23 centimeters
Encyclopedia
The 23 centimeter, 1200 MHz or 1.2 GHz band is a portion of the UHF (microwave
) radio spectrum internationally allocated to amateur radio
and amateur satellite use on a secondary basis. The amateur radio band is between 1240 MHz and 1300 MHz. The amateur satellite band is between 1260 MHz and 1270 MHz, and its use by satellite operations is only for up-links on a non-interference basis to other radio users (ITU footnote 5.282). The allocations are the same in all three ITU region
s.
In the United Kingdom
the band is between 1240 MHz and 1325 MHz.
Most all modes of communication used in amateur radio can be found in the 23 cm band. Some of the more common modes include voice, Packet, as well as ATV
.
Microwave
Microwaves, a subset of radio waves, have wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz and 300 GHz. This broad definition includes both UHF and EHF , and various sources use different boundaries...
) radio spectrum internationally allocated to amateur radio
Amateur radio
Amateur radio is the use of designated radio frequency spectrum for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training, and emergency communication...
and amateur satellite use on a secondary basis. The amateur radio band is between 1240 MHz and 1300 MHz. The amateur satellite band is between 1260 MHz and 1270 MHz, and its use by satellite operations is only for up-links on a non-interference basis to other radio users (ITU footnote 5.282). The allocations are the same in all three ITU region
ITU region
The International Telecommunication Union , in its International Radio Regulations, divides the world into three ITU regions for the purposes of managing the global radio spectrum...
s.
In the United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
the band is between 1240 MHz and 1325 MHz.
Most all modes of communication used in amateur radio can be found in the 23 cm band. Some of the more common modes include voice, Packet, as well as ATV
Amateur television
Amateur television is the transmission of Broadcast quality video and audio over the wide range of frequencies of allocated for Radio amateur use. ATV is used for non-commercial experimentation, pleasure and public service events...
.
Frequencies of note
- CW and SSB calling frequency is 1296.1 MHz.
- FM simplex calling frequency is 1294.5 MHz.
- FM Simplex Calling Frequency is 1294.0 MHz (VK Australian band-plan 2007)