[hpsdr] Chirp Beacon Callsign Encoding

[Larry Koziel]

Phil,

If you're referring to Appendix B of K1JT's JT65 Protocol, I believe 
that's a list of prefixes
that can be prepended to a callsign ahead of the slant bar to indicate 
operation outside
the country of license, VK/K8MU. Section 4 on JT65 Source Encoding 
explains how the
callisigns themselves are encoded, and he explains how that should any 
callsign according
to the "rules by which standard callsigns are constructed."

As I understand it, the original protocol supported only "bare" 
callsigns--no
prepended or appended modifiers. These were added later with some 
limitations. The
list that is missing G, GM, GW, GD does include M, MM, MW, and MD which 
are sufficient
to indicate the country of portable operation. Likewise, K is the only 
US prefix on the list.

73,

Larry K8MU


> I'm currently working on the encoder software for the Chirp beacon that we
> are installing in VK6.
>
> Rather than re-invent an encoder I had a look at the callsign table used
> by WSPR/JT65.  There appears to be a number of common callsigns missing
> (e.g. G, GM, GW, GD ) - or perhaps I'm looking at an old version of the
> table?
>
> Could someone experienced in using these  modes please comment on any
> issues relating to the callsign table.
>
> Thanks
>
> 73 Phil...VK6APH
>

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