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Appendix A
Operation of the GPIB
© National Instruments Corporation
A-7
GPIB-130 User Manual
Configuration Requirements
To achieve the high data transfer rate that the GPIB was designed for, the physical distance
between devices and the number of devices on the bus are limited.
The following restrictions are typical.
•
A maximum separation of four meters between any two devices and an average separation of
two meters over the entire bus.
•
A maximum total cable length of 20 m.
•
No more than 15 devices connected to each bus, with at least two-thirds powered on.
Bus extenders are available from National Instruments for use when these limits must be
exceeded.
Related Document
For more information on topics covered in this section, consult ANSI/IEEE Standard
488.1-1987, IEEE Standard Digital Interface for Programmable Instrumentation.