The QDAT6-4-8-63 from Qualink Microwave is a RF Variable Attenuator with Frequency 4 to 8 GHz, Attenuation Range 63 dB, Attenuation Step 1 dB, Attenuation Accuracy 1 dB, Insertion Loss 9.5 dB. Tags: Module with Connectors, Digital. More details for QDAT6-4-8-63 can be seen below.