[hpsdr] Standalone WSPR beacon

[Berndt Josef Wulf]

G'day,

what has become of the "Standalone WSPR Beacon" project that used the
Penelope/Pennylane? There was some experimental code, but did it ever
make it to a release? From memory, the problem was that it didn't had
synchronisation with an external clock, e.g. time_of_day and 1PPS, and
needed to be started at the beginning of an even 2min period.

73, Berndt
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