9-4 Remote Operation Model 6487 Reference Manual
Press the RANGE keys to scroll through the available RS-232 settings. To make changes
to a setting, press the right cursor key and then use the RANGE keys to select and modify
the value as desired. Press ENTER to save the changes and move to the next menu item
(pressing EXIT also saves the changes but leaves the menu). At the last menu item,
ENTER will save and exit the menu.
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. The Model 6487 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 instru-
ment 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 the Model 6487 to the GPIB bus, use a cable equipped with standard IEEE-488
connectors as shown in Figure 9-1.
Figure 9-1
IEEE-488 connector
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