
Chapter 7
Power meter and Source options of the OTDR Modules
Performing the insertion loss measurement
User Manual
770000102/08
101
a
Select the Optical powermeter icon of the mainframe in
Home
page
(on the upper part, on the base options line)
b
In the LTS result page, press
Pow. Reference
>
Jumper Ref.
.
A popup message appears
c
Connect the jumper from the OTDR port to the mainframe power
meter, and then press
OK
The reference is performed automatically.
A popup message appears once done. Press any key to continue
The reference levels are stored into the unit, and have been automati-
cally filled into the setup.
Measurements
on the fiber
under test
Once the references have been performed on both units:
1
After a reference in loopback mode, disconnect the jumper from the
powermeter port on the T-BERD/MTS (1) and the jumper from the
Source port on the T-BERD/MTS (2).
After a reference in Side by side mode, disconnect the bulkhead
connector and keep the jumpers connected to the Source and
Powermeter ports.
2
Connect the jumpers to the fiber under test using the appropriate
method (ex. keying mechanism for FC/PC types).
3
On MTS / T-BERD (1) select
Laser On
to activate the light source.
Measurement using a mode conditioner
To perform an Insertion Loss measurement with a Source that is
compliant to IEC 61280-4-1 Ed2 Standard on encircled flux, it is recom-
mended to use a mode conditioner after the OTDR Source port.
Once the Source on T-BERD/MTS (1) and the Powermeter on T-BERD/
MTS (2) are referenced in loopback or side-by-side mode:
1
Connect the Multimode source (1) to the mode conditioner
Fig. 63
Measurement of the fiber under test
OTDR Module:
Source port
Mainframe
Power meter
port
Fiber Under Test
T-BERD/MTS (1)
T-BERD/MTS (2)
Jumper
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