[aprssig] Now - A New 6m tracker proposal
Robert Bruninga
bruninga at usna.edu
Sun Nov 27 17:32:45 EST 2005
Actually, Jim was right to bring up the 800 Lb gorrilla
in the back of the room (skywave) that would really
make a mess of a single frequency local alternate
APRS frequency. So lets go back to the original 6m
proposed band which was the start of this thread.
>Updated design goals for a 6m APRS black box tracker:
> >
> > 1) Xtal controlled 25W tracker on 6 meters
> > 2) Operates same AFSK 1200 baud as 2m
> > 3) Could use modified CB whips
> > 4) XTAL RX at digipeater should also be simple kit
> * 5) Tracker PIC processor INTERROGATES other
> * VOICE radios in the car and includes the present
> * OPERATING frequency in the position report.
> * 7) Posit should be the extremely short Mic-E format
> * 8) PIC should do automatic time-slot assignment
> (1-to-225) according to the sum of the last 3
> * bytes of the call plus the SSID.
* * 9) Use of time slotting avoids the need for a
* * CSMA receiver in the tracker.
de WB4APR
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