mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-03 07:51:16 -05:00
82 lines
3.8 KiB
Plaintext
82 lines
3.8 KiB
Plaintext
Proposed new message types have a 77-bit payload. For most purposes
|
|
these are interpreted as 3 bits (i3) for "message type" and 74
|
|
information bits. Any message type that uses fewer than 74
|
|
information bits can assign the remaining bits to define message
|
|
subtypes. For example, Type i3=0 uses 71 information bits and the
|
|
remaining 3 bits, here called n3, define 8 subtypes.
|
|
|
|
----------------------------------------------------------------------------------
|
|
i3.n3 Example message Bits Total Purpose
|
|
----------------------------------------------------------------------------------
|
|
0.0 FREE TEXT MSG 71 71 Free text
|
|
0.1 K1ABC RR73; W9XYZ <KH1/KH7Z> -11 28 28 10 5 71 DXpedition Mode
|
|
0.2 PA3XYZ/P R 590003 IO91NP 28 1 1 3 12 25 70 EU VHF contest
|
|
0.3 WA9XYZ KA1ABC R 16A EMA 28 28 1 4 3 7 71 ARRL Field Day
|
|
0.4 WA9XYZ KA1ABC R 32A EMA 28 28 1 4 3 7 71 ARRL Field Day
|
|
0.5 0123456789abcdef01 71 71 Telemetry (18 hex)
|
|
0.6
|
|
0.7
|
|
|
|
1 WA9XYZ/R KA1ABC/R R FN42 28 1 28 1 1 15 74 Standard msg
|
|
2 TU; W9XYZ K1ABC R 579 MA 1 28 28 1 3 13 74 ARRL RTTY contest
|
|
3 PA3XYZ/P GM4ABC/P R JO22 28 1 28 1 1 15 74 EU VHF contest
|
|
4 <WA9XYZ> PJ4/KA1ABC RR73 13 58 1 2 74 Nonstandard calls
|
|
5 ...
|
|
6
|
|
7
|
|
----------------------------------------------------------------------------------
|
|
In case we need them, later:
|
|
|
|
5 TU; W9XYZ K1ABC R 579 8 MA 1 28 28 1 3 6 7 74 CQ WW RTTY
|
|
6 TU; W9XYZ K1ABC R 579 MA 1 28 28 1 3 13 74 CQ WPX RTTY
|
|
----------------------------------------------------------------------------------
|
|
NB: three 74-bit message types and two 71-bit message subtypes are still TBD.
|
|
----------------------------------------------------------------------------------
|
|
|
|
Facts about the 28-bit integers used to encode standard callsigns:
|
|
2^28 = 268,435,456 Available values
|
|
37*36*10*27*27*27 = 262,177,560 Needed for standard callsign structure
|
|
11*10*10*27*27*27 = 21,651,300 nnnaaa, _nnaaa (n=digit, a=letter or blank)
|
|
2^24 = 16,777,216 available for 24-bit hash code
|
|
4,874,084 available for special CQs, etc.
|
|
|
|
The 28-bit callsign field includes about 19 million impossible "calls"
|
|
that start with three digits. That's more than 2^24 = 17,777,216, so
|
|
these values could be used to implement a 24-bit CRC -- in addition to the
|
|
"CQ xx" and "CQ nnn" forms, possibly enhanced a bit further.
|
|
|
|
Further details:
|
|
|
|
0.0 Free text, up to 13 characters.
|
|
|
|
0.1 DXpedition mode as developed for KH1/KH7Z.
|
|
|
|
0.2 Report, QSO serial number, 6-digit grid, and Roger for EU VHF contests.
|
|
|
|
0.3 ARRL Field Day exchange for up to 16 transmitters.
|
|
|
|
0.4 ARRL Field Day exchange for up to 17-32 transmitters.
|
|
|
|
1. Two standard callsigns, Roger, and grid or report. Each callsign
|
|
may have an appended "/R" to indicate Rover status for NA VHF
|
|
contests.
|
|
|
|
2. Standard message for ARRL RTTY Roundup. Optional "TU;" at
|
|
beginning to finish a previous QSO; then two standard callsigns,
|
|
optional "R", a 3-bit report (529 to 599), and 13 bits to indicate
|
|
US state, Canadian province/territory, or DX serial number.
|
|
|
|
3. Same as Type 1, but uses /P instead of /R. For European VHF contests.
|
|
|
|
4. One nonstandard call with up to 11 characters, one hashed call,
|
|
followed by <blank>, RRR, RR73, or 73.
|
|
|
|
---------------------------------------------------------------------------
|
|
The following are tentative, not to be included in first release:
|
|
|
|
5. CQ WW RTTY - US/Can: RST CQZ state/prov R 579 5 NJ R1 r3 z6 u7
|
|
DX: RST + CQzone R 559 15 R1 r3 z6
|
|
|
|
6. CQ WPX RTTY - RST + serial R 589 0013 R1 r3 n12
|
|
|