6 - 9
OMNISCANNER User Guide
BAD CABLE, GOOD CONNECTION:
The cursor in the Return Loss graph is located at
the worst Return Loss at 110.4 MHz, which is
outside the limit line. The Link failed. Why?
Press to open the TDRL screen to further
review and diagnose the graph.
The Return Loss response from the connector
located at 2 m is well within the S-Bands and
performs significantly better than the require-
ments. The Return Loss in the cable is the source
of the failure even though the cable’s Return
Loss 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 compo-
nent of the link.
The following table summarizes the typical diagnosis process.
Return Loss TDRL exceeds Conclusion
S-Band limits
PASS N/A Return Loss of link is within limits
FAIL YES Connection fails. Replace or
reterminate. Plug and/or jack can
be at fault.
FAIL NO Cable is not within specifications
To Next Page
Loading...
