These attenuators offer repeatability of better than 0.03 dB and excellent life (greater than 2 million switching cycles per section). The M family of programmable step attenuators offers coaxial measurements to 50 GHz in a compact rugged design. The first model is the Keysight 84904M, which offers outstanding performance with an attenuation range of 0 to 11 dB in 1 dB steps. The next, high frequency model, is the Keysight 84905M, which provides a range from 0 to 60 dB in 10 dB steps. Last, the Keysight 84908M provides an attenuation range from 0 to 65 dB in 5 dB steps.