Methods and systems for extracting and adapting data are set forth. An oscillation output of the first output oscillation circuits enters a broad band buffer amplifier circuit through a stage-to-stage coupling capacitor and an oscillation output of the second output oscillation circuit enters the broad band buffer amplifier circuit through frequency selective filters and the stage-to-stage coupling capacitor. A pair of rotatable hubs aligned along a longitudinally extending axis with one of the hubs disposed in a forward portion of the frame and the second hub disposed in an aft part of the frame.