The QDA-1000-40000-63.5-0.5 from Qualwave is a RF Variable Attenuator with Frequency 1 to 40 GHz, Attenuation Range 0 to 63.5 dB, Attenuation Accuracy ±2 dB, Power 0.31 W, Insertion Loss 11.5 dB. Tags: Module with Connectors, Digital. More details for QDA-1000-40000-63.5-0.5 can be seen below.