This datasheet describes the Keysight N4917BACA platform for testing optical receivers used in 10G, 25G, 40G, and 100G Ethernet systems and related multi-source agreements. Supported interfaces include LR, ER, SR, LR4, ER4, SR4, CLR4, CWDM4, 4WDM, and PSM4 configurations. The system integrates a bit-error-ratio tester, stress generator, optical reference transmitter, tunable or fixed laser, attenuator, and sampling oscilloscope to create repeatable stressed optical eyes. Automated calibration covers extinction ratio, vertical eye-closure penalty or stressed-eye closure, jitter components, optical modulation amplitude, and eye-mask conditions. Jitter-tolerance tests, adjustable limits, remote instrument control, DUT automation, and compliance reporting simplify standards-based receiver sens

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