AD9957 spurious output

Hi,

we are using AD9957 in QDUC at 350 MHz and we have sample rate harmonic spurs on output, with a PDCLK 96 MHz rate

for a 96 MHZ sample rate.

In the plot in the AD9957 datasheet I don't see this kind of spurs, could you suggest us something to limit the problem?

Many thanks and best regards

Claudio

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