Hal Communications CWR6850, Instruction Manual

Page: 33 / 64

CHAPTER 4 PAGE 33
TABLE 4 ASCII DATA CODE
BITS 7 0 0 0 0 1 1 1 1 NOTES:
6 0 0 1 1 0 0 1 1 Mark = "1"
4 3 2 1 5 0 1 0 1 0 1 0 1 = TTL high
0 0 0 0 NUL DLE SPC 0 @ P ' p Space = "0"
0 0 0 1 SOH DC1 ! 1 A Q a q = TTL low
0 0 1 0 SIX DC2 " 2 B R b r
0 0 1 1 ETX DC3 * 3 C S c s
0 1 0 0 EOT DC4 $ 4 D T d t
0 1 0 1 ENQ NAK % 5 E U e u
0 1 1 0 ACK SYN & 6 F V f v
0 1 1 1 BEL ETB ' 7 G W g w
1 0 0 0 BS CAN ( 8 H X h x
1 0 0 1 HT EM ) 9 I Y i y
1 0 1 0 LF SUB # : J Z j z
1 0 1 1 VT ESC + ; K [ k {
1 1 0 0 FF FS , < L \ l |
1 1 0 1 RTN
GS - = M ] m }
1 1 1 0 SO HS . > N ^ n
1 1 1 1 SI US
/ ? O _ o RBO
ACK = acknowledge HT = horizontal tab BAUD CHAR/ SELECT
BEL = signal bell LF = line feed RATE SEC. PULSE
BS = back space NAK = not acknowledge (ms)
CAN = cancel NUL = null 45.45 4.13 22.00
DC1 = device control 1 RS = record separator 50.00 4.55 20.00
DC2 = device control 2 RTN = carriage return 56.92 5.17 17.57
DCS = device control 3 RBO = RUB OUT = DEL 74.20 6.75 13.47
DC4 = device control 4 SI = shift in 110.0 10.0 9.09
DLE = data link escape SO = shift out 300.0 30.0 3.33
EM = end of medium SOH = start of heading
EOT = end of trans.
SIX = start of text
ESC = escape SUB = substitute
ETB = end of block SIN = synchronous idle
ETX = end of text US = unit separator Transmission bit order:
FF = form feed (home) VT = vertical tab
bit 1 to bit 7
FS = form separator ENQ = enquiry = WRU bit 8 = even parity
GS = group separator SPC = space bar
The KOS (Keyboard Operated Switch) feature may be used to automatically control the transmit-
receive circuitry of the station. The KOS transistor switch will turn-on the transmitter whenever
typed text is available for transmission and the transmit output of the CWR6850 is enabled (use
AUTO switch position and "CTRL-A" (or "CTRL-X") as explained in sections 4.2 and 4.4).
4.7 HDX / FDX Operation
The CWR6850 may be operated in either a half-duplex (HDX) or full duplex (FDX) transmit connec-
tion, selected with the RX / TAPE switch. Normal amateur RTTY communications are usually con-
ducted with equipment connected for half duplex operation. A full duplex connection is often used
between a computer and a terminal.