STC-N18-06-S1-IDP is a D-Band down-converter that converts sub-THz wave signals from a frequency range of 110 to 170 GHz to the baseband at 1.875 GHz. The down-converter requires 6.11 to 9.44 GHz at +10 dBm input power as its LO. An internal diplexer is included resulting in a single connectorized port for LO and IF configured for compatible spectrum analyzers, such as Anritsu’s MS2850A. The down-converter has low harmonic levels and excellent gain flatness, making it a good candidate to extend low frequency test equipment for millimeter wave testing purposes.