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Low Frequency
LOW FREQUENCY (LOW FREQ) or LF is the ITU designation for radio frequencies (RF) in the range of 30 kilohertz (kHz)–300 kHz. As its wavelengths range from ten kilometres to one kilometre, respectively, it is also known as the KILOMETRE BAND or KILOMETRE WAVE. LF radio waves exhibit low signal attenuation , making them suitable for long-distance communications. In Europe and areas of Northern Africa and Asia, part of the LF spectrum is used for AM broadcasting as the "longwave " band. In the western hemisphere, its main use is for aircraft beacon, navigation ( LORAN
LORAN
), information, and weather systems. A number of time signal broadcasts are also broadcast in this band
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Band V
BAND V (meaning Band 5) is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum . It is not to be confused with the V band in the extremely high frequency part of the spectrum. Sources differ on the exact frequency range of UHF Band V. For example, the Broadcast engineer's reference book and the BBC
BBC
define the range as 614 to 854 MHz
MHz
. The IPTV India Forum define the range as 582 to 806 MHz
MHz
and the DVB Worldwide website refers to the range as 585 to 806 MHz
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Band IV
BAND IV is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum . Sources differ on the exact frequency range of the band. For example, the Swiss Federal Office of Communications, the Broadcast engineer's reference book and Ericsson
Ericsson
India Ltd all define the range of Band IV from 470 to 582 MHz
MHz
. An EICTA paper defines the range as 474 to 602 MHz, whilst the BBC
BBC
define the range as 470 to 614 MHz. Band IV is primarily used for analogue and digital ( DVB-T
DVB-T
, ATSC
ATSC
and ISDB
ISDB
) television broadcasting, as well as services intended for mobile devices such as DVB-H
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Band II
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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Low (band)
LOW is an American indie rock group from Duluth, Minnesota
Duluth, Minnesota
, formed in 1993. As of 2010, the group is composed of founding members Alan Sparhawk (guitar and vocals) and Mimi Parker (drums and vocals), joined by Steve Garrington (bass guitar ). Previous bassists for the band include John Nichols from 1993 to 1994; Zak Sally from 1994 to 2005 and Matt Livingston from 2005 to 2008. The music of Low is characterized by slow tempos and minimalist arrangements. Early descriptions sometimes referred to it as a rock subgenre called "slowcore " often compared to the band Bedhead , who played this style during the 1980s and early 1990s. However, Low's members ultimately disapproved of the term
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C Band (NATO)
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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Band VI
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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Meter
The METRE (international spelling ) or METER (American spelling ) (from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is M. The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 seconds . The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole . In 1799, it was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86 . In 1983, the current definition was adopted. The imperial inch is defined as 0.0254 metres (2.54 centimetres or 25.4 millimetres). One metre is about  3 3⁄8 inches longer than a yard , i.e. about  39 3⁄8 inches
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International Telecommunications Union
The INTERNATIONAL TELECOMMUNICATION UNION (ITU; French: Union Internationale des Télécommunications (UIT)), originally the INTERNATIONAL TELEGRAPH UNION (French: Union Télégraphique Internationale)), is a specialized agency of the United Nations
United Nations
(UN) that is responsible for issues that concern information and communication technologies . The ITU coordinates the shared global use of the radio spectrum , promotes international cooperation in assigning satellite orbits , works to improve telecommunication infrastructure in the developing world, and assists in the development and coordination of worldwide technical standards
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North Africa
NORTH AFRICA is a collective term for a group of Mediterranean countries situated in the northern-most region of the African continent
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Attenuation
In physics , ATTENUATION or, in some contexts, EXTINCTION is the gradual loss of flux intensity through a medium . For instance, dark glasses attenuate sunlight , lead attenuates X-rays , and water and air attenuates both light and sound at variable attenuation rates. Hearing protectors help reduce acoustic flux from flowing into the ears. This phenomenon is called acoustic attenuation and is measured in decibels (dBs). In electrical engineering and telecommunications , attenuation affects the propagation of waves and signals in electrical circuits , in optical fibers , and in air. Electrical attenuators and optical attenuators are commonly manufactured components in this field
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Kilohertz
The HERTZ (symbol: Hz) is the derived unit of frequency in the International System of Units
International System of Units
(SI) and is defined as one cycle per second . It is named for Heinrich Rudolf Hertz
Hertz
, the first person to provide conclusive proof of the existence of electromagnetic waves . Hertz
Hertz
are commonly expressed in multiples : kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the unit's most common uses are in the description of sine waves and musical tones , particularly those used in radio - and audio-related applications. It is also used to describe the speeds at which computers and other electronics are driven
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Band III
BAND III is the name of the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 174 to 240 megahertz (MHz). It is primarily used for radio and television broadcasting. It is also called HIGH-BAND VHF, in contrast to Bands I and II. CONTENTS* 1 Broadcast Television
Television
* 1.1 North America * 1.2 Europe * 1.3 Russia and other former members of OIRT * 2 Radio
Radio
* 3 Worldwide usage * 3.1 Europe * 3.2 North America * 4 References BROADCAST TELEVISIONNORTH AMERICAThe band is subdivided into seven channels for television broadcasting, each occupying 6 MHz. CHANNEL FREQUENCY RANGE 7 174-180 MHz 8 180-186 MHz 9 186-192 MHz 10 192-198 MHz 11 198-204 MHz 12 204-210 MHz 13 210-216 MHzEUROPEEuropean Band III allocations vary from country to country, with channel widths of 7 or 8 MHz
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Band I
BAND I is a range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum . Band I ranges from 47 to 68 MHz
MHz
for the European Broadcasting
Broadcasting
Area, and from 54 to 88 MHz
MHz
for the Americas and it is primarily used for broadcasting service (television broadcasting ) in line to ITU Radio Regulations (article 1.38). Channel spacings vary from country to country, with spacings of 6, 7 and 8 MHz
MHz
being common
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W Band
The W BAND of the microwave part of the electromagnetic spectrum ranges from 75 to 110 GHz
GHz
, wavelength ≈2.7–4 mm . It sits above the U.S. IEEE
IEEE
-designated V band (50–75 GHz) in frequency, and overlaps the NATO designated M band (60–100 GHz). The W band is used for satellite communications, millimeter-wave radar research, military radar targeting and tracking applications, and some non-military applications. A number of passive millimeter-wave cameras for concealed weapons detection operate at 94 GHz. A frequency around 77 GHz
GHz
is used for automotive cruise control radar . The atmospheric radio window at 94 GHz
GHz
is used for imaging millimeter-wave radar applications in astronomy, defense, and security applications
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J Band (NATO)
The NATO J BAND is the obsolete designation given to the radio frequencies from 10 to 20 GHz
GHz
(equivalent to wavelengths between 3 and 1.5 cm) during the cold war period. Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crises management planning, training, Electronic warfare
Electronic warfare
activities, or in military operations, this system is still in use
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