We are using adf9910, and we have already used single tone mode and slope mode，however the power of the two modeis 32dBm,and what we need is 12dBm. I wonder how to get 12dBm.
You mean AD9910?
The relative amplitude of the DDS signal can be digitally scaled (relative to full scale) by means of a 14-bit amplitude scale factor (ASF). check page 23 of datasheet.
Although I am not sure that your output power measurement is correct. 32dBm is quite high.
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