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[aprssig] KPC-3+ Trackers (not blind)...

Robert Bruninga bruninga at usna.edu
Thu Oct 27 23:02:28 UTC 2005


For what it is worth.  KPC-3+ dumb GPS trackers
CAN display all other APRS stations on an attached
GPS just like the D7 and D700 do.

Its a feature built into APRSdos to "translate" all
on-air position reports to a WPL packet and then
trasmit that locally to all such KPC-3+ trackers.

The tracker is still just a dumb tracker but its
GPS can now see and display everyone else.

NOTE, this is Channel intensive and is not encouraged
for general use since it DOUBLES the packets on the
air.  But it does allow such dumb and blind trackers to 
at least see what is around them at special events. 

Normally since these trackers are dumb, the best
way to set this is up is just to have the APRSdos
station listening on 144.39 and then translating
all positions heard for all stations and transmitting
them on a different local frequency.

The KPC-3+ dumb trackers listen on that local freq
but transmit like normal on 144.39.  Then, as long
as they are in range of the centralized APRSdos
station or a digi on the same freq, they can "see" 
APRS just like the kenwoods.  (but they still have 
no message capability)...

Just another rarely used APRSdos function. 
 But very good if you need it. 

de Wb4APR, Bob






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