Fluke OMNIFiber, User Manual

Page: 75 / 136

OMNIS
CANNER
User Guide
5 - 8
In the ATTENUATION screen, the worst case margin for all pairs is
shown at the top of the screen.
The pairs are displayed in the column on the left side, followed by the
Attenuation in decibels (dB), the Attenuation margin/limit values, and
the frequency. The result for each pair is tagged with a PASS
,
Marginal PASS , Marginal FAIL , or FAIL indicator.
Press (Graph) to display the Attenuation
graph for the highlighted pair. The Attenuation
is displayed for the frequency indicated by the
cursor position.
Press (Pairs) to view Attenuation results
for other pairs.
Press ESC to exit the ATTENUATION screen.
Note
Attenuation always reports the worst dB value regardless of the
Report: setting in the RUN OPTIONS screen.
Return Loss
The Return Loss function measures the uniformity of a cable’s imped-
ance. OMNIS
CANNER
injects a signal into the cable and measures the
reflected signal strength. Return Loss measures the difference between
the transmitted signal delivered to the cable and the reflected signal at
the input port of the cable. The reflected signal is the result of imped-
ance mismatches in the link under test.
In the RETURN LOSS screen, the worst case margin for all near and far
pairs is shown at the top of the screen.
The pairs are displayed in the column on the left
side, followed by the Return Loss in decibels
(dB), the Return Loss margin/limit, and the
frequency. The result for each pair is tagged with
a PASS
, Marginal PASS , Marginal FAIL ,
or FAIL indicator.
Press or to toggle between the