Viavi T-BERD/MTS-2000 Parts list manual

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Quick Card
T-BERD®/MTS-2000 Modular Test Set
FTTA OTDR, Cell Tower Maintenance
This quick card explains how to connect to a fiber under test, configure Fiber to the Antenna (FTTA)
OTDR test setups, run tests, and analyze results with a VIAVI T-BERD/MTS-2000 equipped with a 4100-
series OTDR module to troubleshoot cabling component problems such as fiber breaks or high loss and
reflective defects (dirty connectors, fiber mismatches, misalignment, macro-bends/kinks, etc.)
Equipment Requirements:
•T-BERD/MTS-2000 equipped with the following:
oFiber Optics Software Release V16.22 or greater
oE4100 Series OTDR Module
oSoftware options for FTTA OTDR and SmartLink
Mapper (SLM) icon-based OTDR results
•Fiber optic cleaning and inspection tools
•20-meter fiber optic patch cord (Launch Cable) with
connectors that match the OTDR Port and Fiber
Under Test (SC UPC, SC APC, LC UPC, etc.)
•Optical Coupler to connect Launch Cable to BBU
Jumper Cable or Trunk Cable
The following information is required to complete the procedure:
•Type of Fiber (Multimode or Single Mode)
•Type of Connectors (SC UPC, SC APC, LC UPC, etc.)
•Tower architecture:
oIs there a BBU jumper cable?
oIs there an RRU jumper cable?
•RRU and BBU/Base Station IDs
•Fiber Code (1-Rx, 1-Tx, …, 24-Tx)
•Distance unit (feet or meters)
Fiber Inspection Guidelines:
Inspect and clean (if necessary) both sides of every connection being
used (bulkhead connectors, patch cords, and OTDR port) prior to
reconnection for each test. Using the P5000i or FiberChek Probe:
•Focus fiber on the screen. If dirty, clean the connector
•If it appears clean, run inspection test.
•If it fails, clean fiber and re-run inspection test. Repeat until it
passes.
Figure 1: FiberChek Probe
Figure 2: Image of Clean Fiber

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Connect to Fiber Under Test (FUT):
All fibers and connectors should pass fiber inspection prior to connection, as described on page 1. The
OTDR may be connected to the FUT as follows:
Figure 3: Tower Architecture with BBU Jumper
Figure 4: Tower Architecture, no BBU Jumper
1. Inspect and clean the OTDR port on top of the test set.
2. If the interface to the FUT is the BBU Jumper or Trunk Cable, connect the cable to an optical
coupler with the same connector type.
3. Inspect and clean the FUT connected to the coupler or OPP.
4. Inspect and clean fiber end face of the Launch Cable.
5. Connect the Launch Cable to the OTDR port.
6. Inspect and clean the other fiber end face of the Launch Cable.
7. Connect the Launch Cable to coupler or OPP leading to the RRU.

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Launch Test:
Figure 5: Home View
Figure 6: File Explorer
1. Press the ON/OFF button to turn on the test set.
2. If files are to be saved, press the FILE Button and tap the results folder. Otherwise, proceed
to step 4.
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 desired (Multimode or Single Mode) FTTA OTDR icon until it is selected and
highlighted yellow.
6. Press the SETUP button. If an FTTA_RRU_Maintenance configuration file has already been
loaded, proceed to step 9.
7. Tap the Load Config soft key. Select FTTA_RRU_Maintenance.SM-OTDR for single mode
fiber, or FTTA_RRU_Maintenance.MM-OTDR for multimode fiber.
8. Tap the Load as FTTA Config soft key.
9. Tap the Analysis soft key:
•Set BBU Jumper to Yes if there is a BBU Jumper Cable between the Launch Cable and OPP;
Set BBU Jumper to No if the Launch Cable is directly connected to the OPP.
•Set RRU Jumper to Yes if there is a Junction Box/OPP at the top of the tower between the
Trunk Cable and RRU; Set RRU Jumper to No if there is no Junction Box or no RRU Jumper.
•Leave other settings at default values.
•Tap the Analysis title bar to display the Link soft key.
10. Tap the Link soft key:
•Set Base Station ID to the Base Station or BBU Identifier.
•Set RRU ID to the RRU Identifier or sector (Alpha, Beta, Gamma).
•Set Fiber Code to the fiber number and polarity using the right ( < ) and left ( > ) arrow
buttons.
•Set Change Fiber Nbr to Increment.
•Set Distance Unit to Feet or Meters.

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© 2018 VIAVI Solutions Inc.
Product specifications and descriptions in this
document are subject to change without notice.
Run Test:
1. Press the RESULTS button.
2. Press 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. If the Connection is Bad, repeat steps 1 through 7
on page 2.
3. The OTDR will perform acquisitions at two wavelengths and the trace file will be saved to disk. Results may
be displayed in 3 different formats: Trace view, SmartLink Summary View, or SmartLink Event View.
Tap the Trace/SmartLink soft key , to toggle between Trace view and SmartLink views.
Tap the soft key to toggle between the SmartLink Summary view and SmartLink Event View:
a. Trace view: Results for each wavelength are shown in different
colors in the top section of the display. Each event is listed in
the lower section of the display. Any events that violate
pass/fail thresholds for loss or reflectance are shown in RED.
Use the right and left arrow button to Toggle between results
for each wavelength. Tap the Zoom soft key , to enable
zoom controls with the following buttons:
•Toggle between automatic zoom and full trace view
•Expand and contract trace.
b. SmartLink Summary view: The FUT is displayed as a series of
icons representing events (connectors, splices, bends, etc.). The
center of the display shows summary results per wavelength 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 thresholds.
c. SmartLink Event view: The FUT is displayed as a series of labels
icons representing each event in the trace:
•BBU: Connection (coupler) between launch cable and BBU
Jumper Cable
•BOT TWR: Optical Patch Panel at bottom of tower
•TOP TWR: Junction Box/Patch Panel at Top of tower
•RRU: End of RRU Jumper Cable
Any events that violate pass/fail thresholds for loss or
reflectance are shown in RED. Tap on any event to display
details in the lower display.
Figure 3: Trace view
Figure 4: SmartLink Summary View
Figure 5: SmartLink Event View
4. Repeat steps 2 and 3 for all Fibers under test.