LMX2594: Multiple 10kHz spurs seen in narrow band as high as -45dBc?

Hi team,

customer is asking if you have ever looked closely at the spurs with a DEN = 10,000?

when they look in the narrow band such as 200kHz BW, they see a multitude of 10kHz spurs and some are as high as -45dBc. is this expected?

if not, how should we go about solving this?

Thanks,

Kevin