Calibration system for YIG (yttrium-iron-garnet)-tuned filter (YTF) in spectrum analyzer

摘要

The spectrum analyzer's oscillator (18) provides a stimulus signal (17) that is applied to the YTF (20). A mixer (16) detects reflections of the stimulus signal by the YTF while control signals (Ic) applied to the YTF are varied to adjust its passband frequency. The detect reflections are recorded and analyzed to establish a correspondence between Ic and the passband center frequency.