The Agilent 86103A provides the ideal measurement system for testing SDH/SONET signals operating at 155 or 622 Mb/s or Fibre Channel 1063 Mb/s and Gigabit Ethernet 1250 Mb/s rates. The calibrated, integrated optical receiver, with over 2.8 GHz bandwidth, allows for easy, precise measurements of single-mode or multimode optical signals. For compliance testing, a hardware filter for both 155 and 622 Mb/s or 1063 and 1250 Mb/s testing can automatically be switched in to create a calibrated reference receiver. The switchable filter minimizes setup time while maximizing measurement repeatability.