Viavi 4100 Series Stücklistenhandbuch

VIAVI Solutions

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.

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

VIAVI Solutions

(+1 844 468 4284)

To reach the VIAVI office nearest you,

visit viavisolutions.com/contacts.

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.

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