JIS E 3012:1988 Graphical symbols for railway signaling
JIS E 3011:2022 Lettered symbols for railway signalling
JIS X 7779:2001 Acoustics -- Measurement of airborne noise emitted by information technology and telecommunications equipment
JIS X 7779:2012 Acoustics -- Measurement of airborne noise emitted by information technology and telecommunications equipment

IEC - International Electrotechnical Commission, signal to noise ratio

IEC TR 61282-12:2016 Fibre optic communication system design guides – Part 12: In-band optical signal-to-noise ratio (OSNR) (Edition 1.0)

Association Francaise de Normalisation, signal to noise ratio

NF C93-805-3-3*NF EN 61290-3-3:2014 Optical amplifiers - Test methods - Part 3-3 : noise figure parameters - Signal power to total ASE power ratio
NF EN 61290-3-3:2014 Amplificateurs optiques - Méthodes d'essais - Partie 3-3 : paramètres du facteur de bruit - Rapport puissance du signal sur puissance totale d'ESA
NF X06-903:1992 Random signal terminology-Transformation of signal
NF EN 61280-2-9:2009 Procédures d'essai des sous-systèmes de télécommunications à fibres optiques - Partie 2-9 : systèmes numériques - Mesure du rapport signal sur bruit optique pour les systèmes multiplexés à répartition en longueur d'onde dense
NF F14-003:1989 Rolling stock. Flag bracket. Removable signalling.
NF F14-401:1980 Railway transport equipment. Signalling equipment for rail vehicles. Removable signalling. Flag bracket and signal bracket.
NF ISO 9296:2017 Acoustique - Valeurs déclarées d'émission acoustique des équipements liés aux technologies de l'information et aux télécommunications
NF X06-904:1992 Vocabulary of random signals-Spectral analysis of continuous signals
NF X35-118*NF EN 981+A1:2008 Safety of machinery - System of auditory and visual danger and information signals
NF X35-118:1997 Safety of machinery. System of auditory and visual danger and information signals.
NF C15-150-1F1:2002
NF S31-112*NF ISO 9296:2017 Acoustics - Declared noise emission values of information technology and telecommunications equipment
NF S31-072*NF EN ISO 7779:2018 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment
NF EN ISO 7779:2018 Acoustique - Mesurage du bruit aérien émis par les équipements liés aux technologies de l'information et aux télécommunications
NF C93-807-2-9*NF EN 61280-2-9:2009 Fibre optic communication subsystem test procedures - Part 2-9 : digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems.
NF C90-101-13*NF EN 60728-13:2010 Cable networks for television signals, sound signals and interactive services - Part 13 : optical systems for broadcast signal transmissions
NF F74-129*NF EN 50129:2018 Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling
NF S31-072:2010 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment.
NF C90-101-13-1*NF EN 60728-13-1:2017 Cable networks for television signals, sound signals and interactive services - Part 13-1 : bandwidth expansion for broadcast signal over FTTH system
NF C90-101-115*NF EN IEC 60728-115:2022 Cable networks for television signals, sound signals and interactive services - Part 115 : in-building optical systems for broadcast signal transmissions
NF Z87-753*NF EN 300753:2012 Equipment Engineering (EE) - Acoustic noise emitted by telecommunications equipment (V1.3.1)
NF EN 300753:2012 Ingénierie de l'environnement (EE) - Bruit acoustique émis par les équipements de télécommunication (V1.3.1)
XP P 98-520-1997 ROAD TRAFFIC SIGNS. DECORS FOR TRAFFIC SIGNS. PERFORMANCES, TECHNICAL CHARACTERISTICS AND SPECIFICATIONS.

