6.5 Plotter Connector (57)
In addition to the RS-232-C port (56) used for remote 9400A operation,
a second RS-232-C port (57) has been incorporated to facilitate direct
interfacing of the 9400A with a digital plotter. Plotters are used for
hard copy archiving of displayed waveforms and other screen data. Pin
assignments for the plotter connector are identical to those of the
remote RS-232-C port (56).
While a plotter unit connected to the 9400A’s RS-232-C port can be
computer controlled from a host computer via the optional GPIB port,
the oscilloscope’s on-board digital plotter drivers permit hard copies
to be made without an external computer.
Plotter connector pin assignments:
Pin #
Description
2 T x D
3 RxD
4 RTS
5 CTS
20 DTR
6 DSR
1 GND
7 SIG GND
Transmitted Data (from the 9400A)
Received Data (to the 9400A)
Request To Send (always on) (from the 9400A)
Clear To Send (to the 9400A)
When TRUE, the 9400A can transmit.
When FALSE, transmission stops.
Used for 9400A output hardware handshake.
Data Terminal Ready (from the 9400A)
Always TRUE.
Data Set Ready (to the 9400A)
Protective Ground
Signal Ground
This corresponds to a DTE (Data Terminal Equipment) configuration.
6-2
Rear Panel Controls and Connectors
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