The 151T-31 from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency 0 to 4000 MHz, Attenuation Range 0 to 63.75 dB, Power 100 W, Insertion Loss 1.5 to 1.90 dB. Tags: Benchtop, Programmable, Digital, Computer Controlled. More details for 151T-31 can be seen below.