Official Keysight 81613A manufacturer reference image. The exact 81613A label is visible on the fourth module from the left. The other return-loss modules are illustrative companion products.
Official Keysight 81610A manufacturer reference image. The exact 81610A label is visible on the leftmost of five modules. The other four return-loss modules are illustrative companion products.
Exact-model reference photo of a legacy Agilent 81633A optical power sensor module. Actual used unit, installed options, and supplied accessories may vary.
Official module comparison: the target 81634B is at right and the different 81630B is at left. This reference is not a two-module package; actual connector configuration and supplied unit must be confirmed.
