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KEYSIGHT 81610A Return Loss Module w/o internal source

Keysight's 81610A Return Loss module is the tool of choice for measuring return loss (RL) and reflection of single-mode fiberoptic components.

KEYSIGHT 81613A Return Loss Module 1310/1550nm

The Keysight 81610A and 81613A Return Loss Meter are optimized for return loss applications with an external source across a broad wavelength range, but also with an integrated laser source at 1310/1550nm (81613A).