CCIR 493-4 Selcall

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CCIR 493-4 Selcall
Ccir 493.jpg
Frequencies 3 MHz,30 MHz
Frequency Range 3 MHz - 30 MHz
Mode USB
Modulation FSK
ACF
Bandwidth 300 Hz
Location Worldwide
Short Description CCIR 493-4 Selcall, also known as HF Selcall, Australian Selcall, and Codan 8580 Selcall, is a Selcall standard developed in Australia for the HF band. Used by Amateur radio and Codan Modems.
I/Q Raw Recording
Audio Sample

CCIRComité Consultatif International pour la Radio (Predecessor of the ITU-R) 493-4 Selcall, also known as HFHigh Frequency (3-30 MHz) Selcall, Australian Selcall, and Codan 8580 Selcall, is a Selcall standard developed in Australia for the HFHigh Frequency (3-30 MHz) band. Used by Amateur radio and many HFHigh Frequency (3-30 MHz) modems.

Has a 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). shift and transmits at 100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. Has the characteristic long CWContinuous Wave tone as the preamble. The earlier version of this selcall mode only supports 4-digit selcall addresses, but support for 6-digit ID's has been implemented in newer systems. Codan, Barrett, QMAC, Micom, Icom, Vertex, and Jenal modems support have implemented the 6-digit version. The 6-digit version is backwards compatible with the original 4-digit version, but the 4-digit version cannot decode a 6-digit selcall.



Samples[edit]

Selcall example
CCIR selcall sample codan.jpg

Additional Samples:

Video Examples[edit]

Decoding Software[edit]

Hobby Level Software


Professional Equipment/Software

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