Fast simultaneous analogue output

[probably]

I am using a PCI-6229 multifunction DAQ card and DAQmx/LabVIEW 7.1.

I am attempting to do simultaneous two channel analgoue output. I have used timing property nodes to enable the simultaneous analogue output option, and have switched the sample clock to on-demand. As far as I understand, it is only possible to do a single sample on both channels at once; if a simultaneous waveform is required, then a while loop has to be constructed (I have seen the sample NI code for how to do that)

As far as I can see, this is a software timed output. Given that the only clock I then have access to is the 1kHz system clock, how do I enable two channel simultaneous analogue output at (say) 10ksamples/s.

Apologies if this has already been answered, I couldn't find it.

Thanks.

[Approximately]

Can you tell me more about what your inputs and outputs need to be. Do you have any code? even broken code? I think I'm working on something similar, but I don't quite understand what you are trying to do.
-Rick