How should connectors be protected to prevent contamination during installation?

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Contamination on connector end faces is a primary cause of insertion loss and degraded performance. The best practice is to keep connectors protected until they’re mated. Use protective caps on all connectors, maintain a clean work environment, and handle components carefully to avoid touching the end faces. When a connector isn’t in use, store it in a sealed container and cap any exposed ends. This creates a barrier against dust, oils, and moisture and minimizes contamination during installation. Leaving connectors exposed to air invites particulates; cleaning with water alone isn’t sufficient and can leave residues; taping connectors can leave adhesive and isn’t a proper protective method.