Viavi 4100 Series Parts list manual

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Quick Card
T-BERD®/MTS-2000 Modular Test Set
DWDM OTDR Smart Test Assistant
This quick card describes how to connect to a fiber under test and use the Smart Test Assistant to
configure test setups, run tests, and analyze results on 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 Software
Release V18.7 or greater
•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 patch panel (OPP) or a coupler 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. Press the Home button to display the
Home view.
3. Tap the SMART TEST icon until it is yellow
and highlighted.
4. Select a configuration file:
•Select the EXPRESS configuration file to
setup the T-BERD for 5 second acquisitions to
quickly confirm loss and distance.
•Select the CERTIFICATION configuration file
to setup the T-BERD for 20 second
acquisitions to confirm loss and distance AND
analyze all events (splices, connectors, etc.)
•Tap to select a user configuration file
stored in the /disk/fiber/config folder.
5. Tap to load the configuration and
view the SMART TEST Setup screen.
6. Laser: Select the desired ITU Channel to
test.
7. Distance Unit: Tap the desired unit of
measure for the launch cable.
8. Launch Cable:
a. Tap YES if you are using a Launch Cable.
b. Tap the
icon to enter or measure the
Launch Cable length.
c. If the launch cable length is known, tap
to clear existing text, enter value on
the keypad and tap to return.
d.
To measure the launch cable length, tap
Measure and tap Confirm. The
measured value will auto-populate
when measurement is finished.
Note: The Launch Cable should be
disconnected from the Fiber Under Test
during measurement.
9. Alarms: Choose User for Viavi
recommended Pass/Fail limits.
10. Distance Unit: If you wish to use a
different unit of measure for the test
results, change the unit of measure to the
desired value.
Figure 5: Home Screen
Figure 6: Smart Test Configuration File
Figure 7: Smart Test Setup

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© 2019 VIAVI Solutions Inc.
Product specifications and descriptions in this
document are subject to change without notice.
Run Test:
1. Tap to start the test. After auto-
configuration, the OTDR will perform a
connection check to ensure that the
connection is Good and will test at the
configured wavelength.
2. Results may be displayed in 2 formats: Trace
view or SmartLink view. Tap the
Trace/SmartLink soft key to toggle between
views.
•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 with a red .
The lower display shows each event that
exceeds alarm thresholds.
Tap an event icon and tap the Event View
soft key to show detailed results for the
event.
•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 display.
Tap the Zoom soft key to enable the
following controls:
Toggle between auto zoom and full
trace view.
Expand and contract trace.
Figure 8: Connection Check
Figure 9: SmartLink view
Figure 10: Trace view
3. Repeat steps 1 and 2 for all wavelengths and fibers under test being careful to check and double
check the wavelength to be tested.