How to distinguish low frequency area, intermediate frequency area and high frequency area

How to distinguish low frequency area, intermediate frequency area and high frequency area, Total:76 items.

The international standard classification for "How to distinguish low frequency area, intermediate frequency area and high frequency area" includes: .

The Chinese standard classification for "How to distinguish low frequency area, intermediate frequency area and high frequency area" includes: Traction substation .

Xizang Provincial Standard of the People's Republic of China

DB54/T 0289-2023 Technical requirements for security video surveillance equipment in plateau areas
DB54/T 0291-2023 Architectural requirements for smart video systems in plateau areas

未注明发布机构

DIN 45680 E:2013-09 Measurement and assessment of low-frequency noise immissions in the neighbourhood
DIN 45680 E:2011-08 Measurement and assessment of low-frequency noise immissions in the neighbourhood

Shaanxi Provincial Standard of the People's Republic of China

DB61/T 981-2015 Technical Requirements for Video Surveillance System in Expressway Service Area

Professional Standard - Railway

TB/T 2501-1994 Audio Insulating Transformer Used in Electrization Section
TB/T 2501-1994/XG1-2002 Audio isolation transformers for electrified sections

Anhui Provincial Standard of the People's Republic of China

DB34/T 3349-2019 Specifications for video surveillance data storage in mountain scenic spots

Guizhou Provincial Standard of the People's Republic of China

DB52/T 1600-2021 Public area video image data collection requirements

International Telecommunication Union (ITU)

