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Keysight Technologies
N77-Series Attenuators



                                                           Data Sheet




              N7751A 1-Channel Optical Attenuator and Power Meter
              N7752A 2-Channel Optical Attenuator and Power Meter
              N7761A 1-Channel Optical Attenuator
              N7762A 2-Channel Optical Attenuator
              N7764A 4-Channel Optical Attenuator
              N7766A 2-Channel Multimode Optical Attenuator
              N7768A 4-Channel Multimode Optical Attenuator
Introduction

     The Keysight Technologies, Inc. N775xA and N776xA series compact multi-channel attenuators and power
     meters are a new class of remote controlled fiberoptic instruments for optical transceiver and network
     integration test. High setting speed of attenuation and power as well as power measurement capability,
     combined with USB, LAN and GPIB interfaces provides increased throughput and operational efficiency to
     meet today's challenges in manufacturing.


     Operation Modes
     All attenuators feature both attenuation mode and power control mode.

     In attenuation mode, the calibrated value of attenuation in dB can be set. The attenuation can be changed
     at up to 1000 dB/s or the rate can be set to values in the range 0-1000 dB/s for single-mode and 0-80dB/s
     for multimode units.

     The power control functionality allows you to set the power level at the attenuator output. The instrument
     uses the feedback signal from a photodiode after a monitor tap, both integrated in the instrument, to set
     the desired power level at the output of the module (Figure 1 and Figure 2).

     When the power control mode is enabled, the module automatically corrects for power changes at the
     input so that the output power level you set is maintained. Absolute power levels can be set with high
     accuracy after an initial offset calibration for the uncertainties at connector interfaces.
03 | Keysight | N77-Series Attenuators - Data Sheet




        Power measurements                                value pairs can be stored in a table     Key specifications
                                                          to compensate for wavelength-
        In addition, the Keysight N7751A
                                                          dependent effects in the optical         and features
        and N7752A attenuators include two
                                                          path of the set-up. This allows you
        extra optical power meter channels                                                          

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