The Keysight N3977A Handheld Automated Optical Attenuator is a high-end, user-friendly precision instrument for field-testing of fiber optical systems featuring very high productivity, power handling of up to +23dBm, return loss of less than -40 dBm and low wavelength dependence.

robust, rugged constructioneasy to learn and usehighly functionalpractical cases to protect instruments in transit also available

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