Here’s the page we think you wanted. See search results instead:


Contact an Expert

8156xA Variable Optical Attenuators

Product Status: Obsolete | View Service Options
This product is no longer available

A replacement for this product is available:


The Keysight 81560A and 81561A are small and cost effective attenuator modules with high resolution. The Keysight 81566A and 81567A feature power control functionality that allows setting the output power level directly. When the power control mode is enabled, the module automatically corrects power changes at the input to maintain the output level set by the user.