I have a question about the sample rate: i have acquire 4 channels and i use the vi "acquire waveforms.vi". For example if I set the sample rate to 50 ksample/s , the daq acquire each channel with 50 ksample/s or 50k/4 ? I use a DAQ with a max sample rate of 200 ksample/s.
Perhaps the following Data Acquisition Sampling Terminologyhere may help you understand your problem
Specifically "Sample/Sampling rate (scan rate) The
rate at which one sample per channel is acquired; the rate at which the
sample (scan) clock is set. Note that the maximum sampling rate
specification for our E Series data acquisition boards refers to the
maximum rate at which a single channel can be acquired. For example,
the PCI-6071E is capable of a 1.25 MS/s sampling rate. This may consist
of 1.25 MS/s on one channel or 250 kS/s on five channels."