What You'll Learn In This Chapter - HP 7470A Interfacing And Programming Manual

Chapter
RS-232-C/CCITT V.24
Interfacing
What You'll Learn in This Chapter
This chapter is only for 7470 owners with an RS-232-C interface. H P
7470s with Option 001 have an RS-232-C interface.
This chapter describes how to connect the plotter, terminal, and com­
puter in a modem or hardwire environment. It also discusses connect­
ing the interface, pin allocations in the connector, baud rates, stop bits,
and transmission errors. A tutorial description of the four handshak­
ing methods, hardwire h a n d s h a k e , Xon-Xoff handshake, enquire/
acknowledge handshake, and software checking handshake, is included.
The last part of the chapter is devoted to the 14 device control instruc­
tions. The syntax of device control instructions is given, followed by a
detailed section on each instruction. It is important to be able to use
these instructions properly to establish communications with the plotter
in your operating environment. You need to master the material in this
chapter so you can successfully send HP-GL commands to the plotter.
NOTE: All information in this chapter applies equally to RS-232-C a n d
CCITT V.24 interfaces. For purposes of simplicity, both are referred to
as RS-232-C. ■
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RS-232-C/CCITT V.24 INTERFACING 10-1