The QDA-8000-12000-63.75-0.25 from Qualwave is a RF Variable Attenuator with Frequency 8 to 12 GHz, Attenuation Range 0 to 63.75 dB, Attenuation Accuracy ±2 dB, Insertion Loss 2.8 dB. Tags: Digital. More details for QDA-8000-12000-63.75-0.25 can be seen below.