I am using DAQ Assistant to drive a triangular and sine waveform and
record the resulting current. So basically analogue in and one analogue
out channels are used. The output waveform is a sine wave (100 Hz)
moving up and down a triangular wave (1Hz). The DAQ Assistant is set to
10000 samples per second and 10000 for the No of samples and is set to
continuous. When the "Integer No of Cycles" box is unticked the input
waveform looks fine but it looks like the output waveform inverts after
10000 points. If the the samples per second is changed to 7000 the
ouput waveform inverts after 7000 points. The data recorded to a text
file has three columns: time, voltage out and current in which is ok.
However, when "Integer No of Cycles" box is ticked the no of
columns starts at three but then goes back to two columns (time and
input current) and then back to three columns again and so on.. But,
additionally, the input current waveform looks fine without any
inversion problems when the "Integer No of Cycles" box is ticked. Can
anybody help?
thanks,
Martin