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[aprssig] Symbol Protocol Help

Ev Tupis w2ev at yahoo.com
Wed Apr 23 12:20:02 UTC 2008


--- Robert Bruninga <bruninga at usna.edu> wrote:
> > These are 12 "series" defined.  What would keep
> > more from being defined and used (other than
> > the fact the the symbol set doesn't exist in
> > the clients)?
> 
> Because they are only an artificial nomenclature for
> the original #$ array.  Which can only be 3420
> combinations.
----------------------------------------------

Of course, this begs more questions :) ...

Where have I erred in my math?

12 "series"
(Primary/Alternate, Lowercase/Secondary, B????/O????,
M????/N????, H????/D????, J????/Q????)

multiplied by 36 "elements"
(0-9, A-Z)

equals 432. How did you arrive at being already
limited because of being at 3420?

Also, what are the valid characters for the z-value of
xyz?

Are there any APRS protocol restrictions (without
regard as to the existing client's ability to actually
decode it) to using GPS/SYM/SPCxyz in an APRS
datagram? (i.e.-WB4APR>SYMLPR,WIDE2-1,...)

Kind regards,
Ev, W2EV



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