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Troubleshooting the LAN Connection
Troubleshooting the Initial Connection
Verify the logic analyzer performance
The logic analyzer performance verification (self-test) is divided into
two sections. The first section tests the physical connections such as
the cable and termination. The second section tests the internal
functions of the LAN interface. When both sections of the self-test have
finished, a status message appears in the LAN Test field. The status
message indicates whether the test passed, if a failure occurred, and
which section failed.
The physical connection test depends on the LAN topology used. If
ThinLAN is used, then a test transmission signal is transmitted over the
LAN. If a reply is received, then the physical connection is considered
good. If EtherTwist (10Base-T) is used, then the logic analyzer will
listen for the heartbeat signal from the LAN. If a heartbeat is received,
then the physical connection is considered good.
The second section is tested using in ternal loopback features of the
LAN hardware. Transmitted packets are looped back to the receive
circuit of the LAN board. When the looped-back packets are received,
they are processed like a packet received from a remote client or
server. If the looped-back packet is recognized and processed, then the
LAN board and the LAN software are considered good.
Perform the following check before beginning the procedure.
❏Check all network cables and connectors. Verify that all cables are
properly connected.