Search results
Results From The WOW.Com Content Network
Specific frequency allocations vary from country to country and between ITU regions as specified in the current ITU HF frequency allocations for amateur radio. [1] The list of frequency ranges is called a band allocation, which may be set by international agreements, and national regulations.
Individual administrations may create domestic allocations under the terms of Article 4.4 of the ITU Radio Regulations. Where the allocation is common across all three ITU regions, the table cell is spanned across all three columns. If an ITU region lacks an equivalent allocation for a band, the table cell is grayed out.
In the ITU Table of Frequency Allocations, no formal allocation to any radio service is present above 275 GHz, although the regulations themselves cover up to 3,000 GHz (3 THz). However, a number of administrations permit amateur radio experimentation within the 275–3,000 GHz range on a national basis, under license conditions that are ...
Unavailable: Under present ITU guidelines the following call sign prefixes shall not be allocated. [3] They are sometimes used unofficially – such as amateur radio operators operating in a disputed territory or in a nation state that has no official prefix (e.g. S0 in Western Sahara or station 1A0 at Knights of Malta headquarters in Rome).
Allocations are: primary; secondary; exclusive or shared utilization, within the responsibility of national administrations. Allocations of military usage will be in accordance with the ITU Radio Regulations. In NATO countries, military mobile utilizations are made in accordance with the NATO Joint Civil/Military Frequency Agreement (NJFA).
The 1.25-meter, 220 MHz or 222 MHz band is a portion of the VHF radio spectrum internationally allocated for amateur radio use on a primary basis in ITU Region 2, and it comprises frequencies from 220 MHz to 225 MHz. [1]
The International Telecommunication Union (ITU), in its International Radio Regulations, divides the world into three ITU regions for the purposes of managing the global radio spectrum. Each region has its own set of frequency allocations , the main reason for defining the regions.
In general an amateur radio callsign is of one of these forms where: P – prefix character (letter or numeral, subject to exclusions below). Prefixes can be formed using one-letter, two-letters, a digit and a letter, a letter and a digit, or in rare cases a digit and two letters. There is no ITU allocation of digit-only prefixes.