Hi Patrick, The ending Zero [0] is used for group call addressing. Examples: 3000 is All Call for addresses 3001-3999 3300 is a Group Call for addresses 3301-3399 3310 is a Sub-Group call for addresses 3311-3319
Hams register selcall addresses with voluntary coordination in the HFLINK database. It is possible to have about 9000 unique selcall addresses with this system. If more are needed, the same addresses may be used again in different regions of the world or different channels. It would be very interesting to see 9000 hams on HF selcall! The system may scan channels, similar to ALE. A universal calling preamble is transmitted for 10 seconds, before the to/from addresses. The preamble also provides the bit clock locking. For ham radio, Selcall and ALE share the same HF channels: http://hflink.com/channels Sellcall is more common in use on these channels: Dial Freq Region 1845.0 USB International 1996.0 USB North America 3791.0 USB International 3996.0 USB North America 5371.5 USB International 5403.5 USB International 7185.5 USB International 7296.0 USB North America 10145.5 USB International 14342.5 USB International 18157.5 USB International 21437.5 USB International 24977.5 USB International 28327.5 USB International 73 Bonnie KQ6XA --- In digitalradio@yahoogroups.com, "Patrick Lindecker" <[EMAIL PROTECTED]> wrote: > > Hello Bonnie, > > TKS for information. > > I did not find the CCIR 493-4 but I have found the Hflink Selcall list, > > Here is an example: > SELCALL ADDRESS CALLSIGN NAME COMMENT > 3300 GROUPCALL NORTH AMERICA CALLSIGN AREAS= 6/7. > > Moreover each equipment has its all Selcall. So a Ham can have one or several Selcalls. > > But who gives the Selcall number (as it seems to be a limited ressource)? > > 73 > Patrick > > > > ----- Original Message ----- > From: expeditionradio > To: digitalradio@yahoogroups.com > Sent: Saturday, May 12, 2007 12:39 AM > Subject: [digitalradio] 100 baud FSK SELCALL Re: RTTY Configurations > > > Hi Patrick, > > The marine Digital Selective Calling is GMDSS (ITU-R M.493-9 to > M.493-11) DSC. > > Hams are using the "Australian" Selcall (CCIR 493-4), an older version > of this standard, with addresses limited to 4 numeric characters. This > standard is used by Codan, Barrett, QMAC, Vertex, Icom, etc. It is > common to Australian HF 4WD VKS737 system and other services. > > I believe the character coding table for the Australian Selcall is the > same for new GMDSS DSC. > > The protocol for CCIR 493-4 is much more simple than GMDSS DSC. > I have bits of the CCIR 493-4 specification, but I do not have the > complete original document. When I get time to upload them, I will > make the specs available on the HFLINK website soon. > > Bonnie KQ6XA > > --- In digitalradio@yahoogroups.com, "Patrick Lindecker" <f6cte@> > wrote: > > > > Hello Bonnie, > > > > Do you mean that it is the same system as GMDSS DSC used for digital > selective calling system for use in the maritime mobile service? > (ITU-R M.493-11 recommendation) > > > > 73 > > Patrick > > > > > > > > > > ----- Original Message ----- > > From: expeditionradio > > To: digitalradio@yahoogroups.com > > Sent: Friday, May 11, 2007 10:39 PM > > Subject: [digitalradio] 100 baud FSK SELCALL Re: RTTY Configurations > > > > > > > Does anyone run 100wpm ASCII RTY anymore? > > > > There is increasing use of 100 baud FSK SELCALL in ham radio. > > This is HF SELCALL CCIR 493-4 (Australian Selcall). > > HFLINK maintains a database listing of operators using it: > > http://tech.groups.yahoo.com/group/hflink/database > > > > It is similar to Marine DSC (ITU-R 493-9) which is also 100baud FSK. > > It is only used with USB (upper sideband), and > > the mark (lower) frequency is fixed at 1700Hz. > > It uses FEC, and it is a very robust system. > > > > Bonnie KQ6XA > > >
