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41 lines
1.8 KiB
Plaintext
41 lines
1.8 KiB
Plaintext
Proposed new message types have 77-bit payload: 74 information bits
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and 3 bits for "message type". Note that Type 0 (as defined by i3)
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uses only 71 information bits, so it allows another 3 bits (here
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called n3) to be used for 8 sub-types.
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----------------------------------------------------------------------------------
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i3 Example message Bits n3 Total Purpose
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----------------------------------------------------------------------------------
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0 FREE TEXT MSG 71 0 71
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0 K1ABC RR73; W9XYZ <KH1/KH7Z> -11 28 28 10 5 1 71 DXpedition Mode
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0 PA3XYZ/P R 590003 IO91NP 28 1 1 3 12 25 2 70 EU VHF contest
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0 WA9XYZ KA1ABC R 16A EMA 28 28 1 4 3 7 3 71 ARRL Field Day
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0 WA9XYZ KA1ABC R 32A EMA 28 28 1 4 3 7 4 71 ARRL Field Day
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1 WA9XYZ/R KA1ABC/R R FN42 28 1 28 1 1 15 74 Standard msg
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2 TU; W9XYZ K1ABC R 579 MA 1 28 28 1 3 13 74 ARRL RTTY contest
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3 PA3XYZ/P GM4ABC/P R JO22 28 1 28 1 1 15 74 EU VHF contest
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4 <WA9XYZ> PJ4/KA1ABC R-11 13 53 1 1 6 74 Nonstandard calls
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5 ...
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6
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7
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----------------------------------------------------------------------------------
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Notes:
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0. Free text message.
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1. 74-bit standard message: two 28-bit callsigns, each with an extra
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bit to indicate "/R" Rover status; one bit for "R" preceding the grid
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or report; 15 bits for grid or report.
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2. Type 2 is for the annual ARRL RTTY Roundup. Optional "TU;" uses
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1 bit; then two 28-bit callsigns, optional "R" (1 bit), a 3-bit
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report, and finally 13 bits for US state, Canadian province, or DX
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serial number.
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3. For European VHF+ contests. Like Type 1, but /P instead of /R.
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4. For European VHF+ contests. Transfers serial QSO number (12 bits)
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and 6-digit grid locator (25 bits).
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