Gpib - Keithley 708B Reference Manual

Models 707B and 708B Switching Matrix Reference Manual
Connecting multiple USB instruments to the computer
The most convenient way to connect USB instrumentation to the computer is to plug a USB cable
directly from the instrument to the computer. If you have more than one USB instrument or have other
USB devices, such as printers, keyboards, and mice, you might not have enough USB connectors on
the computer.
To gain more ports, you can use a USB hub or add more USB controller cards if you have available
PCI or PCI Express slots.
There are two types of USB hubs, either of which can be used with Model 707B or 708B:
•
Bus Powered: This type of hub draws its power from the USB bus and can only supply 100 mA
(USB 2.0) per port.
•
Self Powered: This type of hub has an external power supply and can supply up to 500 mA per port
(USB 2.0).
USB VISA identifiers
The USB identifiers to communicate with your Keithley instrument using VISA are:
•
707B: USB0::0x05E6::0x707B::[serial number]::INSTR
•
708B: USB0::0x05E6::0x708B::[serial number]::INSTR
Where:
•
USB0: USB interface
•
0x05E6: The Keithley vendor ID (assigned to Keithley Instruments by the USB.org)
•
707B or 708B: Instrument model number
•
[serial number]: The serial number of the instrument (the serial number is on the rear panel)
•
INSTR: Use the USBTMC protocol

GPIB

This section contains information about GPIB standards, connections, and address selection.
GPIB standards
The GPIB 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
instrument is IEEE Std. 488.1 compliant and supports IEEE Std. 488.2 common commands and
status model topology.
GPIB quick start
Install the GPIB driver software
Check the documentation for your GPIB controller for information on where to acquire drivers. We
also recommend that you check the vendor's website for the latest version of drivers or software.
It is important to install the drivers before the hardware so that the incorrect driver does not get
associated with the hardware.
707B-901-01 Rev. A / August 2010
Section 2: General operation
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