Quantic PMI Model No. PVAN-100M300M-20-SFF is a voltage-controlled attenuator that operates over the 100 to 300 MHz frequency supplying 20 dB of attenuation typically with 0 to -5 V control. It has less than 1.5 dB of insertion loss and a VSWR of less than 1.5:1 in the 0 V state.