The _WSJT-X_ packages include program *`rigctl-wsjtx[.exe]`*, which
can be used to send CAT sequences to a rig from the command line, or
from a batch file or shell script; and program *`rigctld-wsjtx[.exe]`*,
which allows other compatible applications to share a CAT connection
to a rig.  These program versions include the latest Hamlib rig
drivers -- the same ones used by _WSJT-X_ itself.

Additional utility programs *`jt4code`*, *`jt9code`*, and *`jt65code`*
let you explore the conversion of user-level messages into channel
symbols or "`tone numbers,`" and back again.  These programs can be
useful to someone designing a beacon generator, for understanding the
permissible structure of transmitted messages, and for studying
behavior of the error-control codes.

Channel-symbol values for JT4 run from 0 to 3.  The total number of
symbols in a transmitted message is 206.  To run `jt4code`, enter the
program name followed by a JT4 message enclosed in quotes.  In Windows
the command and program output might look like this:

 C:\WSJTX> jt4code "G0XYZ K1ABC FN42"
      Message                 Decoded                Err? Type
 -------------------------------------------------------------------
  1.  G0XYZ K1ABC FN42        G0XYZ K1ABC FN42            1: Std Msg

 Channel symbols
  2 0 0 1 3 2 0 2 3 1 0 3 3 2 2 1 2 1 0 0 0 2 0 0 2 1 1 2 0 0
  2 0 2 0 2 0 2 0 2 3 0 3 1 0 3 1 0 3 0 1 1 1 1 1 0 1 0 0 2 3
  2 2 3 0 2 1 3 3 3 3 2 0 2 1 2 3 0 0 2 3 1 1 1 0 3 1 2 0 3 2
  0 2 3 3 0 1 2 1 2 1 0 1 0 1 1 1 1 3 0 3 0 3 2 3 3 0 3 0 1 0
  3 3 3 0 0 3 2 1 3 2 3 1 3 3 2 2 0 2 3 3 2 1 1 0 2 2 3 3 1 2
  3 1 1 2 1 1 1 0 2 1 2 0 2 3 1 2 3 1 2 2 1 2 0 0 3 3 1 1 1 1
  2 0 3 3 0 2 2 2 3 3 0 0 0 1 2 3 3 2 1 1 1 3 2 3 0 3

Channel-symbol values for JT9 run from 0 to 8, with 0 representing the
sync tone.  The total number of symbols in a transmitted message is
85.  Enter the program name followed by a JT9 message enclosed in
quotes:

 C:\WSJTX> jt9code "G0XYZ K1ABC FN42"
      Message                 Decoded                Err? Type
 -------------------------------------------------------------------
  1.  G0XYZ K1ABC FN42        G0XYZ K1ABC FN42            1: Std Msg

 Channel symbols
  0 0 7 3 0 3 2 5 4 0 1 7 7 7 8 0 4 8 8 2 2 1 0 1 1 3 5 4 5 6
  8 7 0 6 0 1 8 3 3 7 8 1 1 2 4 5 8 1 5 2 0 0 8 6 0 5 8 5 1 0
  5 8 7 7 2 0 4 6 6 6 7 6 0 1 8 8 5 7 2 5 1 5 0 4 0

For the corresponding program *`jt65code`* only the
information-carrying channel symbols are shown, and the symbol values
range from 0 to 63.  Sync symbols lie two tone intervals below data
tone 0, and the sequential locations of sync symbols are described in
the <<JT65PRO,JT65 Protocol>> section of this Guide.

A typical execution of `jt65code` is shown below.  The program
displays the packed message of 72 bits, shown here as 12 six-bit
symbol values, followed by the channel symbols:

 C:\WSJTX> jt65code "G0XYZ K1ABC FN42"
      Message                 Decoded                Err? Type
 ----------------------------------------------------------------------
  1.  G0XYZ K1ABC FN42        G0XYZ K1ABC FN42            1:    Std Msg

 Packed message, 6-bit symbols  61 36 45 30  3 55  3  2 14  5 33 40

 Information-carrying channel symbols
    56 40  8 40 51 47 50 34 44 53 22 53 28 31 13 60 46  2 14 58 43
    41 58 35  8 35  3 24  1 21 41 43  0 25 54  9 41 54  7 25 21  9
    62 59  7 43 31 21 57 13 59 41 17 49 19 54 21 39 33 42 18  2 60

For an illustration of the power of the strong error-control coding in
JT9 and JT65, try looking at the channel symbols after changing a
single character in the message.  For example, change the grid locator
from FN42 to FN43 in the JT65 message:

 C:\WSJTX> jt65code "G0XYZ K1ABC FN43"
      Message                 Decoded                Err? Type
 ----------------------------------------------------------------------
  1.  G0XYZ K1ABC FN43        G0XYZ K1ABC FN43            1:    Std Msg

 Packed message, 6-bit symbols  61 36 45 30  3 55  3  2 14  5 33 41

 Information-carrying channel symbols
    25 35 47  8 13  9 61 40 44  9 51  6  8 40 38 34  8  2 21 23 30
    51 32 56 39 35  3 50 48 30  8  5 40 18 54  9 24 30 26 61 23 11
     3 59  7  7 39  1 25 24  4 50 17 49 52 19 34  7  4 34 61  2 61

You will discover that every possible JT65 message differs from every
other possible JT65 message in at least 52 of the 63
information-carrying channel symbols.