ITU-R RRC.3 FRENCH-1976 Final acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975
ITU-R RRC.3-1976 Final acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975
ITU-R RRC.3 SPANISH-1976 Final acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975
ITU-R BS.598-1-1990 Factors Influencing the Limits of Amplitude-Modulation Sound-Broadcasting Coverage in Band 6 (MF) - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R BS.598-1 FRENCH-1990 Factors Influencing the Limits of Amplitude-Modulation Sound-Broadcasting Coverage in Band 6 (MF) - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R BS.598-1 SPANISH-1990 FACTORS INFLUENCING THE LIMITS OF AMPLITUDE-MODULATION SOUND-BROADCASTING COVERAGE IN BAND 6 (MF)
ITU-R BS.560-4-1997 Radio-Frequency Protection Ratios in LF MF and HF Broadcasting
ITU-R M.1456-2000 Minimum Performance Characteristics and Operational Conditions for High Altitude Platform Stations Providing IMT-2000 in the Bands 1 885-1 980 MHz 2 010-2 025 MHz and 2 110-2 170 MHz in Regions 1 and 3 and 1 885-1 980 MHz and 2 110-2 160 MHz in Region 2
ITU-R QUESTION 1046-1999 Sharing criteria for BSS networks in the 17.3-17.8 GHz band in Region 2, and in the 21.4-22 GHz band in Regions 1 and 3, and their associated feeder links
ITU-R BS.561-2-1986 Definitions of Radiation in LF MF and HF Broadcasting Bands - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R P.1812-3-2013 A path-specific propagation prediction method for point-to-area terrestrial services in the VHF and UHF bands
ITU-R QUESTION 51/6-2000 Sky-wave reception in LF MF and HF broadcasting
ITU-R BS.560-4 SPANISH-1997 Radio-frequency protection ratios in LF, MF and HF broadcasting
ITU-R SM.1049-1 SPANISH-1995 A METHOD OF SPECTRUM MANAGEMENT TO BE USED FOR AIDING FREQUENCY ASSIGNMENT FOR TERRESTRIAL SERVICES IN BORDER AREAS
ITU-R BS.560-4 FRENCH-1997 Radio-frequency protection ratios in LF, MF and HF broadcasting
ITU-R M.1456 SPANISH-2000 Minimum Performance Characteristics and Operational Conditions for High Altitude Platform Stations Providing IMT-2000 in the Bands 1 885-1 980 MHz 2 010-2 025 MHz and 2 110-2 170 MHz in Regions 1 and 3 and 1 885-1 980 MHz and 2 110-2 160 MHz in Region 2
ITU-R BS.559-1990 Objective measurement of radio-frequency protection ratios in LF, MF and HF broadcasting
ITU-R BS.559-2-1990 Objective Measurement of Radio-Frequency Protection Ratios in LF MF and HF Broadcasting - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R M.1456 FRENCH-2000 MINIMUM PERFORMANCE CHARACTERISTICS AND OPERATIONAL CONDITIONS FOR HIGH ALTITUDE PLATFORM STATIONS PROVIDING IMT-2000 IN THE BANDS 1 885-1 980 MHz, 2 010-2 025 MHz AND 2 110-2 170 MHz IN REGIONS 1 AND 3 AND 1 885-1 980 MHz AND 2 110-2 160 MHz IN REGION 2
ITU-R BS.639-1986 Necessary Bandwidth of Emission in LF MF and HF Broadcasting - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R BS.561-2 SPANISH-1986 DEFINITIONS OF RADIATION IN LF, MF AND HF BROADCASTING BANDS
ITU-R BS.561-2 FRENCH-1986 DEFINITIONS OF RADIATION IN LF, MF AND HF BROADCASTING BANDS
ITU-R M.1178-1995 Use of the Maritime Radionavigation Band (283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3)
ITU-R BS.559-2 SPANISH-1990 OBJECTIVE MEASUREMENT OF RADIO-FREQUENCY PROTECTION RATIOS IN LF, MF AND HF BROADCASTING
ITU-R BS.639 SPANISH-1986 Necessary bandwidth of emission in LF, MF and HF broadcasting
ITU-R QUESTION 1086-2003 Digital sound broadcasting in band 7 (HF) in the Tropical Zone
ITU-R BS.559-2 FRENCH-1990 OBJECTIVE MEASUREMENT OF RADIO-FREQUENCY PROTECTION RATIOS IN LF, MF AND HF BROADCASTING
ITU-R BS.639 FRENCH-1986 Necessary Bandwidth of Emission in LF MF and HF Broadcasting - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R M.1178 SPANISH-1995 Use of the Maritime Radionavigation Band (283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3)
ITU-R RA.479-5-2003 Protection of frequencies for radioastronomical measurements in the shielded zone of the Moon
ITU-R REPORT BS.458-5-1990 Characteristics of systems in LF, MF and HF broadcasting
ITU-R M.1178 FRENCH-1995 USE OF THE MARITIME RADIONAVIGATION BAND (283.5-315 kHz IN REGION 1 AND 285-325 kHz IN REGIONS 2 AND 3)
ITU-R BS.498-2-1990 Ionospheric Cross-Modulation in the LF and MF Broadcasting Bands - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R BS.48-1986 Choice of frequency for sound broadcasting in the Tropical Zone
ITU-R INFORME BS.458-5 SPANISH-1990 Characteristics of systems in LF, MF and HF broadcasting
ITU-R SM.1049-1-1995 Method of Spectrum Management to Be Used for Aiding Frequency Assignment for Terrestrial Services in Border Areas
ITU-R BO.1776-1-2012 Maximum power flux-density for the broadcasting-satellite service in the band 21.4-22.0 GHz in Regions 1 and 3
ITU-R BS.48-2 SPANISH-1986 Choice of frequency for sound broadcasting in the Tropical Zone
ITU-R BS.48-2 FRENCH-1986 Choice of frequency for sound broadcasting in the Tropical Zone
ITU-R SM.1049-1995 A method of spectrum management to be used for aiding frequency assignment for terrestrial services in border areas
ITU-R BS.597-1 SPANISH-1986 CHANNEL SPACING FOR SOUND BROADCASTING IN BAND 7 (HF)
ITU-R BS.498-2 SPANISH-1990 IONOSPHERIC CROSS-MODULATION IN THE LF AND MF BROADCASTING BANDS
ITU-R BO.1776-2012 Maximum power flux-density for the broadcasting-satellite service in the band 21.4-22.0 GHz in Regions 1 and 3
ITU-R RRC.5-1984 Final acts of the Regional Administrative Conference for the Planning of VHF Sound Broadcasting (Region 1 and Part of Region 3) Geneva 1984
ITU-R BS.498-2 FRENCH-1990 IONOSPHERIC CROSS-MODULATION IN THE LF AND MF BROADCASTING BANDS
ITU-R BS.597-1 FRENCH-1986 Channel Spacing for Sound Broadcasting in Band 7 (HF) - Section 10A-1 - Amplitude-Modulation Sound Broadcasting in Bands 5 (LF) 6 (MF) and 7 (HF)
ITU-R RRC.5 SPANISH-1984 Final acts of the Regional Administrative Conference for the Planning of VHF Sound Broadcasting (Region 1 and Part of Region 3) Geneva 1984
ITU-R REPORT SM.2158-2-2011 Impact of power line telecommunication systems on radiocommunication systems operating in the LF, MF, HF and VHF bands below 80 MHz
ITU-R RRC.5 FRENCH-1984 Final acts of the Regional Administrative Conference for the Planning of VHF Sound Broadcasting (Region 1 and Part of Region 3) Geneva 1984
ITU-R BT.2302-1,ITU-R BT.2302-2021 Spectrum requirements for terrestrial television broadcasting in the UHF frequency band in Region 1 and the Islamic Republic of Iran

