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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