About Measurements That Show "<" And; Hdr Otdr Trace - Fluke Versiv Series Technical Reference Handbook

Versiv Series Cabling Certification Product Family
Technical Reference Handbook
Reflectance measurements are affected by the
backscatter value you enter on the TEST SETUP
screen.
About Measurements that Show "<" and ">"
In some situations, measurements show with a "<" or ">" (less
than or greater than) symbol. This occurs if the fiber is too long,
the signal is weak, events are very close together, or a
measurement is beyond the range of the tester.

HDR OTDR Trace

To see the OTDR trace, tap TRACE on the OTDR results screen.
Figure 174 shows an example of an OTDR trace.
The decibel scale shows the level of backscatter. The tester

sets the backscatter level at the start of the trace to
approximately 0 dB.
The measurement cursor. To measure loss and distance, tap

the yellow circle so that MARK shows, drag the cursor to the
start of the measurement, tap MARK, then drag the cursor to
the end of the measurement. See "How to Use the
Measurement Cursor on the OTDR Trace" on page 449.
When the cursor is on an event, this area shows the event

type. See Table 17 on page 432. The text is green if the event
passed, red if the event failed, or black is there is no limit for
measurements. The pass or fail status is for the wavelength
shown. The event type does not show after you tap MARK to
use the measurement cursor.
 Tap
444
to see help for this screen.
Note