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Images of the signal AD9789

Question asked by sda7 on Jul 30, 2012
Latest reply on Aug 27, 2012 by sda7



AD9789 DAC.

I see images of the signal if the output spectra are located with a distance of 8 MHz (fig2). If the output spectra are located near one another then the images are absent (fig1). Sampling frequency 1728 MHz, the center of the bandpass filter 498 MHz. Why is this happening? How to eliminate this effect?