SCC

MIL MIL-R-28887-1984 RADIO GROUP, VLF, LF, MF, AND HF
MIL MIL-R-28886A-1985 RECEIVER, LOW FREQUENCY, MEDIUM FREQUENCY, AND HIGH FREQUENCY COMMUNICATIONS (SUPERSEDING MIL-R-28886)

ITU-R - International Telecommunication Union/ITU Radiocommunication Sector

QUESTION 104/6-1999 Sharing criteria for BSS networks in the 17.3-17.8 GHz band in Region 2@ and in the 21.4-22 GHz band in Regions 1 and 3@ and their associated feeder links
ITU-R S.2112-0-2018 Guidelines to conduct bilateral coordination for explicit agreements@ in the frequency band 14.5-14.75 GHz for Regions 1 and 2 countries@ or in the frequency band 14.5-14.8 GHz for Region 3 countries@ in the fixed-satellite service (Earth-to-space) not fo
ITU-R BO.1776 FRENCH-2006 Reference power flux-density for the broadcasting-satellite service in the band 21.4-22.0 GHz in Regions 1 and 3
ITU-R M.823-2-1997 Technical Characteristics of Differential Transmissions for Global Navigation Satellite Systems from Maritime Radio Beacons in the Frequency Band 283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3
QUESTION 108/6-2003 Digital sound broadcasting in band 7 (HF) in the Tropical Zone
ITU-R M.823-1-1995 Technical Characteristics of Differential Transmissions for Global Navigation Satellite Systems (GNSS) from Maritime Radio Beacons in the Frequency Band 283.5-315 kHz in Region 1 and 285-325 kHz in Regions 2 and 3
ITU-R SM.1049-1 FRENCH-1995 M?THODE DE GESTION DU SPECTRE ? UTILISER POUR FACILITER LE PROCESSUS D'ASSIGNATION DE FR?QUENCE AUX SERVICES DE TERRE DANS LES ZONES FRONTALI?RES
ITU-R SM.1049-1994 Method of Spectrum Management to be Used For Aiding Frequency Assignment for Terrestrial Services in Border Areas
ITU-R RA.479-4-1995 Protection of Frequencies for Radioastronomical Measurements in the Shielded Zone of the Moon

German Institute for Standardization

DIN 45680:1997-03 Measurement and assessment of low-frequency noise immissions in the neighbourhood / Note: To be replaced by DIN 45680 (2011-08), DIN 45680 (2013-09), DIN 45680 (2020-06).

Korean Agency for Technology and Standards (KATS)

KS C 2137-1996(2001) METHODS FOR THE DETERMINATION OF THE DIELECTRIC PROPERTIES OF INSULATING MATERIALS AT HIGH FREQUENCIES

American National Standards Institute （ANSI)

ANSI/INFOCOMM 1M-2009 Audio Coverage Uniformity in Enclosed Listener Areas

CEPT - Conference Europeenne des Administrations des Postes et des Telecommunications

CEPT T/R 25-04 E-1988 Coordination in Frontier Regions of Frequencies for the Land Mobile Service in the Bands between 862 and 960 MHz
ERC REPORT 99-2000 Analysis of the Coexistence of Two FWA Cells in the 24.5 - 26.5 GHZ and 27.5 - 29.5 GHZ Bands (Edinburgh)

Society of Motion Picture and Television Engineers (SMPTE)

SMPTE RP 104-2005 Cross-Modulation Tests for Variable-Area Photographic Audio Tracks

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