Keysight / Agilent 81534A Return Loss Module

Keysight / Agilent 81534A Return Loss Module

This HP / Agilent 81534A Return Loss Module is used and in excellent condition. Optical Interface: PC.

This instrument includes the standard Agilent optical interface (View Photo). The Agilent 81000xI Series optical interface connectors are sold separately. They are available for purchase from our website here: (Item #50516).

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CE labeled RoHS Compliant
We typically stock RoHS compliant / CE marked equipment for this Keysight / Agilent 81534A.
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Stock # 45212-1
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Keysight / Agilent 81534A Return Loss Module

  • Sensitive Power Measurements
  • Integrated Directional Coupler
  • Agilent Lightwave Mainframe Module


The Agilent Return Loss Meters are ideal for making measurements on fast telecommunications systems, such as filters, multiplexers, cross-connects, amplifiers and whole systems under test. They can also be deployed in both R&D and production environments and are suitable for singlemode applications.

Power Meter/Coupler Based Measurements
Return loss measurements can be made using a power meter such as the Agilent 8153A or 8163A lightwave multimeter and the Agilent 81534A return loss module. The return loss module contains a sensitive detector and a directional coupler. The source illuminates the test device, while the directional coupler and detector sense only the power that is traveling in the reverse direction. This system is best suited for accurate measurement of devices with a single reflection such as connectors, splices and attenuators. It is also used to measure the aggregate or “total” return loss of a device with multiple reflections.

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Fiber Interface9/125 µm

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Item Images

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Agilent / HP 81534A Return Loss Module

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Manuals, Datasheets, Drivers, Links

Agilent 8153xx Datasheet (pdf) 
Link to Keysight / Agilent Website 

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