An optical transceiver is a compact device that functions as both transmitter and receiver, converting electrical signals to optical signals and back. It is widely used in SONET/SDH, Gigabit Ethernet, and Fibre Channel networks. To ensure compliance with performance specifications, manufacturers must conduct essential tests on each unit. This application note explains how the VIAVI MAP‑200 platform is used to verify two key parameters: transmitter optical power and receiver sensitivity. Accurate testing of these characteristics is critical to ensuring reliable operation in modern optical communication systems.

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