Reflectometer Bridge 0.01-26.5GHz, 3.5mm The Agilent (now Keysight) 85027E is a directional bridge and designed to operate with either the Keysight 8757 in ac or dc detection modes or with the Keysight 8756 or Keysight 8755 in ac detection mode. Can detect ac and dc signals depending on scalar network analyzer used High directivity Excellent test pot match Measurement range up to 26,5 GHz in coax