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Problems by implementing a costum ip core into the reference design

Question asked by Chris90 on Aug 20, 2015
Latest reply on Aug 27, 2015 by Chris90

Hello,

 

for my master thesis I am implementing a user ip core in the receiving part of the refernce design (between the AD9361 and the ADC_DMA). I am using the Zedboard and the FMCOMMS2.

 

Now, I have the following problem. When I am trying to test the system with a known signal (sinusoidal signal) I am getting at the quadrature-component a disturbed sinusoidal signal, whereas the inphase-component is the known signal. The quadrature-component looks like getting overlapped by noise. Furthermore, I connected the I and Q signal to the ILA in front of my costum IP Core.

 

Is it possible that this problem arise by timing failure?

 

When I am testing the Reference design without my IP Core I can see the inphase as well as the quadrature component without any disturbances.

 

Best regards,

Christian

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