IEEE - The Institute of Electrical and Electronics Engineers@ Inc., signal to noise ratio

IEEE 618-1984 STANDARD FOR MEASUREMENT OF LUMINANCE SIGNAL-TO- NOISE RATIO IN VIDEO MAGNETIC-TAPE RECORDING SYSTEMS

National Metrological Verification Regulations of the People's Republic of China, signal to noise ratio

JJG(电子) 15013-1991 Verification Regulations for UZ-3 White Noise Signal Generator

International Organization for Standardization (ISO), signal to noise ratio

ISO 8687:1987 Cinematography; Signal-to-noise ratio of 8 mm Type S, 16 mm and 35 mm variable-area photographic sound records; Method of measurement
ISO/TR 9819:1991 Road vehicles; comparison tables of regulations on photometric requirements of light signalling devices
ISO 9296:2017 Acoustics — Declared noise emission values of information technology and telecommunications equipment
ISO/CIE 16508:1999 Road traffic lights - Photometric properties of 200 mm roundel signals
ISO 7779:2018 Acoustics — Measurement of airborne noise emitted by information technology and telecommunications equipment
ISO 7779:2010 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment

ATIS - Alliance for Telecommunications Industry Solutions, signal to noise ratio

T1.TR.74-2001 Objective Video Quality Measurement Using a Peak- Signal-to-Noise-Ratio (PSNR) Full Reference Technique

Korean Agency for Technology and Standards (KATS), signal to noise ratio

KS C IEC 61280-2-9:2003 Fiber optic communication subsystem test procedures－Part 2－9：Digital systems－Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
KS A ISO 8687:2003 Cinematography－Signal－to－noise ratio of 8 mm type S, 16 mm and 35 mm variable－area photographic sound records－Method of measurement
KS A ISO 11429:2008 Ergonomics-System of auditory and visual danger and information signals
KS R 9183-2003(2018) Lettered symbols for railway signaling
KS C 7010-1971(2000) TYPE DESIGNATION SYSTEM FOR RECEIVING TUBES
KS C 7010-1985 TYPE DESIGNATION SYSTEM FOR RECEIVING TUBES
KS C IEC 61280-2-9-2003(2018)
KS I ISO 7779:2017 Acoustics－Measurement of airborne noise emitted by information technology and telecommunications equipment
KS X ISO/IEC 21889-2003(2018)
KS I ISO 7779:2002 Acoustics-Measurement of airborne noise emitted by information technology and telecommunications equipment
KS A ISO 8687-2003(2018) Cinematography - Signal-to-noise ratio of 8mm type S, 16mm and 35mm variable-area photographic Sound records - Method of measurement

Society of Motion Picture and Television Engineers (SMPTE), signal to noise ratio

SMPTE 211M-2001 Motion-Picture Film - 16- and 35-mm Variable-Area Photographic Audio Records - Signal-to-Noise Ratio
SMPTE ST 2022-6-2012 Transport of High Bit Rate Media Signals over IP Networks (HBRMT)
SMPTE RDD 19-2011 Television - Guidelines on the Use of Dolby E with Video Signals at Frame Rates Greater than 30 Hz
SMPTE ST 2022-5-2013 Forward Error Correction for Transport of High Bit Rate Media Signals over IP Networks (HBRMT)
SMPTE ST 211M-2001 Motion-Picture Film - 16- and 35-mm Variable-Area Photographic Audio Records - Signal-to-Noise Ratio
SMPTE ST 2095-1-2015 Calibration Reference Wideband Digital Pink Noise Signal (Includes Access to Additional Content)
SMPTE 267M-1995 Television - Bit-Parallel Digital Interface - Component Video Signal 4:2:2 16x9 Aspect Ratio

European Telecommunications Standards Institute (ETSI), signal to noise ratio

ETSI TR 103 053-2014 Fixed Radio Systems; Parameters affecting the Signal-to-Noise Ratio (SNR) and the Receiver Signal Level (RSL) threshold in point-to-point receivers; Theory and practice (V1.1.1; Includes Diskette)
ETSI ETS 300 753-1997 Equipment Engineering (EE); Acoustic Noise Emitted by Telecommunications Equipment

