OTDR Series e-Manual, D07-00-076P-RevC00 Page 37 of 107
2, 4, 6, 8, 12, 24, 48, 72, 144 or greater fiber counts
• Outer Jacket can be of a variety of materials
• Usually longer runs and can be terminated with almost any style of connector
Ribbon
• Commonly used in LAN and PON applications with MTP/MPO connectors
6.6.2 Fiber Patchcord
A fiber patch cord is a piece of fiber cable that is used to connect the OTDR to the fiber under
test. In a typical installation, fibers comprising the incoming cable will be “broken out” and
terminated in a patch panel or wiring closet. One end of the patch cord is usually connected to
the OTDR while the other end is progressively moved along the patch panel as measurements
are made on each fiber.
The patchcord plays a critical role in fiber measurements and users should ensure that a high
quality patchcord is always used, because this can and will have profound performance on test
results and traces.
Factors affecting the choice of patchcord include:
• Fiber type – singlemode, multimode or ribbon
• Connector type (ST, SC, FC, LC, E2000, MTP/MPO, etc.)
• Dead-zone requirements (Refer to Section 4.2) Back reflection performance
• Insertion Loss
• Durability and Longevity
• Bend Limitation
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