STC-75311405-10-C1 is a W-Band down-converter that converts millimeterwave signals from the frequency range of 75 to 110 GHz to the baseband at 6 to 41 GHz. The down-converter has a built-in phase locked oscillator (PLO), which is externally referenced at 10 MHz. The down converter also integrates a PIN diode based SPDT switch at the RF input for bypassing in order to monitor the receiving signal level. The switch is controlled by TTL signal and the bypassing “on” is at TTL “Low.” The bypassing loss is 4 dB typical and 6 dB maximum. The RF ports for the downconverter is WR-10 waveguides with UG-387/U-M anti-cocking flange. The IF output is a K(F) connector and PLO reference signal input connector is an SMA (F) connector. A wall mount AC adapter is included for AC powering.