How should you connect an optical time domain reflectometer (OTDR) to test a fiber-optic cable?

Connecting an optical time domain reflectometer (OTDR) correctly is essential for accurate testing of a fiber-optic cable. Using an optical mechanical splice is the appropriate method for this connection because it allows for a reliable and consistent link between the OTDR and the fiber under test.

Optical mechanical splicing offers a low-loss connection, helps align the fibers accurately, and minimizes the disruption to the light signal passing through the fiber. This method is effective for ensuring that the OTDR can efficiently measure and analyze the return signals from the fiber, providing valuable information regarding the integrity and performance of the cable.

The other options might not provide the same level of reliability or accuracy. Direct splicing requires careful handling and can introduce complications if not performed correctly. A fiber coupler may not maintain the integrity of the connection needed for optimal OTDR performance, and using a pigtail connector could lead to higher losses or variability in the connection, compromising the test results. Utilizing optical mechanical splicing combines ease of use with effective signal integrity, making it a favorable choice for connecting an OTDR.