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Add basic info on definition of one of the "three extra bits".
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8505 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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@ -9,9 +9,11 @@ additional bit flags a message containing arbitrary alphanumeric text,
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up to 13 characters. Special cases allow other information such as
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add-on callsign prefixes (e.g., ZA/K1ABC) or suffixes (e.g., K1ABC/P)
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to be encoded. The basic aim is to compress the most common messages
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used for minimally valid QSOs into a fixed 72-bit length. Information
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payloads in FT8 include 3 additional bits (75 bits total), with
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definitions yet to be defined.
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used for minimally valid QSOs into a fixed 72-bit length. The
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information payload in FT8 includes 3 additional bits (75 bits total).
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One of the added bits is used to flag special messages used by the
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DXpedition station in FT8 DXpedition Mode. Uses for the remaining two
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bits are yet to be defined.
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A standard amateur callsign consists of a one- or two-character
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prefix, at least one of which must be a letter, followed by a digit
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