GPIB / 488 Interface
GPIB / 488 interface availability for different models:
9120 9121 9122 9123
RS-232 Standard Standard Standard Standard
GPIB / 488 Optional Optional Optional Standard
GPIB (General Purpose Interface Bus) interface is also known as IEEE 488.
The original 488.1 specification defines the mechanical and electrical
characteristics of the interface and its fundamental protocols.
The 488.2 specification defines a minimum configuration, and adds
specifications for a basic set of instrument commands and common data
formats.
In order to communicate with the power supply over GPIB interface, a
GPIB interface card must be placed in the computer.
A GPIB system allows interconnection of instruments and other devices to a
controlling computer.
Here are some specifications of IEEE 488.1:
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Up to 15 devices may be interconnected in a GPIB network
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Configuration of the bus network may be linear or bus
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24 bus lines: 8 data lines, 8 control and management lines, 8 GND
lines
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Data transfer mode: 8-bit parallel
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Handshake: '3 wire handshake'; reception of each data byte is
acknowledged.
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total transmission path length: 20m, or L < 2N
L – total transmission path length
N – number of devices
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Maximum transmission rate: 1 megabyte per second. The actual
data rate is determined by the slowest device.
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Each device connected to the interface must have a unique address
between 0 to 30 (decimal value).
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