Viavi OTDR 41 A Series, Руководство пользователя

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Chapter 3 Launching a reflectometry test and displaying results
Advanced functions in Expert OTDR mode
62 User Manual 700MAN201 Rev. 002
4 A marker and an event number are displayed at the position of the cursor and
a measurement is carried out on the event.
Measurement of slope before the marker starts just after the previous event (or at
the end of the dead zone at the beginning of the fiber); measurement of slope
after the marker stops just before the next marker or at the end of the fiber.
Hints on the positioning of markers
• Do not add markers after a manual measurement, as all the results will be recal-
culated automatically by the instrument.
• If two markers are too close together, they will appear on the trace and the table
but no measurement will be carried out on the second marker: to obtain results
for this marker, a manual measurement is necessary.
• If you press the key when the cursor is very close to a marker, the latter will
be deleted.
Deleting events
To delete an event, move the cursor onto the event and press the key . The event
selected will be deleted and a complete measurement, without this event, is carried out.
Deletion of events can cause incorrect measurement results.
Manual measurements
As soon as you have made an acquisition, with or without automatic measurement, you
can make manual measurements on any event on the trace by means of the cursors A
and B, in association with the functions of slope, detection of splice and calculation of
ORL.
The manual measurements are accessible in the Results page, after pressing the keys:
Analysis .
Measurements of slope
To make a manual measurement of slope, press the R
ESULTS
button to call up the trace
and then:
OTDR New IHM rev002.book Page 62 Jeudi, 5. mai 2022 11:50 11