Agilent Technologies HSSI WanProbe J3916A - Manual (Page 90)

Installation
Verifying the Installation
70
HSSI Troubleshooting
Before monitoring any data, the connection between the network and the probe
must be verified as reliable. The physical medium between network devices
should also be checked. Simple problems with the connection or the physical
layer configuration can prevent or skew more sophisticated traffic monitoring.
Refer to the following tips to help you prevent these problems:
z Learn about the format of the bit stream before you configure the probe. For
example, are binary ones represented as marks or spaces or is the data
inverted?
z Cable length can affect the ability of the probe to maintain clock
synchronization. Verify that the cables are not too long.
z Is the DCE connected to the port 2 connector? If the cables are reversed, the
probe will not function.
If the Clock LED does not turn on, verify that the cables are connect correctly as
described in “Connecting to a HSSI System (In-Band)” on page 56 and verify that
all of the equipment is functioning properly.
The most common cause for failure is a bad connection at the probe. The red fault
LED should not be on while the probe is operational.