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Amended rules for 77-bit message types.

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This commit is contained in:
Joe Taylor 2018-06-22 16:36:14 -04:00
parent 2edcebef40
commit 7266d407ff
1 changed files with 21 additions and 4 deletions
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25
lib/77bit/77bit.txt
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@ -10,19 +10,30 @@ i3.n3 Example message Bits Total Purpose
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 71-bit telemetry 71 71 TBD
0.5 0123456789abcdef01 71 71 Telemetry (18 hex)
0.6
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 R-11 13 53 1 1 6 74 Nonstandard calls
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.
----------------------------------------------------------------------------------
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.
@ -46,7 +57,13 @@ Further details:
3. Same as Type 1, but uses /P instead of /R. For European VHF contests.
4. One nonstandard call with up to 10 characters, one hashed call, Roger,
and signal report.
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