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AD9361 image interference and harmonic interference

Question asked by Tyrant98 on Sep 8, 2017
Latest reply on Sep 8, 2017 by Tyrant98

I use the DDS to produce all the 1MHz cos and a sin signal through the digital data interface in the CMOS mode passed to the AD9361, AD9361 launch of the local oscillator frequency is 2290MHz, in the spectrum analyzer to see the mirror is not suppressed, and harmonic Interference is very serious, but the use of 9361 internal BIST register to see the launch part of the suppression is very good, I do not know what the reason is the timing of the interface problems or register configuration problems? The drawings are mirrors and harmonics seen on the spectrum analyzer.