The Ando AQ3150 optical attenuator provides high perforrnance and programmable operation, with an attenuation range from 0 to 60dB in 0.001dB steps, switchable without interruption. Offering excellent attenuation accuracy and return loss, support for high-power applications and low dependence on polarization, here is the ideal instrument for development of WDM systems and EDFA and other optical devices, as well as for automated systems on the manufacturing inspection line.