Hal Communications CWR6850, Instruction Manual

Page: 29 / 64

CHAPTER 4 PAGE 29
the data rate selected, equivalent to the approximate rate that a 25 baud signal would be transmit-
ted. However, the actual baud rate of the data remains at the panel selected 15, 50, etc. baud
rate. This is sometimes called the "ker-plunk" mode for RTTY transmission.
A continuous stream of LTRS characters (11111) may be transmitted with the CTRL-^ command.
When used, all further transmission of text from the transmit buffer is stopped until a second
CTRL-^ turns the feature off. In ASCII, the NUL character (000 0000) is transmitted.
The Baudot Code used in the CWR6850 is shown in Table 2.
BIT NUMBER
5 4 3 2 1 CASE
Letters Figures
NOTES:
0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 0 1 1
0 0 1 0 0
0 0 1 0 1
0 0 1 1 0
0 0 1 1 1
0 1 0 0 0
0 1 0 0 1
0 1 0 1 0
0 1 0 1 1
0 1 1 0 0
0 1 1 0 1
0 1 1 1 0
0 1 1 1 1
1 0 0 0 0
1 0 0 0 1
1 0 0 1 0
1 0 0 1 1
1 0 1 0 0
1 0 1 0 1
1 0 1 1 0
1 0 1 1 1
1 1 0 0 0
1 1 0 0 1
1 1 0 1 0
1 1 0 1 1
1 1 1 0 0
1 1 1 0 1
1 1 1 1 0
1 1 1 1 1
BLANK BLANK
E 3
LF LF
A -
SPACE SPACE
S BELL
I 8
U 7
CR CR
D $
R 4
J '
N ,
F !
C :
K (
T 5
Z "
L )
W 2
H #
Y 6
P 0
Q 1
O 9
B ?
G &
FIGS
FIGS
M .
X /
V ;
LTRS LTRS
Mark = "1" = "low" AFSK tone
= "low" TTL condition
Space = "0" = "high" AFSK tone
= "high" TTL condition
LF = Line Feed = CTRL-J
CR = Carriage Return = CTRL-M
BELL = CTRL-G
STOP = # (FIGS case H)
Transmission order = Bit 1 to Bit 5
Start Pulse = 1 unit space
Stop Pulse = 1.5 unit mark
BAUD AVERAGE SELECT
RATE WPM PULSE
–––––––––––––––––––––––––––––––
45.45
60.61 22.00 ms
50.00 66.67 20.00 ms
56.92 75.89 17.57 ms
74.20 98.99 13.47 ms
110.0 146.7 9.09 ms
300.0 400.0 3.33 ms
Special Baudot Features:
Automatic LTRS/FIGS generation when
transmitting
USOS (Unshift On Space) selectable for
reception of noisy signals
LTRS = CTRL-O
FIGS = CTRL-N