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TSW3084EVM: Spurs with example setup

Expert 1545 points
Part Number: TSW3084EVM
Other Parts Discussed in Thread: DAC3484


We are running the example setup section 3.4 in the user guide, using TSW3084 and  TSW1406

Please see the attached picture with spurs at offset of n*1.228MHz. I'm guessing that it is related to the DAC CLK 1228.8MHz, but we cannot eliminate those spurs. 

We tried shutting down every non essential function in the board including clock but no success

Please advise