Keithley 6430, Instruction Manual

Page: 262 / 558

13-4 Remote Operations
GPIB operation
This section contains information about GPIB standards, bus connections, and primary
address selection.
GPIB standards
The GPIB is the IEEE-488 instrumentation data bus with hardware and programming stan-
dards originally adopted by the IEEE (Institute of Electrical and Electronic Engineers) in 1975.
The SourceMeter conforms to these standards:
• IEEE-488.1-1987
• IEEE-488.2-1992
The above standards de fi ne a syntax for sending data to and from instruments, how an
instrument interprets this data, what registers should exist to record the state of the instrument,
and a group of common commands. The SourceMeter also conforms to this standard:
• SCPI 1996.0 (Standard Commands for Programmable Instruments)
This standard de fi nes a command language protocol. It goes one step farther than
IEEE-488.2-1992 and de fi nes a standard set of commands to control every programmable
aspect of an instrument.
GPIB connections
To connect the SourceMeter to the GPIB bus, use a cable equipped with standard IEEE-488
connectors as shown in Figure 13-1.
To allow many parallel connections to one instrument, stack the connectors. Two screws are
located on each connector to ensure that connections remain secure. Present standards call for
metric threads, which are identi
fi ed with dark-colored screws. Earlier versions have different
screws, which are silver-colored. Do not use these types of connectors on the SourceMeter; it is
designed for metric threads.
Figure 13-1
IEEE-488 connector