Device Selector - Keysight E4980A User Manual

Overview of Remote Control
GPIB remote control system
Required Equipment
1. E4980A/AL
2. External controller (computer)
Use a personal computer or workstation equipped with the GPIB interface.
You need to install software to control this instrument via the GPIB into the
external controller (for example, HTBasic or Keysight VEE).
3. Other devices (other instruments and/or peripherals that serve your
purpose)
4. GPIB cables for connecting the E4980A/AL, the external controller, and
other devices
Scale of the system you can construct
• You can connect up to 15 devices in a single GPIB system.
• The length of cables to make connections between devices must be 4 m or
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 a system in which the total cable length exceeds 20
m.
• The number of connectors connected to an individual device must be four
or less. If you connect five or more connectors, excessive force will be
applied to the connector part, which may result in failure.
• You can choose the device connection topology from star, linear, and
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 individually set for each system. The
GPIB address must be set to a unique value for each device, and is used to
identify devices on the same system. In the description and sample programs
in this manual, it is assumed that the device selector is set to 717.
Keysight E4980A/AL Precision LCR Meter 223