Scale Of System You Can Construct; Device Selector - Agilent Technologies E5071C Manual

E5071C
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External controller (PC or workstation that can be connected to LAN
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and Agilent I/O Library is installed into)
Other devices (other instruments and/or peripherals that serve your
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purpose)
GPIB cables
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Scale of system you can construct

You can connect up to 15 devices in a single GPIB system.
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The length of cables to connect between devices must be 4 m or
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less. The total length of connecting cables in a single GPIB system
must be 2 m × the number of connected devices (including the
controller) or less. You cannot construct the system in which the
total cable length exceeds 20 m.
The number of connectors connected to an individual device must be
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4 or less. If you connect 5 or more connectors, excessive force is
applied to the connector part, which may result in failure.
You can choose the device connection topology from star, linear, and
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combined. Loop connection is not supported.

Device selector

The device selector is a unique value assigned to each device that is used
by the controller to select the control target (to send/receive messages)
among devices connected on the GPIB remote control system.
The device selector consists of a select code (usually, 7) and a GPIB
address. For example, when the select code is 7 and the GPIB address is
17, the device selector is 717. The select code must be set for each
system. The GPIB address must be set to a unique value for each device,
Programming
963