Rajesh, Sorry for not getting back sooner. Please do the following changes to your procedure: 1. Change K =19 on JESD block page. This is what the FPGA will be set to. 2. Leave N and N' as 15. 3. On SYSREF and SYNC tab, change the SYSREF divider to 320. This should give you a 200M tone at the DAC output. If you want to use the NCO, you must use I/Q data, not real data. Then on the Digital(DAC A) tab, you must enable the mixer and NCO and provide a NCO frequency. After this, click on "UPDATE NCO" to load the NCO frequency registers. Regards, Jim
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