Hi Woo,
Would you prefer to make your own firmware to interface to the DAC3482? If so you can start with this project for the TSW1400:
http://www.ti.com/analog/docs/litabsmultiplefilelist.tsp?literatureNumber=slaa545&docCategoryId=1&familyId=2023
Since the data for the DAC is coming from a static memory in the TSW1400 firmware - would it be easier to apply these changes to the pattern file before loading it into HSDC Pro and then to the TSW1400? Or would your firmware changes be some dynamic change over the repeated buffers? I just wondering if it would be easier to pre-process the data vs doing some kind of firmware change.
Ken.