DAC39RFS12: DAC39RF10EF

Part Number: DAC39RFS12
Other Parts Discussed in Thread: DAC39RF10EF

I USE DAC39RF10EF and I want to use DUC function. I JMODE1 but DUC not Work,Should I use Higher Jmode? by the way could you please give me new GUI for refence? Tank you very much!