ETSI - European Telecommunications Standards Institute, signal to noise ratio

TR 103 053-2014 Fixed Radio Systems; Parameters affecting the Signal-to-Noise Ratio (SNR) and the Receiver Signal Level (RSL) threshold in point-to-point receivers; Theory and practice (V1.1.1; Includes Diskette)
GSM 06.12-1992 Comfort Noise Aspects for Full-Rate Speech Traffic Channels
PRI-ETS 300 230-1992 Radio Equipment and Systems (RES); Land Mobile Service Binary Interchange of Information and Signalling at 1200 Bit/s (BIIS 1200)
PRETS 300 753-1996 Equipment Engineering (EE); Acoustic Noise Emitted by Telecommunications Equipment
PRETS 300 753-1997 Equipment Engineering (EE); Acoustic Noise Emitted by Telecommunications Equipment
ETS 300 753-1997 Equipment Engineering (EE); Acoustic Noise Emitted by Telecommunications Equipment
ETSI EN 300 753:2012 Environmental Engineering (EE); Acoustic noise emitted by telecommunications equipment (V1.3.1)
ETSI EN 300 753:2011 Equipment Engineering (EE); Acoustic noise emitted by telecommunications equipment (V1.3.1)
ETSI EN 300 753:2009 Equipment Engineering (EE); Acoustic noise emitted by telecommunications equipment (V1.2.1)

CEPT - Conference Europeenne des Administrations des Postes et des Telecommunications, signal to noise ratio

CEPT T/CS 46-03-1985 Signalisation Pour Poste A Clavier Combinant Les Signaux Multifrequences De Base Et Une Signalisation Par Courant Continu
CEPT T/CS 42-03-1985 Signalisation De Ligne Du Systeme De Signalisation R2@ Version Numerique
CEPT T/CS 41-01 E-1982 Signal and Signalling Message Names and Meanings

(U.S.) Telecommunications Industries Association , signal to noise ratio

TIA/EIA-526-19-2000 OFSTP-19 Optical Signal-to-Noise Ratio Measurement Procedures for Dense Wavelength-Division Multiplexed Systems
TIA-455-236-2004 FOTP-236 IEC 61280-2-9 - Fibre Optic Communication Subsystem Test Procedures - Digital Systems - Part 2-9: Optical Signal-to-Noise Ratio Measurement for Dense Wave-Length Multiplexed Systems

Professional Standard - Railway, signal to noise ratio

TB/T 1121-1998 Numbering principle of communication signal enterprise standard
TB/T 1424-1982 Temperature rise of communication signal products
TB/T 1448-1982 Insulation withstand voltage of communication signal products
TB/T 1120-2000 Numbering principles for communication signal product drawings and technical documents
TB/T 1433.1-2019 Environmental conditions for railway communication signaling products Part 1: Signaling products for ground fixed use

IT-UNI, signal to noise ratio

UNI 7543-P2-1976

(U.S.) Joint Electron Device Engineering Council Soild State Technology Association, signal to noise ratio

JEDEC EIA-371-1970 Measurement of Small-Signal VHF-UHF Transistor Short-Circuit Forward Current Transfer Ratio

Danish Standards Foundation, signal to noise ratio

DS/EN 61280-2-9:2009 Fibre optic communication subsystem test procedures - Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
DS/CLC/TS 50509:2008 Use of LED signal heads in road traffic signal systems
DS/EN ISO 7779:2010 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment
DS/EN 60728-13:2010 Cable networks for television signals, sound signals and interactive services - Part 13: Optical systems for broadcast signal transmissions
DS/EN 50129:2004 Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling
DS/EN 300753 V1.3.1:2012 Environmental Engineering (EE); Acoustic noise emitted by telecommunications equipment
DS/ETS 300753:1998 Equipment Engineering (EE) - Acoustic noise emitted by telecommunications equipment
DS/EN 300753 V1.2.1:2009 Equipment Engineering (EE);Acoustic noise emitted by telecommunications equipment
DS/EN 60728-13-1/AC:2013 Cable networks for television signals, sound signals and interactive services - Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
DS/EN 60728-13-1:2012 Cable networks for television signals, sound signals and interactive services - Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
DS/EN 60728-3-1:2012 Cable networks for television signals, sound signals and interactive services - Part 3-1: Methods of measurement of non-linearity for full digital channel load with DVB-C signals
DS/CLC/TR 50511:2008 Railway applications - Communications, signalling and processing systems - ERTMS/ETCS - External signalling for lines equipped with ERTMS/ETCS Level 2
DS/EN 301171 V1.1.1:1999 Video coding for low bit rate communication

CENELEC - European Committee for Electrotechnical Standardization, signal to noise ratio

EN 61280-2-9:2002 Fibre optic communication subsystem test produres Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
EN 61175:1993 Designations for Signals and Connections

