
Chapter 4
Configuring the reflectometry test
Configuring the test in OTDR Expert
User Manual
770000102/08
27
Scatter coefficient
User
Selects for each wavelength, the backscatter coeffi-
cient of -99 dB to -50 dB by increments of 0.1dB.
Modification of the backscatter coefficient K changes
the measurements of reflectance and ORL.
Auto
Backscatter coefficients are selected automatically for
each wavelength.
In Multimode, two predefined scatter coefficients are available:
–
Generic 50
: 850 MM - > -66.3 dB
1300 MM -> -73.7 dB
–
Generic 62.5
: 850 MM -> -66.1 dB
1300 MM -> -70.3 dB
The default values are given in the paragraph
Distance Unit
Define the unit of the distances displayed:
km, kfeet, miles, meter, feet.
Results on trace
None
the trace alone
All
the trace with results and markers.
Graphics
the trace with markers only.
If
All
or
Graphics
is selected, the reflectometry trace is displayed with a
dotted vertical line set on the end of launch cable
(if the Launch
Cable is defined in the
S
ETUP
menu) and a dotted vertical line on the end
of fiber
.
Detection
parameters
Otdr Connector Measurement
This parameter allows to choose if a measurement of the front connector
must be performed when acquisition is launched.
No
In the results table, the first line corresponds to the
first event detected.
Yes
In the results, the first result corresponds to the front
connector measurement, at 0 meter (estimated
value).
Splice
Select if a level of detection for splice must be defined.
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