Chapter 3
Launching a reflectometry test and displaying results
Advanced functions in Expert OTDR mode
66
User Manual
700MAN201 Rev. 002
If very close events have created a dead zone preventing the measurement of slope by
the five-cursor method, it is possible to use the two-cursor method. This considers the
difference in level between the cursors.
Before performing one of these measurements, define in the
Setup
menu the splice
detection threshold.
Two points method
To perform a splice measurement by the "two-points" method, display the
Results
page,
then:
1
Place cursor A exactly on the fault, then place cursor B after the splice that you
wish to define.
2
Press the
Analysis
key, then click on
Loss
.
3
Select the function
2 Pt Loss
.
4
Press
Calculate
key.
The splice marker is placed at the point defined by the first (left-hand) cursor and
the result is displayed on the screen. If the fault is reflective, the reflectance value
is also measured and displayed. These results are added to the table of results
.
Five points method
To carry out a splice measurement by the "five points" method:
1
Measure the slope preceding the fault to be measured, then the slope following it.
2
Place the cursor on the fault (between the two sections).
3
Press the
Analysis
key, then click on
Loss
.
4
Select the function
5 Pt Loss
.
Five cursors (A, a, B, b and C) are displayed on the trace.
5
Press
Calculate
key.
The splice event marker is placed on the cursor and the result is displayed on the
trace and in the table of results.
NOTE
If you try to measure a splice on a slope, the measurement is not carried out
and the following error message is displayed: "
Slope found between
two cursors
".
OTDR New IHM rev002.book Page 66 Jeudi, 5. mai 2022 11:50 11
