Here's a link to a ham project that uses the '9851, including a 3-line basic stamp program (essentially the same as PBP):

http://www.amqrp.org/kits/dds60/DDS_...anual_v1.3.pdf

Look at page 11 of the manual.

Also, On analog Devices website page for the '9851, there's a "design assistant" that will give you the sequence of control bytes for any given set on configuration conditions.

Joe