STC-N15-06-S1 is a D-Band down-converter that converts millimeter wave signals from a frequency range of 110 to 170 GHz to the baseband at 1.6 GHz. The down-converter requires 9.167 to 14.167 GHz at +3 dBm input power as its LO, which can be obtained from a standard 20 GHz synthesizer, such as Eravant models STL-SG-022203-S1 or SOT-02220313200-SF-B6. The down-converter has low harmonic levels and excellent gain flatness, making it a good candidate to extend low frequency test equipment for millimeterwave testing purposes.