I am still bonding with the code from the Internet but I was able to make a small tweak and it is now sweep generator running from 1Mhz to 60Mhz. I need to increase the step rate or it will finish about the time I retire but the general principle worked.
I think that there are more efficient ways to handle writing out the data word groups to the AD9851 but I will need to better understand this before I can look at those kinds of things. (crawl, walk, run, fall.)
73 de NG0R