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RS-232 CABLE CONFIGURATIONS N - 1
Appendix N
RS-232 Cable confi
g
urations
This appendix supplies additional information about the RS-232 cable
configurations between the oscilloscope and a connected device. The
oscilloscope and most of the devices are Data Terminal Equipment (DTE)
configurated.
Communication lines:
TxD = Transmitted Data
RxD = Received Data
RTS = Request To Send
CTS = Clear To Send
DTR = Data Terminal Ready
DSR = Data Set Ready (= Modem Ready)
DCD = Data Carrier Detect
S.GND = Signal ground
F.GND = Safety ground
A. Cable to printer/plotter/controller with software handshake
parameters: "3-wire/7-wire" = 3-wire
"XON-XOFF on off" = on
ATTENTION: The maximum Baud rate for the PM8277 and PM8278 plotters is
4800 baud. For a higher Baud rate you must use a hardware
handshake configuration.
NOTE: The LQ1500 printer can have a 6-pole DIN connector with the
following connections:
TxD on pin 1 DTR on pin 2
RxD on pin 3 S.GND on pin 5
3
2
7
8
4
6
1
CASE
5
9PIN
(female)
OSCILLOSCOPE
(DTE)
SIGNAL
TxD
RxD
RfR
CTS
DTR
DSR
DCD
S.GND
F.GND
9PIN
3
2
7
8
4
6
1
5
CASE
25 PIN
2
3
4
5
20
6
8
7
1
DEVICE
(DTE)
ST6930