Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 399 / 700

Chapter 11: The OptiFiber Pro OTDR Module
OTDR Results
363
How to Use the Measurement Cursor on the OTDR Trace
You can use the cursor on the OTDR trace to measure distance
and loss along the cabling. As you move the cursor, the tester
calculates averages around the mark and cursor locations. This
decreases the effects of noise on measurements.
To use the measurement cursor
Refer to Figure 149:
1
Tap the yellow circle at the top of the cursor (  ) so that
MARK
shows.
2
While
MARK
shows, use one of these methods to move the
cursor to the point where you want to start the measurement:
 Drag the cursor with the yellow circle (  ).

Tap or press and hold or (

).
 To move the cursor to an event, tap or next to
Events
(

).
3
Tap
MARK
, then while
UNMARK
shows, move the cursor to
the point where you want to end the measurement.
Note
If UNMARK and the cursor controls do not show,
tap the yellow circle.
These indicators show on the screen:


dB =
: The difference in the power levels (in decibels)
between the start and end of the green measurement bar.


m
or

ft =
: The distance between the start and end of
the green measurement bar.


dB/km
or

dB/kft =
: Power loss (in decibels) that would
occur over 1 km (1000 m) or 1 kft (1000 ft) of fiber. The
tester uses the loss between the start and end of the
green measurement bar to calculate this value.
-continued-