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, signal to noise ratio

GB/T 16679-1996 Designations for signals and connections
GB 1251.1-1989 Danger signals for work places--Auditory danger signals
GB/T 14431-1993 Protection ratios and minimum usable field strengths required in the radio services
GB/T 20149-2006 Road traffic lights.Photometric properties of 200 mm roundel signals
GB/T 18119-2000 Video coding for low bit rate communication
GB/T 18313-2001 Acoustics--Measurement of airborne noise emitted by information technology and telecommunications equipment
GB/T 17148-1997 A conventional test slgnal simulating sound--Programme signals for measuring interference in other channels
GB/T 18698-2002 Acoustics--Declared noise emission values of information technology and telecommunications equipment
GB/T 14733.5-1993 Terminology for telecommunications. Discrete signals,telegraphy,facsimile and data communication

RO-ASRO, signal to noise ratio

STAS 11200/115-1978 GRAPHICAL SYMBOL FOR SIGNAL LAMP
STAS 11200/515-1979 GRAPHICAL SYMBOL FOR TURN SIGNAL
STAS 11200/5256-1989 GRAPHICAL SYMBOL FOR SIGNALLING SENDER
STAS 11200/5257-1989 GRAPHICAL SYMBOL FOR SIGNALLING RECEIVER
STAS 11200/5315-1989 Graphical symbols GRAPHICAL SYMBOL FOR SIGNAL WITH TWO LEVELS
STAS 11200/5316-1989 Graphical symbols GRAPHICAL SYMBOL FOR SIGNAL WITH THREE LEVELS

KR-KS, signal to noise ratio

KS A ISO 8687-2003(2023) Cinematography - Signal-to-noise ratio of 8mm type S, 16mm and 35mm variable-area photographic Sound records - Method of measurement
KS I ISO 7779-2017 Acoustics－Measurement of airborne noise emitted by information technology and telecommunications equipment

BE-NBN, signal to noise ratio

NBN-ISO 7731:1992 Danger signais for work places - Auditory danger signais

HU-MSZT, signal to noise ratio

IX-ECMA, signal to noise ratio

ECMA-109-2020 Declared Noise Emission Values of Information Technology and Telecommunications Equipment
ECMA 109-2012 Declared Noise Emission Values of Information Technology and Telecommunications Equipment (6th Edition)
ECMA 74-2008 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment 10th Edition
ECMA 108-2008 Measurement of Highfrequency Noise emitted by Information Technology and Telecommunications Equipment 4th Edition
ECMA 74-2012 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment 12th Edition
ECMA 74-2010 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment 11th Edition
ECMA 109-2010 Declared Noise Emission Values of Information Technology and Telecommunications Equipment 5th Edition
ECMA 74-2015 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (13th Edition)
ECMA 108-2010 Measurement of High-frequency Noise emitted by Information Technology and Telecommunications Equipment (5th Edition)

Standard Association of Australia （SAA）, signal to noise ratio

AS ISO 9296:2019 Acoustics — Declared noise emission values of information technology and telecommunications equipment

FI-SFS, signal to noise ratio

SFS 5224-1986
SFS 8224-1985 In case of interpretation disputes the Finnish text applies
SFS 4017-1977

Aeronautical Radio Inc., signal to noise ratio

ARINC 407-1 PART 5 Recommended Practice on Signal Polarities for Condition and Command Signals
ARINC 619-1 ITEM 5.0 General Bit-Oriented Communications Protocol

Institute of Electrical and Electronics Engineers (IEEE), signal to noise ratio

ST 2095-1:2015 ST 2095-1:2015 - SMPTE Standard - Calibration Reference Wideband Digital Pink Noise Signal
SMPTE ST 2022-6:2012 ST 2022-6:2012 - SMPTE Standard - Transport of High Bit Rate Media Signals over IP Networks (HBRMT)
ST 2022-6:2012 ST 2022-6:2012 - SMPTE Standard - Transport of High Bit Rate Media Signals over IP Networks (HBRMT)

United States Navy, signal to noise ratio

NAVY MIL-M-18371 E NOTICE 1-1997 MIRRORS, EMERGENCY SIGNALING, MARK 3
NAVY MIL-M-18371 E (2)-1979 MIRRORS, EMERGENCY SIGNALING, MARK 3
NAVY MIL-M-18371 E-1969 MIRRORS, EMERGENCY SIGNALING, MARK 3

