Impedance matching pads BNC (50 ohms) / BNC (75 ohms), the RF coaxial fixed attenuator product line of API Inmet offers 12 different connector types, a frequency range from DC to 50 GHz, attenuation values from 0 to 60 dB, and power handling capacity from 0.5 to 300W. The 75 ohm fixed attenuator provides three connector types: F type, N type and BNC. The 1 watt matching pad is for 50 to 75 ohms.