One solution is frequency agility. Most modern transceivers can be QSY'd by station automation software, which could monitor several frequencies within a semi-automatic sub-band for inbound traffic. An attended station wishing to engage an unattended station would send a request on a locally-clear frequency; if no response were received, it would assume this frequency to be busy at the unattended station's QTH, and try an alternate frequency.
Coordination within the semi-automatic sub-bands would also help. 73, Dave, AA6YQ --- In digitalradio@yahoogroups.com, "RussellHltn" <[EMAIL PROTECTED]> wrote: > >>> I, actually, do not agree that there is a need for more new > restrictions... nor do we need to further restrict the automatic and > semiautomatic modes... > > ...it is now possible to write software to detect channel busy > situations...<<< > > That's fine for protecting attended modes from fully-automatic unattended > modes, but what about those who are setting up NTS-like systems? Shouldn't > something be set up for them? > > Innovation is not limited to just attended modes. I don't see a software > solution to helping out the fully-automatic if they have to wait for > everyone else to clear out of the frequency to operate. At least a > gentleman's agreement to avoid a sub-band would help and some kind of > coordination so that different systems can be coordinated in that sub-band. The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ Discussion Forums at http://www.obriensweb.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/