Viavi T-BERD/MTS-4000 v2 Parts list manual

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Quick Card
T-BERD®/MTS-2000 Modular Test Set
DWDM Expert OTDR
This quick card describes how to connect to a fiber under test, configure Expert OTDR test setups, run
tests, and analyze results with a VIAVI T-BERD/MTS-2000 equipped with a 4100-series DWDM OTDR
module.
The DWDM OTDR is meant to test a specific wavelength on a live Dense Wavelength Division
Multiplexed (DWDM) network. Care must be taken to select and test the correct wavelength.
Equipment Requirements:
•T-BERD/MTS-2000 equipped with:
oSoftware Release V18.0 or greater
oESMARTACQ Smart Acquisition option
(recommended)
•E4100 Series DWDM OTDR Module
(E41DWDMC-PC or E41DWDM-APC)
•Fiber optic cleaning and inspection tools
•Launch Cable (minimum 20-meter Fiber optic
patch cable)
•Optical Coupler to connect Launch Cable to
fiber under test
Figure 1: Equipment Requirements
The following information is required to
complete the test:
•Type of Connectors (SC UPC, SC APC, LC)
•Distance unit (feet, meters, miles, kilometers)
•DWDM Wavelength to be tested
Figure 2: E41DWDMC-APC OTDR Module
Fiber Inspection Guidelines:
•Use the VIAVI P5000i or FiberChek Probe
microscope to inspect both sides of every
connection being used (OTDR Port, Launch
Cable, bulkhead connector, patch cables, etc.)
•Focus the fiber on the screen. If dirty, clean
the connector.
•If it appears clean, run inspection test.
•If it fails, clean the fiber and re-run inspection
test. Repeat until it passes.
Figure 3: Inspect Before You Connect (IBYC)

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Connect to Fiber Under Test (FUT):
All fibers and connectors should be inspected and clean prior to connection, as described on page 1.
The OTDR may be connected to the FUT via an optical coupler, optical patch panel (OPP) or a DWDM
MUX if testing a live DWDM System:
Figure 4: Connecting to Fiber Under Test
The DWDM OTDR is meant to test a specific wavelength on a live DWDM network and
care must be taken to select and test the correct wavelength.
1. Inspect the OTDR port on top of the test set.
2. If the interface to the FUT is a patch cord, connect the patch cord to an optical coupler with the
same connector type.
3. Inspect the FUT connected to the coupler or OPP port.
4. Inspect the fiber end face of the Launch Cable.
5. Connect the Launch Cable to the OTDR port.
6. Inspect the other fiber end face of the Launch Cable.
7. Connect the Launch Cable to the coupler or OPP port.
8. Disconnect or disable the far end SFP on this wavelength.

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Setup Test:
1. Press the ON/OFF button to turn on the test
set.
2. If files are to be saved, tap the FILE Button
and tap the results folder to view the File
Explorer. Otherwise, proceed to step 5.
3. Tap the Create Directory soft key, enter a
name for your new folder, and tap the Enter
key. All trace files will be saved to this
directory.
4. Press the HOME button to display the Home
Screen.
5. Tap the EXPERT OTDR icon until it is yellow
and highlighted. Once selected the icon will
be relabeled “Singlemode OTDR”
6. Tap the SETUP button to view setup
parameters.
7. In the Acquisition setup:
a. Select your desired Unit (THz for
Frequency, nm for Wavelength, Channel
for Channel Number) and select the
desired DWDM Channel.
b. If you do not have the enhanced
ESMARTACQ license, set Acquisition Mode
to Auto
c. If you do have the enhanced
ESMARTACQ license, set Acquisition
Mode to SmartAcq
8. Press the Top Menu soft key to return to the
setup screen.
9. Before proceeding, confirm that you are
connected to the correct port on the DWDM
Mux, that the OTDR is configured for the
correct wavelength, and that the fiber is not
lit on that wavelength.
Figure 5: File Manager
Figure 6: Home Screen
Figure 7: Channel selection
Figure 8: Acquisition Mode

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Product specifications and descriptions in this
document are subject to change without notice.
Run Test:
1. Tap the START/STOP button to start the test.
After auto-configuration, the OTDR will
perform a connection check to ensure that
the connection is Good. After the connection
check, the OTDR will test at the configured
wavelength.
2. Results may be displayed in 2 different
formats: Trace view or SmartLink view. Tap
the Trace/SmartLink soft key to toggle
between views.
a. Trace view: Graphical result for the
wavelength are shown in the upper
display. Use the following controls to
change the display:
•Toggle between single event and
multiple event view in lower screen.
•Tap the Zoom soft key to enable the
following controls:
▪Toggle between auto zoom
and full trace view.
▪Expand and contract trace.
b. SmartLink view: The FUT is displayed as
a series of icons representing each event
(mux/demux, connector, splice, etc.).
•The center display shows summary
results for the entire span.
Acquisitions for which all events are
acceptable are marked with a green
check . Acquisitions with events
that exceed pass/fail thresholds for
loss or reflectance are marked .
•The lower display shows each event
that exceeds alarm thresholds.
•Tap an event icon and tap the Event
View soft key to show results for the
event.
3. Repeat steps 1 and 2 for all wavelengths and
fibers under test being careful to check the
wavelength to be tested.
Figure 9: Acquisition in Progress
Figure 10: Trace View
Figure 11: SmartLink View