diff --git a/manpages/man1/jt65code.1.txt b/manpages/man1/jt65code.1.txt index 3d9ff18ff..0c3dc377e 100644 --- a/manpages/man1/jt65code.1.txt +++ b/manpages/man1/jt65code.1.txt @@ -11,6 +11,7 @@ jt65code, jt9code - Weak signal communications encoding support utility. == SYNOPSIS *jt65code* MESSAGE + *jt9code* MESSAGE == DESCRIPTION @@ -27,6 +28,7 @@ sync tone. The total number of symbols in a transmitted message is enclosed in quotes. In Windows the command and program output might look like this: +..... $ jt9code "G0XYZ K1ABC FN42" Message: G0XYZ K1ABC FN42 Channel symbols: @@ -34,6 +36,7 @@ Channel symbols: 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 Decoded message: G0XYZ K1ABC FN42 +..... For the corresponding program jt65code only the information-carrying channel symbols are shown, and the symbol values range from 0 to @@ -45,6 +48,7 @@ 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: +..... $ jt65code "G0XYZ K1ABC FN42" Message: G0XYZ K1ABC FN42 Packed message, 6-bit symbols: 61 36 45 30 3 55 3 2 14 5 33 40 @@ -53,12 +57,14 @@ Information-carrying channel symbols: 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 Decoded message: G0XYZ K1ABC FN42 +..... 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 locater from FN42 to FN43 in the JT65 message: +..... $ jt65code "G0XYZ K1ABC FN43" Message: G0XYZ K1ABC FN43 Packed message, 6-bit symbols: 61 36 45 30 3 55 3 2 14 5 33 41 @@ -67,6 +73,7 @@ Information-carrying channel symbols: 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 Decoded message: G0XYZ K1ABC FN43 +..... You will discover that every possible JT65 message differs from every other possible JT65 message in at least 52 of the 63