Chapter 5
Launching a reflectometry test and displaying results
Advanced functions in OTDR Expert mode
56
User Manual
770000102/08
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 (with the
Set Event
key) after a manual
measurement, as all the results will be recalculated 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
Set Event
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
Set
Event
key. The event selected will be deleted and a complete measure-
ment, 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 func-
tions of slope, detection of splice and calculation of ORL.
The manual measurements are accessible in the
Results
page, after
pressing the keys:
Advanced
, then
Manual Measurement
.
Measurements of
slope
To make a manual measurement of slope, press the
R
ESULTS
button to
call up the trace and then:
1
Place the cursor A at the beginning of the section of the trace where
the slope is to be measured.
2
Place the cursor B at the end of this section.
3
Press the
Advanced
key, then the
Manual
key, then select
Slope
.
4
Press validation key (
or
E
NTER
) : the slope of the specified
trace section is displayed.
MTS2100 4100 Module US rev08.book Page 56 Jeudi, 1. août 2013 1:43 13