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Clarification of Amplitude Modulation concept in AD9854

Question asked by ranjan on Jan 22, 2012
Latest reply on Jan 23, 2012 by ranjan


   I am interested in generating a particular envelope for amplitude modulation(say a sinc envelope). I am planning to use the digital multipliers and the programmable 12 bit I and Q registers(0x21 to 0x24). Once I have generated a sinusoid of particular frequency by writing into FTW1(0x04 to 0x09), in order to robustly vary the amplitude of this wave i understand that I have to program the I and Q registers. My doubt is whether there is any way to define the waveform characteristic in 12 bits or I should know the amplitude at every point and then load the registers with this value continuously so that the desired amplitude is shaped.