Agilent Technologies J3972A - Manual (Page 31)

Introduction
Probe Overview
11
Collision. This yellow LED is turned on when LanProbe detects collisions on the
network.
Fault. This yellow LED is turned on when the probe needs to be reset, repaired, or
replaced or when new firmware is downloaded. The Fault LED is normally on
during the power-on self-test, but turns off after a successful self-test or when a
cold or warm start is completed.
Figure 1-3: Front Panel LEDs