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AD9910 Evaluation Board Harmonics

Question asked by jaiyen on Mar 5, 2013
Latest reply on Mar 6, 2013 by LouijieC

I am programming the AD9910 with its default setting and changing only the Frequency Tuning Word (FTW).  I am using a 1GHz clock and outputting 100MHz.  The output spectrum is pretty clean with the exception of the 2nd harmonic is only -6dBc down.  What am I doing wrong, is there some other registers that I need to set?

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