STC-58390305-12-C1 is an extended E-Band down-converter that converts millimeterwave signals from the frequency range of 58 to 90 GHz to the baseband at 4 to 36 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 swith at the RF input for receiving signal level monitoring. 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 are WR-12 waveguides with UG-387/U anti-cocking flange. The IF output is a 2.92 mm (F) connector and PLO reference signal input connector is an SMA(F) connector. A wall mount AC adapter is included for AC powering.