JHH,
This question is related to your previous posting, I paste the link just for reference:
http://exchange.ni.com/servlet/Redirect?id=9116054
Regarding your question:
1) Is it possible to have the Y waveform generated with an analog output controlled by AO_VWrite(), and the fast varying x waveform controlled by buffered output?
Yes, based on your application description it seems totally possible. You can update the Y-axis voltage (single AO update) every time you run your trace-retrace on the x-axis with a (single) buffered AO operation. The Single Buffered AO examples that ship with DAQ will help with that part of the code. The single update you can just do as you did before with the 6703 board.
I hope this helps,
Alejandro Asenjo
National I
nstruments
Applications Engineer