European Committee for Standardization (CEN), signal to noise ratio

prEN 61175-1992 Designations for signals and connections
HD 452.1 S1-1984 Analogue signals for process control systems; part 1: direct current signals

AREMA - American Railway Engineering and Maintenance-of-Way Association, signal to noise ratio

C&S MANUAL-2002 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2006 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2005 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2004 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2007 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2009 Communications & Signals Manual of Recommended Practice
C&S MANUAL-2008 Communications & Signals Manual of Recommended Practice

未注明发布机构, signal to noise ratio

DIN EN ISO 7779:2002 Acoustics — Measurement of airborne noise emitted by information technology and telecommunications equipment
BS EN 50129:2018(2019) Railway applications – Communication, signalling and processing systems – Safety related electronic systems for signalling

AT-ON, signal to noise ratio

ONORM V 2011-1984 Signals for traffic-light installations; Colours and colour-limits for light-signals

U.S. Air Force, signal to noise ratio

AIR FORCE MIL-S-38449 C NOTICE 3-1996 SIGNAL AND SIGNAL/INTERCOMMUNICATION AMPLIFIERS, UNIVERSAL, AERIAL REFUELING
AIR FORCE MIL-S-38449 C REINST NOTICE 2-1989 SIGNAL AND SIGNAL/INTERCOMMUNICATION AMPLIFIERS, UNIVERSAL, AERIAL REFUELING
AIR FORCE MIL-S-38449 C-1976 SIGNAL AND SIGNAL/INTERCOMMUNICATION AMPLIFIERS, UNIVERSAL, AERIAL REFUELING

Society of Automotive Engineers (SAE), signal to noise ratio

SAE J2539-2002 Comparison of GATS Messages to SAE ATIS Standards

ECMA - European Association for Standardizing Information and Communication Systems, signal to noise ratio

109-1996 Declared Noise Emission Values of Information Technology and Telecommunications Equipment (4th Edition)
109-2010 Declared Noise Emission Values of Information Technology and Telecommunications Equipment (5th Edition)
109-2012 Declared Noise Emission Values of Information Technology and Telecommunications Equipment (6th Edition)
74-2017 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (14th Edition)
108-2008 Measurement of Highfrequency Noise emitted by Information Technology and Telecommunications Equipment (4th Edition)
108-2010 Measurement of High-frequency Noise emitted by Information Technology and Telecommunications Equipment (5th Edition)
74-2012 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (12th Edition)
108-1996 Measurement of High-frequency Noise emitted by Information Technology and Telecommunications Equipment (3rd Edition)
74-2003 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (8th Edition)
74-1997 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (5th Edition)
74-2005 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (9th Edition)
74-1999 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (6th Edition)
74-2018 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (15th Edition)
74-2010 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (11th Edition)
74-2015 Measurement of Airborne Noise emitted by Information Technology and Telecommunications Equipment (13th Edition)
74-2008 Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (10th Edition)

International Commission on Illumination (CIE), signal to noise ratio

CIE S 004/E-2001 Colours of Light Signals

国家铁路局, signal to noise ratio

TB/T 1448-2018 Insulation withstand voltage of railway communication signal products

Indonesia Standards, signal to noise ratio

SNI 10-4836-1998 Character of signal light rhythm for marine navigation

U.S. Military Regulations and Norms, signal to noise ratio

ARMY MIL-T-13559 B NOTICE 1-1996 TARGET, EQUIPMENT
ARMY MIL-T-13559 B-1973 TARGET, EQUIPMENT

North Atlantic Treaty Organization Standards Agency, signal to noise ratio

STANAG 3379-2007 IN-FLIGHT VISUAL SIGNALS

Underwriters Laboratories (UL), signal to noise ratio

UL 464A-2016 UL Standard for Safety Audible Signal Appliances for General Signaling Use (First Edition)
UL 1638A-2016 UL Standard for Safety Visual Signal Appliances for General Signaling Use (First Edition)

AR-IRAM, signal to noise ratio

IRAM-4002 P.-1948

ES-AENOR, signal to noise ratio

UNE 1-092-1984
UNE 73-302-1991 Ionizing radiation symbols