OMNISCANNER User Guide
6 - 6
NEXT in the cable is the source of the failure
even though the cable’s NEXT response
peaks are less than those of the connection.
By knowing that the connection meets its
performance requirement, the cable is easily
identified as the non-compliant component
of the link.
The following table summarizes the typical
diagnosis process.
NEXT TDNXT exceeds Conclusion
S-Band limits
PASS N/A NEXT of link is within limits
FAIL YES Connection fails. Replace or retermi-
nate. Plug and/or jack can be at fault.
FAIL NO Cable is not within specifications
TDRL
Return Loss is a measure of the amount of reflected energy in a link.
Reflections occur at points of impedance discontinuity, such as connec-
tors, transitions from patch cables to horizontal cables, and impedance
structure within a cable.
Return Loss faults are diagnosed by using the TDRL (Time Domain
Return Loss) function. OMNISCANNER uses TDRL to determine the
amount of Return Loss as a function of distance. TDRL with new S-
Band™ technology (Standard Connector Band technology) can help
you to distinguish between connection faults and cable faults. It assists
you with diagnosis and troubleshooting of Return Loss failures and the
verification of test cables, connectors and plugs.
While the Return Loss graph shows the link test limits and the fre-
quency at which a failure occurred, the TDRL graph displays Return
Loss vs. distance.
To Next Page
Loading...
