2: General operation Model 2450 Interactive SourceMeter® Instrument
2-56 2450-901-01 Rev. B/September 2013
LAN status LEDs
The figure below illustrates the two status light emitting diodes (LED) that are located at the top of the
LAN connection port of the instrument. The table below the figure provides explanations of the LED
states.
Figure 38: LAN status LED
When lit, indicates that the LAN port is connected to a 100 Mbps network
When blinking, indicates that the port is receiving or sending information
If neither LED is lit, the network is not connected.
LAN interface protocols
You can use one of following LAN protocols to communicate with the Model 2450:
• Telnet
• VXI-11
• Raw socket
You can also use a dead socket termination port to troubleshoot communication problems.
You can only use one remote interface at a time. Although multiple ethernet connections to the
instrument can be opened, only one can be used to control the instrument at a time.
The port numbers for the LAN protocols and dead socket termination are listed in the following table:
LAN protocols
Port number Protocol
23 Telnet
Raw socket connection
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. A
programmer can easily communicate with the instrument using the Winsock API on computers with
the Microsoft
®
Windows
®
operating system or using the Berkeley Sockets API on Linux
®
or Apple
®
computers.
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