The Keysight 11793A microwave converter downconverts microwave signals to the frequency range of the Keysight 8902A measuring receiver. For signals above 1.3 GHz, the 11793A routes the signal through its internal mixer. Below 1.3 GHz, signals are routed directly to the input of the 8902A. The 11793A requires + 8 dBm leveled output from the local oscillator. For LOs with insufficient power above 18 GHz, the 11793A offers an optional 18 to 26.5 GHz amplifier.