CCIR 493-4 Selcall
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.
- Hobby Level Software
- Professional Equipment/Software
- HFAsia Codan-8580 Selcall
- HFLink Selcall Info
- CCIR 493-4 Selcall Standard, United Nations
- WAVECOM Database: Codan SELCAL
- shoc Database: Codan SELCAL