Difference between revisions of "CCIR (selcall)"
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Revision as of 01:11, 7 November 2014
There are many types and formats of CCIR Selcall. For example CCIR 493-4 is a standard format for HF Selcall for Land Mobile applications.[1] CCIR (Consultative Committee on International Radio) functions have largely been taken over by ITU-R. One common type of CCIR selcall used in VHF and UHF FM two-way radio communications, is a 5-tone selective calling system mainly found in some European countries and used by the Swedish Police and the Turkish Police.
The tone duration of a 5 tone CCIR selcall is 100 milliseconds (± 10 ms) and the tones are transmitted sequentially.
CCIR tone frequencies Value Frequency 1 1124 Hz 2 1197 Hz 3 1275 Hz 4 1358 Hz 5 1446 Hz 6 1540 Hz 7 1640 Hz 8 1747 Hz 9 1860 Hz 0 1981 Hz Group (A) 2400 Hz Repeat (E) 2110 Hz