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Generating 55M sine wave by using AD9914

Question asked by waderose on Oct 24, 2017
Latest reply on Nov 6, 2017 by mcee

Hello, the external crystal oscillator 50M input AD9914, through the internal frequency doubling to 2.50GHz as the internal clock, using the serial programming want to output 55M sine wave. Why does the output sine wave feel modulated? I chose profile1 with a single frequency mode.