Thanks Lynn,
You have me on the right track.
FYI,
What I meant by serial-data stream is - 001101001011101010110001...
So I'll use your suggestion to generate the zero count. Using the above we have 2,0,1,2,1,0,0,1,1,1,0,3. Next, I'll build a waveform knowing the length of the zero sequences.
If anyone knows of a easier way, let me know.
Thanks again,
John