Remote Operation 12-5
GPIB operation and reference
GPIB bus standards
The GPIB bus is the IEEE-488 instrumentation data bus with hardware and programming
standards originally adopted by the IEEE (Institute of Electrical and Electronic Engineers) in
1975. Model 6514 conforms to these standards:
• IEEE-488.1-1987
• IEEE-488.2-1992
This standard defines 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.
• SCPI 1996.0 (Standard Commands for Programmable Instruments)
This standard defines a command language protocol. It goes one step further than
IEEE-488.2-1992 and defines a standard set of commands to control every programmable aspect
of an instrument.
GPIB bus connections
To connect Model 6514 to the GPIB bus, use a cable equipped with standard IEEE-488 con-
nectors as shown in Figure 12-1.
To allow many parallel connections to one instrument, stack the connector. Two screws are
located on each connector to ensure that connections remain secure. Current standards call for
metric threads, which are identified with dark-colored screws. Earlier versions had different
screws, which were silver-colored. Do not use these types of connectors on Model 6514, because
it is designed for metric threads.
Figure 12-1
IEEE-488 connector
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