Impedance-matching pad TNC (50 ohms) - F type (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, a attenuation value from 0 to 60 dB, and a 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.