Keithley 708B Reference Manual page 59

Section 2: General operation
An instrument that conforms to LXI version 1.2 must have the following:
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All three IP addressing modes: DHCP, Auto-IP, and static IP.
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A web server that has some standard Ethernet configuration parameters:
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A reserved URL in the instrument that provides an xml document that has standard configuration
information. This can be useful for software tools that need to identify the instruments and their
capabilities. The URL is http://<host>:<port>/lxi/indentification.
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An IVI driver for the instrument.
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A LAN Status (fault) indicator.
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VXI-11 discovery protocol.
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LAN reset button or menu option. LXI calls this the LAN Configuration Initialize (LCI).
When the LXI-defined LAN reset is selected, the instrument reverts its LAN settings to a known set of
defaults. The default LAN settings for LXI instruments are:
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LXI Version 1.3 added the requirement of mDNS (multicast DNS) discovery.
Instrument LAN protocols
Raw socket communications
All Keithley instruments that have LAN connections support raw socket communication. This means
that you can connect to the TCP/IP port on the instrument and send and receive commands. There is
no extra protocol overhead above and beyond what TCP gives you. A programmer can easily
communicate with the instrument using Winsock on Windows computers or Berkley sockets on Linux
or Apple computers.
The port number to use for connections differs with instrument models:
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707B and 708B: Port 5025
2-40
IP configuration: IP address, subnet mask, gateway.
Password protection on anything that might change the instrument state.
A control on the web page that flashes an LED or some form of indicator on the front panel of the
instrument. LXI calls this the Device Identification Functionality. This allows you to identify the web
page you are currently looking at with the instrument. This helps you identify a specific instrument
in a rack of similar model instruments.
DHCP and Auto-IP enabled. LXI refers to this as the Auto IP address mode (compared to the
manual address mode, which is fixed or static IP addressing).
Web password is reset to the factory default.
Ping responder enabled.
Dynamic DNS and mDNS enabled.
Models 707B and 708B Switching Matrix Reference Manual
707B-901-01 Rev. A / August 2010