NI-DAQ 6036E

[Tom_W_[DE]]

Hi Minguccio-

Actually, the maximum update rate for your card when using DMA transfers (the default unless otherwise specified) is 10kS/sec.  This means that you can update points at this rate, but in order to see a smooth sine wave you will need to output several points per cycle.  A good choice for a smooth representation would be 10 points per cycle or more which would result in an ultimate output waveform frequency of 1kHz.  The DAQ driver will allow you to exceed the 10kS/sec limit but will give you a warning that you are compromising accuracy (i.e. exceeding the minimum required settling time) and that the full resolution can not be guaranteed.  So, this probably explains why you're not seeing the best performance with your setup- the card really isn't meant to update that fast.

If you need to update at higher rates with better accuracy, you may want to consider one of the newer high-speed M Series boards such as the PCI-6251.  Hopefully this helps-