Couple of things I am not clear about your situation
1. You are generating AO from MAX abt 0.8V, and where are you seeing this signal on as on MAX you will not be able to do both simultenously/
2. Also when you stop AO task it will hold in the last value,
3. What error you get when you self cal it- as that should not be the case. You might want to re cal it or repair it.
4. Try running AI-AO sync example from lv example finder.
0.8V consistently is the output of AO, even with DC out set to 0. I am measuring this on a scope and a DMM.
Yea I talked to some people at NI today about the self cal failure, and then they deemed the PXI card acceptable for an RMA.
And anytime I try to measure an input via AI i observe 10Vdc in MAX, regardless of whether I have a signal connected or not.
So I sent it today and hopefully they will be able to recalibrate it.
Thanks for your help.