STE-KF1206-00-S1 is a D-Band X12 frequency extender that uses an input frequency range of 9.16 to 14.16 GHz at +5 dBm along with harmonic generation and filtering to produce a 110 to 170 GHz RF signal. The typical output power is 0 dBm across the frequency range. The assembly is designed and manufactured as a bench top unit to extend the low frequency synthesizer or sweeper, such as Eravant models STL-SG-022203-S1 or SOT-02220313200-SF-B6, without losing all of the functionalities and features. The extender also features adjustable legs, which can also be removed, to allow for an easy test set up.