Verify Connections And Settings; Use Ping To Test The Connection - Keithley 708B Reference Manual

Section 8: Troubleshooting guide

Verify connections and settings

If you are unable to connect to the instrument's internal web page, check the following items:
•
Verify that the crossover cable is in the correct LAN port on the instrument. Do not connect to one
of the TSP-Link ports.
•
Verify that the crossover cable is in the correct port on the computer. The Ethernet port of a
laptop may be disabled while the computer is in a docking station.
•
Verify that the correct Ethernet card configuration information was used during the setup
procedure.
•
Verify that the computer's network card is enabled.
•
Verify the instrument IP address is compatible with the IP address on the computer.
•
Verify the instrument subnet mask address is the same as the computer's subnet mask address.
•
Turn the instrument power off, and then on.
•
Reboot the computer.

Use Ping to test the connection

Ping is a computer network administration utility that you can use to test whether a particular host can
be reached across an Internet Protocol (IP) network. It also measures the round-trip time for packets
sent from the local host to a destination computer, including the local host's own interfaces.
To run Ping:
1. From the Windows Start menu, type cmd in the Run box or Search box. The Command window is
displayed.
2. At the > prompt, type ping followed by the IP address. For example:
ping 169.254.52.51
Beware that some network devices, especially LXI instruments, can disable the ping response to
prevent denial of service attacks. This prevents hackers from pinging your instrument indefinitely,
which causes the instrument to become so busy it cannot respond to a web browser or instrument
driver.
If you cannot ping an instrument from the computer, you will not be able to communicate with the
instrument. You will need to check the LAN settings from the front panel of the instrument to see if
they match the configuration of your network.
If you can ping your instrument, you should be able to bring up the web page in the instrument from a
browser by typing the IP address in the address (URL) field.
8-6
Models 707B and 708B Switching Matrix Reference Manual
707B-901-01 Rev. A / August 2010