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AD-FMCOMMS1-EBZ Input to Output Passthru?

Question asked by Stu_Adaptive on Dec 5, 2013
Latest reply on Dec 11, 2013 by Stu_Adaptive

I am running KC705/No-OS drivers and I have verified that the A/D path works fine and the D/A path works fine from the FPGA perspective.  I can sample A/D Data and FFT looks good for various tones that I generate and on the DAC side, I use the DDS supplied with the reference design and the output on the SpecAn looks good.  My goal is to eventually use the A/D data, process it, and send it out to the DAC.  My first step, however, is to show that I can pass the signal through directly from the A/D to the DAC.  Unfortunately, I have been unsuccessful and I see lots of spurs that depend on input frequency.  One thing that happened is the SED functionality was wiped out when I removed the DDS from the DAC logic.  How important is the SED functionality?  Are there any other "gotchas" i should be aware of?

 

Thanks,
Stu

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