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Question about AD9910 to design a sweeping frequency signal resource?

Question asked by Zze on Jun 6, 2017
Latest reply on Jun 22, 2017 by JLKeip

I would like to use AD9910 design a sweeping frequency signal source, the sweep frequency range is 1MHZ to 21MHZ, step value is 100HZ, sweep time is 10ms, but now the problem is that when I configure the corresponding register, Sweep time and step value is always 5ms, 100HZ, or 10ms, 50HZ. but can not get the result of  10ms, 100HZ sweep signal source, I would like to know where the problem lies? Or that this is a specific law?please help me.thank you very much~