The 4246-63 from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency 10 MHz to 2.5 GHz, Attenuation Range 63 dB, Attenuation Step 1 dB, Power 180 W, Insertion Loss 11 dB. Tags: Benchtop, Programmable, Digital, USB Controlled, Computer Controlled. More details for 4246-63 can be seen below.