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Need help by configuring TSW3085EVM

Hi

i want to create a 4 Mhz-bandwith signal at 2.672 GHz .In the High speed converter i create this tones.  I apply a LO at 2.1672 Mhz  When i load in the 3085 GUI the file

DAC34821228p8MHz_2xInt_NCO_30 Mhz_single_sync_source_mode

and send, i can observe on the analyser a lot of signals with 150 Mhz difference to the LO. Can someone explain the settings that i have only my wanted signal. i assume the settings in the  NCO section the reason. One time i could observe only my modulated carrier, but up to now icant find out the settings

Thanks for answers