How should the OTDR be connected to the fiber optic cable?

How should the OTDR be connected to the fiber optic cable?

• A. With a fusion splice
• B. With an optical mechanical splice
• C. With a direct bare-fiber contact
• D. With a passive optical splitter

Answer: (B)

When testing with an OTDR, you need a clean, low-reflection way to join the test instrument to the fiber under test. An optical mechanical splice provides a quick, reversible method to connect the OTDR’s launch fiber to the fiber being tested by precisely aligning and holding the fiber ends together. This creates a stable joint with minimal insertion loss and reflections, which is essential for accurate trace readings. A fusion splice would permanently join fibers and is more involved than needed for a temporary test. Direct bare-fiber contact would produce large reflections and be unreliable, while a passive optical splitter isn’t a method for making a direct test connection.

When testing with an OTDR, you need a clean, low-reflection way to join the test instrument to the fiber under test. An optical mechanical splice provides a quick, reversible method to connect the OTDR’s launch fiber to the fiber being tested by precisely aligning and holding the fiber ends together. This creates a stable joint with minimal insertion loss and reflections, which is essential for accurate trace readings. A fusion splice would permanently join fibers and is more involved than needed for a temporary test. Direct bare-fiber contact would produce large reflections and be unreliable, while a passive optical splitter isn’t a method for making a direct test connection.