Why Won't the SCXI-1100 Sample Faster Than 100k S/s?Hardware: SCXI>>Modules>>SCXI-1100
Problem: The SCXI-1100 has a maximum sampling rate of 166k S/s. However, anytime I set the sampling rate above 100k S/s I get an error. Why is this happening? Solution: Currently the DAQmx driver does not allow the card to sample at a rate that would drop the module's resolution below 14 bits. In this case this maximum rate for 14-bit resolution comes out to 100k S/s even though the module can go faster. To achieve the module's actual maximum rate of 166k S/s (and the corresponding 13-bit resolution), manually set the AIConvert.Rate property to 166k S/s with a Timing Property Node in LabVIEW as shown below.
Related Links: KnowledgeBase 27SDGMCM: Determining Maximum Scan Rate for Multiple SCXI Modules KnowledgeBase 2XPE1QCW: How is the Convert (Channel) Clock Rate Determined in NI-DAQmx and Traditional NI-DAQ? Attachments:
Report Date: 05/21/2009 Last Updated: 06/19/2009 Document ID: 4XK8KIMK |
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