Simultaneous analog output multiple channels

[Dimo]

I'm using DAQmx NI-USB.

I want to generate two analog output signals simultaneously, i.e. change both outputs at the same time.

Simple example:

 

What happens is that instead of two outputs changing simultaneous, there is 1mS delay:

 

I want to generate differential output, using two channels, but the delayed response is not  acceptable.

Any suggestions? 

[Seth_B.]

Try using a DAQmx Timing Property Node and set the On Demand "Simultaneous Analog Output Enable" property to True.  The default behavior to configure and update each AO channel sequentially when doing On Demand writes.

Regards,

[Dimo · Accepted solution]

Hi Seth B,

Yes, this works!

One remark- to make this property visible I had to enable "show all attributes" in "select filter" menu (right click on the property node).

Thanks. 

[Seth_B.]

Hi Dimo,

I'm glad to hear it worked!  Which device are you using, specifically.  If it is a supported property for your device, it should show up by default. This may need to be filed as a Corrective Action Request.

Regards,

[Dimo]

It is NI USB 6259.

Default was:

 

I had to tick one of the first two options to make it visible.