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Band IV is the name of a
radio frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upp ...
range within the
ultra high frequency
Ultra high frequency (UHF) is the ITU designation for radio frequency, radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one ten ...
part of the
electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from ...
.
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 India Ltd all define the range of Band IV from 470 to 582
MHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...
. An
EICTA
DIGITALEUROPE is the European organisation that represents the digital technology industry whose members include 98 major technology companies and 4national trade associations It seeks to ensure industry participation in the development and implem ...
paper
defines the range as 474 to 602 MHz, whilst the
BBC #REDIRECT BBC #REDIRECT BBC
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...
define the range as 470 to 614 MHz.
Band IV is primarily used for analogue and digital (
DVB-T
DVB-T, short for Digital Video Broadcasting – Terrestrial, is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in Singapore in Febr ...
,
ATSC and
ISDB)
television
Television, sometimes shortened to TV, is a telecommunication medium for transmitting moving images and sound. The term can refer to a television set, or the medium of television transmission. Television is a mass medium for advertisin ...
broadcasting, as well as services intended for
mobile device
A mobile device (or handheld computer) is a computer small enough to hold and operate in the hand. Mobile devices typically have a flat LCD or OLED screen, a touchscreen interface, and digital or physical buttons. They may also have a physical ...
s such as
DVB-H.
Television
Australia
In
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
UHF channel allocations are 7 MHz wide. Band IV includes channels 28 to 35, with base frequencies of 529.5 MHz to 578.5 MHz. More details are available on the
television frequencies page.
New Zealand
In
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
UHF channel allocations are 8 MHz wide. Band IV includes channels 25 to 35, with base frequencies of 506.0 MHz to 586.0 MHz. More details are available on the
television frequencies page.
United Kingdom
In the
UK, Band IV allocations are 8 MHz wide, traditionally consisting of 14 channels from UHF 21 to 34 inclusive. However, in the mid-1990s the squeezing of analogue
Channel 5 broadcasts into the existing national terrestrial TV transmitter network effectively closed a gap between bands IV and V, which was previously reserved for
radar
Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
applications and home consumer devices. This stretched the practical definition of Band IV in the UK to cover 18 channels from UHF 21 to 38 inclusive.
Aerials of the ''group A'' type cover this band.
The following table covers the most inclusive definition of Band IV in the UK. Rows with a yellow background indicate channels which were not traditionally (before the mid-1990s) considered part of Band IV for TV broadcasting purposes and may not be considered part of the band in other countries (e.g. Switzerland
).
References
Radio spectrum
Broadcast engineering
{{tv-tech-stub