NIDAQ session-based analog output startBackground(s) 240ms lag until initialization

I have a NI USB-6...(BNC) device and i try to analog output a signal without any latencies. Regarding the call startBackground(s) i could measure a about 240ms lag until the actual signal is transmitted. I did this using another direct trigger signal, bypassing the NIDAQ pipeline, through a parallel port and measuring the difference of this trigger signal and the desired signal i try to transmit through the NIDAQ pipeline.

I initialized a DAQ session

added an analogOutputChannel

queued my data into the device buffer

then: startBackground(s)

How comes there is such a large latency?

I am not the first or only one with this problem: http://de.mathworks.com/matlabcentral/answers/167075-startbackground-timing-ni-daq?s_tid=srchtitle

Thanks!

[Stephanie Badde]

Hi, we're struggeling with the same problem. Did you ever find a solution?