Execution of any of these utility programs with "-t" as the only
command-line argument produces examples of all supported message
types.  For example, using `jt65code -t`:

 C:\WSJTX> jt65code -t
 
      Message                 Decoded                Err? Type
 --------------------------------------------------------------------------
  1.  CQ WB9XYZ EN34          CQ WB9XYZ EN34              1:    Std Msg
  2.  CQ DX WB9XYZ EN34       CQ DX WB9XYZ EN34           1:    Std Msg
  3.  QRZ WB9XYZ EN34         QRZ WB9XYZ EN34             1:    Std Msg
  4.  KA1ABC WB9XYZ EN34      KA1ABC WB9XYZ EN34          1:    Std Msg
  5.  KA1ABC WB9XYZ RO        KA1ABC WB9XYZ RO            1:    Std Msg
  6.  KA1ABC WB9XYZ -21       KA1ABC WB9XYZ -21           1:    Std Msg
  7.  KA1ABC WB9XYZ R-19      KA1ABC WB9XYZ R-19          1:    Std Msg
  8.  KA1ABC WB9XYZ RRR       KA1ABC WB9XYZ RRR           1:    Std Msg
  9.  KA1ABC WB9XYZ 73        KA1ABC WB9XYZ 73            1:    Std Msg
 10.  KA1ABC WB9XYZ           KA1ABC WB9XYZ               1:    Std Msg
 11.  CQ 000 WB9XYZ EN34      CQ 000 WB9XYZ EN34          1:    Std Msg
 12.  CQ 999 WB9XYZ EN34      CQ 999 WB9XYZ EN34          1:    Std Msg
 13.  CQ EU WB9XYZ EN34       CQ EU WB9XYZ EN34           1:    Std Msg
 14.  CQ WY WB9XYZ EN34       CQ WY WB9XYZ EN34           1:    Std Msg
 15.  ZL/KA1ABC WB9XYZ        ZL/KA1ABC WB9XYZ            2:    Type 1 pfx
 16.  KA1ABC ZL/WB9XYZ        KA1ABC ZL/WB9XYZ            2:    Type 1 pfx
 17.  KA1ABC/4 WB9XYZ         KA1ABC/4 WB9XYZ             3:    Type 1 sfx
 18.  KA1ABC WB9XYZ/4         KA1ABC WB9XYZ/4             3:    Type 1 sfx
 19.  CQ ZL4/KA1ABC           CQ ZL4/KA1ABC               4:    Type 2 pfx
 20.  DE ZL4/KA1ABC           DE ZL4/KA1ABC               4:    Type 2 pfx
 21.  QRZ ZL4/KA1ABC          QRZ ZL4/KA1ABC              4:    Type 2 pfx
 22.  CQ WB9XYZ/VE4           CQ WB9XYZ/VE4               5:    Type 2 sfx
 23.  HELLO WORLD             HELLO WORLD                 6:    Free text
 24.  ZL4/KA1ABC 73           ZL4/KA1ABC 73               6:    Free text
 25.  KA1ABC XL/WB9XYZ        KA1ABC XL/WB9            *  6:    Free text
 26.  KA1ABC WB9XYZ/W4        KA1ABC WB9XYZ            *  6:    Free text
 27.  123456789ABCDEFGH       123456789ABCD            *  6:    Free text
 28.  KA1ABC WB9XYZ EN34 OOO  KA1ABC WB9XYZ EN34 OOO      1:    Std Msg
 29.  KA1ABC WB9XYZ OOO       KA1ABC WB9XYZ OOO           1:    Std Msg
 30.  RO                      RO                         -1:    Shorthand
 31.  RRR                     RRR                        -1:    Shorthand
 32.  73                      73                         -1:    Shorthand

MSK144 uses a binary channel code, so transmitted symbols have the value
0 or 1.  Even numbered symbols (index starting at 0) are transmitted on
the I (in-phase) channel, odd numbered symbols on the Q (quadrature)
channel.  A typical execution of `msk144code` is shown below.

 C:\WSJTX> msk144code "K1ABC W9XYZ EN37"

      Message                 Decoded                Err? Type
 --------------------------------------------------------------------------
  1.  K1ABC W9XYZ EN37        K1ABC W9XYZ EN37            1: Std Msg

 Channel symbols (72 per line):
 110000100011001101010101001000111111001001001100110010011100001001000000
 010110001011101111001010111011001100110101011000111101100010111100100011
