Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 393 / 700

Chapter 11: The OptiFiber Pro OTDR Module
OTDR Results
357

MAX LIMIT
: The maximum loss allowed by the selected test
limit for each wavelength the tester used.
N/A
shows if there
is no test limit for the measurement.

MARGIN
: The difference between the limit and the measured
loss for each wavelength the tester used. Margin is negative if
the loss exceeds the limit.
N/A
shows if there is no test limit
for the measurement.
 Tap to see help for this screen.

To see details for the event before or after this one, tap or
next to
Events
.

The
Min/Max
control shows if the test limit has a minimum
and maximum value for the measurement. Tap the control to
see the values. Most industry-standard limits do not have
minimum values.

SEGMENT ATTENUATION
: This tab shows the attenuation
coefficient of the fiber segment before the event. This is the
attenuation per unit of length for the segment. This value
shows as
N/A
if the tester could not measure it accurately.
This can occur for short segments or if the connector before
the segment has too much tailing.

REFLECTANCE
: Reflectance is the return loss for one event. It
is the ratio of the light reflected at one point on the fiber to
the light that gets to that point from the source. Reflectance
values are in units of negative decibels. A smaller (more
negative) reflectance value shows that less light is reflected
back to the source. For example, a reflectance of -45 dB shows
for a good multimode connection. A reflectance of-20 dB
shows for a bad multimode connection that reflects more
light back to the OTDR.
Reflectances that exceed the measurement range of the tester
show a ">" (greater than) symbol. If any reflection shows ">",
ORL shows "<" (less than).