On 20/11/2018 14:20, Black Michael via wsjt-devel wrote:
Is the specific contest mode used during decode? Couldn't the meaning
of those 3 bits change depending on which contest is in place?
de Mike W9MDB
Hi Mike,
that is a possibility for this very specific case where Winter FD
corresponds very closely with the traditional FD format. OTOH, in
general, the 77-bit message source encoding is not context specific.
Having context specific interpretations of decoded messages can have
nasty and unforeseen consequences, as we learned to our cost with the NA
VHF contest mode implemented with the 75-bit MSK144 message payloads. In
fact avoiding such hacks was one of the prime driving forces for the new
77-bit message payload and source encoding.
73
Bill
G4WJS.
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