XS9900DXS9900D Xcruiser Satellite-Meter ENG- 36Spectrum AnalyzerIn this menu you can control the transponders over the whole spectrum.� Choose Spectrum analyzer in the main menu, or Start the Spectrum-analyzer by choosing SPECTRUMFigure 13: Spectrum analyzerAdjustmentF4 Changes the sampling-frequency between 4MHz und 16MHzF3 Changes between 13V and 18V (horizontal, vertical)