The 8331-A8-XX-XX from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency DC to 3 GHz, Attenuation Range 64.5 dB, Power 1 W, Peak Power 76.99 dBm, Insertion Loss 6 dB. Tags: Rackmount, Programmable, Digital, USB Controlled, Computer Controlled, Multi-Channel. More details for 8331-A8-XX-XX can be seen below.