VIAVI Solutions
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:
o
Fiber Optics Software Release V16.22 or greater
o
E4100 Series OTDR Module
o
Software 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:
o
Is there a BBU jumper cable?
o
Is 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
