. GENERAL SPECIFICATIONS
Creator: Patrick Lindecker F6CTE (2001)
Description :
Baud rate : 10
Speed : 18 wpm
Modulation : DBPSK
Reception mode: indifferent (LSB or USB)
Character set : 56 "Varicode" characters " A..Z 0..9 <CR> <ESPACE> . , " : - = + ? $ ' ( ) ! / @ & # * with an error reset character and an idle character (displayed by ">").
Small characters are transformed in capital characters and special characters as
" é " are transformed in standard capital (in the example: " E ").
Shape of pulse : rectangular but the connection between 2 successive different bits is done by a decreasing sine then by a creasing sine (each of one during quarter of period)
Bandwidth : about 40 Hz
Demodulation : coherent,
Synchronization: automatic using the signal
Correction code: no
Convolution code: no
Interleaving : no
Repetition : no
Drift tolerance : 40 Hz/mn (depending on signal level)
Lowest S/N for 2% errors: -17 dB (for white noise in a 3 kHz bandwidth)
Using the code inspired from Baudot code
makes the text more simple by not
using small letter case coding all small text is translated to upper case
CHARACTER CODE
Idle character (>)
Space 1
E 0
T 1 1
A 0 1
I 1 0
S 0 0
N 1 1 1
R 1 0 1
O 1 1 0
<CR>+<CL> 0 0 1
C 0 1 0
D 1 0 0
L 1 1 1 1
P 1 1 0 1
M 1 1 1 0
H 0 1 0 1
U 1 0 0 1
F 1 0 1 0
B 1 1 0 0
G 0 0 1 0
0 1 1 1 1 1
9 1 1 1 0 1
5 1 1 1 1 0
1 1 0 1 0 1
2 1 1 0 0 1
3 1 1 0 1 0
4 1 1 1 0 0
6 0 1 0 0 1
7 0 1 0 1 0
8 1 0 0 1 0
. 1 1 1 1 1 1
Y 1 1 1 1 0 1
W 1 1 1 1 1 0
V 1 1 0 1 0 1
, 1 1 1 0 0 1
" 1 1 1 0 1 0
X 1 1 1 1 0 0
K 0 1 0 1 0 1
Error reset key (<) 1 0 0 1 0 1
: 1 0 1 0 0 1
- 1 0 1 0 1 0
= 1 1 0 0 1 0
+ 0 0 1 0 0 1
? 0 0 1 0 1 0
Q 0 1 0 0 1 0
$ 1 1 1 1 1 1 1
' 1 1 1 1 1 0 1
Z 1 1 1 1 1 1 0
J 1 1 1 0 1 0 1
( 1 1 1 1 0 0 1
) 1 1 1 1 0 1 0
! 1 1 1 1 1 0 0
/ 1 0 1 0 1 0 1
@ 1 1 0 0 1 0 1
& 1 1 0 1 0 0 1
# 1 1 0 1 0 1 0
* 1 1 1 0 0 1 0
