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Frequently Asked Question

How do I perform amplitude modulation on the output?

Some of the ADI DDS products have a scale factor or digital multiplier between the DDS core and the DAC. On these parts amplitude modulation can be achieved by writing a digital value to the appropriate register (amplitude scale factor). This value can be updated at the necessary modulation rate. The user must assure that the part can accept data at the required update rate via its serial or parallel I/O interface.