Model 6220/6221 Reference Manual Remote Operations 10-19
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GPIB interface reference
GPIB bus standards
The GPIB bus is the IEEE-488 instrumentation data bus with hardware and pro-
gramming standards originally adopted by the IEEE (Institute of Electrical and
Electronic Engineers) in 1975. The Model 622x conforms to these standards:
• IEEE-488.1-1987
• IEEE-488.2-1992
These standards define 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 standard below defines a command language protocol. It goes one step fur-
ther than IEEE-488.2-1992 and defines a standard set of commands to control
every programmable aspect of an instrument.
• SCPI 1996.0 (Standard Commands for Programmable Instruments)
GPIB bus connections
To connect the Model 622x to the GPIB bus, use a cable equipped with standard
IEEE-488 connectors as shown in Figure 10-1.
Figure 10-1
IEEE-488 connector
To allow many parallel connections to one instrument, stack the connector. Two
screws are located on each connector to ensure that connections remain secure.
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