For DAC1 and DAC2 of AD9788, can user set disable or enable for NCO individually?
The below is a figure of image of the circuit which wants to come out.
The real and imaginary paths of the NCO are enabled and disabled together.
The NCO outputs are the sums of the real and imaginary parts so the I/Q inputs need to be a pair of quadrature signals. The NCO does not support modulation for inputs with two separate frequencies.
AD9788 can output high-side image or low-side image.
Can I use such as the following?
DAC1: high-side image
DAC2: low-side image
No. The high side and low side setting is only valid when you have a quadrature input. The two DACs need to be used together for any NCO related applications.
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