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DAC34J84 Observing Spurs

Sukesh T
Prodigy 10 points
Other Parts Discussed in Thread: LMK04826, DAC38J84, TRF3722, TRF3705

Hi,

I am using the evaluation board of TSW38J84-05 Rev A which includes an LMK04826 and DAC38K84 and AQM chips.The setting i am using as below

DAC settings are as below

I am trying to inject a single tone at 35MHz from the High speed card the setting is below

Set the external LO at 2132.5MHz.After initializing all, Observed the Output spectrum as below

Applied QMC and DC leakage correction 

The Spurs at marker 4, 5 and 6 are not affecting with the LO or side band corrections. This seems to be the spurs of the 2nd and 3rd harmonic of main signal combined with the Local Oscillator.This reduces when I change the input scaling factor. I hope this spurs are not expected to be present on the outputs. Can you please suggest what would be the reason for it?

Regards,

Sukesh.T