Model 2461 Interactive SourceMeter® Instrument Reference Manual
Section 2: General operation
2461-901-01 A/November 2015
2-67
LAN status LEDs
The figure below illustrates the two status light emitting diodes (LED) that are on the LAN port of the
instrument. The table below the figure provides explanations of the LED states.
Figure 47: LAN status LEDs
1 When lit, indicates that the LAN port is connected to a 100 Mbps network
2 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 2461:
•
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
1024
VXI-11
5025
Raw socket
5030
Dead socket termination
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.