What should be done to all connectors before testing?

What should be done to all connectors before testing?

• A. Cleaning
• B. Polishing
• C. Inspecting
• D. Replacing

Answer: (A)

Contaminants on connector end-faces are the biggest source of measurement error when testing optical links. Dust, oils, or residues scatter or absorb light and can alter the actual optical path, leading to artificially high insertion loss, unstable readings, or misleading reflection results. Cleaning removes these particles so the test reflects the true performance of the system, not the surface condition of the connector. Polishing is a manufacturing or repair step used to prepare or restore the end-face, not something you’d do right before a standard test. Inspecting is important to catch obvious damage, but a surface can look clean yet still carry microscopic contaminants that cleaning addresses. Replacing is only necessary if the connector is damaged or unsalvageable; cleaning first ensures you’re testing with the best possible surface.

Contaminants on connector end-faces are the biggest source of measurement error when testing optical links. Dust, oils, or residues scatter or absorb light and can alter the actual optical path, leading to artificially high insertion loss, unstable readings, or misleading reflection results. Cleaning removes these particles so the test reflects the true performance of the system, not the surface condition of the connector.

Polishing is a manufacturing or repair step used to prepare or restore the end-face, not something you’d do right before a standard test. Inspecting is important to catch obvious damage, but a surface can look clean yet still carry microscopic contaminants that cleaning addresses. Replacing is only necessary if the connector is damaged or unsalvageable; cleaning first ensures you’re testing with the best possible surface.